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Lukšíková K, Pavlica T, Altmanová M, Štundlová J, Pelikánová Š, Simanovsky SA, Krysanov EY, Jankásek M, Hiřman M, Reichard M, Ráb P, Sember A. Conserved satellite DNA motif and lack of interstitial telomeric sites in highly rearranged African Nothobranchius killifish karyotypes. JOURNAL OF FISH BIOLOGY 2023; 103:1501-1514. [PMID: 37661806 DOI: 10.1111/jfb.15550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 08/27/2023] [Accepted: 08/29/2023] [Indexed: 09/05/2023]
Abstract
Using African annual killifishes of the genus Nothobranchius from temporary savannah pools with rapid karyotype and sex chromosome evolution, we analysed the chromosomal distribution of telomeric (TTAGGG)n repeat and Nfu-SatC satellite DNA (satDNA; isolated from Nothobranchius furzeri) in 15 species across the Nothobranchius killifish phylogeny, and with Fundulosoma thierryi as an out-group. Our fluorescence in situ hybridization experiments revealed that all analysed taxa share the presence of Nfu-SatC repeat but with diverse organization and distribution on chromosomes. Nfu-SatC landscape was similar in conspecific populations of Nothobranchius guentheri and Nothobranchius melanospilus but slightly-to-moderately differed between populations of Nothobranchius pienaari, and between closely related Nothobranchius kuhntae and Nothobranchius orthonotus. Inter-individual variability in Nfu-SatC patterns was found in N. orthonotus and Nothobranchius krysanovi. We revealed mostly no sex-linked patterns of studied repetitive DNA distribution. Only in Nothobranchius brieni, possessing multiple sex chromosomes, Nfu-SatC repeat occupied a substantial portion of the neo-Y chromosome, similarly as formerly found in the XY sex chromosome system of turquoise killifish N. furzeri and its sister species Nothobranchius kadleci-representatives not closely related to N. brieni. All studied species further shared patterns of expected telomeric repeats at the ends of all chromosomes and no additional interstitial telomeric sites. In summary, we revealed (i) the presence of conserved satDNA class in Nothobranchius clades (a rare pattern among ray-finned fishes); (ii) independent trajectories of Nothobranchius sex chromosome differentiation, with recurrent and convergent accumulation of Nfu-SatC on the Y chromosome in some species; and (iii) genus-wide shared tendency to loss of telomeric repeats during interchromosomal rearrangements. Collectively, our findings advance our understanding of genome structure, mechanisms of karyotype reshuffling, and sex chromosome differentiation in Nothobranchius killifishes from the genus-wide perspective.
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Affiliation(s)
- Karolína Lukšíková
- Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Liběchov, Czech Republic
- Department of Genetics and Microbiology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Tomáš Pavlica
- Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Liběchov, Czech Republic
- Department of Zoology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Marie Altmanová
- Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Liběchov, Czech Republic
- Department of Ecology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Jana Štundlová
- Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Liběchov, Czech Republic
- University of South Bohemia, Faculty of Science, České Budějovice, Czech Republic
| | - Šárka Pelikánová
- Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Liběchov, Czech Republic
| | - Sergey A Simanovsky
- Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Moscow, Russia
| | - Eugene Yu Krysanov
- Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Moscow, Russia
| | - Marek Jankásek
- Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Liběchov, Czech Republic
- Department of Zoology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Matyáš Hiřman
- Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Liběchov, Czech Republic
- Department of Zoology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Martin Reichard
- Institute of Vertebrate Biology, Czech Academy of Sciences, Czech Republic
- Department of Ecology and Vertebrate Zoology, University of Łódź, Łódź, Poland
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Petr Ráb
- Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Liběchov, Czech Republic
| | - Alexandr Sember
- Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Liběchov, Czech Republic
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2
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Araújo MDS, Aragão WFLD, Santos SPD, Freitas TKT, Saraiva VDC, Damasceno-Silva KJ, Dias LADS, Rocha MDM. Evaluation of adaptability and stability for iron, zinc and protein content in cowpea genotypes using GGE biplot approach. Heliyon 2022; 8:e11832. [PMID: 36506391 PMCID: PMC9732134 DOI: 10.1016/j.heliyon.2022.e11832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 06/26/2022] [Accepted: 11/16/2022] [Indexed: 12/05/2022] Open
Abstract
Cowpea is a widely cultivated crop in the world. Biofortification strategies aim to reduce mineral and protein deficiencies, especially among the poorest people. The aim of this study was to estimate adaptability and stability of cowpea genotypes for iron, zinc and protein contents, through GGE biplot analysis. Twenty cowpea genotypes were evaluated in the municipalities of Piauí Monsenhor Hipólito, Pio IX and São Miguel do Tapuio, under rainfed conditions. The experimental design was a randomized block design with four replications. The traits evaluated were grain yield, iron, zinc and protein contents in dry grains. Iron (Fe) and zinc (Zn) were determined by flame atomic absorption spectrophotometer, and protein contents by Kjeldahl methods. Adaptability and stability were evaluated by GGE biplot analyses. The means of the experiments were 1,209.1 kg ha-1, 51.1 mg kg-1, 46.8 mg kg-1 and 24.3% for grain yield, Fe, Zn and protein contents, respectively. The joint analysis of variance showed significant difference (p < 0.05) for the effect of interaction genotypes by environments for Fe, Zn and protein contents. The lines G6 and G8 were the most promising for grain yield, mineral and protein content through adaptability and stability by GGE biplot approach.
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Affiliation(s)
- Maurício dos Santos Araújo
- Universidade Federal de Viçosa, Departamento de Agronomia, 36570-900, Viçosa, Minas Gerais, Brazil
- Universidade Federal do Piauí, Departamento de Fitotecnia, 64049-550, Teresina, Piauí, Brazil
- Corresponding author.
| | | | | | | | | | | | | | - Maurisrael de Moura Rocha
- Empresa Brasileira de Pesquisa Agropecuária, (Embrapa Meio-Norte), 64008-780, Teresina, Piauí, Brazil
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Muller-Girard M, Fowles G, Duchamp J, Kouneski S, Mollohan C, Smyser TJ, Turner GG, Westrich B, Doyle JM. A novel SNP assay reveals increased genetic variability and abundance following translocations to a remnant Allegheny woodrat population. BMC Ecol Evol 2022; 22:137. [PMID: 36418951 PMCID: PMC9686018 DOI: 10.1186/s12862-022-02083-w] [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: 01/26/2022] [Accepted: 10/19/2022] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND Allegheny woodrats (Neotoma magister) are found in metapopulations distributed throughout the Interior Highlands and Appalachia. Historically these metapopulations persisted as relatively fluid networks, enabling gene flow between subpopulations and recolonization of formerly extirpated regions. However, over the past 45 years, the abundance of Allegheny woodrats has declined throughout the species' range due to a combination of habitat destruction, declining hard mast availability, and roundworm parasitism. In an effort to initiate genetic rescue of a small, genetically depauperate subpopulation in New Jersey, woodrats were translocated from a genetically robust population in Pennsylvania (PA) in 2015, 2016 and 2017. Herein, we assess the efficacy of these translocations to restore genetic diversity within the recipient population. RESULTS We designed a novel 134 single nucleotide polymorphism panel, which was used to genotype the six woodrats translocated from PA and 82 individuals from the NJ population captured before and after the translocation events. These data indicated that a minimum of two translocated individuals successfully produced at least 13 offspring, who reproduced as well. Further, population-wide observed heterozygosity rose substantially following the first set of translocations, reached levels comparable to that of populations in Indiana and Ohio, and remained elevated over the subsequent years. Abundance also increased during the monitoring period, suggesting Pennsylvania translocations initiated genetic rescue of the New Jersey population. CONCLUSIONS Our results indicate, encouragingly, that very small numbers of translocated individuals can successfully restore the genetic diversity of a threatened population. Our work also highlights the challenges of managing very small populations, such as when translocated individuals have greater reproductive success relative to residents. Finally, we note that ongoing work with Allegheny woodrats may broadly shape our understanding of genetic rescue within metapopulations and across heterogeneous landscapes.
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Affiliation(s)
- Megan Muller-Girard
- grid.265122.00000 0001 0719 7561Department of Environmental Science and Studies, Towson University, 8000 York Rd, Baltimore, MD 21252 USA
| | - Gretchen Fowles
- Endangered and Nongame Species Program, New Jersey DEP Fish and Wildlife, 1255 County Rd 629, Lebanon, NJ 08833 USA
| | - Joseph Duchamp
- grid.257427.10000000088740847Department of Biology, Indiana University of Pennsylvania, 975 Oakland Avenue, Indiana, PA 15705-1081 USA
| | - Samantha Kouneski
- grid.265122.00000 0001 0719 7561Department of Biological Sciences, Towson University, 8000 York Rd, Baltimore, MD 21252 USA
| | | | - Timothy J. Smyser
- grid.413759.d0000 0001 0725 8379USDA-APHIS-WS National Wildlife Research Center, Fort Collins, CO USA
| | - Gregory G. Turner
- Pennsylvania Game Commission, 2001 Elmerton Avenue, Harrisburg, PA 17110 USA
| | - Bradford Westrich
- grid.448453.a0000 0004 1130 5264Indiana Department of Natural Resources, 5596 East State Road 46, Bloomington, IN 47401 USA
| | - Jacqueline M. Doyle
- grid.265122.00000 0001 0719 7561Department of Biological Sciences, Towson University, 8000 York Rd, Baltimore, MD 21252 USA
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Charmouh AP, Reid JM, Bilde T, Bocedi G. Eco-evolutionary extinction and recolonization dynamics reduce genetic load and increase time to extinction in highly inbred populations. Evolution 2022; 76:2482-2497. [PMID: 36117269 PMCID: PMC9828521 DOI: 10.1111/evo.14620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 06/01/2022] [Accepted: 07/11/2022] [Indexed: 01/22/2023]
Abstract
Understanding how genetic and ecological effects can interact to shape genetic loads within and across local populations is key to understanding ongoing persistence of systems that should otherwise be susceptible to extinction through mutational meltdown. Classic theory predicts short persistence times for metapopulations comprising small local populations with low connectivity, due to accumulation of deleterious mutations. Yet, some such systems have persisted over evolutionary time, implying the existence of mechanisms that allow metapopulations to avoid mutational meltdown. We first hypothesize a mechanism by which the combination of stochasticity in the numbers and types of mutations arising locally (genetic stochasticity), resulting local extinction, and recolonization through evolving dispersal facilitates metapopulation persistence. We then test this mechanism using a spatially and genetically explicit individual-based model. We show that genetic stochasticity in highly structured metapopulations can result in local extinctions, which can favor increased dispersal, thus allowing recolonization of empty habitat patches. This causes fluctuations in metapopulation size and transient gene flow, which reduces genetic load and increases metapopulation persistence over evolutionary time. Our suggested mechanism and simulation results provide an explanation for the conundrum presented by the continued persistence of highly structured populations with inbreeding mating systems that occur in diverse taxa.
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Affiliation(s)
- Anders P. Charmouh
- School of Biological SciencesUniversity of AberdeenAberdeenAB24 2TZUnited Kingdom
| | - Jane M. Reid
- School of Biological SciencesUniversity of AberdeenAberdeenAB24 2TZUnited Kingdom,Centre for Biodiversity DynamicsInstitutt for Biologi, NTNUTrondheim7491Norway
| | - Trine Bilde
- Department of BiologyAarhus UniversityAarhus C8000Denmark
| | - Greta Bocedi
- School of Biological SciencesUniversity of AberdeenAberdeenAB24 2TZUnited Kingdom
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Spatially structured eco-evolutionary dynamics in a host-pathogen interaction render isolated populations vulnerable to disease. Nat Commun 2022; 13:6018. [PMID: 36229442 PMCID: PMC9561709 DOI: 10.1038/s41467-022-33665-3] [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: 02/04/2022] [Accepted: 09/27/2022] [Indexed: 11/08/2022] Open
Abstract
While the negative effects that pathogens have on their hosts are well-documented in humans and agricultural systems, direct evidence of pathogen-driven impacts in wild host populations is scarce and mixed. Here, to determine how the strength of pathogen-imposed selection depends on spatial structure, we analyze growth rates across approximately 4000 host populations of a perennial plant through time coupled with data on pathogen presence-absence. We find that infection decreases growth more in the isolated than well-connected host populations. Our inoculation study reveals isolated populations to be highly susceptible to disease while connected host populations support the highest levels of resistance diversity, regardless of their disease history. A spatial eco-evolutionary model predicts that non-linearity in the costs to resistance may be critical in determining this pattern. Overall, evolutionary feedbacks define the ecological impacts of disease in spatially structured systems with host gene flow being more important than disease history in determining the outcome.
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6
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Kusuma YWC, Matsuo A, Suyama Y, Wanke S, Isagi Y. Conservation genetics of three Rafflesia species in Java Island, Indonesia using SNP markers obtained from MIG-seq. CONSERV GENET 2022. [DOI: 10.1007/s10592-022-01470-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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DiLeo MF, Nonaka E, Husby A, Saastamoinen M. Effects of environment and genotype on dispersal differ across departure, transfer and settlement in a butterfly metapopulation. Proc Biol Sci 2022; 289:20220322. [PMID: 35673865 PMCID: PMC9174707 DOI: 10.1098/rspb.2022.0322] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Active dispersal is driven by extrinsic and intrinsic factors at the three stages of departure, transfer and settlement. Most empirical studies capture only one stage of this complex process, and knowledge of how much can be generalized from one stage to another remains unknown. Here we use genetic assignment tests to reconstruct dispersal across 5 years and 232 habitat patches of a Glanville fritillary butterfly (Melitaea cinxia) metapopulation. We link individual dispersal events to weather, landscape structure, size and quality of habitat patches, and individual genotype to identify the factors that influence the three stages of dispersal and post-settlement survival. We found that nearly all tested factors strongly affected departure probabilities, but that the same factors explained very little variation in realized dispersal distances. Surprisingly, we found no effect of dispersal distance on post-settlement survival. Rather, survival was influenced by weather conditions, quality of the natal habitat patch, and a strong interaction between genotype and occupancy status of the settled habitat patch, with more mobile genotypes having higher survival as colonists rather than as immigrants. Our work highlights the multi-causality of dispersal and that some dispersal costs can only be understood by considering extrinsic and intrinsic factors and their interaction across the entire dispersal process.
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Affiliation(s)
- Michelle F. DiLeo
- Research Centre for Ecological Change, Organismal and Evolutionary Biology Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finland,Ontario Ministry of Northern Development, Mines, Natural Resources and Forestry, Peterborough, ON, Canada
| | - Etsuko Nonaka
- Department of Biological and Environmental Sciences, University of Jyväskylä, Jyväskylä, Finland
| | - Arild Husby
- Evolutionary Biology, Department of Ecology and Genetics, Uppsala University, Uppsala, Sweden
| | - Marjo Saastamoinen
- Research Centre for Ecological Change, Organismal and Evolutionary Biology Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finland,Helsinki Institute of Life Science, University of Helsinki, Helsinki, Finland
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8
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De Ro A, Vanden Broeck A, Verschaeve L, Jacobs I, T'Jollyn F, Van Dyck H, Maes D. Occasional long-distance dispersal may not prevent inbreeding in a threatened butterfly. BMC Ecol Evol 2021; 21:224. [PMID: 34961479 PMCID: PMC8711176 DOI: 10.1186/s12862-021-01953-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 12/06/2021] [Indexed: 11/17/2022] Open
Abstract
Background To set up successful conservation measures, detailed knowledge on the dispersal and colonization capacities of the focal species and connectivity between populations is of high relevance. We developed species-specific nuclear microsatellite molecular markers for the grayling (Hipparchia semele), a butterfly endemic to Europe and of growing conservation concern in North-West Europe, and report on its population genetics, in a fragmented, anthropogenic landscape in Belgium. Our study included samples from 23 different locations nested in two regions and additional historical samples from two locations. We assessed contemporary, long-distance dispersal based on genetic assignment tests and investigated the effect of habitat loss and fragmentation on the population genetic structure and genetic variation using data of nine microsatellite loci. Results Detected dispersal events covered remarkably long distances, which were up to ten times larger than previously reported colonisation distances, with the longest movement recorded in this study even exceeding 100 km. However, observed frequencies of long-distance dispersal were low. Our results point to the consequences of the strong population decline of the last decades, with evidence of inbreeding for several of the recently sampled populations and low estimates of effective population sizes (Ne) (ranging from 20 to 54 individuals). Conclusions Our study shows low frequencies of long-distance dispersal, which is unable to prevent inbreeding in most of the local populations. We discuss the significance for species conservation including future translocation events and discuss appropriate conservation strategies to maintain viable grayling (meta) populations in highly fragmented, anthropogenic landscapes. Supplementary Information The online version contains supplementary material available at 10.1186/s12862-021-01953-z.
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Affiliation(s)
- Annelore De Ro
- Research Institute for Nature and Forest (INBO), Gaverstraat 4, B-9500, Geraardsbergen, Belgium.
| | - An Vanden Broeck
- Research Institute for Nature and Forest (INBO), Gaverstraat 4, B-9500, Geraardsbergen, Belgium
| | - Leen Verschaeve
- Research Institute for Nature and Forest (INBO), Gaverstraat 4, B-9500, Geraardsbergen, Belgium
| | - Ilf Jacobs
- Natuurpunt Studie, Coxiestraat 11, B-2800, Mechelen, Belgium
| | - Filiep T'Jollyn
- Research Institute for Nature and Forest (INBO), Herman Teirlinckgebouw, Havenlaan 88 box 73, B-1000, Brussels, Belgium
| | - Hans Van Dyck
- Behavioural Ecology and Conservation Group, Biodiversity Research Centre, Earth and Life Institute, Université Catholique de Louvain (UCLouvain), Croix du Sud 4-5, B-1348, Louvain-la-Neuve, Belgium
| | - Dirk Maes
- Research Institute for Nature and Forest (INBO), Herman Teirlinckgebouw, Havenlaan 88 box 73, B-1000, Brussels, Belgium
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9
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Sherpa S, Kebaïli C, Rioux D, Guéguen M, Renaud J, Després L. Population decline at distribution margins: Assessing extinction risk in the last glacial relictual but still functional metapopulation of a European butterfly. DIVERS DISTRIB 2021. [DOI: 10.1111/ddi.13460] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Affiliation(s)
- Stéphanie Sherpa
- Laboratoire d'Ecologie Alpine UMR CNRS‐UGA‐USMB 5553 Université Grenoble Alpes Grenoble Cedex 9 France
| | - Caroline Kebaïli
- Laboratoire d'Ecologie Alpine UMR CNRS‐UGA‐USMB 5553 Université Grenoble Alpes Grenoble Cedex 9 France
- Parc Naturel Régional du Haut Jura Lajoux France
| | - Delphine Rioux
- Laboratoire d'Ecologie Alpine UMR CNRS‐UGA‐USMB 5553 Université Grenoble Alpes Grenoble Cedex 9 France
| | - Maya Guéguen
- Laboratoire d'Ecologie Alpine UMR CNRS‐UGA‐USMB 5553 Université Grenoble Alpes Grenoble Cedex 9 France
| | - Julien Renaud
- Laboratoire d'Ecologie Alpine UMR CNRS‐UGA‐USMB 5553 Université Grenoble Alpes Grenoble Cedex 9 France
| | - Laurence Després
- Laboratoire d'Ecologie Alpine UMR CNRS‐UGA‐USMB 5553 Université Grenoble Alpes Grenoble Cedex 9 France
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10
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Pérez-Pereira N, Pouso R, Rus A, Vilas A, López-Cortegano E, García-Dorado A, Quesada H, Caballero A. Long-term exhaustion of the inbreeding load in Drosophila melanogaster. Heredity (Edinb) 2021; 127:373-383. [PMID: 34400819 PMCID: PMC8478893 DOI: 10.1038/s41437-021-00464-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 07/29/2021] [Accepted: 07/29/2021] [Indexed: 02/07/2023] Open
Abstract
Inbreeding depression, the decline in fitness of inbred individuals, is a ubiquitous phenomenon of great relevance in evolutionary biology and in the fields of animal and plant breeding and conservation. Inbreeding depression is due to the expression of recessive deleterious alleles that are concealed in heterozygous state in noninbred individuals, the so-called inbreeding load. Genetic purging reduces inbreeding depression by removing these alleles when expressed in homozygosis due to inbreeding. It is generally thought that fast inbreeding (such as that generated by full-sib mating lines) removes only highly deleterious recessive alleles, while slow inbreeding can also remove mildly deleterious ones. However, a question remains regarding which proportion of the inbreeding load can be removed by purging under slow inbreeding in moderately large populations. We report results of two long-term slow inbreeding Drosophila experiments (125-234 generations), each using a large population and a number of derived lines with effective sizes about 1000 and 50, respectively. The inbreeding load was virtually exhausted after more than one hundred generations in large populations and between a few tens and over one hundred generations in the lines. This result is not expected from genetic drift alone, and is in agreement with the theoretical purging predictions. Computer simulations suggest that these results are consistent with a model of relatively few deleterious mutations of large homozygous effects and partially recessive gene action.
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Affiliation(s)
- Noelia Pérez-Pereira
- grid.6312.60000 0001 2097 6738Centro de Investigación Mariña, Universidade de Vigo, Facultade de Bioloxía, Vigo, Spain
| | - Ramón Pouso
- grid.6312.60000 0001 2097 6738Centro de Investigación Mariña, Universidade de Vigo, Facultade de Bioloxía, Vigo, Spain
| | - Ana Rus
- grid.6312.60000 0001 2097 6738Centro de Investigación Mariña, Universidade de Vigo, Facultade de Bioloxía, Vigo, Spain
| | - Ana Vilas
- grid.6312.60000 0001 2097 6738Centro de Investigación Mariña, Universidade de Vigo, Facultade de Bioloxía, Vigo, Spain
| | - Eugenio López-Cortegano
- grid.6312.60000 0001 2097 6738Centro de Investigación Mariña, Universidade de Vigo, Facultade de Bioloxía, Vigo, Spain ,grid.4305.20000 0004 1936 7988Present Address: Institute of Evolutionary Biology, School of Biological Sciences, University of Edinburgh, Edinburgh, United Kingdom
| | - Aurora García-Dorado
- grid.4795.f0000 0001 2157 7667Facultad de Ciencias Biológicas, Departamento de Genética, Universidad Complutense, Madrid, Spain
| | - Humberto Quesada
- grid.6312.60000 0001 2097 6738Centro de Investigación Mariña, Universidade de Vigo, Facultade de Bioloxía, Vigo, Spain
| | - Armando Caballero
- grid.6312.60000 0001 2097 6738Centro de Investigación Mariña, Universidade de Vigo, Facultade de Bioloxía, Vigo, Spain
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11
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Zhou P, He XZ, Chen C, Wang Q. Reproductive Strategies That May Facilitate Invasion Success: Evidence From a Spider Mite. JOURNAL OF ECONOMIC ENTOMOLOGY 2021; 114:632-637. [PMID: 33438024 DOI: 10.1093/jee/toaa313] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Indexed: 06/12/2023]
Abstract
With significant surge of international trade in recent decades, increasingly more arthropod species have become established outside their natural range of distribution, causing enormous damage in their novel habitats. However, whether a species can colonize its new environment depends on its ability to overcome various barriers which may result in establishment failure, such as inbreeding depression and difficulty to find mates. Here, we used a haplodiploid pest, Tetranychus ludeni Zacher (Acari: Tetranychidae), which is native to Europe but now cosmopolitan, to investigate whether its reproductive strategies have facilitated its invasion success, providing knowledge to develop programs for prediction and management of biological invasions. We show that inbreeding had no negative influence on female reproductive outputs and longevity over 11 successive generations, allowing mother-son and brother-sister mating to occur at the invasion front without adverse consequences in fitness. Virgin females produced maximum number of sons in their early life to ensure subsequent mother-son mating but later saved resources to prolong longevity for potential future mating. Females maximized their resource allocation to egg production immediately after mating to secure production of maximum number of both daughters and sons as early as possible. Furthermore, mated females with mating delay increased proportion of daughters in offspring produced to compensate the loss of production of daughters during their virgin life. We suggest that the lack of inbreeding depression in successive generations and the ability to adjust resource allocations depending whether and when mating occurs may be the key features that have facilitated its invasion success.
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Affiliation(s)
- Peng Zhou
- School of Agriculture and Environment, Massey University, Private Bag, Palmerston North, New Zealand
| | - Xiong Zhao He
- School of Agriculture and Environment, Massey University, Private Bag, Palmerston North, New Zealand
| | - Chen Chen
- School of Agriculture and Environment, Massey University, Private Bag, Palmerston North, New Zealand
| | - Qiao Wang
- School of Agriculture and Environment, Massey University, Private Bag, Palmerston North, New Zealand
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12
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Willemsen D, Cui R, Reichard M, Valenzano DR. Intra-species differences in population size shape life history and genome evolution. eLife 2020; 9:e55794. [PMID: 32869739 PMCID: PMC7462614 DOI: 10.7554/elife.55794] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Accepted: 08/14/2020] [Indexed: 12/16/2022] Open
Abstract
The evolutionary forces shaping life history divergence within species are largely unknown. Turquoise killifish display differences in lifespan among wild populations, representing an ideal natural experiment in evolution and diversification of life history. By combining genome sequencing and population genetics, we investigate the evolutionary forces shaping lifespan among wild turquoise killifish populations. We generate an improved reference genome assembly and identify genes under positive and purifying selection, as well as those evolving neutrally. Short-lived populations from the outer margin of the species range have small population size and accumulate deleterious mutations in genes significantly enriched in the WNT signaling pathway, neurodegeneration, cancer and the mTOR pathway. We propose that limited population size due to habitat fragmentation and repeated population bottlenecks, by increasing the genome-wide mutation load, exacerbates the effects of mutation accumulation and cumulatively contribute to the short adult lifespan.
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Affiliation(s)
| | - Rongfeng Cui
- Max Planck Institute for Biology of AgeingCologneGermany
| | - Martin Reichard
- Czech Academy of Sciences, Institute of Vertebrate BiologyBrnoCzech Republic
- Department of Botany and Zoology, Faculty of Science, Masaryk UniversityBrnoCzech Republic
| | - Dario Riccardo Valenzano
- Max Planck Institute for Biology of AgeingCologneGermany
- CECAD, University of CologneCologneGermany
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Population Genomics of Bettongia lesueur: Admixing Increases Genetic Diversity with no Evidence of Outbreeding Depression. Genes (Basel) 2019; 10:genes10110851. [PMID: 31661830 PMCID: PMC6896034 DOI: 10.3390/genes10110851] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Revised: 10/11/2019] [Accepted: 10/25/2019] [Indexed: 11/27/2022] Open
Abstract
Small and isolated populations are subject to the loss of genetic variation as a consequence of inbreeding and genetic drift, which in turn, can affect the fitness and long-term viability of populations. Translocations can be used as an effective conservation tool to combat this loss of genetic diversity through establishing new populations of threatened species, and to increase total population size. Releasing animals from multiple genetically diverged sources is one method to optimize genetic diversity in translocated populations. However, admixture as a conservation tool is rarely utilized due to the risks of outbreeding depression. Using high-resolution genomic markers through double-digest restriction site-associated sequencing (ddRAD-seq) and life history data collected over nine years of monitoring, this study investigates the genetic and fitness consequences of admixing two genetically-distinct subspecies of Bettongia lesueur in a conservation translocation. Using single nucleotide polymorphisms (SNPs) identified from 215 individuals from multiple generations, we found an almost 2-fold increase in genetic diversity in the admixed translocation population compared to the founder populations, and this was maintained over time. Furthermore, hybrid class did not significantly impact on survivorship or the recruitment rate and therefore we found no indication of outbreeding depression. This study demonstrates the beneficial application of mixing multiple source populations in the conservation of threatened species for minimizing inbreeding and enhancing adaptive potential and overall fitness.
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