1
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Beaudry FEG, Rifkin JL, Peake AL, Kim D, Jarvis-Cross M, Barrett SCH, Wright SI. Effects of the neo-X chromosome on genomic signatures of hybridization in Rumex hastatulus. Mol Ecol 2022; 31:3708-3721. [PMID: 35569016 DOI: 10.1111/mec.16496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 04/23/2022] [Accepted: 05/05/2022] [Indexed: 11/30/2022]
Abstract
Natural hybrid zones provide opportunities for studies of the evolution of reproductive isolation in wild populations. Although recent investigations have found that the formation of neo-sex chromosomes is associated with reproductive isolation, the mechanisms remain unclear in most cases. Here, we assess the contemporary structure of gene flow in the contact zone between largely allopatric cytotypes of the dioecious plant Rumex hastatulus, a species with evidence of sex chromosome turn-over. Males to the west of the Mississippi river, USA, have an X and a single Y chromosome, whereas populations to the east of the river have undergone a chromosomal rearrangement giving rise to a larger X and two Y chromosomes. Using reduced-representation sequencing, we provide evidence that hybrids form readily and survive multiple backcross generations in the field, demonstrating the potential for ongoing gene flow between the cytotypes. Cline analysis of each chromosome separately captured no signals of difference in cline shape between chromosomes. However, principal component regression revealed a significant increase in the contribution of individual SNPs to inter-cytotype differentiation on the neo-X chromosome, but no correlation with recombination rate. Cline analysis revealed that the only SNPs with significantly steeper clines than the genome average were located on the neo-X. Our data are consistent with a role for neo-sex chromosomes in reproductive isolation between R. hastatulus cytotypes. Our investigation highlights the importance of studying plant hybrid zones for understanding the evolution of sex chromosomes.
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Affiliation(s)
- Felix E G Beaudry
- The University of Toronto, Department of Ecology and Evolutionary Biology, Toronto, ON, Canada
| | - Joanna L Rifkin
- The University of Toronto, Department of Ecology and Evolutionary Biology, Toronto, ON, Canada
| | - Amanda L Peake
- The University of Toronto, Department of Ecology and Evolutionary Biology, Toronto, ON, Canada
| | - Deanna Kim
- The University of Toronto, Department of Ecology and Evolutionary Biology, Toronto, ON, Canada
| | - Madeline Jarvis-Cross
- The University of Toronto, Department of Ecology and Evolutionary Biology, Toronto, ON, Canada
| | - Spencer C H Barrett
- The University of Toronto, Department of Ecology and Evolutionary Biology, Toronto, ON, Canada
| | - Stephen I Wright
- The University of Toronto, Department of Ecology and Evolutionary Biology, Toronto, ON, Canada
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2
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Balard A, Heitlinger E. Shifting focus from resistance to disease tolerance: A review on hybrid house mice. Ecol Evol 2022; 12:e8889. [PMID: 35571751 PMCID: PMC9077717 DOI: 10.1002/ece3.8889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 04/11/2022] [Accepted: 04/14/2022] [Indexed: 11/10/2022] Open
Abstract
Parasites have been proposed to modulate the fitness of hybridizing hosts in part based on observations in the European house mouse hybrid zone (HMHZ), a tension zone in which hybrids show reduced fitness. We here review evidence (1) for parasite load differences in hybrid versus parental mice and (2) for health and fitness effects of parasites promoting or preventing introgression and hybridization. The question of relative resistance or susceptibility of hybrids to parasites in the HMHZ has long been controversial. Recent field studies found hybrids to be more resistant than mice from parental subspecies against infections with pinworms and protozoans (Eimeria spp.). We argue that the field studies underlying the contradictory impression of hybrid susceptibility have limitations in sample size, statistical analysis and scope, focusing only on macroparasites. We suggest that weighted evidence from field studies indicate hybrid resistance. Health is a fitness component through which resistance can modulate overall fitness. Resistance, however, should not be extrapolated directly to a fitness effect, as the relationship between resistance and health can be modulated by tolerance. In our own recent work, we found that the relationship between health and resistance (tolerance) differs between infections with the related species E. falciformis and E. ferrisi. Health and tolerance need to be assessed directly and the choice of parasite has made this difficult in previous experimental studies of house mice. We discuss how experimental Eimeria spp. infections in hybrid house mice can address resistance, health and tolerance in conjunction.
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Affiliation(s)
- Alice Balard
- Department of Molecular Parasitology Institute for Biology Humboldt University Berlin (HU) Berlin Germany
- Research Group Ecology and Evolution of Molecular Parasite‐Host Interactions Leibniz‐Institut for Zoo and Wildlife Research (IZW) im Forschungsverbund Berlin e.V. Berlin Germany
| | - Emanuel Heitlinger
- Department of Molecular Parasitology Institute for Biology Humboldt University Berlin (HU) Berlin Germany
- Research Group Ecology and Evolution of Molecular Parasite‐Host Interactions Leibniz‐Institut for Zoo and Wildlife Research (IZW) im Forschungsverbund Berlin e.V. Berlin Germany
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3
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Fujiwara K, Kawai Y, Takada T, Shiroishi T, Saitou N, Suzuki H, Osada N. Insights into Mus musculus population structure across Eurasia revealed by whole-genome analysis. Genome Biol Evol 2022; 14:6582302. [PMID: 35524942 PMCID: PMC9122283 DOI: 10.1093/gbe/evac068] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/03/2022] [Indexed: 11/13/2022] Open
Abstract
For more than 100 years, house mice (Mus musculus) have been used as a key animal model in biomedical research. House mice are genetically diverse, yet their genetic background at the global level has not been fully understood. Previous studies have suggested that they originated in South Asia and diverged into three major subspecies, almost simultaneously, approximately 110,000–500,000 years ago; however, they have spread across the world with the migration of modern humans in prehistoric and historic times (∼10,000 years ago to the present day) and have undergone secondary contact, which has complicated the genetic landscape of wild house mice. In this study, we sequenced the whole-genome sequences of 98 wild house mice collected from Eurasia, particularly East Asia, Southeast Asia, and South Asia. Although wild house mice were found to consist of three major genetic groups corresponding to the three major subspecies, individuals representing admixtures between subspecies were more prevalent in East Asia than has been previously recognized. Furthermore, several samples exhibited an incongruent pattern of genealogies between mitochondrial and autosomal genomes. Using samples that likely retained the original genetic components of subspecies with the least admixture, we estimated the pattern and timing of divergence among the subspecies. The estimated divergence time of the three subspecies was 187,000–226,000 years ago. These results will help us to understand the genetic diversity of wild mice on a global scale, and the findings will be particularly useful in future biomedical and evolutionary studies involving laboratory mice established from such wild mice.
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Affiliation(s)
- Kazumichi Fujiwara
- Graduate School of Information Science and Technology, Hokkaido University, Sapporo, Japan.,Global Station for Big Data and Cybersecurity, GI-CoRE, Hokkaido University, Sapporo, Japan
| | - Yosuke Kawai
- Genome Medical Science Project (Toyama), National Center for Global Health and Medicine (NCGM), Tokyo, Japan
| | - Toyoyuki Takada
- Integrated BioResource Information Division, RIKEN BioResource Research Center, Tsukuba, Japan
| | | | - Naruya Saitou
- Population Genetics Laboratory, National Institute of Genetics, Mishima, Japan.,Faculty of Medicine, University of the Ryukyus, Okinawa, Japan
| | - Hitoshi Suzuki
- Graduate School of Environmental Science, Hokkaido University, Sapporo, Japan
| | - Naoki Osada
- Graduate School of Information Science and Technology, Hokkaido University, Sapporo, Japan.,Global Station for Big Data and Cybersecurity, GI-CoRE, Hokkaido University, Sapporo, Japan
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4
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North HL, Caminade P, Severac D, Belkhir K, Smadja CM. The role of copy-number variation in the reinforcement of sexual isolation between the two European subspecies of the house mouse. Philos Trans R Soc Lond B Biol Sci 2020; 375:20190540. [PMID: 32654648 PMCID: PMC7423270 DOI: 10.1098/rstb.2019.0540] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/04/2020] [Indexed: 12/24/2022] Open
Abstract
Reinforcement has the potential to generate strong reproductive isolation through the evolution of barrier traits as a response to selection against maladaptive hybridization, but the genetic changes associated with this process remain largely unexplored. Building upon the increasing evidence for a role of structural variants in adaptation and speciation, we addressed the role of copy-number variation in the reinforcement of sexual isolation evidenced between the two European subspecies of the house mouse. We characterized copy-number divergence between populations of Mus musculus musculus that display assortative mate choice, and those that do not, using whole-genome resequencing data. Updating methods to detect deletions and tandem duplications (collectively: copy-number variants, CNVs) in Pool-Seq data, we developed an analytical pipeline dedicated to identifying genomic regions showing the expected pattern of copy-number displacement under a reinforcement scenario. This strategy allowed us to detect 1824 deletions and seven tandem duplications that showed extreme differences in frequency between behavioural classes across replicate comparisons. A subset of 480 deletions and four tandem duplications were specifically associated with the derived trait of assortative mate choice. These 'Choosiness-associated' CNVs occur in hundreds of genes. Consistent with our hypothesis, such genes included olfactory receptors potentially involved in the olfactory-based assortative mate choice in this system as well as one gene, Sp110, that is known to show patterns of differential expression between behavioural classes in an organ used in mate choice-the vomeronasal organ. These results demonstrate that fine-scale structural changes are common and highly variable within species, despite being under-studied, and may be important targets of reinforcing selection in this system and others. This article is part of the theme issue 'Towards the completion of speciation: the evolution of reproductive isolation beyond the first barriers'.
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Affiliation(s)
- Henry L. North
- Institut des Sciences de l'Evolution (UMR 5554 CNRS, IRD, EPHE, Université de Montpellier), Université de Montpellier, Campus Triolet, Place Eugène Bataillon, 34095 Montpellier, France
| | - Pierre Caminade
- Institut des Sciences de l'Evolution (UMR 5554 CNRS, IRD, EPHE, Université de Montpellier), Université de Montpellier, Campus Triolet, Place Eugène Bataillon, 34095 Montpellier, France
| | - Dany Severac
- MGX-Montpellier GenomiX, c/o Institut de Génomique Fonctionnelle, 141 rue de la cardonille, 34094 Montpellier Cedex 5, France
| | - Khalid Belkhir
- Institut des Sciences de l'Evolution (UMR 5554 CNRS, IRD, EPHE, Université de Montpellier), Université de Montpellier, Campus Triolet, Place Eugène Bataillon, 34095 Montpellier, France
| | - Carole M. Smadja
- Institut des Sciences de l'Evolution (UMR 5554 CNRS, IRD, EPHE, Université de Montpellier), Université de Montpellier, Campus Triolet, Place Eugène Bataillon, 34095 Montpellier, France
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5
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Bímová BV, Macholán M, Ďureje Ľ, Bímová KB, Martincová I, Piálek J. Sperm quality, aggressiveness and generation turnover may facilitate unidirectional Y chromosome introgression across the European house mouse hybrid zone. Heredity (Edinb) 2020; 125:200-211. [PMID: 32528080 DOI: 10.1038/s41437-020-0330-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 05/29/2020] [Accepted: 06/03/2020] [Indexed: 12/19/2022] Open
Abstract
The widespread and locally massive introgression of Y chromosomes of the eastern house mouse (Mus musculus musculus) into the range of the western subspecies (M. m. domesticus) in Central Europe calls for an explanation of its underlying mechanisms. Given the paternal inheritance pattern, obvious candidates for traits mediating the introgression are characters associated with sperm quantity and quality. We can also expect traits such as size, aggression or the length of generation cycles to facilitate the spread. We have created two consomic strains carrying the non-recombining region of the Y chromosome of the opposite subspecies, allowing us to study introgression in both directions, something impossible in nature due to the unidirectionality of introgression. We analyzed several traits potentially related to male fitness. Transmission of the domesticus Y onto the musculus background had negative effects on all studied traits. Likewise, domesticus males possessing the musculus Y had, on average, smaller body and testes and lower sperm count than the parental strain. However, the same consomic males tended to produce less- dissociated sperm heads, to win more dyadic encounters, and to have shorter generation cycles than pure domesticus males. These data suggest that the domesticus Y is disadvantageous on the musculus background, while introgression in the opposite direction can confer a recognizable, though not always significant, selective advantage. Our results are thus congruent with the unidirectional musculus → domesticus Y chromosome introgression in Central Europe. In addition to some previous studies, they show this to be a multifaceted phenomenon demanding a multidisciplinary approach.
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Affiliation(s)
- Barbora Vošlajerová Bímová
- Research Facility Studenec, Institute of Vertebrate Biology, Czech Academy of Sciences, Květná 8, 603 65, Brno, Czech Republic.,Laboratory of Mammalian Evolutionary Genetics, Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Veveří 97, 602 00, Brno, Czech Republic
| | - Miloš Macholán
- Laboratory of Mammalian Evolutionary Genetics, Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Veveří 97, 602 00, Brno, Czech Republic. .,Department of Botany and Zoology, Faculty of Science, Masaryk University, Kotlářská 2, 611 37, Brno, Czech Republic.
| | - Ľudovít Ďureje
- Research Facility Studenec, Institute of Vertebrate Biology, Czech Academy of Sciences, Květná 8, 603 65, Brno, Czech Republic
| | - Kateřina Berchová Bímová
- Department of Applied Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences in Prague, Kamýcká 1176, 165 00, Prague, Czech Republic
| | - Iva Martincová
- Research Facility Studenec, Institute of Vertebrate Biology, Czech Academy of Sciences, Květná 8, 603 65, Brno, Czech Republic
| | - Jaroslav Piálek
- Research Facility Studenec, Institute of Vertebrate Biology, Czech Academy of Sciences, Květná 8, 603 65, Brno, Czech Republic
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6
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McEntee JP, Burleigh JG, Singhal S. Dispersal Predicts Hybrid Zone Widths across Animal Diversity: Implications for Species Borders under Incomplete Reproductive Isolation. Am Nat 2020; 196:9-28. [PMID: 32552108 DOI: 10.1086/709109] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Hybrid zones occur as range boundaries for many animal taxa. One model for how hybrid zones form and stabilize is the tension zone model, a version of which predicts that hybrid zone widths are determined by a balance between random dispersal into hybrid zones and selection against hybrids. Here, we examine whether random dispersal and proxies for selection against hybrids (genetic distances between hybridizing pairs) can explain variation in hybrid zone widths across 131 hybridizing pairs of animals. We show that these factors alone can explain ∼40% of the variation in zone width among animal hybrid zones, with dispersal explaining far more of the variation than genetic distances. Patterns within clades were idiosyncratic. Genetic distances predicted hybrid zone widths particularly well for reptiles, while this relationship was opposite tension zone predictions in birds. Last, the data suggest that dispersal and molecular divergence set lower bounds on hybrid zone widths in animals, indicating that there are geographic restrictions on hybrid zone formation. Overall, our analyses reinforce the fundamental importance of dispersal in hybrid zone formation and more generally in the ecology of range boundaries.
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7
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van Riemsdijk I, Butlin RK, Wielstra B, Arntzen JW. Testing an hypothesis of hybrid zone movement for toads in France. Mol Ecol 2019; 28:1070-1083. [PMID: 30609055 DOI: 10.1111/mec.15005] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 12/08/2018] [Accepted: 12/19/2018] [Indexed: 02/06/2023]
Abstract
Hybrid zone movement may result in substantial unidirectional introgression of selectively neutral material from the local to the advancing species, leaving a genetic footprint. This genetic footprint is represented by a trail of asymmetric tails and displaced cline centres in the wake of the moving hybrid zone. A peak of admixture linkage disequilibrium is predicted to exist ahead of the centre of the moving hybrid zone. We test these predictions of the movement hypothesis in a hybrid zone between common (Bufo bufo) and spined toads (B. spinosus), using 31 nuclear and one mtDNA SNPs along a transect in the northwest of France. Average effective selection in Bufo hybrids is low and clines vary in shape and centre. A weak pattern of asymmetric introgression is inferred from cline discordance of seven nuclear markers. The dominant direction of gene flow is from B. spinosus to B. bufo and is in support of southward movement of the hybrid zone. Conversely, a peak of admixture linkage disequilibrium north of the hybrid zone suggests northward movement. These contrasting results can be explained by reproductive isolation of the B. spinosus and B. bufo gene pools at the southern (B. spinosus) side of the hybrid zone. The joint occurrence of asymmetric introgression and admixture linkage disequilibrium can also be explained by the combination of low dispersal and random genetic drift due to low effective population sizes.
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Affiliation(s)
- Isolde van Riemsdijk
- Taxonomy and Systematics, Naturalis Biodiversity Center, Leiden, The Netherlands.,Institute of Biology Leiden, Leiden University, Leiden, The Netherlands
| | - Roger K Butlin
- Department of Animal and Plant Sciences, University of Sheffield, Sheffield, UK.,Department of Marine Sciences, University of Gothenburg, Gothenburg, Sweden
| | - Ben Wielstra
- Taxonomy and Systematics, Naturalis Biodiversity Center, Leiden, The Netherlands.,Institute of Biology Leiden, Leiden University, Leiden, The Netherlands.,Department of Animal and Plant Sciences, University of Sheffield, Sheffield, UK.,Department of Ecology and Evolutionary Biology, University of California, Los Angeles, California
| | - Jan W Arntzen
- Taxonomy and Systematics, Naturalis Biodiversity Center, Leiden, The Netherlands
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8
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Veale AJ, Russell JC, King CM. The genomic ancestry, landscape genetics and invasion history of introduced mice in New Zealand. ROYAL SOCIETY OPEN SCIENCE 2018; 5:170879. [PMID: 29410804 PMCID: PMC5792881 DOI: 10.1098/rsos.170879] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Accepted: 12/15/2017] [Indexed: 06/07/2023]
Abstract
The house mouse (Mus musculus) provides a fascinating system for studying both the genomic basis of reproductive isolation, and the patterns of human-mediated dispersal. New Zealand has a complex history of mouse invasions, and the living descendants of these invaders have genetic ancestry from all three subspecies, although most are primarily descended from M. m. domesticus. We used the GigaMUGA genotyping array (approximately 135 000 loci) to describe the genomic ancestry of 161 mice, sampled from 34 locations from across New Zealand (and one Australian city-Sydney). Of these, two populations, one in the south of the South Island, and one on Chatham Island, showed complete mitochondrial lineage capture, featuring two different lineages of M. m. castaneus mitochondrial DNA but with only M. m. domesticus nuclear ancestry detectable. Mice in the northern and southern parts of the North Island had small traces (approx. 2-3%) of M. m. castaneus nuclear ancestry, and mice in the upper South Island had approximately 7-8% M. m. musculus nuclear ancestry including some Y-chromosomal ancestry-though no detectable M. m. musculus mitochondrial ancestry. This is the most thorough genomic study of introduced populations of house mice yet conducted, and will have relevance to studies of the isolation mechanisms separating subspecies of mice.
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Affiliation(s)
- Andrew J. Veale
- Department of Environmental and Animal Sciences, Unitec, 139 Carrington Road, Auckland 1025, New Zealand
| | - James C. Russell
- School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland Mail Centre, Auckland 1142, New Zealand
| | - Carolyn M. King
- Environmental Research Institute, School of Science, University of Waikato, Private Bag 2105, Hamilton 3240, New Zealand
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9
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Hunter EA, Matocq MD, Murphy PJ, Shoemaker KT. Differential Effects of Climate on Survival Rates Drive Hybrid Zone Movement. Curr Biol 2017; 27:3898-3903.e4. [DOI: 10.1016/j.cub.2017.11.029] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Revised: 10/20/2017] [Accepted: 11/09/2017] [Indexed: 11/29/2022]
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10
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Semenov GA, Scordato ESC, Khaydarov DR, Smith C, Kane NC, Safran RJ. Effects of assortative mate choice on the genomic and morphological structure of a hybrid zone between two bird subspecies. Mol Ecol 2017; 26:6430-6444. [DOI: 10.1111/mec.14376] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 08/15/2017] [Accepted: 09/27/2017] [Indexed: 12/20/2022]
Affiliation(s)
- Georgy A. Semenov
- Department of Ecology & Evolutionary Biology The University of Arizona Tucson AZ USA
- Institute of Systematics and Ecology of Animals Novosibirsk Russia
| | | | | | - Chris C. R. Smith
- Department of Ecology and Evolutionary Biology The University of Colorado Boulder CO USA
| | - Nolan C. Kane
- Department of Ecology and Evolutionary Biology The University of Colorado Boulder CO USA
| | - Rebecca J. Safran
- Department of Ecology and Evolutionary Biology The University of Colorado Boulder CO USA
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11
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Delahaie B, Cornuault J, Masson C, Bertrand JAM, Bourgeois YXC, Milá B, Thébaud C. Narrow hybrid zones in spite of very low population differentiation in neutral markers in an island bird species complex. J Evol Biol 2017; 30:2132-2145. [DOI: 10.1111/jeb.13177] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 07/26/2017] [Accepted: 09/07/2017] [Indexed: 02/06/2023]
Affiliation(s)
- B. Delahaie
- Laboratoire Évolution et Diversité Biologique (EDB); UMR 5174 Centre National de la Recherche Scientifique (CNRS) - Université Paul Sabatier - Ecole Nationale de Formation Agronomique (ENFA); Toulouse France
- Centre d'Ecologie Fonctionnelle et Evolutive; CNRS-UMR5175 CEFE; Montpellier France
| | - J. Cornuault
- Laboratoire Évolution et Diversité Biologique (EDB); UMR 5174 Centre National de la Recherche Scientifique (CNRS) - Université Paul Sabatier - Ecole Nationale de Formation Agronomique (ENFA); Toulouse France
| | - C. Masson
- Laboratoire Évolution et Diversité Biologique (EDB); UMR 5174 Centre National de la Recherche Scientifique (CNRS) - Université Paul Sabatier - Ecole Nationale de Formation Agronomique (ENFA); Toulouse France
| | - J. A. M. Bertrand
- Laboratoire Évolution et Diversité Biologique (EDB); UMR 5174 Centre National de la Recherche Scientifique (CNRS) - Université Paul Sabatier - Ecole Nationale de Formation Agronomique (ENFA); Toulouse France
| | - Y. X. C. Bourgeois
- Laboratoire Évolution et Diversité Biologique (EDB); UMR 5174 Centre National de la Recherche Scientifique (CNRS) - Université Paul Sabatier - Ecole Nationale de Formation Agronomique (ENFA); Toulouse France
| | - B. Milá
- National Museum of Natural Sciences; Spanish National Research Council (CSIC); Madrid Spain
| | - C. Thébaud
- Laboratoire Évolution et Diversité Biologique (EDB); UMR 5174 Centre National de la Recherche Scientifique (CNRS) - Université Paul Sabatier - Ecole Nationale de Formation Agronomique (ENFA); Toulouse France
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12
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Loire E, Tusso S, Caminade P, Severac D, Boursot P, Ganem G, Smadja CM. Do changes in gene expression contribute to sexual isolation and reinforcement in the house mouse? Mol Ecol 2017. [PMID: 28626946 DOI: 10.1111/mec.14212] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Expression divergence, rather than sequence divergence, has been shown to be important in speciation, particularly in the early stages of divergence of traits involved in reproductive isolation. In the two European subspecies of house mice, Mus musculus musculus and Mus musculus domesticus, earlier studies have demonstrated olfactory-based assortative mate preference in populations close to their hybrid zone. It has been suggested that this behaviour evolved following the recent secondary contact between the two taxa (~3,000 years ago) in response to selection against hybridization. To test for a role of changes in gene expression in the observed behavioural shift, we conducted a RNA sequencing experiment on mouse vomeronasal organs. Key candidate genes for pheromone-based subspecies recognition, the vomeronasal receptors, are expressed in these organs. Overall patterns of gene expression varied significantly between samples from the two subspecies, with a large number of differentially expressed genes between the two taxa. In contrast, only ~200 genes were found repeatedly differentially expressed between populations within M. m. musculus that did or did not display assortative mate preferences (close to or more distant from the hybrid zone, respectively), with an overrepresentation of genes belonging to vomeronasal receptor family 2. These receptors are known to play a key role in recognition of chemical cues that handle information about genetic identity. Interestingly, four of five of these differentially expressed receptors belong to the same phylogenetic cluster, suggesting specialization of a group of closely related receptors in the recognition of odorant signals that may allow subspecies recognition and assortative mating.
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Affiliation(s)
- Etienne Loire
- Centre National de la Recherche Scientifique (CNRS), Institut des Sciences de l'Evolution UMR 5554, Institut pour la Recherche et le Développement (IRD), EPHE, Université de Montpellier, Montpellier, France
| | - Sergio Tusso
- Centre National de la Recherche Scientifique (CNRS), Institut des Sciences de l'Evolution UMR 5554, Institut pour la Recherche et le Développement (IRD), EPHE, Université de Montpellier, Montpellier, France
| | - Pierre Caminade
- Centre National de la Recherche Scientifique (CNRS), Institut des Sciences de l'Evolution UMR 5554, Institut pour la Recherche et le Développement (IRD), EPHE, Université de Montpellier, Montpellier, France
| | - Dany Severac
- Montpellier GenomiX (MGX), Institut de Génomique Fonctionnelle, Montpellier Cedex 5, France
| | - Pierre Boursot
- Centre National de la Recherche Scientifique (CNRS), Institut des Sciences de l'Evolution UMR 5554, Institut pour la Recherche et le Développement (IRD), EPHE, Université de Montpellier, Montpellier, France
| | - Guila Ganem
- Centre National de la Recherche Scientifique (CNRS), Institut des Sciences de l'Evolution UMR 5554, Institut pour la Recherche et le Développement (IRD), EPHE, Université de Montpellier, Montpellier, France
| | - Carole M Smadja
- Centre National de la Recherche Scientifique (CNRS), Institut des Sciences de l'Evolution UMR 5554, Institut pour la Recherche et le Développement (IRD), EPHE, Université de Montpellier, Montpellier, France
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13
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Renaud S, Alibert P, Auffray JC. Impact of Hybridization on Shape, Variation and Covariation of the Mouse Molar. Evol Biol 2016. [DOI: 10.1007/s11692-016-9391-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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14
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Latour Y, Ganem G. Does competitive interaction drive species recognition in a house mouse secondary contact zone? Behav Ecol 2016. [DOI: 10.1093/beheco/arw149] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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15
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Viney M, Lazarou L, Abolins S. The laboratory mouse and wild immunology. Parasite Immunol 2015; 37:267-73. [PMID: 25303494 DOI: 10.1111/pim.12150] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Accepted: 10/03/2014] [Indexed: 01/29/2023]
Abstract
The laboratory mouse, Mus musculus domesticus, has been the workhorse of the very successful laboratory study of mammalian immunology. These studies--discovering how the mammalian immune system can work--have allowed the development of the field of wild immunology that is seeking to understand how the immune responses of wild animals contributes to animals' fitness. Remarkably, there have hardly been any studies of the immunology of wild M. musculus domesticus (or of rats, another common laboratory model), but the general finding is that these wild animals are more immunologically responsive, compared with their laboratory domesticated comparators. This difference probably reflects the comparatively greater previous exposure to antigens of these wild-caught animals. There are now excellent prospects for laboratory mouse immunology to make major advances in the field of wild immunology.
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Affiliation(s)
- M Viney
- School of Biological Sciences, University of Bristol, Bristol, UK
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16
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Smadja CM, Loire E, Caminade P, Thoma M, Latour Y, Roux C, Thoss M, Penn DJ, Ganem G, Boursot P. Seeking signatures of reinforcement at the genetic level: a hitchhiking mapping and candidate gene approach in the house mouse. Mol Ecol 2015; 24:4222-4237. [PMID: 26132782 DOI: 10.1111/mec.13301] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Revised: 06/12/2015] [Accepted: 06/17/2015] [Indexed: 12/11/2022]
Abstract
Reinforcement is the process by which prezygotic isolation is strengthened as a response to selection against hybridization. Most empirical support for reinforcement comes from the observation of its possible phenotypic signature: an accentuated degree of prezygotic isolation in the hybrid zone as compared to allopatry. Here, we implemented a novel approach to this question by seeking for the signature of reinforcement at the genetic level. In the house mouse, selection against hybrids and enhanced olfactory-based assortative mate preferences are observed in a hybrid zone between the two European subspecies Mus musculus musculus and M. m. domesticus, suggesting a possible recent reinforcement event. To test for the genetic signature of reinforcing selection and identify genes involved in sexual isolation, we adopted a hitchhiking mapping approach targeting genomic regions containing candidate genes for assortative mating in mice. We densely scanned these genomic regions in hybrid zone and allopatric samples using a large number of fast evolving microsatellite loci that allow the detection of recent selection events. We found a handful of loci showing the expected pattern of significant reduction in variability in populations close to the hybrid zone, showing assortative odour preference in mate choice experiments as compared to populations further away and displaying no such preference. These loci lie close to genes that we pinpoint as testable candidates for further investigation.
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Affiliation(s)
- Carole M Smadja
- Institut des Sciences de l'Evolution UMR 5554 (Centre National de la Recherche Scientifique CNRS, Institut pour la Recherche et le Développement IRD, Université de Montpellier), cc065 Université de Montpellier, Campus Triolet, 34095 Montpellier, France
| | - Etienne Loire
- Institut des Sciences de l'Evolution UMR 5554 (Centre National de la Recherche Scientifique CNRS, Institut pour la Recherche et le Développement IRD, Université de Montpellier), cc065 Université de Montpellier, Campus Triolet, 34095 Montpellier, France
| | - Pierre Caminade
- Institut des Sciences de l'Evolution UMR 5554 (Centre National de la Recherche Scientifique CNRS, Institut pour la Recherche et le Développement IRD, Université de Montpellier), cc065 Université de Montpellier, Campus Triolet, 34095 Montpellier, France
| | - Marios Thoma
- Institut des Sciences de l'Evolution UMR 5554 (Centre National de la Recherche Scientifique CNRS, Institut pour la Recherche et le Développement IRD, Université de Montpellier), cc065 Université de Montpellier, Campus Triolet, 34095 Montpellier, France
| | - Yasmin Latour
- Institut des Sciences de l'Evolution UMR 5554 (Centre National de la Recherche Scientifique CNRS, Institut pour la Recherche et le Développement IRD, Université de Montpellier), cc065 Université de Montpellier, Campus Triolet, 34095 Montpellier, France
| | - Camille Roux
- Institut des Sciences de l'Evolution UMR 5554 (Centre National de la Recherche Scientifique CNRS, Institut pour la Recherche et le Développement IRD, Université de Montpellier), cc065 Université de Montpellier, Campus Triolet, 34095 Montpellier, France
| | - Michaela Thoss
- University of Veterinary Medicine Vienna, Konrad Lorenz Institute of Ethology, Department of Integrative Biology and Evolution, Vienna, Austria
| | - Dustin J Penn
- University of Veterinary Medicine Vienna, Konrad Lorenz Institute of Ethology, Department of Integrative Biology and Evolution, Vienna, Austria
| | - Guila Ganem
- Institut des Sciences de l'Evolution UMR 5554 (Centre National de la Recherche Scientifique CNRS, Institut pour la Recherche et le Développement IRD, Université de Montpellier), cc065 Université de Montpellier, Campus Triolet, 34095 Montpellier, France
| | - Pierre Boursot
- Institut des Sciences de l'Evolution UMR 5554 (Centre National de la Recherche Scientifique CNRS, Institut pour la Recherche et le Développement IRD, Université de Montpellier), cc065 Université de Montpellier, Campus Triolet, 34095 Montpellier, France
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17
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Gravena W, da Silva VMF, da Silva MNF, Farias IP, Hrbek T. Living between rapids: genetic structure and hybridization in botos (Cetacea: Iniidae:Iniaspp.) of the Madeira River, Brazil. Biol J Linn Soc Lond 2015. [DOI: 10.1111/bij.12463] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Waleska Gravena
- Laboratório de Evolução e Genética Animal (LEGAL); Departamento de Genética; Universidade Federal do Amazonas; Av. General Rodrigo Otávio Jordão, 3000 69077-000 Manaus Amazonas Brazil
- Laboratório de Mamíferos Aquáticos; Instituto Nacional de Pesquisas da Amazônia; Av. André Araújo, 2936 69011-970 Manaus Amazonas Brazil
| | - Vera M. F. da Silva
- Laboratório de Mamíferos Aquáticos; Instituto Nacional de Pesquisas da Amazônia; Av. André Araújo, 2936 69011-970 Manaus Amazonas Brazil
| | - Maria N. F. da Silva
- Coleção de Mamíferos; Instituto Nacional de Pesquisas da Amazônia; Av. André Araújo, 2936 69011-970 Manaus Amazonas Brazil
| | - Izeni P. Farias
- Laboratório de Evolução e Genética Animal (LEGAL); Departamento de Genética; Universidade Federal do Amazonas; Av. General Rodrigo Otávio Jordão, 3000 69077-000 Manaus Amazonas Brazil
| | - Tomas Hrbek
- Laboratório de Evolução e Genética Animal (LEGAL); Departamento de Genética; Universidade Federal do Amazonas; Av. General Rodrigo Otávio Jordão, 3000 69077-000 Manaus Amazonas Brazil
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18
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Hollander J, Galindo J, Butlin RK. Selection on outlier loci and their association with adaptive phenotypes in Littorina saxatilis contact zones. J Evol Biol 2014; 28:328-37. [PMID: 25439395 DOI: 10.1111/jeb.12564] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2014] [Revised: 11/24/2014] [Accepted: 11/25/2014] [Indexed: 01/31/2023]
Abstract
A fundamental issue in speciation research is to evaluate phenotypic variation and the genomics driving the evolution of reproductive isolation between sister taxa. Above all, hybrid zones are excellent study systems for researchers to examine the association of genetic differentiation, phenotypic variation and the strength of selection. We investigated two contact zones in the marine gastropod Littorina saxatilis and utilized landmark-based geometric morphometric analysis together with amplified fragment length polymorphism (AFLP) markers to assess phenotypic and genomic divergence between ecotypes under divergent selection. From genetic markers, we calculated the cline width, linkage disequilibrium and the average effective selection on a locus. Additionally, we conducted an association analysis linking the outlier loci and phenotypic variation between ecotypes and show that a proportion of outlier loci are associated with key adaptive phenotypic traits.
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Affiliation(s)
- J Hollander
- Department of Animal and Plant Sciences, University of Sheffield, Sheffield, UK; Department of Biology, Aquatic Ecology, Lund University, Lund, Sweden
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19
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Hiadlovská Z, Macholán M, Mikula O, Vošlajerová Bímová B. The meek inherit the earth: less aggressive wild mice are more successful in challenging situations. Biol J Linn Soc Lond 2014. [DOI: 10.1111/bij.12307] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zuzana Hiadlovská
- Laboratory of Mammalian Evolutionary Genetics; Institute of Animal Physiology and Genetics; Academy of Sciences of the Czech Republic; Brno Czech Republic
- Institute of Botany and Zoology; Faculty of Sciences; Masaryk University; Brno Czech Republic
| | - Miloš Macholán
- Laboratory of Mammalian Evolutionary Genetics; Institute of Animal Physiology and Genetics; Academy of Sciences of the Czech Republic; Brno Czech Republic
- Institute of Botany and Zoology; Faculty of Sciences; Masaryk University; Brno Czech Republic
| | - Ondřej Mikula
- Laboratory of Mammalian Evolutionary Genetics; Institute of Animal Physiology and Genetics; Academy of Sciences of the Czech Republic; Brno Czech Republic
- Institute of Vertebrate Biology; Academy of Sciences of the Czech Republic; Brno Czech Republic
| | - Barbora Vošlajerová Bímová
- Laboratory of Mammalian Evolutionary Genetics; Institute of Animal Physiology and Genetics; Academy of Sciences of the Czech Republic; Brno Czech Republic
- Institute of Vertebrate Biology; Academy of Sciences of the Czech Republic; Brno Czech Republic
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20
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Baldassarre DT, White TA, Karubian J, Webster MS. GENOMIC AND MORPHOLOGICAL ANALYSIS OF A SEMIPERMEABLE AVIAN HYBRID ZONE SUGGESTS ASYMMETRICAL INTROGRESSION OF A SEXUAL SIGNAL. Evolution 2014; 68:2644-57. [DOI: 10.1111/evo.12457] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Accepted: 05/22/2014] [Indexed: 12/14/2022]
Affiliation(s)
- Daniel T. Baldassarre
- Department of Neurobiology and Behavior; Cornell University; Ithaca New York 14850
- Macaulay Library; Cornell Lab of Ornithology; Ithaca New York 14853
| | - Thomas A. White
- Department of Ecology and Evolutionary Biology; Cornell University; Ithaca New York 14850
| | - Jordan Karubian
- Department of Ecology and Evolutionary Biology; Tulane University; New Orleans Louisiana 70118
| | - Michael S. Webster
- Department of Neurobiology and Behavior; Cornell University; Ithaca New York 14850
- Macaulay Library; Cornell Lab of Ornithology; Ithaca New York 14853
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21
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Campbell P, Nachman MW. X-y interactions underlie sperm head abnormality in hybrid male house mice. Genetics 2014; 196:1231-40. [PMID: 24504187 PMCID: PMC3982709 DOI: 10.1534/genetics.114.161703] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2013] [Accepted: 01/30/2014] [Indexed: 12/23/2022] Open
Abstract
The genetic basis of hybrid male sterility in house mice is complex, highly polygenic, and strongly X linked. Previous work suggested that there might be interactions between the Mus musculus musculus X and the M. m. domesticus Y with a large negative effect on sperm head morphology in hybrid males with an F1 autosomal background. To test this, we introgressed the M. m. domesticus Y onto a M. m. musculus background and measured the change in sperm morphology, testis weight, and sperm count across early backcross generations and in 11th generation backcross males in which the opportunity for X-autosome incompatibilities is effectively eliminated. We found that abnormality in sperm morphology persists in M. m. domesticus Y introgression males, and that this phenotype is rescued by M. m. domesticus introgressions on the X chromosome. In contrast, the severe reductions in testis weight and sperm count that characterize F1 males were eliminated after one generation of backcrossing. These results indicate that X-Y incompatibilities contribute specifically to sperm morphology. In contrast, X-autosome incompatibilities contribute to low testis weight, low sperm count, and sperm morphology. Restoration of normal testis weight and sperm count in first generation backcross males suggests that a small number of complex incompatibilities between loci on the M. m. musculus X and the M. m. domesticus autosomes underlie F1 male sterility. Together, these results provide insight into the genetic architecture of F1 male sterility and help to explain genome-wide patterns of introgression across the house mouse hybrid zone.
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Affiliation(s)
- Polly Campbell
- Corresponding author: Department of Zoology, 508 Life Sciences West, Oklahoma State University, Stillwater, OK 74078. E-mail:
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22
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Beysard M, Heckel G. Structure and dynamics of hybrid zones at different stages of speciation in the common vole (Microtus arvalis). Mol Ecol 2014; 23:673-87. [DOI: 10.1111/mec.12613] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2013] [Revised: 11/21/2013] [Accepted: 11/25/2013] [Indexed: 11/30/2022]
Affiliation(s)
- Mathias Beysard
- Computational and Molecular Population Genetics; Institute of Ecology and Evolution; University of Bern; CH 3012 Bern Switzerland
- Swiss Institute of Bioinformatics; Genopode CH 1015 Lausanne Switzerland
| | - Gerald Heckel
- Computational and Molecular Population Genetics; Institute of Ecology and Evolution; University of Bern; CH 3012 Bern Switzerland
- Swiss Institute of Bioinformatics; Genopode CH 1015 Lausanne Switzerland
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23
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Larson EL, White TA, Ross CL, Harrison RG. Gene flow and the maintenance of species boundaries. Mol Ecol 2013; 23:1668-78. [DOI: 10.1111/mec.12601] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Erica L. Larson
- Department of Ecology and Evolutionary Biology; Cornell University; Ithaca NY 14853 USA
- Division of Biological Sciences; University of Montana; Missoula MT 59812 USA
| | - Thomas A. White
- Department of Ecology and Evolutionary Biology; Cornell University; Ithaca NY 14853 USA
- CMPG Lab; Institute of Ecology and Evolution; University of Bern; Baltzerstrasse 6 3012 Bern Switzerland
| | - Charles L. Ross
- School of Natural Science; Hampshire College; Amherst MA 01002 USA
| | - Richard G. Harrison
- Department of Ecology and Evolutionary Biology; Cornell University; Ithaca NY 14853 USA
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24
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Latour Y, Perriat-Sanguinet M, Caminade P, Boursot P, Smadja CM, Ganem G. Sexual selection against natural hybrids may contribute to reinforcement in a house mouse hybrid zone. Proc Biol Sci 2013; 281:20132733. [PMID: 24352947 DOI: 10.1098/rspb.2013.2733] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Sexual selection may hinder gene flow across contact zones when hybrid recognition signals are discriminated against. We tested this hypothesis in a unimodal hybrid zone between Mus musculus musculus and Mus musculus domesticus where a pattern of reinforcement was described and lower hybrid fitness documented. We presented mice from the border of the hybrid zone with a choice between opposite sex urine from the same subspecies versus hybrids sampled in different locations across the zone. While no preference was evidenced in domesticus mice, musculus males discriminated in favour of musculus signals and against hybrid signals. Remarkably, the pattern of hybrid unattractiveness did not vary across the hybrid zone. Moreover, allopatric populations tested in the same conditions did not discriminate against hybrid signals, indicating character displacement for signal perception or preference. Finally, habituation-discrimination tests assessing similarities between signals pointed out that hybrid signals differed from the parental ones. Overall, our results suggest that perception of hybrids as unattractive has evolved in border populations of musculus after the secondary contact with domesticus. We discuss the mechanisms involved in hybrid unattractiveness, and the potential impact of asymmetric sexual selection on the hybrid zone dynamics and gene flow between the two subspecies.
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Affiliation(s)
- Yasmin Latour
- CNRS, Institut des Sciences de l'Evolution de Montpellier, UMR5554, , Université Montpellier 2, Montpellier, France
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25
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The genetic architecture of chemosensory cues involved in species recognition: a behavioral approach in the house mouse. Behav Genet 2013; 44:56-67. [PMID: 24158628 DOI: 10.1007/s10519-013-9621-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2013] [Accepted: 10/08/2013] [Indexed: 01/10/2023]
Abstract
The genetics of chemical signals is poorly understood. We addressed this issue in two subspecies of mice, Mus musculus musculus and M. m. domesticus, comparing their odor phenotypes with that of their hybrids. Earlier studies indicated that these subspecies could be discriminated on the basis of their urinary odor. We assessed male odor phenotypes from perception of musculus mice acting as olfactometers. Our results point to a complex genetic determinism. Reciprocal F1 hybrids produced a distinct odor phenotype, with shared characteristics distinguishing them from their parents, and stronger similarity to domesticus than to musculus. These results are consistent with implications of genes with partial dominance and a parent of origin effect. Further, similarities between reciprocal F2 allowed us to reject a direct role of the Y-chromosome in shaping the odor phenotype. However we show that the X-chromosome could be involved in explaining domesticus phenotype, while epistasis between genes on the sex chromosomes and the autosomes might influence musculus phenotype.
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26
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Carneiro M, Baird SJE, Afonso S, Ramirez E, Tarroso P, Teotónio H, Villafuerte R, Nachman MW, Ferrand N. Steep clines within a highly permeable genome across a hybrid zone between two subspecies of the European rabbit. Mol Ecol 2013; 22:2511-25. [PMID: 23530594 DOI: 10.1111/mec.12272] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2012] [Revised: 01/09/2013] [Accepted: 01/11/2013] [Indexed: 11/27/2022]
Abstract
Maintenance of genetic distinction in the face of gene flow is an important aspect of the speciation process. Here, we provide a detailed spatial and genetic characterization of a hybrid zone between two subspecies of the European rabbit. We examined patterns of allele frequency change for 22 markers located on the autosomes, X-chromosome, Y-chromosome and mtDNA in 1078 individuals sampled across the hybrid zone. While some loci revealed extremely wide clines (w ≥ 300 km) relative to an estimated dispersal of 1.95-4.22 km/generation, others showed abrupt transitions (w ≈ 10 km), indicating localized genomic regions of strong selection against introgression. The subset of loci showing steep clines had largely coincident centers and stepped changes in allele frequency that did not co-localize with any physical barrier or ecotone, suggesting that the rabbit hybrid zone is a tension zone. The steepest clines were for X- and Y-chromosome markers. Our results are consistent with previous inference based on DNA sequence variation of individuals sampled in allopatry in suggesting that a large proportion of each genome has escaped the overall barrier to gene flow in the middle of the hybrid zone. These results imply an old history of hybridization and high effective gene flow and anticipate that isolation factors should often localize to small genomic regions.
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Affiliation(s)
- Miguel Carneiro
- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Campus Agrário de Vairão, Universidade do Porto, Vairão, Portugal.
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27
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Sex-specific clines support incipient speciation in a common European mammal. Heredity (Edinb) 2013; 110:398-404. [PMID: 23340600 DOI: 10.1038/hdy.2012.124] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Hybrid zones provide excellent opportunities to study processes and mechanisms underlying reproductive isolation and speciation. Here we investigated sex-specific clines of molecular markers in hybrid zones of morphologically cryptic yet genetically highly-diverged evolutionary lineages of the European common vole (Microtus arvalis). We analyzed the position and width of four secondary contact zones along three independent transects in the region of the Alps using maternally (mitochondrial DNA) and paternally (Y-chromosome) inherited genetic markers. Given male-biased dispersal in the common vole, a selectively neutral secondary contact would show broader paternal marker clines than maternal ones. In a selective case, for example, involving a form of Haldane's rule, Y-chromosomal clines would not be expected to be broader than maternal markers because they are transmitted by the heterogametic sex and thus gene flow would be restricted. Consistent with the selective case, paternal clines were significantly narrower or at most equal in width to maternal clines in all contact zones. In addition, analyses using maximum likelihood cline-fitting detected a shift of paternal relative to maternal clines in three of four contact zones. These patterns suggest that processes at the contact zones in the common vole are not selectively neutral, and that partial reproductive isolation is already established between these evolutionary lineages. We conclude that hybrid zone movement, sexual selection and/or genetic incompatibilities are likely associated with an unusual unidirectional manifestation of Haldane's rule in this common European mammal.
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28
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Albrechtová J, Albrecht T, Baird SJE, Macholán M, Rudolfsen G, Munclinger P, Tucker PK, Piálek J. Sperm-related phenotypes implicated in both maintenance and breakdown of a natural species barrier in the house mouse. Proc Biol Sci 2012; 279:4803-10. [PMID: 23055063 PMCID: PMC3497091 DOI: 10.1098/rspb.2012.1802] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2012] [Accepted: 09/19/2012] [Indexed: 11/12/2022] Open
Abstract
The house mouse hybrid zone (HMHZ) is a species barrier thought to be maintained by a balance between dispersal and natural selection against hybrids. While the HMHZ is characterized by frequency discontinuities for some sex chromosome markers, there is an unexpected large-scale regional introgression of a Y chromosome across the barrier, in defiance of Haldane's rule. Recent work suggests that a major force maintaining the species barrier acts through sperm traits. Here, we test whether the Y chromosome penetration of the species barrier acts through sperm traits by assessing sperm characteristics of wild-caught males directly in a field laboratory set up in a Y introgression region of the HMHZ, later calculating the hybrid index of each male using 1401 diagnostic single nucleotide polymorphisms (SNPs). We found that both sperm count (SC) and sperm velocity were significantly reduced across the natural spectrum of hybrids. However, SC was more than rescued in the presence of the invading Y. Our results imply an asymmetric advantage for Y chromosome introgression consistent with the observed large-scale introgression. We suggest that selection on sperm-related traits probably explains a large component of patterns observed in the natural hybrid zone, including the Y chromosome penetration.
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Affiliation(s)
- Jana Albrechtová
- Department of Population Biology, Institute of Vertebrate Biology, Academy of Sciences of the Czech Republic, Brno and Studenec, Czech Republic
- Department of Zoology, Faculty of Science, Charles University in Prague, Prague, Czech Republic
| | - Tomáš Albrecht
- Department of Population Biology, Institute of Vertebrate Biology, Academy of Sciences of the Czech Republic, Brno and Studenec, Czech Republic
- Department of Zoology, Faculty of Science, Charles University in Prague, Prague, Czech Republic
| | | | - Miloš Macholán
- Laboratory of Mammalian Evolutionary Genetics, Institute of Animal Physiology and Genetics, ASCR, Brno, Czech Republic
| | - Geir Rudolfsen
- Department for Environmental Radioactivity, Norwegian Radiation Protection Authority, Framcenter, Tromsø, Norway
| | - Pavel Munclinger
- Department of Zoology, Faculty of Science, Charles University in Prague, Prague, Czech Republic
| | - Priscilla K. Tucker
- Department of Ecology and Evolutionary Biology and Museum of Zoology, University of Michigan, Ann Arbor, MI, USA
| | - Jaroslav Piálek
- Department of Population Biology, Institute of Vertebrate Biology, Academy of Sciences of the Czech Republic, Brno and Studenec, Czech Republic
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29
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Ďureje Ľ, Macholán M, Baird SJE, Piálek J. The mouse hybrid zone in Central Europe: from morphology to molecules. FOLIA ZOOLOGICA 2012. [DOI: 10.25225/fozo.v61.i3.a13.2012] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Ľudovít Ďureje
- Institute of Vertebrate Biology, Academy of Sciences of the Czech Republic, v.v.i., Květná 8, 603 65 Brno, Czech Republic
| | - Miloš Macholán
- Laboratory of Mammalian Evolutionary Genetics, Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, v.v.i., Veveří 97, 602 00 Brno, Czech Republic
| | - Stuart J. E. Baird
- Institute of Vertebrate Biology, Academy of Sciences of the Czech Republic, v.v.i., Květná 8, 603 65 Brno, Czech Republic
- CIBIO, University of Porto, Campus Agrário de Vairão, Vairão, Portugal
| | - Jaroslav Piálek
- Institute of Vertebrate Biology, Academy of Sciences of the Czech Republic, v.v.i., Květná 8, 603 65 Brno, Czech Republic
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30
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Hiadlovská Z, Strnadová M, Macholán M, Bímová BV. Is water really a barrier for the house mouse? A comparative study of two mouse subspecies. FOLIA ZOOLOGICA 2012. [DOI: 10.25225/fozo.v61.i3.a14.2012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Zuzana Hiadlovská
- Laboratory of Mammalian Evolutionary Genetics, Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, v.v.i., Veveří 97, 602 00 Brno, Czech Republic
- Institute of Botany and Zoology, Faculty of Sciences, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic
| | - Markéta Strnadová
- Laboratory of Mammalian Evolutionary Genetics, Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, v.v.i., Veveří 97, 602 00 Brno, Czech Republic
- Institute of Botany and Zoology, Faculty of Sciences, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic
| | - Miloš Macholán
- Laboratory of Mammalian Evolutionary Genetics, Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, v.v.i., Veveří 97, 602 00 Brno, Czech Republic
| | - Barbora Vošlajerová Bímová
- Laboratory of Mammalian Evolutionary Genetics, Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, v.v.i., Veveří 97, 602 00 Brno, Czech Republic
- Institute of Vertebrate Biology, Academy of Sciences of the Czech Republic, v.v.i., Květná 8, 603 65 Brno, Czech Republic
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31
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Macholán M, Vyskočilová MM, Bejček V, Šťastný K. Mitochondrial DNA sequence variation and evolution of Old World house mice (Mus musculus). FOLIA ZOOLOGICA 2012. [DOI: 10.25225/fozo.v61.i3.a12.2012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Miloš Macholán
- Laboratory of Mammalian Evolutionary Genetics, Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, v.v.i., Veveří 97, 602 00 Brno, Czech Republic
| | - Martina Mrkvicová Vyskočilová
- Laboratory of Mammalian Evolutionary Genetics, Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, v.v.i., Veveří 97, 602 00 Brno, Czech Republic
| | - Vladimír Bejček
- Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences, Kamýcká 129, 165 21 Prague, Czech Republic
| | - Karel Šťastný
- Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences, Kamýcká 129, 165 21 Prague, Czech Republic
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Espregueira Themudo G, Nieman AM, Arntzen JW. Is dispersal guided by the environment? A comparison of interspecific gene flow estimates among differentiated regions of a newt hybrid zone. Mol Ecol 2012; 21:5324-35. [DOI: 10.1111/mec.12026] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2011] [Revised: 07/19/2012] [Accepted: 08/08/2012] [Indexed: 11/28/2022]
Affiliation(s)
| | - A. M. Nieman
- Naturalis Biodiversity Center; P. O. Box 9517; 2300 RA; Leiden; The Netherlands
| | - J. W. Arntzen
- Naturalis Biodiversity Center; P. O. Box 9517; 2300 RA; Leiden; The Netherlands
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Renaud S, Alibert P, Auffray JC. Modularity as a source of new morphological variation in the mandible of hybrid mice. BMC Evol Biol 2012; 12:141. [PMID: 22873779 PMCID: PMC3506452 DOI: 10.1186/1471-2148-12-141] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2012] [Accepted: 07/17/2012] [Indexed: 12/02/2022] Open
Abstract
Background Hybridization is often seen as a process dampening phenotypic differences accumulated between diverging evolutionary units. For a complex trait comprising several relatively independent modules, hybridization may however simply generate new phenotypes, by combining into a new mosaic modules inherited from each parental groups and parts intermediate with respect to the parental groups. We tested this hypothesis by studying mandible size and shape in a set of first and second generation hybrids resulting from inbred wild-derived laboratory strains documenting two subspecies of house mice, Musmusculus domesticus and Musmusculus musculus. Phenotypic variation of the mandible was divided into nested partitions of developmental, evolutionary and functional modules. Results The size and shape of the modules were differently influenced by hybridization. Some modules seemed to be the result of typical additive effects with hybrids intermediate between parents, some displayed a pattern expected in the case of monogenic dominance, whereas in other modules, hybrids were transgressive. The result is interpreted as the production of novel mandible morphologies. Beyond this modularity, modules in functional interaction tended to display significant covariations. Conclusions Modularity emerges as a source of novel morphological variation by its simple potential to combine different parts of the parental phenotypes into a novel offspring mosaic of modules. This effect is partly counterbalanced by bone remodeling insuring an integration of the mosaic mandible into a functional ensemble, adding a non-genetic component to the production of transgressive phenotypes in hybrids.
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Affiliation(s)
- Sabrina Renaud
- Laboratoire de Biométrie et Biologie Evolutive, UMR 5558, CNRS, Université Lyon 1, 69622, Villeurbanne, France.
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White MA, Stubbings M, Dumont BL, Payseur BA. Genetics and evolution of hybrid male sterility in house mice. Genetics 2012; 191:917-34. [PMID: 22554891 PMCID: PMC3389984 DOI: 10.1534/genetics.112.140251] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2012] [Accepted: 04/23/2012] [Indexed: 12/12/2022] Open
Abstract
Comparative genetic mapping provides insights into the evolution of the reproductive barriers that separate closely related species. This approach has been used to document the accumulation of reproductive incompatibilities over time, but has only been applied to a few taxa. House mice offer a powerful system to reconstruct the evolution of reproductive isolation between multiple subspecies pairs. However, studies of the primary reproductive barrier in house mice-hybrid male sterility-have been restricted to a single subspecies pair: Mus musculus musculus and Mus musculus domesticus. To provide a more complete characterization of reproductive isolation in house mice, we conducted an F(2) intercross between wild-derived inbred strains from Mus musculus castaneus and M. m. domesticus. We identified autosomal and X-linked QTL associated with a range of hybrid male sterility phenotypes, including testis weight, sperm density, and sperm morphology. The pseudoautosomal region (PAR) was strongly associated with hybrid sterility phenotypes when heterozygous. We compared QTL found in this cross with QTL identified in a previous F(2) intercross between M. m. musculus and M. m. domesticus and found three shared autosomal QTL. Most QTL were not shared, demonstrating that the genetic basis of hybrid male sterility largely differs between these closely related subspecies pairs. These results lay the groundwork for identifying genes responsible for the early stages of speciation in house mice.
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Affiliation(s)
| | - Maria Stubbings
- Laboratory of Genetics, University of Wisconsin, Madison, Wisconsin 53706
| | | | - Bret A. Payseur
- Laboratory of Genetics, University of Wisconsin, Madison, Wisconsin 53706
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Janoušek V, Wang L, Luzynski K, Dufková P, Vyskočilová MM, Nachman MW, Munclinger P, Macholán M, Piálek J, Tucker PK. Genome-wide architecture of reproductive isolation in a naturally occurring hybrid zone between Mus musculus musculus and M. m. domesticus. Mol Ecol 2012; 21:3032-47. [PMID: 22582810 PMCID: PMC3872452 DOI: 10.1111/j.1365-294x.2012.05583.x] [Citation(s) in RCA: 111] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Studies of a hybrid zone between two house mouse subspecies (Mus musculus musculus and M. m. domesticus) along with studies using laboratory crosses reveal a large role for the X chromosome and multiple autosomal regions in reproductive isolation as a consequence of disrupted epistasis in hybrids. One limitation of previous work has been that most of the identified genomic regions have been large. The goal here is to detect and characterize precise genomic regions underlying reproductive isolation. We surveyed 1401 markers evenly spaced across the genome in 679 mice collected from two different transects. Comparisons between transects provide a means for identifying common patterns that likely reflect intrinsic incompatibilities. We used a genomic cline approach to identify patterns that correspond to epistasis. From both transects, we identified contiguous regions on the X chromosome in which markers were inferred to be involved in epistatic interactions. We then searched for autosomal regions showing the same patterns and found they constitute about 5% of autosomal markers. We discovered substantial overlap between these candidate regions underlying reproductive isolation and QTL for hybrid sterility identified in laboratory crosses. Analysis of gene content in these regions suggests a key role for several mechanisms, including the regulation of transcription, sexual conflict and sexual selection operating at both the postmating prezygotic and postzygotic stages of reproductive isolation. Taken together, these results indicate that speciation in two recently diverged (c. 0.5 Ma) house mouse subspecies is complex, involving many genes dispersed throughout the genome and associated with distinct functions.
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Affiliation(s)
- Václav Janoušek
- Department of Zoology, Faculty of Science, Charles University in Prague, Viničná 7, 128 43 Prague 2, Czech Republic
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36
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Nachman MW, Payseur BA. Recombination rate variation and speciation: theoretical predictions and empirical results from rabbits and mice. Philos Trans R Soc Lond B Biol Sci 2012; 367:409-21. [PMID: 22201170 DOI: 10.1098/rstb.2011.0249] [Citation(s) in RCA: 248] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Recently diverged taxa may continue to exchange genes. A number of models of speciation with gene flow propose that the frequency of gene exchange will be lower in genomic regions of low recombination and that these regions will therefore be more differentiated. However, several population-genetic models that focus on selection at linked sites also predict greater differentiation in regions of low recombination simply as a result of faster sorting of ancestral alleles even in the absence of gene flow. Moreover, identifying the actual amount of gene flow from patterns of genetic variation is tricky, because both ancestral polymorphism and migration lead to shared variation between recently diverged taxa. New analytic methods have been developed to help distinguish ancestral polymorphism from migration. Along with a growing number of datasets of multi-locus DNA sequence variation, these methods have spawned a renewed interest in speciation models with gene flow. Here, we review both speciation and population-genetic models that make explicit predictions about how the rate of recombination influences patterns of genetic variation within and between species. We then compare those predictions with empirical data of DNA sequence variation in rabbits and mice. We find strong support for the prediction that genomic regions experiencing low levels of recombination are more differentiated. In most cases, reduced gene flow appears to contribute to the pattern, although disentangling the relative contribution of reduced gene flow and selection at linked sites remains a challenge. We suggest fruitful areas of research that might help distinguish between different models.
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Affiliation(s)
- Michael W Nachman
- Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ 85721, USA.
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37
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Affiliation(s)
- Quinn R. Shurtliff
- Department of Biological Sciences; Idaho State University; Idaho; 83209; USA
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38
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Duvaux L, Belkhir K, Boulesteix M, Boursot P. Isolation and gene flow: inferring the speciation history of European house mice. Mol Ecol 2011; 20:5248-64. [PMID: 22066696 DOI: 10.1111/j.1365-294x.2011.05343.x] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Inferring the history of isolation and gene flow during species differentiation can inform us on the processes underlying their formation. Following their recent expansion in Europe, two subspecies of the house mouse (Mus musculus domesticus and Mus musculus musculus) have formed a hybrid zone maintained by hybrid incompatibilities and possibly behavioural reinforcement, offering a good model of incipient speciation. We reconstruct the history of their divergence using an approximate Bayesian computation framework and sequence variation at 57 autosomal loci. We find support for a long isolation period preceding the advent of gene flow around 200,000 generations ago, much before the formation of the European hybrid zone a few thousand years ago. The duration of the allopatric episode appears long enough (74% of divergence time) to explain the accumulation of many post-zygotic incompatibilities expressed in the present hybrid zone. The ancient contact inferred could have played a role in mating behaviour divergence and laid the ground for further reinforcement. We suggest that both subspecies originally colonized the Middle East from the northern Indian subcontinent, domesticus settling on the shores of the Persian Gulf and musculus on those of the Caspian Sea. Range expansions during interglacials would have induced secondary contacts, presumably in Iran, where they must have also interacted with Mus musculus castaneus. Future studies should incorporate this possibility, and we point to Iran and its surroundings as a hot spot for house mouse diversity and speciation studies.
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Affiliation(s)
- Ludovic Duvaux
- Université Montpellier 2, CNRS UMR 5554, Institut des Sciences de l'Evolution, CC063, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France.
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39
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Geraldes A, Basset P, Smith KL, Nachman MW. Higher differentiation among subspecies of the house mouse (Mus musculus) in genomic regions with low recombination. Mol Ecol 2011; 20:4722-36. [PMID: 22004102 DOI: 10.1111/j.1365-294x.2011.05285.x] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In the early stages of reproductive isolation, genomic regions of reduced recombination are expected to show greater levels of differentiation, either because gene flow between species is reduced in these regions or because the effects of selection at linked sites within species are enhanced in these regions. Here, we study the patterns of DNA sequence variation at 27 autosomal loci among populations of Mus musculus musculus, M. m. domesticus, and M. m. castaneus, three subspecies of house mice with collinear genomes. We found that some loci exhibit considerable shared variation among subspecies, while others exhibit fixed differences. We used an isolation-with-gene-flow model to estimate divergence times and effective population sizes (N(e) ) and to disentangle ancestral variation from gene flow. Estimates of divergence time indicate that all three subspecies diverged from one another within a very short period of time approximately 350,000 years ago. Overall, N(e) for each subspecies was associated with the degree of genetic differentiation: M. m. musculus had the smallest N(e) and the greatest proportion of monophyletic gene genealogies, while M. m. castaneus had the largest N(e) and the smallest proportion of monophyletic gene genealogies. M. m. domesticus and M. m. musculus were more differentiated from each other than either were from M. m. castaneus, consistent with greater reproductive isolation between M. m. domesticus and M. m. musculus. F(ST) was significantly greater at loci experiencing low recombination rates compared to loci experiencing high recombination rates in comparisons between M. m. castaneus and M. m. musculus or M. m. domesticus. These results provide evidence that genomic regions with less recombination show greater differentiation, even in the absence of chromosomal rearrangements.
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Affiliation(s)
- A Geraldes
- Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ 85721, USA
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40
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Gagnaire PA, Minegishi Y, Zenboudji S, Valade P, Aoyama J, Berrebi P. WITHIN-POPULATION STRUCTURE HIGHLIGHTED BY DIFFERENTIAL INTROGRESSION ACROSS SEMIPERMEABLE BARRIERS TO GENE FLOW IN ANGUILLA MARMORATA. Evolution 2011; 65:3413-27. [DOI: 10.1111/j.1558-5646.2011.01404.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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41
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Genetic dissection of a key reproductive barrier between nascent species of house mice. Genetics 2011; 189:289-304. [PMID: 21750261 DOI: 10.1534/genetics.111.129171] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Reproductive isolation between species is often caused by deleterious interactions among loci in hybrids. Finding the genes involved in these incompatibilities provides insight into the mechanisms of speciation. With recently diverged subspecies, house mice provide a powerful system for understanding the genetics of reproductive isolation early in the speciation process. Although previous studies have yielded important clues about the genetics of hybrid male sterility in house mice, they have been restricted to F1 sterility or incompatibilities involving the X chromosome. To provide a more complete characterization of this key reproductive barrier, we conducted an F2 intercross between wild-derived inbred strains from two subspecies of house mice, Mus musculus musculus and Mus musculus domesticus. We identified a suite of autosomal and X-linked QTL that underlie measures of hybrid male sterility, including testis weight, sperm density, and sperm morphology. In many cases, the autosomal loci were unique to a specific sterility trait and exhibited an effect only when homozygous, underscoring the importance of examining reproductive barriers beyond the F1 generation. We also found novel two-locus incompatibilities between the M. m. musculus X chromosome and M. m. domesticus autosomal alleles. Our results reveal a complex genetic architecture for hybrid male sterility and suggest a prominent role for reproductive barriers in advanced generations in maintaining subspecies integrity in house mice.
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42
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Wang L, Luzynski K, Pool JE, Janoušek V, Dufková P, Vyskočilová MM, Teeter KC, Nachman MW, Munclinger P, Macholán M, Piálek J, Tucker PK. Measures of linkage disequilibrium among neighbouring SNPs indicate asymmetries across the house mouse hybrid zone. Mol Ecol 2011; 20:2985-3000. [PMID: 21668551 DOI: 10.1111/j.1365-294x.2011.05148.x] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Theory predicts that naturally occurring hybrid zones between genetically distinct taxa can move over space and time as a result of selection and/or demographic processes, with certain types of hybrid zones being more or less likely to move. Determining whether a hybrid zone is stationary or moving has important implications for understanding evolutionary processes affecting interactions in hybrid populations. However, direct observations of hybrid zone movement are difficult to make unless the zone is moving rapidly. Here, evidence for movement in the house mouse Mus musculus domesticus × Mus musculus musculus hybrid zone is provided using measures of LD and haplotype structure among neighbouring SNP markers from across the genome. Local populations of mice across two transects in Germany and the Czech Republic were sampled, and a total of 1301 mice were genotyped at 1401 markers from the nuclear genome. Empirical measures of LD provide evidence for extinction and (re)colonization in single populations and, together with simulations, suggest hybrid zone movement because of either geography-dependent asymmetrical dispersal or selection favouring one subspecies over the other.
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Affiliation(s)
- Liuyang Wang
- Department of Ecology and Evolutionary Biology and Museum of Zoology, University of Michigan, Ann Arbor MI 48109, USA
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43
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Bímová BV, Macholán M, Baird SJE, Munclinger P, Dufková P, Laukaitis CM, Karn RC, Luzynski K, Tucker PK, Piálek J. Reinforcement selection acting on the European house mouse hybrid zone. Mol Ecol 2011; 20:2403-24. [PMID: 21521395 DOI: 10.1111/j.1365-294x.2011.05106.x] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Behavioural isolation may lead to complete speciation when partial postzygotic isolation acts in the presence of divergent-specific mate-recognition systems. These conditions exist where Mus musculus musculus and M. m. domesticus come into contact and hybridize. We studied two mate-recognition signal systems, based on urinary and salivary proteins, across a Central European portion of the mouse hybrid zone. Introgression of the genomic regions responsible for these signals: the major urinary proteins (MUPs) and androgen binding proteins (ABPs), respectively, was compared to introgression at loci assumed to be nearly neutral and those under selection against hybridization. The preference of individuals taken from across the zone regarding these signals was measured in Y mazes, and we develop a model for the analysis of the transition of such traits under reinforcement selection. The strongest assortative preferences were found in males for urine and females for ABP. Clinal analyses confirm nearly neutral introgression of an Abp locus and two loci closely linked to the Abp gene cluster, whereas two markers flanking the Mup gene region reveal unexpected introgression. Geographic change in the preference traits matches our reinforcement selection model significantly better than standard cline models. Our study confirms that behavioural barriers are important components of reproductive isolation between the house mouse subspecies.
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Affiliation(s)
- Barbora Vošlajerová Bímová
- Department of Population Biology, Institute of Vertebrate Biology, Academy of Sciences of the Czech Republic, Brno, Czech Republic
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44
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Bierne N, Welch J, Loire E, Bonhomme F, David P. The coupling hypothesis: why genome scans may fail to map local adaptation genes. Mol Ecol 2011; 20:2044-72. [PMID: 21476991 DOI: 10.1111/j.1365-294x.2011.05080.x] [Citation(s) in RCA: 336] [Impact Index Per Article: 25.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nicolas Bierne
- Université Montpellier 2, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France.
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45
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JONES ELEANORP, JENSEN JENSKJELD, MAGNUSSEN EYĐFINN, GREGERSEN NOOMI, HANSEN HEIDIS, SEARLE JEREMYB. A molecular characterization of the charismatic Faroe house mouse. Biol J Linn Soc Lond 2011. [DOI: 10.1111/j.1095-8312.2010.01597.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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47
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Macholán M, Baird SJE, Dufková P, Munclinger P, Bímová BV, Piálek J. ASSESSING MULTILOCUS INTROGRESSION PATTERNS: A CASE STUDY ON THE MOUSE X CHROMOSOME IN CENTRAL EUROPE. Evolution 2011; 65:1428-46. [DOI: 10.1111/j.1558-5646.2011.01228.x] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Miloš Macholán
- Laboratory of Mammalian Evolutionary Genetics, Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, Brno, Czech Republic
- E‐mail:
| | | | - Petra Dufková
- Department of Population Biology, Institute of Vertebrate Biology, Academy of Sciences of the Czech Republic, Brno, Czech Republic
- Department of Genetics, Faculty of Science, University of South Bohemia, České Budějovice, Czech Republic
| | - Pavel Munclinger
- Biodiversity Research Group, Department of Zoology, Faculty of Science, Charles University in Prague, Czech Republic
| | - Barbora Vošlajerová Bímová
- Laboratory of Mammalian Evolutionary Genetics, Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, Brno, Czech Republic
- Department of Population Biology, Institute of Vertebrate Biology, Academy of Sciences of the Czech Republic, Brno, Czech Republic
| | - Jaroslav Piálek
- Department of Population Biology, Institute of Vertebrate Biology, Academy of Sciences of the Czech Republic, Brno, Czech Republic
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Dufková P, Macholán M, Piálek J. Inference of selection and stochastic effects in the house mouse hybrid zone. Evolution 2011; 65:993-1010. [PMID: 21463294 DOI: 10.1111/j.1558-5646.2011.01222.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
We explored the transition of 13 X-linked markers across two separate portions of the house mouse hybrid zone, asking whether such a comparison can distinguish the effects of selection from random factors. A heuristic search in the likelihood landscape revealed more complex likelihood profiles for data sampled in two-dimensional (2D) space relative to data sampled along a linear transect. Randomized resampling of localities analyzed for individual loci showed that deletion of sites away from the zone center can decrease cline width estimates whereas deletion of sites close to the center can significantly increase the width estimates. Deleting localities for all loci resulted in wider clines if the number of samples from the center was limited. The results suggest that, given the great variation in width estimates resulting from inclusion/exclusion of sampling sites, the geographic sampling design is important in hybrid zone studies and that our inferences should take into account measures of uncertainty such as support intervals. The comparison of the two transects indicates cline widths are narrower for loci in the central part of the X chromosome, suggesting selection is stronger in this region and genetic incompatibilities may have at least partly common architecture in the house mouse hybrid zone.
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Affiliation(s)
- Petra Dufková
- Institute of Vertebrate Biology, Academy of Science of the Czech Republic, Brno, Czech Republic.
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49
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Schilthuizen M, Giesbers MCWG, Beukeboom LW. Haldane's rule in the 21st century. Heredity (Edinb) 2011; 107:95-102. [PMID: 21224879 DOI: 10.1038/hdy.2010.170] [Citation(s) in RCA: 100] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Haldane's Rule (HR), which states that 'when in the offspring of two different animal races one sex is absent, rare, or sterile, that sex is the heterozygous (heterogametic) sex', is one of the most general patterns in speciation biology. We review the literature of the past 15 years and find that among the ∼85 new studies, many consider taxa that traditionally have not been the focus for HR investigations. The new studies increased to nine, the number of 'phylogenetically independent' groups that comply with HR. They continue to support the dominance and faster-male theories as explanations for HR, although due to increased reliance on indirect data (from, for example, differential introgression of cytoplasmic versus chromosomal loci in natural hybrid zones) unambiguous novel results are rare. We further highlight how research on organisms with sex determination systems different from those traditionally considered may lead to more insight in the underlying causes of HR. In particular, haplodiploid organisms provide opportunities for testing specific predictions of the dominance and faster X chromosome theory, and we present new data that show that the faster-male component of HR is supported in hermaphrodites, suggesting that genes involved in male function may evolve faster than those expressed in the female function.
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Affiliation(s)
- M Schilthuizen
- Netherlands Centre for Biodiversity, Naturalis, Leiden, The Netherlands.
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50
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Dureje L, Bímová BV, Piálek J. No postnatal maternal effect on male aggressiveness in wild-derived strains of house mice. Aggress Behav 2011; 37:48-55. [PMID: 20954263 DOI: 10.1002/ab.20371] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2009] [Accepted: 08/19/2010] [Indexed: 11/07/2022]
Abstract
Male aggressiveness is a complex behavior influenced by a number of genetic and non-genetic factors. Traditionally, the contribution of each of these factors has been established from experiments using artificially selected strains for high/low aggressive phenotypes. However, little is known about the factors underlying aggressive behavior in natural populations. In this study, we assess the influence of genetic background vs. postnatal maternal environment using a set of cross-fostering experiments between two wild-derived inbred strains, displaying high (STRA, derived from Mus musculus domesticus) and low (BUSNA, derived from Mus musculus musculus) levels of aggressiveness. The role of maternal environment was tested in males with the same genetic background (i.e. strain origin) reared under three different conditions: unfostered (weaned by mother), infostered (weaned by an unfamiliar dam from the same strain), and cross-fostered (weaned by a dam from a different strain). All males were tested against non-aggressive opponents from the A/J inbred strain. Resource-holding potential was assessed through body weight gains and territory ownership. The STRA males were shown to be aggressive in both neutral cage and resident-intruder tests. On the contrary, the BUSNA males were less aggressive in all tests. We did not find a significant effect of postnatal maternal environment; however, we detected significant maternal effect on body weight with differences between the strains, fostering type and interactions between these factors. We conclude that the aggressiveness preserved in the two strains has significant genetic component whose genetic basis can be dissected by quantitative trait loci analysis.
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Affiliation(s)
- Ludovít Dureje
- Institute of Vertebrate Biology, Academy of Sciences of the Czech Republic, Brno, Czech Republic
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