1
|
Arnqvist G, Westerberg I, Galbraith J, Sayadi A, Scofield DG, Olsen RA, Immonen E, Bonath F, Ewels P, Suh A. A chromosome-level assembly of the seed beetle Callosobruchus maculatus genome with annotation of its repetitive elements. G3 (Bethesda) 2024; 14:jkad266. [PMID: 38092066 PMCID: PMC10849321 DOI: 10.1093/g3journal/jkad266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 10/30/2023] [Indexed: 02/09/2024]
Abstract
Callosobruchus maculatus is a major agricultural pest of legume crops worldwide and an established model system in ecology and evolution. Yet, current molecular biological resources for this species are limited. Here, we employ Hi-C sequencing to generate a greatly improved genome assembly and we annotate its repetitive elements in a dedicated in-depth effort where we manually curate and classify the most abundant unclassified repeat subfamilies. We present a scaffolded chromosome-level assembly, which is 1.01 Gb in total length with 86% being contained within the 9 autosomes and the X chromosome. Repetitive sequences accounted for 70% of the total assembly. DNA transposons covered 18% of the genome, with the most abundant superfamily being Tc1-Mariner (9.75% of the genome). This new chromosome-level genome assembly of C. maculatus will enable future genetic and evolutionary studies not only of this important species but of beetles more generally.
Collapse
Affiliation(s)
- Göran Arnqvist
- Animal Ecology, Department of Ecology and Genetics, Uppsala University, Uppsala SE75236, Sweden
| | - Ivar Westerberg
- Systematic Biology, Department of Organismal Biology, Uppsala University, Uppsala SE75236, Sweden
- Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm SE10691, Sweden
| | - James Galbraith
- School of Biological Sciences, University of Adelaide, Adelaide 5005, Australia
- Faculty of Environment, Science and Economy, University of Exeter, Cornwall TR10 9FE, UK
| | - Ahmed Sayadi
- Rheumatology, Department of Medical Sciences, Uppsala University, Uppsala SE75236, Sweden
| | - Douglas G Scofield
- Evolutionary Biology, Department of Ecology and Genetics, Uppsala University, Uppsala SE75236, Sweden
- Uppsala Multidisciplinary Center for Advanced Computational Science, Uppsala University, Uppsala SE75236, Sweden
| | - Remi-André Olsen
- Science for Life Laboratory, Department of Biochemistry and Biophysics, Stockholm University, Stockholm SE10691, Sweden
| | - Elina Immonen
- Evolutionary Biology, Department of Ecology and Genetics, Uppsala University, Uppsala SE75236, Sweden
| | - Franziska Bonath
- Science for Life Laboratory, Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm SE10691, Sweden
| | | | - Alexander Suh
- Systematic Biology, Department of Organismal Biology, Uppsala University, Uppsala SE75236, Sweden
| |
Collapse
|
2
|
Arnqvist G, Rowe L. Ecology, the pace-of-life, epistatic selection and the maintenance of genetic variation in life-history genes. Mol Ecol 2023; 32:4713-4724. [PMID: 37386734 DOI: 10.1111/mec.17062] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 06/09/2023] [Accepted: 06/19/2023] [Indexed: 07/01/2023]
Abstract
Evolutionary genetics has long struggled with understanding how functional genes under selection remain polymorphic in natural populations. Taking as a starting point that natural selection is ultimately a manifestation of ecological processes, we spotlight an underemphasized and potentially ubiquitous ecological effect that may have fundamental effects on the maintenance of genetic variation. Negative frequency dependency is a well-established emergent property of density dependence in ecology, because the relative profitability of different modes of exploiting or utilizing limiting resources tends to be inversely proportional to their frequency in a population. We suggest that this may often generate negative frequency-dependent selection (NFDS) on major effect loci that affect rate-dependent physiological processes, such as metabolic rate, that are phenotypically manifested as polymorphism in pace-of-life syndromes. When such a locus under NFDS shows stable intermediate frequency polymorphism, this should generate epistatic selection potentially involving large numbers of loci with more minor effects on life-history (LH) traits. When alternative alleles at such loci show sign epistasis with a major effect locus, this associative NFDS will promote the maintenance of polygenic variation in LH genes. We provide examples of the kind of major effect loci that could be involved and suggest empirical avenues that may better inform us on the importance and reach of this process.
Collapse
Affiliation(s)
- Göran Arnqvist
- Animal Ecology, Department of Ecology and Genetics, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden
| | - Locke Rowe
- Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Ontario, Canada
- Swedish Collegium of Advanced Study, Uppsala, Sweden
| |
Collapse
|
3
|
Boman J, Arnqvist G. Larger genomes show improved buffering of adult fitness against environmental stress in seed beetles. Biol Lett 2023; 19:20220450. [PMID: 36693428 PMCID: PMC9873469 DOI: 10.1098/rsbl.2022.0450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Our general understanding of the evolution of genome size (GS) is incomplete, and it has long been clear that GS does not reflect organismal complexity. Here, we assess the hypothesis that larger genomes may allow organisms to better cope with environmental variation. It is, for example, possible that genome expansion due to proliferation of transposable elements or gene duplications may affect the ability to regulate and fine-tune transcriptional profiles. We used 18 populations of the seed beetle Callosobruchus maculatus, which differ in GS by up to 4.5%, and exposed adults and juveniles to environmental stress in a series of experiments where stage-specific fitness was assayed. We found that populations with larger genomes were indeed better buffered against environmental stress for adult, but not for juvenile, fitness. The genetic correlation across populations between GS and canalization of adult fitness is consistent with a role for natural selection in the evolution of GS.
Collapse
Affiliation(s)
- Jesper Boman
- Evolutionary Biology, Department of Ecology and Genetics, Uppsala University, Uppsala, Sweden
| | - Göran Arnqvist
- Animal Ecology, Department of Ecology and Genetics, Uppsala University, Uppsala, Sweden
| |
Collapse
|
4
|
Immonen E, Sayadi A, Stojković B, Savković U, Đorđević M, Liljestrand-Rönn J, Wiberg RAW, Arnqvist G. Experimental Life History Evolution Results in Sex-specific Evolution of Gene Expression in Seed Beetles. Genome Biol Evol 2022; 15:6948356. [PMID: 36542472 PMCID: PMC9830990 DOI: 10.1093/gbe/evac177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 12/06/2022] [Accepted: 12/13/2022] [Indexed: 12/24/2022] Open
Abstract
The patterns of reproductive timing and senescence vary within and across species owing to differences in reproductive strategies, but our understanding of the molecular underpinnings of such variation is incomplete. This is perhaps particularly true for sex differences. We investigated the evolution of sex-specific gene expression associated with life history divergence in replicated populations of the seed beetle Acanthoscelides obtectus, experimentally evolving under (E)arly or (L)ate life reproduction for >200 generations which has resulted in strongly divergent life histories. We detected 1,646 genes that were differentially expressed in E and L lines, consistent with a highly polygenic basis of life history evolution. Only 30% of differentially expressed genes were similarly affected in males and females. The evolution of long life was associated with significantly reduced sex differences in expression, especially in non-reproductive tissues. The expression differences were overall more pronounced in females, in accordance with their greater phenotypic divergence in lifespan. Functional enrichment analysis revealed differences between E and L beetles in gene categories previously implicated in aging, such as mitochondrial function and defense response. The results show that divergent life history evolution can be associated with profound changes in gene expression that alter the transcriptome in a sex-specific way, highlighting the importance of understanding the mechanisms of aging in each sex.
Collapse
Affiliation(s)
| | - Ahmed Sayadi
- Department of Medical Sciences, Uppsala University, Uppsala, Sweden
| | - Biljana Stojković
- Department of Evolutionary Biology, Institute for Biological Research “Siniša Stanković”, National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia,Faculty of Biology, Institute of Zoology, University of Belgrade, Belgrade, Serbia
| | - Uroš Savković
- Department of Evolutionary Biology, Institute for Biological Research “Siniša Stanković”, National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | - Mirko Đorđević
- Department of Evolutionary Biology, Institute for Biological Research “Siniša Stanković”, National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | | | - R Axel W Wiberg
- Evolutionary Biology, Department of Ecology and Genetics, Uppsala University, Uppsala, Sweden
| | - Göran Arnqvist
- Animal Ecology, Department of Ecology and Genetics, Uppsala University, Uppsala, Sweden
| |
Collapse
|
5
|
Arnqvist G, Sayadi A. A possible genomic footprint of polygenic adaptation on population divergence in seed beetles? Ecol Evol 2022; 12:e9440. [PMID: 36311399 PMCID: PMC9608792 DOI: 10.1002/ece3.9440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 09/14/2022] [Accepted: 09/29/2022] [Indexed: 11/25/2022] Open
Abstract
Efforts to unravel the genomic basis of incipient speciation are hampered by a mismatch between our toolkit and our understanding of the ecology and genetics of adaptation. While the former is focused on detecting selective sweeps involving few independently acting or linked speciation genes, the latter states that divergence typically occurs in polygenic traits under stabilizing selection. Here, we ask whether a role of stabilizing selection on polygenic traits in population divergence may be unveiled by using a phenotypically informed integrative approach, based on genome‐wide variation segregating in divergent populations. We compare three divergent populations of seed beetles (Callosobruchus maculatus) where previous work has demonstrated a prominent role for stabilizing selection on, and population divergence in, key life history traits that reflect rate‐dependent metabolic processes. We derive and assess predictions regarding the expected pattern of covariation between genetic variation segregating within populations and genetic differentiation between populations. Population differentiation was considerable (mean FST = 0.23–0.26) and was primarily built by genes showing high selective constraints and an imbalance in inferred selection in different populations (positive Tajima's DNS in one and negative in one), and this set of genes was enriched with genes with a metabolic function. Repeatability of relative population differentiation was low at the level of individual genes but higher at the level of broad functional classes, again spotlighting metabolic genes. Absolute differentiation (dXY) showed a very different general pattern at this scale of divergence, more consistent with an important role for genetic drift. Although our exploration is consistent with stabilizing selection on polygenic metabolic phenotypes as an important engine of genome‐wide relative population divergence and incipient speciation in our study system, we note that it is exceedingly difficult to firmly exclude other scenarios.
Collapse
Affiliation(s)
- Göran Arnqvist
- Animal Ecology, Department of Ecology and Genetics, EBCUppsala UniversityUppsalaSweden
| | - Ahmed Sayadi
- Animal Ecology, Department of Ecology and Genetics, EBCUppsala UniversityUppsalaSweden,Rheumatology, Department of Medical SciencesUppsala UniversityUppsalaSweden
| |
Collapse
|
6
|
He L, Chen IW, Zhang Z, Zheng W, Sayadi A, Wang L, Sang W, Ji R, Lei J, Arnqvist G, Lei C, Zhu-Salzman K. In silico promoter analysis and functional validation identify CmZFH, the co-regulator of hypoxia-responsive genes CmScylla and CmLPCAT. Insect Biochem Mol Biol 2022; 140:103681. [PMID: 34800642 DOI: 10.1016/j.ibmb.2021.103681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 09/30/2021] [Accepted: 11/06/2021] [Indexed: 06/13/2023]
Abstract
Oxygen (O2) plays an essential role in aerobic organisms including terrestrial insects. Under hypoxic stress, the cowpea bruchid (Callosobruchus maculatus) ceases feeding and growth. However, larvae, particularly 4th instar larvae exhibit very high tolerance to hypoxia and can recover normal growth once brought to normoxia. To better understand the molecular mechanism that enables insects to cope with low O2 stress, we performed RNA-seq to distinguish hypoxia-responsive genes in midguts and subsequently identified potential common cis-elements in promoters of hypoxia-induced and -repressed genes, respectively. Selected elements were subjected to gel-shift and transient transfection assays to confirm their cis-regulatory function. Of these putative common cis-elements, AREB6 appeared to regulate the expression of CmLPCAT and CmScylla, two hypoxia-induced genes. CmZFH, the putative AREB6-binding protein, was hypoxia-inducible. Transient expression of CmZFH in Drosophila S2 cells activated CmLPCAT and CmScylla, and their induction was likely through interaction of CmZFH with AREB6. Binding to AREB6 was further confirmed by bacterially expressed CmZFH recombinant protein. Deletion analyses indicated that the N-terminal zinc-finger cluster of CmZFH was the key AREB6-binding domain. Through in silico and experimental exploration, we discovered novel transcriptional regulatory components associated with gene expression dynamics under hypoxia that facilitated insect survival.
Collapse
Affiliation(s)
- Li He
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China; Department of Entomology, Texas A&M University, College Station, TX, 77843, USA; Institute for Plant Genomics & Biotechnology, Texas A&M University, College Station, TX, 77843, USA
| | - Ivy W Chen
- Department of Entomology, Texas A&M University, College Station, TX, 77843, USA; Institute for Plant Genomics & Biotechnology, Texas A&M University, College Station, TX, 77843, USA
| | - Zan Zhang
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Academy of Agricultural Sciences, Southwest University, Chongqing, 400716, China
| | - Wenping Zheng
- Key Laboratory of Horticultural Plant Biology (MOE), Institute of Urban and Horticultural Entomology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Ahmed Sayadi
- Animal Ecology, Department of Ecology and Genetics, Uppsala University, Uppsala, 75236, Sweden
| | - Lei Wang
- Department of Entomology, Texas A&M University, College Station, TX, 77843, USA; Institute for Plant Genomics & Biotechnology, Texas A&M University, College Station, TX, 77843, USA
| | - Wen Sang
- Department of Entomology, Texas A&M University, College Station, TX, 77843, USA; Institute for Plant Genomics & Biotechnology, Texas A&M University, College Station, TX, 77843, USA
| | - Rui Ji
- Department of Entomology, Texas A&M University, College Station, TX, 77843, USA; Institute for Plant Genomics & Biotechnology, Texas A&M University, College Station, TX, 77843, USA
| | - Jiaxin Lei
- Department of Entomology, Texas A&M University, College Station, TX, 77843, USA; Institute for Plant Genomics & Biotechnology, Texas A&M University, College Station, TX, 77843, USA
| | - Göran Arnqvist
- Animal Ecology, Department of Ecology and Genetics, Uppsala University, Uppsala, 75236, Sweden
| | - Chaoliang Lei
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Keyan Zhu-Salzman
- Department of Entomology, Texas A&M University, College Station, TX, 77843, USA; Institute for Plant Genomics & Biotechnology, Texas A&M University, College Station, TX, 77843, USA.
| |
Collapse
|
7
|
Grieshop K, Maurizio PL, Arnqvist G, Berger D. Selection in males purges the mutation load on female fitness. Evol Lett 2021; 5:328-343. [PMID: 34367659 PMCID: PMC8327962 DOI: 10.1002/evl3.239] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Revised: 05/05/2021] [Accepted: 05/10/2021] [Indexed: 11/26/2022] Open
Abstract
Theory predicts that the ability of selection and recombination to purge mutation load is enhanced if selection against deleterious genetic variants operates more strongly in males than females. However, direct empirical support for this tenet is limited, in part because traditional quantitative genetic approaches allow dominance and intermediate-frequency polymorphisms to obscure the effects of the many rare and partially recessive deleterious alleles that make up the main part of a population's mutation load. Here, we exposed the partially recessive genetic load of a population of Callosobruchus maculatus seed beetles via successive generations of inbreeding, and quantified its effects by measuring heterosis-the increase in fitness experienced when masking the effects of deleterious alleles by heterozygosity-in a fully factorial sex-specific diallel cross among 16 inbred strains. Competitive lifetime reproductive success (i.e., fitness) was measured in male and female outcrossed F1s as well as inbred parental "selfs," and we estimated the 4 × 4 male-female inbred-outbred genetic covariance matrix for fitness using Bayesian Markov chain Monte Carlo simulations of a custom-made general linear mixed effects model. We found that heterosis estimated independently in males and females was highly genetically correlated among strains, and that heterosis was strongly negatively genetically correlated to outbred male, but not female, fitness. This suggests that genetic variation for fitness in males, but not in females, reflects the amount of (partially) recessive deleterious alleles segregating at mutation-selection balance in this population. The population's mutation load therefore has greater potential to be purged via selection in males. These findings contribute to our understanding of the prevalence of sexual reproduction in nature and the maintenance of genetic variation in fitness-related traits.
Collapse
Affiliation(s)
- Karl Grieshop
- Animal Ecology, Department of Ecology and GeneticsUppsala UniversityUppsalaSE‐75236Sweden
- Department of Ecology and Evolutionary BiologyUniversity of TorontoTorontoONM5S 3B2Canada
- Department of Molecular BiosciencesThe Wenner‐Gren InstituteStockholm UniversityStockholmSE‐10691Sweden
| | - Paul L. Maurizio
- Section of Genetic Medicine, Department of MedicineUniversity of ChicagoChicagoIllinois60637
| | - Göran Arnqvist
- Animal Ecology, Department of Ecology and GeneticsUppsala UniversityUppsalaSE‐75236Sweden
| | - David Berger
- Animal Ecology, Department of Ecology and GeneticsUppsala UniversityUppsalaSE‐75236Sweden
| |
Collapse
|
8
|
Arnqvist G, Grieshop K, Hotzy C, Rönn J, Polak M, Rowe L. Direct and indirect effects of male genital elaboration in female seed beetles. Proc Biol Sci 2021; 288:20211068. [PMID: 34229496 PMCID: PMC8261210 DOI: 10.1098/rspb.2021.1068] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 06/09/2021] [Indexed: 11/12/2022] Open
Abstract
Our understanding of coevolution between male genitalia and female traits remains incomplete. This is perhaps especially true for genital traits that cause internal injuries in females, such as the spiny genitalia of seed beetles where males with relatively long spines enjoy a high relative fertilization success. We report on a new set of experiments, based on extant selection lines, aimed at assessing the effects of long male spines on females in Callosobruchus maculatus. We first draw on an earlier study using microscale laser surgery, and demonstrate that genital spines have a direct negative (sexually antagonistic) effect on female fecundity. We then ask whether artificial selection for long versus short spines resulted in direct or indirect effects on female lifetime offspring production. Reference females mating with males from long-spine lines had higher offspring production, presumably due to an elevated allocation in males to those ejaculate components that are beneficial to females. Remarkably, selection for long male genital spines also resulted in an evolutionary increase in female offspring production as a correlated response. Our findings thus suggest that female traits that affect their response to male spines are both under direct selection to minimize harm but are also under indirect selection (a good genes effect), consistent with the evolution of mating and fertilization biases being affected by several simultaneous processes.
Collapse
Affiliation(s)
- Göran Arnqvist
- Animal Ecology, Department of Ecology and Genetics, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden
| | - Karl Grieshop
- Animal Ecology, Department of Ecology and Genetics, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden
- Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Ontario, Canada
| | - Cosima Hotzy
- Animal Ecology, Department of Ecology and Genetics, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden
| | - Johanna Rönn
- Animal Ecology, Department of Ecology and Genetics, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden
| | - Michal Polak
- Department of Biological Sciences, University of Cincinnati, Cincinnati, OH 45221, USA
| | - Locke Rowe
- Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Ontario, Canada
- Swedish Collegium for Advanced Study, Uppsala University, 752 38 Uppsala, Sweden
| |
Collapse
|
9
|
Bagchi B, Corbel Q, Khan I, Payne E, Banerji D, Liljestrand-Rönn J, Martinossi-Allibert I, Baur J, Sayadi A, Immonen E, Arnqvist G, Söderhäll I, Berger D. Sexual conflict drives micro- and macroevolution of sexual dimorphism in immunity. BMC Biol 2021; 19:114. [PMID: 34078377 PMCID: PMC8170964 DOI: 10.1186/s12915-021-01049-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 05/07/2021] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Sexual dimorphism in immunity is believed to reflect sex differences in reproductive strategies and trade-offs between competing life history demands. Sexual selection can have major effects on mating rates and sex-specific costs of mating and may thereby influence sex differences in immunity as well as associated host-pathogen dynamics. Yet, experimental evidence linking the mating system to evolved sexual dimorphism in immunity are scarce and the direct effects of mating rate on immunity are not well established. Here, we use transcriptomic analyses, experimental evolution and phylogenetic comparative methods to study the association between the mating system and sexual dimorphism in immunity in seed beetles, where mating causes internal injuries in females. RESULTS We demonstrate that female phenoloxidase (PO) activity, involved in wound healing and defence against parasitic infections, is elevated relative to males. This difference is accompanied by concomitant sex differences in the expression of genes in the prophenoloxidase activating cascade. We document substantial phenotypic plasticity in female PO activity in response to mating and show that experimental evolution under enforced monogamy (resulting in low remating rates and reduced sexual conflict relative to natural polygamy) rapidly decreases female (but not male) PO activity. Moreover, monogamous females had evolved increased tolerance to bacterial infection unrelated to mating, implying that female responses to costly mating may trade off with other aspects of immune defence, an hypothesis which broadly accords with the documented sex differences in gene expression. Finally, female (but not male) PO activity shows correlated evolution with the perceived harmfulness of male genitalia across 12 species of seed beetles, suggesting that sexual conflict has a significant influence on sexual dimorphisms in immunity in this group of insects. CONCLUSIONS Our study provides insights into the links between sexual conflict and sexual dimorphism in immunity and suggests that selection pressures moulded by mating interactions can lead to a sex-specific mosaic of immune responses with important implications for host-pathogen dynamics in sexually reproducing organisms.
Collapse
Affiliation(s)
- Basabi Bagchi
- Department of Biology, Ashoka University, Sonipat, India
| | - Quentin Corbel
- Department of Ecology and Genetics, Program of Animal Ecology, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden
- Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, Valencia, Spain
| | - Imroze Khan
- Department of Biology, Ashoka University, Sonipat, India
| | - Ellen Payne
- Department of Ecology and Genetics, Program of Animal Ecology, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden
| | | | - Johanna Liljestrand-Rönn
- Department of Ecology and Genetics, Program of Animal Ecology, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden
| | - Ivain Martinossi-Allibert
- Department of Ecology and Genetics, Program of Animal Ecology, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden
- Department of Organismal Biology, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden
| | - Julian Baur
- Department of Ecology and Genetics, Program of Animal Ecology, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden
| | - Ahmed Sayadi
- Department of Ecology and Genetics, Program of Animal Ecology, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden
- Department of Chemistry, Biochemistry, Uppsala University, Uppsala, Sweden
| | - Elina Immonen
- Department of Ecology and Genetics, Program of Evolutionary Biology, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden
| | - Göran Arnqvist
- Department of Ecology and Genetics, Program of Animal Ecology, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden
| | - Irene Söderhäll
- Department of Organismal Biology, Program of Comparative Physiology, Uppsala University, Uppsala, Sweden
| | - David Berger
- Department of Ecology and Genetics, Program of Animal Ecology, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden.
| |
Collapse
|
10
|
Immonen E, Berger D, Sayadi A, Liljestrand‐Rönn J, Arnqvist G. An experimental test of temperature-dependent selection on mitochondrial haplotypes in Callosobruchus maculatus seed beetles. Ecol Evol 2020; 10:11387-11398. [PMID: 33144972 PMCID: PMC7593184 DOI: 10.1002/ece3.6775] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 08/11/2020] [Accepted: 08/12/2020] [Indexed: 01/05/2023] Open
Abstract
Mitochondrial DNA (mtDNA) consists of few but vital maternally inherited genes that interact closely with nuclear genes to produce cellular energy. How important mtDNA polymorphism is for adaptation is still unclear. The assumption in population genetic studies is often that segregating mtDNA variation is selectively neutral. This contrasts with empirical observations of mtDNA haplotypes affecting fitness-related traits and thermal sensitivity, and latitudinal clines in mtDNA haplotype frequencies. Here, we experimentally test whether ambient temperature affects selection on mtDNA variation, and whether such thermal effects are influenced by intergenomic epistasis due to interactions between mitochondrial and nuclear genes, using replicated experimental evolution in Callosobruchus maculatus seed beetle populations seeded with a mixture of different mtDNA haplotypes. We also test for sex-specific consequences of mtDNA evolution on reproductive success, given that mtDNA mutations can have sexually antagonistic fitness effects. Our results demonstrate natural selection on mtDNA haplotypes, with some support for thermal environment influencing mtDNA evolution through mitonuclear epistasis. The changes in male and female reproductive fitness were both aligned with changes in mtDNA haplotype frequencies, suggesting that natural selection on mtDNA is sexually concordant in stressful thermal environments. We discuss the implications of our findings for the evolution of mtDNA.
Collapse
Affiliation(s)
- Elina Immonen
- Department of Ecology and Evolution/Evolutionary BiologyUppsala UniversityUppsalaSweden
| | - David Berger
- Department of Ecology and Evolution/Animal EcologyUppsala UniversityUppsalaSweden
| | - Ahmed Sayadi
- Department of Ecology and Evolution/Animal EcologyUppsala UniversityUppsalaSweden
| | | | - Göran Arnqvist
- Department of Ecology and Evolution/Animal EcologyUppsala UniversityUppsalaSweden
| |
Collapse
|
11
|
Kurbalija Novičić Z, Sayadi A, Jelić M, Arnqvist G. Negative frequency dependent selection contributes to the maintenance of a global polymorphism in mitochondrial DNA. BMC Evol Biol 2020; 20:20. [PMID: 32019493 PMCID: PMC7001298 DOI: 10.1186/s12862-020-1581-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 01/13/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Understanding the forces that maintain diversity across a range of scales is at the very heart of biology. Frequency-dependent processes are generally recognized as the most central process for the maintenance of ecological diversity. The same is, however, not generally true for genetic diversity. Negative frequency dependent selection, where rare genotypes have an advantage, is often regarded as a relatively weak force in maintaining genetic variation in life history traits because recombination disassociates alleles across many genes. Yet, many regions of the genome show low rates of recombination and genetic variation in such regions (i.e., supergenes) may in theory be upheld by frequency dependent selection. RESULTS We studied what is essentially a ubiquitous life history supergene (i.e., mitochondrial DNA) in the fruit fly Drosophila subobscura, showing sympatric polymorphism with two main mtDNA genotypes co-occurring in populations world-wide. Using an experimental evolution approach involving manipulations of genotype starting frequencies, we show that negative frequency dependent selection indeed acts to maintain genetic variation in this region. Moreover, the strength of selection was affected by food resource conditions. CONCLUSIONS Our work provides novel experimental support for the view that balancing selection through negative frequency dependency acts to maintain genetic variation in life history genes. We suggest that the emergence of negative frequency dependent selection on mtDNA is symptomatic of the fundamental link between ecological processes related to resource use and the maintenance of genetic variation.
Collapse
Affiliation(s)
- Zorana Kurbalija Novičić
- Animal Ecology, Department of Ecology and Genetics, Evolutionary Biology Center, Uppsala University, Norbyvägen 18D, SE-752 36, Uppsala, Sweden.,Department of Neuroscience, Psychiatry, Uppsala University Hospital, Entrance 10, 751 85, Uppsala, Sweden
| | - Ahmed Sayadi
- Animal Ecology, Department of Ecology and Genetics, Evolutionary Biology Center, Uppsala University, Norbyvägen 18D, SE-752 36, Uppsala, Sweden
| | - Mihailo Jelić
- Faculty of Biology, University of Belgrade, Studentski trg 16, Belgrade, 11000, Serbia
| | - Göran Arnqvist
- Animal Ecology, Department of Ecology and Genetics, Evolutionary Biology Center, Uppsala University, Norbyvägen 18D, SE-752 36, Uppsala, Sweden.
| |
Collapse
|
12
|
Sayadi A, Martinez Barrio A, Immonen E, Dainat J, Berger D, Tellgren-Roth C, Nystedt B, Arnqvist G. The genomic footprint of sexual conflict. Nat Ecol Evol 2019; 3:1725-1730. [DOI: 10.1038/s41559-019-1041-9] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Accepted: 10/15/2019] [Indexed: 12/28/2022]
Abstract
AbstractGenes with sex-biased expression show a number of unique properties and this has been seen as evidence for conflicting selection pressures in males and females, forming a genetic ‘tug-of-war’ between the sexes. However, we lack studies of taxa where an understanding of conflicting phenotypic selection in the sexes has been linked with studies of genomic signatures of sexual conflict. Here, we provide such a link. We used an insect where sexual conflict is unusually well understood, the seed beetle Callosobruchus maculatus, to test for molecular genetic signals of sexual conflict across genes with varying degrees of sex-bias in expression. We sequenced, assembled and annotated its genome and performed population resequencing of three divergent populations. Sex-biased genes showed increased levels of genetic diversity and bore a remarkably clear footprint of relaxed purifying selection. Yet, segregating genetic variation was also affected by balancing selection in weakly female-biased genes, while male-biased genes showed signs of overall purifying selection. Female-biased genes contributed disproportionally to shared polymorphism across populations, while male-biased genes, male seminal fluid protein genes and sex-linked genes did not. Genes showing genomic signatures consistent with sexual conflict generally matched life-history phenotypes known to experience sexually antagonistic selection in this species. Our results highlight metabolic and reproductive processes, confirming the key role of general life-history traits in sexual conflict.
Collapse
|
13
|
Martinossi‐Allibert I, Thilliez E, Arnqvist G, Berger D. Sexual selection, environmental robustness, and evolutionary demography of maladapted populations: A test using experimental evolution in seed beetles. Evol Appl 2019; 12:1371-1384. [PMID: 31417621 PMCID: PMC6691221 DOI: 10.1111/eva.12758] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 11/19/2018] [Accepted: 12/09/2018] [Indexed: 01/01/2023] Open
Abstract
Whether sexual selection impedes or aids adaptation has become an outstanding question in times of rapid environmental change and parallels the debate about how the evolution of individual traits impacts on population dynamics. The net effect of sexual selection on population viability results from a balance between genetic benefits of "good-genes" effects and costs of sexual conflict. Depending on how these facets of sexual selection are affected under environmental change, extinction of maladapted populations could be either avoided or accelerated. Here, we evolved seed beetles under three alternative mating regimes to disentangle the contributions of sexual selection, fecundity selection, and male-female coevolution to individual reproductive success and population fitness. We compared these contributions between the ancestral environment and two stressful environments (elevated temperature and a host plant shift). We found evidence that sexual selection on males had positive genetic effects on female fitness components across environments, supporting good-genes sexual selection. Interestingly, however, when males evolved under sexual selection with fecundity selection removed, they became more robust to both temperature and host plant stress compared to their conspecific females and males from the other evolution regimes that applied fecundity selection. We quantified the population-level consequences of this sex-specific adaptation and found evidence that the cost of sociosexual interactions in terms of reduced offspring production was higher in the regime applying only sexual selection to males. Moreover, the cost tended to be more pronounced at the elevated temperature to which males from the regime were more robust compared to their conspecific females. These results illustrate the tension between individual-level adaptation and population-level viability in sexually reproducing species and suggest that the relative efficacies of sexual selection and fecundity selection can cause inherent sex differences in environmental robustness that may impact demography of maladapted populations.
Collapse
Affiliation(s)
| | - Emma Thilliez
- Department of Ecology and Genetics, Animal EcologyUppsala UniversityUppsalaSweden
| | - Göran Arnqvist
- Department of Ecology and Genetics, Animal EcologyUppsala UniversityUppsalaSweden
| | - David Berger
- Department of Ecology and Genetics, Animal EcologyUppsala UniversityUppsalaSweden
| |
Collapse
|
14
|
Martinossi-Allibert I, Rueffler C, Arnqvist G, Berger D. The efficacy of good genes sexual selection under environmental change. Proc Biol Sci 2019; 286:20182313. [PMID: 30963930 PMCID: PMC6408614 DOI: 10.1098/rspb.2018.2313] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 01/10/2019] [Indexed: 11/12/2022] Open
Abstract
Sexual selection can promote adaptation if sexually selected traits are reliable indicators of genetic quality. Moreover, models of good genes sexual selection suggest that, by operating more strongly in males than in females, sexual selection may purge deleterious alleles from the population at a low demographic cost, offering an evolutionary benefit to sexually reproducing populations. Here, we investigate the effect of good genes sexual selection on adaptation following environmental change. We show that the strength of sexual selection is often weakened relative to fecundity selection, reducing the suggested benefit of sexual reproduction. This result is a consequence of incorporating a simple and general mechanistic basis for how sexual selection operates under different mating systems, rendering selection on males frequency-dependent and dynamic with respect to the degree of environmental change. Our model illustrates that incorporating the mechanism of selection is necessary to predict evolutionary outcomes and highlights the need to substantiate previous theoretical claims with further work on how sexual selection operates in changing environments.
Collapse
|
15
|
Bayram H, Sayadi A, Immonen E, Arnqvist G. Identification of novel ejaculate proteins in a seed beetle and division of labour across male accessory reproductive glands. Insect Biochem Mol Biol 2019; 104:50-57. [PMID: 30529580 DOI: 10.1016/j.ibmb.2018.12.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 12/04/2018] [Accepted: 12/06/2018] [Indexed: 06/09/2023]
Abstract
The male ejaculate contains a multitude of seminal fluid proteins (SFPs), many of which are key reproductive molecules, as well as sperm. However, the identification of SFPs is notoriously difficult and a detailed understanding of this complex phenotype has only been achieved in a few model species. We employed a recently developed proteomic method involving whole-organism stable isotope labelling coupled with proteomic and transcriptomic analyses to characterize ejaculate proteins in the seed beetle Callosobruchus maculatus. We identified 317 proteins that were transferred to females at mating, and a great majority of these showed signals of secretion and were highly male-biased in expression in the abdomen. These male-derived proteins were enriched with proteins involved in general metabolic and catabolic processes but also with proteolytic enzymes and proteins involved in protection against oxidative stress. Thirty-seven proteins showed significant homology with SFPs previously identified in other insects. However, no less than 92 C. maculatus ejaculate proteins were entirely novel, receiving no significant blast hits and lacking homologs in extant data bases, consistent with a rapid and divergent evolution of SFPs. We used 3D micro-tomography in conjunction with proteomic methods to identify 5 distinct pairs of male accessory reproductive glands and to show that certain ejaculate proteins were only recovered in certain male glands. Finally, we provide a tentative list of 231 candidate female-derived reproductive proteins, some of which are likely important in ejaculate processing and/or sperm storage.
Collapse
Affiliation(s)
- Helen Bayram
- Department of Ecology and Genetics, Animal Ecology, Uppsala University, Norbyvägen 18D, SE-752 36, Uppsala, Sweden
| | - Ahmed Sayadi
- Department of Ecology and Genetics, Animal Ecology, Uppsala University, Norbyvägen 18D, SE-752 36, Uppsala, Sweden
| | - Elina Immonen
- Department of Ecology and Genetics, Evolutionary Biology, Uppsala University, Norbyvägen 18D, SE-752 36, Uppsala, Sweden
| | - Göran Arnqvist
- Department of Ecology and Genetics, Animal Ecology, Uppsala University, Norbyvägen 18D, SE-752 36, Uppsala, Sweden.
| |
Collapse
|
16
|
Abstract
The maintenance of genetic variance in fitness represents one of the most longstanding enigmas in evolutionary biology. Sexually antagonistic (SA) selection may contribute substantially to maintaining genetic variance in fitness by maintaining alternative alleles with opposite fitness effects in the two sexes. This is especially likely if such SA loci exhibit sex-specific dominance reversal (SSDR)-wherein the allele that benefits a given sex is also dominant in that sex-which would generate balancing selection and maintain stable SA polymorphisms for fitness. However, direct empirical tests of SSDR for fitness are currently lacking. Here, we performed a full diallel cross among isogenic strains derived from a natural population of the seed beetle Callosobruchus maculatus that is known to exhibit SA genetic variance in fitness. We measured sex-specific competitive lifetime reproductive success (i.e., fitness) in >500 sex-by-genotype F1 combinations and found that segregating genetic variation in fitness exhibited pronounced contributions from dominance variance and sex-specific dominance variance. A closer inspection of the nature of dominance variance revealed that the fixed allelic variation captured within each strain tended to be dominant in one sex but recessive in the other, revealing genome-wide SSDR for SA polymorphisms underlying fitness. Our findings suggest that SA balancing selection could play an underappreciated role in maintaining fitness variance in natural populations.
Collapse
Affiliation(s)
- Karl Grieshop
- Department of Ecology and Genetics, Animal Ecology, Uppsala University, Uppsala, Sweden
- * E-mail:
| | - Göran Arnqvist
- Department of Ecology and Genetics, Animal Ecology, Uppsala University, Uppsala, Sweden
| |
Collapse
|
17
|
Berger D, Stångberg J, Grieshop K, Martinossi-Allibert I, Arnqvist G. Temperature effects on life-history trade-offs, germline maintenance and mutation rate under simulated climate warming. Proc Biol Sci 2018; 284:rspb.2017.1721. [PMID: 29118134 DOI: 10.1098/rspb.2017.1721] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Accepted: 10/06/2017] [Indexed: 01/28/2023] Open
Abstract
Mutation has a fundamental influence over evolutionary processes, but how evolutionary processes shape mutation rate remains less clear. In asexual unicellular organism, increased mutation rates have been observed in stressful environments and the reigning paradigm ascribes this increase to selection for evolvability. However, this explanation does not apply in sexually reproducing species, where little is known about how the environment affects mutation rate. Here we challenged experimental lines of seed beetle, evolved at ancestral temperature or under simulated climate warming, to repair induced mutations at ancestral and stressful temperature. Results show that temperature stress causes individuals to pass on a greater mutation load to their grand-offspring. This suggests that stress-induced mutation rates, in unicellular and multicellular organisms alike, can result from compromised germline DNA repair in low condition individuals. Moreover, lines adapted to simulated climate warming had evolved increased longevity at the cost of reproduction, and this allocation decision improved germline repair. These results suggest that mutation rates can be modulated by resource allocation trade-offs encompassing life-history traits and the germline and have important implications for rates of adaptation and extinction as well as our understanding of genetic diversity in multicellular organisms.
Collapse
Affiliation(s)
- David Berger
- Department of Ecology and Genetics, Animal Ecology, Uppsala University, Uppsala, Sweden
| | - Josefine Stångberg
- Department of Ecology and Genetics, Animal Ecology, Uppsala University, Uppsala, Sweden
| | - Karl Grieshop
- Department of Ecology and Genetics, Animal Ecology, Uppsala University, Uppsala, Sweden
| | | | - Göran Arnqvist
- Department of Ecology and Genetics, Animal Ecology, Uppsala University, Uppsala, Sweden
| |
Collapse
|
18
|
Martinossi-Allibert I, Savković U, Đorđević M, Arnqvist G, Stojković B, Berger D. The consequences of sexual selection in well-adapted and maladapted populations of bean beetles†. Evolution 2018; 72:518-530. [DOI: 10.1111/evo.13412] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 11/24/2017] [Accepted: 12/03/2017] [Indexed: 12/12/2022]
Affiliation(s)
| | - Uroš Savković
- Department of Evolutionary Biology; Institute for Biological Research “Siniša Stanković; ” University of Belgrade; Bulevar despota Stefana 142 Belgrade 11060 Serbia
| | - Mirko Đorđević
- Department of Evolutionary Biology; Institute for Biological Research “Siniša Stanković; ” University of Belgrade; Bulevar despota Stefana 142 Belgrade 11060 Serbia
| | - Göran Arnqvist
- Department of Ecology and Genetics, Evolutionary Biology Centre; Uppsala University; Sweden
| | - Biljana Stojković
- Department of Evolutionary Biology; Institute for Biological Research “Siniša Stanković; ” University of Belgrade; Bulevar despota Stefana 142 Belgrade 11060 Serbia
- Institute of Zoology, Faculty of Biology; University of Belgrade; Studentskitrg 16 Belgrade 11000 Serbia
| | - David Berger
- Department of Ecology and Genetics, Evolutionary Biology Centre; Uppsala University; Sweden
| |
Collapse
|
19
|
Ostersetzer-Biran O, Lane N, Pomiankowski A, Burton R, Arnqvist G, Filipovska A, Huchon D, Mishmar D. The First Mitochondrial Genomics and Evolution SMBE-Satellite Meeting: A New Scientific Symbiosis. Genome Biol Evol 2017; 9:3054-3058. [PMID: 29106528 PMCID: PMC5714122 DOI: 10.1093/gbe/evx227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/01/2017] [Indexed: 11/12/2022] Open
Abstract
The central role of the mitochondrion for cellular and organismal metabolism is well known, yet its functional role in evolution has rarely been featured in leading international conferences. Moreover, the contribution of mitochondrial genetics to complex disease phenotypes is particularly important, and although major advances have been made in the field of genomics, mitochondrial genomic data have in many cases been overlooked. Accumulating data and new knowledge support a major contribution of this maternally inherited genome, and its interactions with the nucleus, to both major evolutionary processes and diverse disease phenotypes. These advances encouraged us to assemble the first Mitochondrial Genomics and Evolution (MGE) meeting-an SMBE satellite and Israeli Science foundation international conference (Israel, September 2017). Here, we report the content and outcome of the MGE meeting (https://www.mge2017.com/; last accessed November 5, 2017).
Collapse
Affiliation(s)
| | - Nick Lane
- Department of Genetics, Evolution and Environment, University College London, United Kingdom
| | - Andrew Pomiankowski
- Department of Genetics, Evolution and Environment, University College London, United Kingdom
| | - Ron Burton
- Marine Biology Research Division, Scripps Institution of Oceanography, University of California, San Diego
| | - Göran Arnqvist
- Department of Ecology and Genetics, University of Uppsala, Sweden
| | - Aleksandra Filipovska
- School of Molecular Sciences and The Harry Perkins Institute of Medical Research, The University of Western Australia, Australia
| | - Dorothée Huchon
- Department of Zoology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Israel.,The Steinhardt Museum of Natural History and Israel National Center for Biodiversity Studies, Tel Aviv, Israel
| | - Dan Mishmar
- Department of Life Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| |
Collapse
|
20
|
Immonen E, Sayadi A, Bayram H, Arnqvist G. Mating Changes Sexually Dimorphic Gene Expression in the Seed Beetle Callosobruchus maculatus. Genome Biol Evol 2017; 9:677-699. [PMID: 28391318 PMCID: PMC5381559 DOI: 10.1093/gbe/evx029] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/20/2017] [Indexed: 12/11/2022] Open
Abstract
Sexually dimorphic phenotypes arise largely from sex-specific gene expression, which has mainly been characterized in sexually naïve adults. However, we expect sexual dimorphism in transcription to be dynamic and dependent on factors such as reproductive status. Mating induces many behavioral and physiological changes distinct to each sex and is therefore expected to activate regulatory changes in many sex-biased genes. Here, we first characterized sexual dimorphism in gene expression in Callosobruchus maculatus seed beetles. We then examined how females and males respond to mating and how it affects sex-biased expression, both in sex-limited (abdomen) and sex-shared (head and thorax) tissues. Mating responses were largely sex-specific and, as expected, females showed more genes responding compared with males (∼2,000 vs. ∼300 genes in the abdomen, ∼500 vs. ∼400 in the head and thorax, respectively). Of the sex-biased genes present in virgins, 16% (1,041 genes) in the abdomen and 17% (243 genes) in the head and thorax altered their relative expression between the sexes as a result of mating. Sex-bias status changed in 2% of the genes in the abdomen and 4% in the head and thorax following mating. Mating responses involved de-feminization of females and, to a lesser extent, de-masculinization of males relative to their virgin state: mating decreased rather than increased dimorphic expression of sex-biased genes. The fact that regulatory changes of both types of sex-biased genes occurred in both sexes suggests that male- and female-specific selection is not restricted to male- and female-biased genes, respectively, as is sometimes assumed.
Collapse
Affiliation(s)
- Elina Immonen
- Department of Ecology and Genetics, Evolutionary Biology Centre (Animal Ecology), Uppsala University, Uppsala
| | - Ahmed Sayadi
- Department of Ecology and Genetics, Evolutionary Biology Centre (Animal Ecology), Uppsala University, Uppsala
| | - Helen Bayram
- Department of Ecology and Genetics, Evolutionary Biology Centre (Animal Ecology), Uppsala University, Uppsala
| | - Göran Arnqvist
- Department of Ecology and Genetics, Evolutionary Biology Centre (Animal Ecology), Uppsala University, Uppsala
| |
Collapse
|
21
|
Abstract
Animal mitogenomes are generally thought of as being economic and optimized for rapid replication and transcription. We use long-read sequencing technology to assemble the remarkable mitogenomes of four species of seed beetles. These are the largest circular mitogenomes ever assembled in insects, ranging from 24,496 to 26,613 bp in total length, and are exceptional in that some 40% consists of non-coding DNA. The size expansion is due to two very long intergenic spacers (LIGSs), rich in tandem repeats. The two LIGSs are present in all species but vary greatly in length (114-10,408 bp), show very low sequence similarity, divergent tandem repeat motifs, a very high AT content and concerted length evolution. The LIGSs have been retained for at least some 45 my but must have undergone repeated reductions and expansions, despite strong purifying selection on protein coding mtDNA genes. The LIGSs are located in two intergenic sites where a few recent studies of insects have also reported shorter LIGSs (>200 bp). These sites may represent spaces that tolerate neutral repeat array expansions or, alternatively, the LIGSs may function to allow a more economic translational machinery. Mitochondrial respiration in adult seed beetles is based almost exclusively on fatty acids, which reduces the need for building complex I of the oxidative phosphorylation pathway (NADH dehydrogenase). One possibility is thus that the LIGSs may allow depressed transcription of NAD genes. RNA sequencing showed that LIGSs are partly transcribed and transcriptional profiling suggested that all seven mtDNA NAD genes indeed show low levels of transcription and co-regulation of transcription across sexes and tissues.
Collapse
Affiliation(s)
- Ahmed Sayadi
- Animal Ecology, Department of Ecology and Genetics, Evolutionary Biology Centre, Uppsala University, Sweden
| | - Elina Immonen
- Animal Ecology, Department of Ecology and Genetics, Evolutionary Biology Centre, Uppsala University, Sweden
| | - Christian Tellgren-Roth
- National Genomics Infrastructure, Science for Life Laboratory, Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - Göran Arnqvist
- Animal Ecology, Department of Ecology and Genetics, Evolutionary Biology Centre, Uppsala University, Sweden
| |
Collapse
|
22
|
Booksmythe I, Rundle HD, Arnqvist G. Sexual dimorphism in epicuticular compounds despite similar sexual selection in sex role-reversed seed beetles. J Evol Biol 2017; 30:2005-2016. [DOI: 10.1111/jeb.13171] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Revised: 07/28/2017] [Accepted: 08/20/2017] [Indexed: 01/06/2023]
Affiliation(s)
- I. Booksmythe
- Department of Evolutionary Biology and Environmental Studies; University of Zurich; Zurich Switzerland
| | - H. D. Rundle
- Department of Biology; University of Ottawa; Ottawa ON Canada
| | - G. Arnqvist
- Department of Animal Ecology; Evolutionary Biology Centre; Uppsala University; Uppsala Sweden
| |
Collapse
|
23
|
Affiliation(s)
- Göran Arnqvist
- Animal EcologyDepartment of Ecology and GeneticsEvolutionary Biology CentreUppsala University Uppsala Sweden
| | - Biljana Stojković
- Department of Evolutionary BiologyInstitute for Biological ResearchUniversity of Belgrade Belgrade Serbia
- Institute of ZoologyFaculty of BiologyUniversity of Belgrade Belgrade Serbia
| | - Johanna L. Rönn
- Animal EcologyDepartment of Ecology and GeneticsEvolutionary Biology CentreUppsala University Uppsala Sweden
| | - Elina Immonen
- Animal EcologyDepartment of Ecology and GeneticsEvolutionary Biology CentreUppsala University Uppsala Sweden
| |
Collapse
|
24
|
Abstract
Insect genitalia exhibit rapid divergent evolution. Truly extraordinary structures have evolved in some groups, presumably as a result of postmating sexual selection. To increase our understanding of this phenomenon, we studied the function of one such structure. The male genitalia of Callosobruchus subinnotatus (Coleoptera: Bruchinae) contain a pair of jaw-like structures with unknown function. Here, we used phenotypic engineering to ablate the teeth on these jaws. We then experimentally assessed the effects of ablation of the genital jaws on mating duration, ejaculate weight, male fertilization success and female fecundity, using a double-mating experimental design. We predicted that copulatory wounding in females should be positively related to male fertilization success; however, we found no significant correlation between genital tract scarring in females and male fertilization success. Male fertilization success was, however, positively related to the amount of ejaculate transferred by males and negatively related to female ejaculate dumping. Ablation of male genital jaws did not affect male relative fertilization success but resulted in a reduction in female egg production. Our results suggest that postmating sexual selection in males indeed favors these genital jaws, not primarily through an elevated relative success in sperm competition but by increasing female egg production. Summary: A toothed jaw-like structure on the male genitalia of the seed beetle Callosobruchus subinnotatus increases female egg production after mating.
Collapse
Affiliation(s)
- Merel M Van Haren
- Department of Ecology and Genetics, Animal Ecology, Evolutionsbiologiskt Centrum EBC, Norbyvägen 18 D, SE-752 36 Uppsala, Uppsala University, Sweden .,Naturalis Biodiversity Center, Vondellaan 55, 2332 AA Leiden, Leiden University, Leiden, The Netherlands
| | - Johanna Liljestrand Rönn
- Department of Ecology and Genetics, Animal Ecology, Evolutionsbiologiskt Centrum EBC, Norbyvägen 18 D, SE-752 36 Uppsala, Uppsala University, Sweden
| | - Menno Schilthuizen
- Naturalis Biodiversity Center, Vondellaan 55, 2332 AA Leiden, Leiden University, Leiden, The Netherlands
| | - Göran Arnqvist
- Department of Ecology and Genetics, Animal Ecology, Evolutionsbiologiskt Centrum EBC, Norbyvägen 18 D, SE-752 36 Uppsala, Uppsala University, Sweden
| |
Collapse
|
25
|
Grieshop K, Berger D, Arnqvist G. Male-benefit sexually antagonistic genotypes show elevated vulnerability to inbreeding. BMC Evol Biol 2017; 17:134. [PMID: 28606137 PMCID: PMC5469140 DOI: 10.1186/s12862-017-0981-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Accepted: 05/25/2017] [Indexed: 12/26/2022] Open
Abstract
Background There is theoretical and empirical evidence for strong sexual selection in males having positive effects on population viability by serving to purify the genome of its mutation load at a low demographic cost. However, there is also theoretical and empirical evidence for negative effects of sexual selection on female fitness, and therefore population viability, known as the gender load. This can take the form of sexually antagonistic (SA) genetic variation where alleles with a selective advantage in males pose a detriment to female fitness, and vice versa. Here, using seed beetles, we shed light on a previously unexplored manifestation of the gender load: the effect of SA genetic variation on tolerance to inbreeding. Results We found that genotypes encoding high male, but low female fitness exhibited significantly greater rates of extinction upon enforced inbreeding relative to genotypes encoding high female but low male fitness. Also, genotypes encoding low fitness in both sexes exhibited greater rates of extinction relative to generally high-fitness genotypes (though marginally non-significant), an expected finding attributable to variation in mutation load across genotypes. Despite follow-up investigations aiming to identify the mechanism(s) underlying these findings, it remains unclear whether the gender load and the mutation load have independent consequences for tolerance to inbreeding, or whether these two types of genetic architecture interact epistatically to render male-benefit genetic variation relatively intolerant to inbreeding. Conclusions Regardless of the underlying mechanism(s), our results show that male-benefit/female-detriment SA genetic variation poses a previously unseen detriment to population viability due to its elevated vulnerability to inbreeding/homozygosity. This suggests that sexual selection in the context of SA genetic variance for fitness may enhance the gender load on population viability more than previously appreciated, due to selecting for male-benefit SA genetic variation that engenders lineages to extinction upon inbreeding. We note that our results imply that SA alleles that are sexually selected for in males may be underrepresented or even lacking in panels of inbred lines. Electronic supplementary material The online version of this article (doi:10.1186/s12862-017-0981-4) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Karl Grieshop
- Department of Ecology and Genetics, Animal Ecology, Uppsala University, Norbyvägen 18D, 752 36, Uppsala, Sweden.
| | - David Berger
- Department of Ecology and Genetics, Animal Ecology, Uppsala University, Norbyvägen 18D, 752 36, Uppsala, Sweden
| | - Göran Arnqvist
- Department of Ecology and Genetics, Animal Ecology, Uppsala University, Norbyvägen 18D, 752 36, Uppsala, Sweden
| |
Collapse
|
26
|
Arnqvist G. SPATIAL VARIATION IN SELECTIVE REGIMES: SEXUAL SELECTION IN THE WATER STRIDER, GERRIS ODONTOGASTER. Evolution 2017; 46:914-929. [PMID: 28564413 DOI: 10.1111/j.1558-5646.1992.tb00609.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/1991] [Accepted: 11/18/1991] [Indexed: 11/30/2022]
Abstract
Studies of phenotypic selection in natural populations are often concerned with simply detecting selection. In adopting a more mechanistic approach, this study compares the sexual selection regimes in natural populations of the water strider Gerris odontogaster with a priori predictions of selection, based on a number of previous field and laboratory studies of the behavioral mechanisms of selection. In this species, a general reluctance of females to mate allows for intersexual selection for ability to subdue reluctant females in males. Female reluctance to mate has been shown to decrease with increasing population density, suggesting that sexual selection should be weaker in high density populations. Three different populations with large differences in population density were studied. A number of traits including parasite load, body mass, body size and male abdominal process length were found to experience significant sexual selection. The investigated populations differed considerably with regard to the total strength of selection on the measured traits and the form of selection on single traits. In general, males in the population with the highest density experienced the weakest selection for grasping ability. This pattern is ascribed to density-related alterations of female mating behavior. Selection for male grasping ability, as reflected by selection on male abdominal process length, is reduced in high-density populations where reluctant females are more easily subdued. Further, the studied populations differed significantly in mean phenotype and phenotypic variance for male abdominal process length. It is suggested that interpopulational differences in selective regimes may generate local adaptations with respect to male abdominal process length, and that gene flow may contribute to the maintenance of the high genetic variation in this trait. It is further suggested that more empirical effort should be made in quantifying and understanding spatial and temporal variation in selection in natural populations, since this may provide information on the prevalence of local adaptations in metric traits and on the mechanisms of selection.
Collapse
Affiliation(s)
- Göran Arnqvist
- Department of Animal Ecology, University of Umeå, S-901 87 Umeå, SWEDEN
| |
Collapse
|
27
|
Dougherty LR, van Lieshout E, McNamara KB, Moschilla JA, Arnqvist G, Simmons LW. Sexual conflict and correlated evolution between male persistence and female resistance traits in the seed beetle Callosobruchus maculatus. Proc Biol Sci 2017; 284:20170132. [PMID: 28539510 PMCID: PMC5454259 DOI: 10.1098/rspb.2017.0132] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Accepted: 04/25/2017] [Indexed: 11/12/2022] Open
Abstract
Traumatic mating (or copulatory wounding) is an extreme form of sexual conflict whereby male genitalia physically harm females during mating. In such species females are expected to evolve counter-adaptations to reduce male-induced harm. Importantly, female counter-adaptations may include both genital and non-genital traits. In this study, we examine evolutionary associations between harmful male genital morphology and female reproductive tract morphology and immune function across 13 populations of the seed beetle Callosobruchus maculatus We detected positive correlated evolution between the injuriousness of male genitalia and putative female resistance adaptations across populations. Moreover, we found evidence for a negative relationship between female immunity and population productivity, which suggests that investment in female resistance may be costly due to the resource trade-offs that are predicted between immunity and reproduction. Finally, the degree of female tract scarring (harm to females) was greater in those populations with both longer aedeagal spines and a thinner female tract lining. Our results are thus consistent with a sexual arms race, which is only apparent when both male and female traits are taken into account. Importantly, our study provides rare evidence for sexually antagonistic coevolution of male and female traits at the within-species level.
Collapse
Affiliation(s)
- Liam R Dougherty
- School of Biological Sciences, Centre for Evolutionary Biology, University of Western Australia, Crawley, WA 6009, Australia
| | - Emile van Lieshout
- School of Biological Sciences, Centre for Evolutionary Biology, University of Western Australia, Crawley, WA 6009, Australia
| | - Kathryn B McNamara
- School of Biological Sciences, Centre for Evolutionary Biology, University of Western Australia, Crawley, WA 6009, Australia
| | - Joe A Moschilla
- School of Biological Sciences, Centre for Evolutionary Biology, University of Western Australia, Crawley, WA 6009, Australia
| | - Göran Arnqvist
- Animal Ecology, Department of Ecology and Genetics, Uppsala University, Norbyvägen 18D, Uppsala 75236, Sweden
| | - Leigh W Simmons
- School of Biological Sciences, Centre for Evolutionary Biology, University of Western Australia, Crawley, WA 6009, Australia
| |
Collapse
|
28
|
Arnqvist G, Danielsson I. COPULATORY BEHAVIOR, GENITAL MORPHOLOGY, AND MALE FERTILIZATION SUCCESS IN WATER STRIDERS. Evolution 2017; 53:147-156. [DOI: 10.1111/j.1558-5646.1999.tb05340.x] [Citation(s) in RCA: 102] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/1998] [Accepted: 10/07/1998] [Indexed: 11/29/2022]
Affiliation(s)
- Göran Arnqvist
- Department of Animal Ecology; University of Umeå; SE-901 87 Umeå Sweden
| | - Ingela Danielsson
- Animal Ecology, Department of Zoology; Göteborg University; Box 463, SE-405 30 Göteborg Sweden
| |
Collapse
|
29
|
Bayram H, Sayadi A, Goenaga J, Immonen E, Arnqvist G. Novel seminal fluid proteins in the seed beetle Callosobruchus maculatus identified by a proteomic and transcriptomic approach. Insect Mol Biol 2017; 26:58-73. [PMID: 27779332 DOI: 10.1111/imb.12271] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The seed beetle Callosobruchus maculatus is a significant agricultural pest and increasingly studied model of sexual conflict. Males possess genital spines that increase the transfer of seminal fluid proteins (SFPs) into the female body. As SFPs alter female behaviour and physiology, they are likely to modulate reproduction and sexual conflict in this species. Here, we identified SFPs using proteomics combined with a de novo transcriptome. A prior 2D-sodium dodecyl sulphate polyacrylamide gel electrophoresis analysis identified male accessory gland protein spots that were probably transferred to the female at mating. Proteomic analysis of these spots identified 98 proteins, a majority of which were also present within ejaculates collected from females. Standard annotation workflows revealed common functional groups for SFPs, including proteases and metabolic proteins. Transcriptomic analysis found 84 transcripts differentially expressed between the sexes. Notably, genes encoding 15 proteins were highly expressed in male abdomens and only negligibly expressed within females. Most of these sequences corresponded to 'unknown' proteins (nine of 15) and may represent rapidly evolving SFPs novel to seed beetles. Our combined analyses highlight 44 proteins for which there is strong evidence that they are SFPs. These results can inform further investigation, to better understand the molecular mechanisms of sexual conflict in seed beetles.
Collapse
Affiliation(s)
- H Bayram
- Department of Ecology and Genetics, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden
| | - A Sayadi
- Department of Ecology and Genetics, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden
| | - J Goenaga
- Department of Ecology and Genetics, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden
| | - E Immonen
- Department of Ecology and Genetics, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden
| | - G Arnqvist
- Department of Ecology and Genetics, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden
| |
Collapse
|
30
|
Arnqvist G, Novičić ZK, Castro JA, Sayadi A. Negative frequency dependent selection on sympatric mtDNA haplotypes in Drosophila subobscura. Hereditas 2016; 153:15. [PMID: 28096777 PMCID: PMC5226107 DOI: 10.1186/s41065-016-0020-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Accepted: 11/11/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Recent experimental evidence for selection on mitochondrial DNA (mtDNA) has prompted the question as to what processes act to maintain within-population variation in mtDNA. Balancing selection though negative frequency dependent selection (NFDS) among sympatric haplotypes is a possibility, but direct empirical evidence for this is very scarce. FINDINGS We extend the previous findings of a multi-generation replicated cage experiment in Drosophila subobscura, where mtDNA polymorphism was maintained in a laboratory setting. First, we use a set of Monte Carlo simulations to show that the haplotype frequency dynamics observed are inconsistent with genetic drift alone and most closely match those expected under NFDS. Second, we show that haplotype frequency changes over time were significantly different from those expected under either genetic drift or positive selection but were consistent with those expected under NFSD. CONCLUSIONS Collectively, our analyses provide novel support for NFDS on mtDNA haplotypes, suggesting that mtDNA polymorphism may at least in part be maintained by balancing selection also in natural populations. We very briefly discuss the possible mechanisms that might be involved.
Collapse
Affiliation(s)
- Göran Arnqvist
- Department of Ecology and Genetics, Animal Ecology, University of Uppsala, Norbyv 18D, SE75236 Uppsala, Sweden
| | - Zorana Kurbalija Novičić
- Department of Ecology and Genetics, Animal Ecology, University of Uppsala, Norbyv 18D, SE75236 Uppsala, Sweden ; Institute for Biological Research "Siniša Stanković", University of Belgrade, Despot Stefan Blvd 142, 11000 Belgrade, Serbia
| | - José A Castro
- Laboratori de Genètica, Departament de Biologia, Facultat de Ciencies, Edifici Guillem Colom, Universitat de les Illes Balears, Campus de la UIB, Palma de Mallorca, Balears 07122 Spain
| | - Ahmed Sayadi
- Department of Ecology and Genetics, Animal Ecology, University of Uppsala, Norbyv 18D, SE75236 Uppsala, Sweden
| |
Collapse
|
31
|
Đorđević M, Stojković B, Savković U, Immonen E, Tucić N, Lazarević J, Arnqvist G. Sex-specific mitonuclear epistasis and the evolution of mitochondrial bioenergetics, ageing, and life history in seed beetles. Evolution 2016; 71:274-288. [PMID: 27861795 DOI: 10.1111/evo.13109] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Revised: 09/13/2016] [Accepted: 10/24/2016] [Indexed: 12/23/2022]
Abstract
The role of mitochondrial DNA for the evolution of life-history traits remains debated. We examined mitonuclear effects on the activity of the multisubunit complex of the electron transport chain (ETC) involved in oxidative phosphorylation (OXPHOS) across lines of the seed beetle Acanthoscelides obtectus selected for a short (E) or a long (L) life for more than >160 generations. We constructed and phenotyped mitonuclear introgression lines, which allowed us to assess the independent effects of the evolutionary history of the nuclear and the mitochondrial genome. The nuclear genome was responsible for the largest share of divergence seen in ageing. However, the mitochondrial genome also had sizeable effects, which were sex-specific and expressed primarily as epistatic interactions with the nuclear genome. The effects of mitonuclear disruption were largely consistent with mitonuclear coadaptation. Variation in ETC activity explained a large proportion of variance in ageing and life-history traits and this multivariate relationship differed somewhat between the sexes. In conclusion, mitonuclear epistasis has played an important role in the laboratory evolution of ETC complex activity, ageing, and life histories and these are closely associated. The mitonuclear architecture of evolved differences in life-history traits and mitochondrial bioenergetics was sex-specific.
Collapse
Affiliation(s)
- Mirko Đorđević
- Department of Evolutionary Biology, Institute for Biological Research, University of Belgrade, Despota Stefana Boulevard 142, Belgrade, 11060, Serbia
| | - Biljana Stojković
- Department of Evolutionary Biology, Institute for Biological Research, University of Belgrade, Despota Stefana Boulevard 142, Belgrade, 11060, Serbia.,Institute of Zoology, Faculty of Biology, University of Belgrade, Studentski trg 16, Belgrade, 11000, Serbia
| | - Uroš Savković
- Department of Evolutionary Biology, Institute for Biological Research, University of Belgrade, Despota Stefana Boulevard 142, Belgrade, 11060, Serbia
| | - Elina Immonen
- Animal Ecology, Department of Ecology and Genetics, Evolutionary Biology Centre, Uppsala University, Norbyvägen 18D, SE-752 36, Uppsala, Sweden
| | - Nikola Tucić
- Department of Evolutionary Biology, Institute for Biological Research, University of Belgrade, Despota Stefana Boulevard 142, Belgrade, 11060, Serbia
| | - Jelica Lazarević
- Department of Insect Physiology and Biochemistry, Institute for Biological Research, University of Belgrade, Despota Stefana Boulevard 142, Belgrade, 11060, Serbia
| | - Göran Arnqvist
- Animal Ecology, Department of Ecology and Genetics, Evolutionary Biology Centre, Uppsala University, Norbyvägen 18D, SE-752 36, Uppsala, Sweden
| |
Collapse
|
32
|
Martinossi-Allibert I, Arnqvist G, Berger D. Sex-specific selection under environmental stress in seed beetles. J Evol Biol 2016; 30:161-173. [DOI: 10.1111/jeb.12996] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Revised: 09/21/2016] [Accepted: 10/13/2016] [Indexed: 01/15/2023]
Affiliation(s)
| | - G. Arnqvist
- Department of Ecology and Genetics; Animal Ecology; Uppsala University; Uppsala Sweden
| | - D. Berger
- Department of Ecology and Genetics; Animal Ecology; Uppsala University; Uppsala Sweden
| |
Collapse
|
33
|
Stojković B, Sayadi A, Đorđević M, Jović J, Savković U, Arnqvist G. Divergent evolution of life span associated with mitochondrial DNA evolution. Evolution 2016; 71:160-166. [PMID: 27778315 DOI: 10.1111/evo.13102] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Revised: 10/18/2016] [Accepted: 10/20/2016] [Indexed: 01/03/2023]
Abstract
Mitochondria play a key role in ageing. The pursuit of genes that regulate variation in life span and ageing have shown that several nuclear-encoded mitochondrial genes are important. However, the role of mitochondrial encoded genes (mtDNA) is more controversial and our appreciation of the role of mtDNA for the evolution of life span is limited. We use replicated lines of seed beetles that have been artificially selected for long or short life for >190 generations, now showing dramatic phenotypic differences, to test for a possible role of mtDNA in the divergent evolution of ageing and life span. We show that these divergent selection regimes led to the evolution of significantly different mtDNA haplotype frequencies. Selection for a long life and late reproduction generated positive selection for one specific haplotype, which was fixed in most such lines. In contrast, selection for reproduction early in life led to both positive selection as well as negative frequency-dependent selection on two different haplotypes, which were both present in all such lines. Our findings suggest that the evolution of life span was in part mediated by mtDNA, providing support for the emerging general tenet that adaptive evolution of life-history syndromes may involve mtDNA.
Collapse
Affiliation(s)
- Biljana Stojković
- Institute of Zoology, Faculty of Biology, University of Belgrade, Studentski trg 16, 11000, Belgrade, Serbia.,Department of Evolutionary Biology, Institute for Biological Research "Siniša Stanković, University of Belgrade, Despota Stefana Boulevard 142, 11060, Belgrade, Serbia
| | - Ahmed Sayadi
- Animal Ecology, Department of Ecology and Genetics, Evolutionary Biology Centre, Uppsala University, Norbyvägen 18D, SE-752 36, Uppsala, Sweden
| | - Mirko Đorđević
- Department of Evolutionary Biology, Institute for Biological Research "Siniša Stanković, University of Belgrade, Despota Stefana Boulevard 142, 11060, Belgrade, Serbia
| | - Jelena Jović
- Department of Plant Pests, Institute for Plant Protection and Environment, Banatska 33, 11080, Zemun, Serbia
| | - Uroš Savković
- Animal Ecology, Department of Ecology and Genetics, Evolutionary Biology Centre, Uppsala University, Norbyvägen 18D, SE-752 36, Uppsala, Sweden
| | - Göran Arnqvist
- Department of Evolutionary Biology, Institute for Biological Research "Siniša Stanković, University of Belgrade, Despota Stefana Boulevard 142, 11060, Belgrade, Serbia
| |
Collapse
|
34
|
Berger D, Martinossi-Allibert I, Grieshop K, Lind MI, Maklakov AA, Arnqvist G. Intralocus Sexual Conflict and the Tragedy of the Commons in Seed Beetles. Am Nat 2016; 188:E98-E112. [DOI: 10.1086/687963] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
35
|
Fritzsche K, Booksmythe I, Arnqvist G. Sex Ratio Bias Leads to the Evolution of Sex Role Reversal in Honey Locust Beetles. Curr Biol 2016; 26:2522-2526. [PMID: 27593373 DOI: 10.1016/j.cub.2016.07.018] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Revised: 07/05/2016] [Accepted: 07/08/2016] [Indexed: 11/29/2022]
Abstract
The reversal of conventional sex roles was enigmatic to Darwin, who suggested that it may evolve when sex ratios are female biased [1]. Here we present direct evidence confirming Darwin's hypothesis. We investigated mating system evolution in a sex-role-reversed beetle (Megabruchidius dorsalis) using experimental evolution under manipulated sex ratios and food regimes. In female-biased populations, where reproductive competition among females was intensified, females evolved to be more attractive and the sex roles became more reversed. Interestingly, female-specific mating behavior evolved more rapidly than male-specific mating behavior. We show that sexual selection due to reproductive competition can be strong in females and can target much the same traits as in males of species with conventional mating systems. Our study highlights two central points: the role of ecology in directing sexual selection and the role that females play in mating system evolution.
Collapse
Affiliation(s)
- Karoline Fritzsche
- Department of Zoology, University of Graz, Universitätsplatz 2, 8010 Graz, Austria.
| | - Isobel Booksmythe
- Institute of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Göran Arnqvist
- Animal Ecology, Department of Ecology and Genetics, Evolutionary Biology Centre, Uppsala University, Norbyvägen 18D, 752 36 Uppsala, Sweden
| |
Collapse
|
36
|
Arnqvist G, Sayadi A, Immonen E, Hotzy C, Rankin D, Tuda M, Hjelmen CE, Johnston JS. Genome size correlates with reproductive fitness in seed beetles. Proc Biol Sci 2016; 282:rspb.2015.1421. [PMID: 26354938 DOI: 10.1098/rspb.2015.1421] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The ultimate cause of genome size (GS) evolution in eukaryotes remains a major and unresolved puzzle in evolutionary biology. Large-scale comparative studies have failed to find consistent correlations between GS and organismal properties, resulting in the 'C-value paradox'. Current hypotheses for the evolution of GS are based either on the balance between mutational events and drift or on natural selection acting upon standing genetic variation in GS. It is, however, currently very difficult to evaluate the role of selection because within-species studies that relate variation in life-history traits to variation in GS are very rare. Here, we report phylogenetic comparative analyses of GS evolution in seed beetles at two distinct taxonomic scales, which combines replicated estimation of GS with experimental assays of life-history traits and reproductive fitness. GS showed rapid and bidirectional evolution across species, but did not show correlated evolution with any of several indices of the relative importance of genetic drift. Within a single species, GS varied by 4-5% across populations and showed positive correlated evolution with independent estimates of male and female reproductive fitness. Collectively, the phylogenetic pattern of GS diversification across and within species in conjunction with the pattern of correlated evolution between GS and fitness provide novel support for the tenet that natural selection plays a key role in shaping GS evolution.
Collapse
Affiliation(s)
- Göran Arnqvist
- Animal Ecology, Department of Ecology and Genetics, Uppsala University, Norbyvägen 18D, Uppsala 75236, Sweden
| | - Ahmed Sayadi
- Animal Ecology, Department of Ecology and Genetics, Uppsala University, Norbyvägen 18D, Uppsala 75236, Sweden
| | - Elina Immonen
- Animal Ecology, Department of Ecology and Genetics, Uppsala University, Norbyvägen 18D, Uppsala 75236, Sweden
| | - Cosima Hotzy
- Evolutionary Biology, Department of Ecology and Genetics, Uppsala University, Norbyvägen 18D, Uppsala 75236, Sweden
| | - Daniel Rankin
- Institute of Evolutionary Biology and Environmental Studies, University of Zürich, Zürich, Switzerland
| | - Midori Tuda
- Laboratory of Insect Natural Enemies, Department of Bioresource Sciences, Kyushu University, Fukuoka 812-8581, Japan Institute of Biological Control, Faculty of Agriculture, Kyushu University, Fukuoka 812-8581, Japan
| | - Carl E Hjelmen
- Department of Entomology, Texas A&M University, College Station, TX 77843 2475, USA
| | - J Spencer Johnston
- Department of Entomology, Texas A&M University, College Station, TX 77843 2475, USA
| |
Collapse
|
37
|
Berger D, You T, Minano MR, Grieshop K, Lind MI, Arnqvist G, Maklakov AA. Sexually antagonistic selection on genetic variation underlying both male and female same-sex sexual behavior. BMC Evol Biol 2016; 16:88. [PMID: 27175796 PMCID: PMC4866275 DOI: 10.1186/s12862-016-0658-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 04/14/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Intralocus sexual conflict, arising from selection for different alleles at the same locus in males and females, imposes a constraint on sex-specific adaptation. Intralocus sexual conflict can be alleviated by the evolution of sex-limited genetic architectures and phenotypic expression, but pleiotropic constraints may hinder this process. Here, we explored putative intralocus sexual conflict and genetic (co)variance in a poorly understood behavior with near male-limited expression. Same-sex sexual behaviors (SSBs) generally do not conform to classic evolutionary models of adaptation but are common in male animals and have been hypothesized to result from perception errors and selection for high male mating rates. However, perspectives incorporating sex-specific selection on genes shared by males and females to explain the expression and evolution of SSBs have largely been neglected. RESULTS We performed two parallel sex-limited artificial selection experiments on SSB in male and female seed beetles, followed by sex-specific assays of locomotor activity and male sex recognition (two traits hypothesized to be functionally related to SSB) and adult reproductive success (allowing us to assess fitness consequences of genetic variance in SSB and its correlated components). Our experiments reveal both shared and sex-limited genetic variance for SSB. Strikingly, genetically correlated responses in locomotor activity and male sex-recognition were associated with sexually antagonistic fitness effects, but these effects differed qualitatively between male and female selection lines, implicating intralocus sexual conflict at both male- and female-specific genetic components underlying SSB. CONCLUSIONS Our study provides experimental support for the hypothesis that widespread pleiotropy generates pervasive intralocus sexual conflict governing the expression of SSBs, suggesting that SSB in one sex can occur due to the expression of genes that carry benefits in the other sex.
Collapse
Affiliation(s)
- David Berger
- Animal Ecology, Department of Ecology and Genetics, Uppsala University, Evolutionary Biology Centre, Norbyvägen 18D, 75105, Uppsala, Sweden.
| | - Tao You
- Animal Ecology, Department of Ecology and Genetics, Uppsala University, Evolutionary Biology Centre, Norbyvägen 18D, 75105, Uppsala, Sweden
| | - Maravillas R Minano
- Animal Ecology, Department of Ecology and Genetics, Uppsala University, Evolutionary Biology Centre, Norbyvägen 18D, 75105, Uppsala, Sweden
| | - Karl Grieshop
- Animal Ecology, Department of Ecology and Genetics, Uppsala University, Evolutionary Biology Centre, Norbyvägen 18D, 75105, Uppsala, Sweden
| | - Martin I Lind
- Animal Ecology, Department of Ecology and Genetics, Uppsala University, Evolutionary Biology Centre, Norbyvägen 18D, 75105, Uppsala, Sweden
| | - Göran Arnqvist
- Animal Ecology, Department of Ecology and Genetics, Uppsala University, Evolutionary Biology Centre, Norbyvägen 18D, 75105, Uppsala, Sweden
| | - Alexei A Maklakov
- Animal Ecology, Department of Ecology and Genetics, Uppsala University, Evolutionary Biology Centre, Norbyvägen 18D, 75105, Uppsala, Sweden
| |
Collapse
|
38
|
Grieshop K, Stångberg J, Martinossi-Allibert I, Arnqvist G, Berger D. Strong sexual selection in males against a mutation load that reduces offspring production in seed beetles. J Evol Biol 2016; 29:1201-10. [DOI: 10.1111/jeb.12862] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Revised: 03/08/2016] [Accepted: 03/09/2016] [Indexed: 01/15/2023]
Affiliation(s)
- K. Grieshop
- Department of Ecology and Genetics; Animal Ecology; Uppsala University; Uppsala Sweden
| | - J. Stångberg
- Department of Ecology and Genetics; Animal Ecology; Uppsala University; Uppsala Sweden
| | | | - G. Arnqvist
- Department of Ecology and Genetics; Animal Ecology; Uppsala University; Uppsala Sweden
| | - D. Berger
- Department of Ecology and Genetics; Animal Ecology; Uppsala University; Uppsala Sweden
| |
Collapse
|
39
|
Immonen E, Collet M, Goenaga J, Arnqvist G. Direct and indirect genetic effects of sex-specific mitonuclear epistasis on reproductive ageing. Heredity (Edinb) 2016; 116:338-47. [PMID: 26732015 DOI: 10.1038/hdy.2015.112] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 11/04/2015] [Accepted: 11/18/2015] [Indexed: 11/09/2022] Open
Abstract
Mitochondria are involved in ageing and their function requires coordinated action of both mitochondrial and nuclear genes. Epistasis between the two genomes can influence lifespan but whether this also holds for reproductive senescence is unclear. Maternal inheritance of mitochondria predicts sex differences in the efficacy of selection on mitonuclear genotypes that should result in differences between females and males in mitochondrial genetic effects. Mitonuclear genotype of a focal individual may also indirectly affect trait expression in the mating partner. We tested these predictions in the seed beetle Callosobruchus maculatus, using introgression lines harbouring distinct mitonuclear genotypes. Our results reveal both direct and indirect sex-specific effects of mitonuclear epistasis on reproductive ageing. Females harbouring coadapted mitonuclear genotypes showed higher lifetime fecundity due to slower senescence relative to novel mitonuclear combinations. We found no evidence for mitonuclear coadaptation in males. Mitonuclear epistasis not only affected age-specific ejaculate weight, but also influenced male age-dependent indirect effects on traits expressed by their female partners (fecundity, egg size, longevity). These results demonstrate important consequences of sex-specific mitonuclear epistasis for both mating partners, consistent with a role for mitonuclear genetic constraints upon sex-specific adaptive evolution.
Collapse
Affiliation(s)
- E Immonen
- Evolutionary Biology Centre, Department of Ecology and Genetics, Uppsala University, Uppsala, Sweden
| | - M Collet
- Master BioSciences, Department of Biology, École Normale Supérieure of Lyon, Lyon, France
| | - J Goenaga
- Evolutionary Biology Centre, Department of Ecology and Genetics, Uppsala University, Uppsala, Sweden.,Århus Institute of Advanced Studies, Århus University, Århus, Denmark
| | - G Arnqvist
- Evolutionary Biology Centre, Department of Ecology and Genetics, Uppsala University, Uppsala, Sweden
| |
Collapse
|
40
|
Goenaga J, Yamane T, Rönn J, Arnqvist G. Within-species divergence in the seminal fluid proteome and its effect on male and female reproduction in a beetle. BMC Evol Biol 2015; 15:266. [PMID: 26627998 PMCID: PMC4667481 DOI: 10.1186/s12862-015-0547-2] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Accepted: 11/20/2015] [Indexed: 11/30/2022] Open
Abstract
Background Male seminal fluid proteins (SFPs), transferred to females during mating, are important reproductive proteins that have multifarious effects on female reproductive physiology and that often show remarkably rapid and divergent evolution. Inferences regarding natural selection on SFPs are based primarily on interspecific comparative studies, and our understanding of natural within-species variation in SFPs and whether this relates to reproductive phenotypes is very limited. Here, we introduce an empirical strategy to study intraspecific variation in and selection upon the seminal fluid proteome. We then apply this in a study of 15 distinct populations of the seed beetle Callosobruchus maculatus. Results Phenotypic assays of these populations showed significant differences in reproductive phenotypes (male success in sperm competition and male ability to stimulate female fecundity). A quantitative proteomic study of replicated samples of male accessory glands revealed a large number of potential SFPs, of which ≥127 were found to be transferred to females at mating. Moreover, population divergence in relative SFP abundance across populations was large and remarkably multidimensional. Most importantly, variation in male SFP abundance across populations was associated with male sperm competition success and male ability to stimulate female egg production. Conclusions Our study provides the first direct evidence for postmating sexual selection on standing intraspecific variation in SFP abundance and the pattern of divergence across populations in the seminal fluid proteome match the pattern predicted by the postmating sexual selection paradigm for SFP evolution. Our findings provide novel support for the hypothesis that sexual selection on SFPs is an important engine of incipient speciation. Electronic supplementary material The online version of this article (doi:10.1186/s12862-015-0547-2) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Julieta Goenaga
- Animal Ecology, Department of Ecology and Genetics, Evolutionary Biology Centre, Uppsala University, Norbyvägen 18D, SE-752 36, Uppsala, Sweden. .,Aarhus Institute of Advanced Studies, Aarhus University, Høegh-Guldbergs Gade 6B, 11 8000, Aarhus C, Denmark.
| | - Takashi Yamane
- Animal Ecology, Department of Ecology and Genetics, Evolutionary Biology Centre, Uppsala University, Norbyvägen 18D, SE-752 36, Uppsala, Sweden.
| | - Johanna Rönn
- Animal Ecology, Department of Ecology and Genetics, Evolutionary Biology Centre, Uppsala University, Norbyvägen 18D, SE-752 36, Uppsala, Sweden.
| | - Göran Arnqvist
- Animal Ecology, Department of Ecology and Genetics, Evolutionary Biology Centre, Uppsala University, Norbyvägen 18D, SE-752 36, Uppsala, Sweden.
| |
Collapse
|
41
|
Immonen E, Rönn J, Watson C, Berger D, Arnqvist G. Complex mitonuclear interactions and metabolic costs of mating in male seed beetles. J Evol Biol 2015; 29:360-70. [PMID: 26548644 DOI: 10.1111/jeb.12789] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Accepted: 11/03/2015] [Indexed: 02/02/2023]
Abstract
The lack of evolutionary response to selection on mitochondrial genes through males predicts the evolution of nuclear genetic influence on male-specific mitochondrial function, for example by gene duplication and evolution of sex-specific expression of paralogs involved in metabolic pathways. Intergenomic epistasis may therefore be a prevalent feature of the genetic architecture of male-specific organismal function. Here, we assess the role of mitonuclear genetic variation for male metabolic phenotypes [metabolic rate and respiratory quotient (RQ)] associated with ejaculate renewal, in the seed beetle Callosobruchus maculatus, by assaying lines with crossed combinations of distinct mitochondrial haplotypes and nuclear lineages. We found a significant increase in metabolic rate following mating relative to virgin males. Moreover, processes associated with ejaculate renewal showed variation in metabolic rate that was affected by mitonuclear interactions. Mitochondrial haplotype influenced mating-related changes in RQ, but this pattern varied over time. Mitonuclear genotype and the energy spent during ejaculate production affected the weight of the ejaculate, but the strength of this effect varied across mitochondrial haplotypes showing that the genetic architecture of male-specific reproductive function is complex. Our findings unveil hitherto underappreciated metabolic costs of mating and ejaculate renewal, and provide the first empirical demonstration of mitonuclear epistasis on male reproductive metabolic processes.
Collapse
Affiliation(s)
- E Immonen
- Evolutionary Biology Centre, Department of Ecology and Genetics, Uppsala University, Uppsala, Sweden
| | - J Rönn
- Evolutionary Biology Centre, Department of Ecology and Genetics, Uppsala University, Uppsala, Sweden
| | - C Watson
- Evolutionary Biology Centre, Department of Ecology and Genetics, Uppsala University, Uppsala, Sweden
| | - D Berger
- Evolutionary Biology Centre, Department of Ecology and Genetics, Uppsala University, Uppsala, Sweden
| | - G Arnqvist
- Evolutionary Biology Centre, Department of Ecology and Genetics, Uppsala University, Uppsala, Sweden
| |
Collapse
|
42
|
Jelić M, Arnqvist G, Novičić ZK, Kenig B, Tanasković M, Anđelković M, Stamenković-Radak M. Sex-specific effects of sympatric mitonuclear variation on fitness in Drosophila subobscura. BMC Evol Biol 2015; 15:135. [PMID: 26156582 PMCID: PMC4496845 DOI: 10.1186/s12862-015-0421-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Accepted: 06/16/2015] [Indexed: 11/14/2022] Open
Abstract
Background A number of recent studies have shown that the pattern of mitochondrial DNA variation and evolution is at odds with a neutral equilibrium model. Theory has suggested that selection on mitonuclear genotypes can act to maintain stable mitonuclear polymorphism within populations. However, this effect largely relies upon selection being either sex-specific or frequency dependent. Here, we use mitonuclear introgression lines to assess differences in a series of key life-history traits (egg-to-adult developmental time, viability, offspring sex-ratio, adult longevity and resistance to desiccation) in Drosophila subobscura fruit flies carrying one of three different sympatric mtDNA haplotypes. Results We found functional differences between these sympatric mtDNA haplotypes, but these effects were contingent upon the nuclear genome with which they were co-expressed. Further, we demonstrate a significant mitonuclear genetic effect on adult sex ratio, as well as a sex × mtDNA × nuDNA interaction for adult longevity. Conclusions The observed effects suggest that sex specific mitonuclear selection contributes to the maintenance of mtDNA polymorphism and to mitonuclear linkage disequilibrium in this model system. Electronic supplementary material The online version of this article (doi:10.1186/s12862-015-0421-2) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Mihailo Jelić
- Faculty of Biology, University of Belgrade, Studentski trg 16, 11000, Belgrade, Serbia.
| | - Göran Arnqvist
- Animal Ecology, Department of Ecology and Genetics, Uppsala University, Norbyvägen 18D, SE - 752 36, Uppsala, Sweden.
| | - Zorana Kurbalija Novičić
- Institute for Biological Research "Siniša Stanković", University of Belgrade, Despot Stefan Blvd. 142, 11000, Belgrade, Serbia.
| | - Bojan Kenig
- Institute for Biological Research "Siniša Stanković", University of Belgrade, Despot Stefan Blvd. 142, 11000, Belgrade, Serbia.
| | - Marija Tanasković
- Faculty of Biology, University of Belgrade, Studentski trg 16, 11000, Belgrade, Serbia.
| | - Marko Anđelković
- Faculty of Biology, University of Belgrade, Studentski trg 16, 11000, Belgrade, Serbia. .,Institute for Biological Research "Siniša Stanković", University of Belgrade, Despot Stefan Blvd. 142, 11000, Belgrade, Serbia. .,Serbian Academy of Sciences and Arts, Knez Mihailova 35, 11000, Belgrade, Serbia.
| | - Marina Stamenković-Radak
- Faculty of Biology, University of Belgrade, Studentski trg 16, 11000, Belgrade, Serbia. .,Institute for Biological Research "Siniša Stanković", University of Belgrade, Despot Stefan Blvd. 142, 11000, Belgrade, Serbia.
| |
Collapse
|
43
|
Abstract
There is a growing awareness of the influence of mitochondrial genetic variation on life-history phenotypes, particularly via epistatic interactions with nuclear genes. Owing to their direct effect on traits such as metabolic and growth rates, mitonuclear interactions may also affect variation in behavioural types or personalities (i.e. behavioural variation that is consistent within individuals, but differs among individuals). However, this possibility is largely unexplored. We used mitonuclear introgression lines, where three mitochondrial genomes were introgressed into three nuclear genetic backgrounds, to disentangle genetic effects on behavioural variation in a seed beetle. We found within-individual consistency in a suite of activity-related behaviours, providing evidence for variation in personality. Composite measures of overall activity of individuals in behavioural assays were influenced by both nuclear genetic variation and by the interaction between nuclear and mitochondrial genomes. More importantly, the degree of expression of behavioural and life-history phenotypes was correlated and mitonuclear genetic variation affected expression of these concerted phenotypes. These results show that mitonuclear genetic variation affects both behavioural and life-history traits, and they provide novel insights into the maintenance of genetic variation in behaviour and personality.
Collapse
Affiliation(s)
- Hanne Løvlie
- Animal Ecology, Department of Ecology and Genetics, Uppsala University, Norbyvägen 18D, 75236 Uppsala, Sweden
| | - Elina Immonen
- Animal Ecology, Department of Ecology and Genetics, Uppsala University, Norbyvägen 18D, 75236 Uppsala, Sweden
| | - Emil Gustavsson
- Animal Ecology, Department of Ecology and Genetics, Uppsala University, Norbyvägen 18D, 75236 Uppsala, Sweden
| | - Erem Kazancioğlu
- Animal Ecology, Department of Ecology and Genetics, Uppsala University, Norbyvägen 18D, 75236 Uppsala, Sweden
| | - Göran Arnqvist
- Animal Ecology, Department of Ecology and Genetics, Uppsala University, Norbyvägen 18D, 75236 Uppsala, Sweden
| |
Collapse
|
44
|
Yamane T, Goenaga J, Rönn JL, Arnqvist G. Male seminal fluid substances affect sperm competition success and female reproductive behavior in a seed beetle. PLoS One 2015; 10:e0123770. [PMID: 25893888 PMCID: PMC4404252 DOI: 10.1371/journal.pone.0123770] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Accepted: 02/27/2015] [Indexed: 01/14/2023] Open
Abstract
Male seminal fluid proteins are known to affect female reproductive behavior and physiology by reducing mating receptivity and by increasing egg production rates. Such substances are also though to increase the competitive fertilization success of males, but the empirical foundation for this tenet is restricted. Here, we examined the effects of injections of size-fractioned protein extracts from male reproductive organs on both male competitive fertilization success (i.e., P2 in double mating experiments) and female reproduction in the seed beetle Callosobruchus maculatus. We found that extracts of male seminal vesicles and ejaculatory ducts increased competitive fertilization success when males mated with females 1 day after the females’ initial mating, while extracts from accessory glands and testes increased competitive fertilization success when males mated with females 2 days after the females’ initial mating. Moreover, different size fractions of seminal fluid proteins had distinct and partly antagonistic effects on male competitive fertilization success. Collectively, our experiments show that several different seminal fluid proteins, deriving from different parts in the male reproductive tract and of different molecular weight, affect male competitive fertilization success in C. maculatus. Our results highlight the diverse effects of seminal fluid proteins and show that the function of such proteins can be contingent upon female mating status. We also document effects of different size fractions on female mating receptivity and egg laying rates, which can serve as a basis for future efforts to identify the molecular identity of seminal fluid proteins and their function in this model species.
Collapse
Affiliation(s)
| | - Julieta Goenaga
- Aarhus Institute of Advanced Studies, Aarhus University, Aarhus, Denmark
| | | | - Göran Arnqvist
- Animal Ecology, Department of Ecology and Genetics, Uppsala University, Uppsala, Sweden
- * E-mail:
| |
Collapse
|
45
|
|
46
|
Abstract
There is increasing evidence of segregating sexually antagonistic (SA) genetic variation for fitness in laboratory and wild populations, yet the conditions for the maintenance of such variation can be restrictive. Epistatic interactions between genes can contribute to the maintenance of genetic variance in fitness and we suggest that epistasis between SA genes should be pervasive. Here, we explore its effect on SA genetic variation in fitness using a two locus model with negative epistasis. Our results demonstrate that epistasis often increases the parameter space showing polymorphism for SA loci. This is because selection in one locus is affected by allele frequencies at the other, which can act to balance net selection in males and females. Increased linkage between SA loci had more marginal effects. We also show that under some conditions, large portions of the parameter space evolve to a state where male benefit alleles are fixed at one locus and female benefit alleles at the other. This novel effect of epistasis on SA loci, which we term the 'equity effect', may have important effects on population differentiation and may contribute to speciation. More generally, these results support the suggestion that epistasis contributes to population divergence.
Collapse
Affiliation(s)
- Göran Arnqvist
- Animal Ecology, Department of Ecology and Genetics, Uppsala University, SE-752 36 Uppsala, Sweden
| | - Nikolas Vellnow
- Evolutionary Biology, Zoological Institute, University of Basel, CH-4051 Basel, Switzerland
| | - Locke Rowe
- Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Canada, M5S 3B2
| |
Collapse
|
47
|
Kurbalija Novičić Z, Immonen E, Jelić M, AnÐelković M, Stamenković-Radak M, Arnqvist G. Within-population genetic effects of mtDNA on metabolic rate in Drosophila subobscura. J Evol Biol 2015; 28:338-46. [PMID: 25454557 DOI: 10.1111/jeb.12565] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Revised: 11/25/2014] [Accepted: 11/26/2014] [Indexed: 12/22/2022]
Abstract
A growing body of research supports the view that within-species sequence variation in the mitochondrial genome (mtDNA) is functional, in the sense that it has important phenotypic effects. However, most of this empirical foundation is based on comparisons across populations, and few studies have addressed the functional significance of mtDNA polymorphism within populations. Here, using mitonuclear introgression lines, we assess differences in whole-organism metabolic rate of adult Drosophila subobscura fruit flies carrying either of three different sympatric mtDNA haplotypes. We document sizeable, up to 20%, differences in metabolic rate across these mtDNA haplotypes. Further, these mtDNA effects are to some extent sex specific. We found no significant nuclear or mitonuclear genetic effects on metabolic rate, consistent with a low degree of linkage disequilibrium between mitochondrial and nuclear genes within populations. The fact that mtDNA haplotype variation within a natural population affects metabolic rate, which is a key physiological trait with important effects on life-history traits, adds weight to the emergent view that mtDNA haplotype variation is under natural selection and it revitalizes the question as to what processes act to maintain functional mtDNA polymorphism within populations.
Collapse
|
48
|
Booksmythe I, Fritzsche K, Arnqvist G. Sperm competition generates evolution of increased paternal investment in a sex role-reversed seed beetle. J Evol Biol 2014; 27:2841-9. [DOI: 10.1111/jeb.12549] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Revised: 11/10/2014] [Accepted: 11/10/2014] [Indexed: 11/28/2022]
Affiliation(s)
- I. Booksmythe
- Animal Ecology; Department of Evolution and Genetics; Evolutionary Biology Centre; Uppsala University; Uppsala Sweden
| | - K. Fritzsche
- Animal Ecology; Department of Evolution and Genetics; Evolutionary Biology Centre; Uppsala University; Uppsala Sweden
| | - G. Arnqvist
- Animal Ecology; Department of Evolution and Genetics; Evolutionary Biology Centre; Uppsala University; Uppsala Sweden
| |
Collapse
|
49
|
|
50
|
|