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Anderson SAS, López-Fernández H, Weir JT. Ecology and the origin of non-ephemeral species. Am Nat 2022; 201:619-638. [PMID: 37130236 DOI: 10.1086/723763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
AbstractResearch over the past three decades has shown that ecology-based extrinsic reproductive barriers can rapidly arise to generate incipient species-but such barriers can also rapidly dissolve when environments change, resulting in incipient species collapse. Understanding the evolution of unconditional, "intrinsic" reproductive barriers is therefore important for understanding the longer-term buildup of biodiversity. In this article, we consider ecology's role in the evolution of intrinsic reproductive isolation. We suggest that this topic has fallen into a gap between disciplines: while evolutionary ecologists have traditionally focused on the rapid evolution of extrinsic isolation between co-occurring ecotypes, speciation geneticists studying intrinsic isolation in other taxa have devoted little attention to the ecological context in which it evolves. We argue that for evolutionary ecology to close this gap, the field will have to expand its focus beyond rapid adaptation and its traditional model systems. Synthesizing data from several subfields, we present circumstantial evidence for and against different forms of ecological adaptation as promoters of intrinsic isolation and discuss alternative forces that may be significant. We conclude by outlining complementary approaches that can better address the role of ecology in the evolution of nonephemeral reproductive barriers and, by extension, less ephemeral species.
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2
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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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Martincová I, Ďureje Ľ, Kreisinger J, Macholán M, Piálek J. Phenotypic effects of the Y chromosome are variable and structured in hybrids among house mouse recombinant lines. Ecol Evol 2019; 9:6124-6137. [PMID: 31161024 PMCID: PMC6540687 DOI: 10.1002/ece3.5196] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Accepted: 04/03/2019] [Indexed: 12/12/2022] Open
Abstract
Hybrid zones between divergent populations sieve genomes into blocks that introgress across the zone, and blocks that do not, depending on selection between interacting genes. Consistent with Haldane's rule, the Y chromosome has been considered counterselected and hence not to introgress across the European house mouse hybrid zone. However, recent studies detected massive invasion of M. m. musculus Y chromosomes into M. m. domesticus territory. To understand mechanisms facilitating Y spread, we created 31 recombinant lines from eight wild-derived strains representing four localities within the two mouse subspecies. These lines were reciprocally crossed and resulting F1 hybrid males scored for five phenotypic traits associated with male fitness. Molecular analyses of 51 Y-linked SNPs attributed ~50% of genetic variation to differences between the subspecies and 8% to differentiation within both taxa. A striking proportion, 21% (frequencies of sperm head abnormalities) and 42% (frequencies of sperm tail dissociations), of phenotypic variation was explained by geographic Y chromosome variants. Our crossing design allowed this explanatory power to be examined across a hierarchical scale from subspecific to local intrastrain effects. We found that divergence and variation were expressed diversely in different phenotypic traits and varied across the whole hierarchical scale. This finding adds another dimension of complexity to studies of Y introgression not only across the house mouse hybrid zone but potentially also in other contact zones.
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Affiliation(s)
- Iva Martincová
- Research Facility Studenec, Institute of Vertebrate BiologyCzech Academy of SciencesBrnoCzech Republic
- Department of Botany and Zoology, Faculty of ScienceMasaryk UniversityBrnoCzech Republic
| | - Ľudovít Ďureje
- Research Facility Studenec, Institute of Vertebrate BiologyCzech Academy of SciencesBrnoCzech Republic
| | - Jakub Kreisinger
- Department of Zoology, Faculty of ScienceCharles University in PraguePragueCzech Republic
| | - Miloš Macholán
- Laboratory of Mammalian Evolutionary Genetics, Institute of Animal Physiology and GeneticsCzech Academy of SciencesBrnoCzech Republic
| | - Jaroslav Piálek
- Research Facility Studenec, Institute of Vertebrate BiologyCzech Academy of SciencesBrnoCzech Republic
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Rey C, Noguerales V, García-Navas V. Ecological and phenotypic divergence in Iberian shrews (Soricidae). J ZOOL SYST EVOL RES 2019. [DOI: 10.1111/jzs.12270] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Claudia Rey
- Máster Universitario en Biodiversidad y Biología de la Conservación; Universidad Pablo de Olavide; Seville Spain
| | - Víctor Noguerales
- Grupo de Biodiversidad Genética y Cultural; Instituto de Investigación en Recursos Cinegéticos (IREC CSIC-UCLM-JCCM); Ciudad Real Spain
- Department of Biological Sciences; University of Cyprus; Nicosia Cyprus
| | - Vicente García-Navas
- Department of Integrative Ecology; Estación Biológica de Doñana (EBD CSIC); Seville Spain
- Laboratoire d'Ecologie Alpine (LECA); Université Grenoble Alpes; Grenoble France
- Department of Evolutionary Biology and Environmental Studies; University of Zurich; Zürich Switzerland
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5
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Bannikova AA, Chernetskaya D, Raspopova A, Alexandrov D, Fang Y, Dokuchaev N, Sheftel B, Lebedev V. Evolutionary history of the genusSorex(Soricidae, Eulipotyphla) as inferred from multigene data. ZOOL SCR 2018. [DOI: 10.1111/zsc.12302] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | - Dmitry Alexandrov
- Severtsov Institute of Ecology and Evolution; Russian Academy of Sciences; Moscow Russia
| | - Yun Fang
- Institute of Zoology; Chinese Academy of Science; Beijing China
| | - Nikolai Dokuchaev
- Institute of Biological Problems of the North FEB; Russian Academy of Sciences; Magadan Russia
| | - Boris Sheftel
- Severtsov Institute of Ecology and Evolution; Russian Academy of Sciences; Moscow Russia
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6
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Yannic G, Statham MJ, Denoyelle L, Szor G, Qulaut GQ, Sacks BN, Lecomte N. Investigating the ancestry of putative hybrids: are Arctic fox and red fox hybridizing? Polar Biol 2017. [DOI: 10.1007/s00300-017-2126-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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7
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Mackiewicz P, Moska M, Wierzbicki H, Gagat P, Mackiewicz D. Evolutionary history and phylogeographic relationships of shrews from Sorex araneus group. PLoS One 2017; 12:e0179760. [PMID: 28650986 PMCID: PMC5484494 DOI: 10.1371/journal.pone.0179760] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Accepted: 06/02/2017] [Indexed: 11/23/2022] Open
Abstract
Shrews of the Sorex genus are an evolutionarily successful group that includes more than 77 species widely distributed in Eurasia and North America. The genus is one of the rare cases where karyotypic changes reflect well the evolutionary relationships among its species. The taxa showing the greatest variation in karyotype are usually classified into the Sorex araneus group. Its evolution was associated with chromosomal rearrangements, which could have promoted fast diversification of this group into many chromosomal races and species. These processes were additionally complicated by introgressions of mitochondrial DNA, which made the evolutionary history of this group quite complex and difficult to infer. To tackle the problem, we performed multi-method phylogenetic analyses based on mitochondrial cytochrome b that is considered a good molecular marker available for many representatives of Sorex. The results were compared with phylogenies based on chromosomal rearrangement data and put into temporal and spatial context using molecular dating and historical biogeography methods. We complemented the study with the estimation of diversification rates within the S. araneus group as well as comparing the results with paleontological records and climatic oscillations within the last 4 million years. Based on the gathered data, we proposed a hypothetical scenario for the evolution and geographic dispersion of species belonging to the S. araneus group. The shrews began to diversify about 2.7 million years ago in Eurasia and then migrated at least twice to North America. The evolution of shrews was driven by Pleistocene glacial and interglacial cycles, which increased their speciation rate and the emergence of new lineages. The migrations of populations were accompanied by introgressions of mitochondrial DNA into native shrews and occurred at least twice.
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Affiliation(s)
- Paweł Mackiewicz
- Department of Genomics, Faculty of Biotechnology, University of Wrocław, Wrocław, Poland
| | - Magdalena Moska
- Department of Genetics, Wroclaw University of Environmental and Life Sciences, Wroclaw, Poland
| | - Heliodor Wierzbicki
- Department of Genetics, Wroclaw University of Environmental and Life Sciences, Wroclaw, Poland
| | - Przemysław Gagat
- Department of Genomics, Faculty of Biotechnology, University of Wrocław, Wrocław, Poland
| | - Dorota Mackiewicz
- Department of Genomics, Faculty of Biotechnology, University of Wrocław, Wrocław, Poland
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8
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McEntee JP, Peñalba JV, Werema C, Mulungu E, Mbilinyi M, Moyer D, Hansen L, Fjeldså J, Bowie RCK. Social selection parapatry in Afrotropical sunbirds. Evolution 2016; 70:1307-21. [PMID: 27167078 DOI: 10.1111/evo.12950] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 04/18/2016] [Accepted: 04/30/2016] [Indexed: 01/01/2023]
Abstract
The extent of range overlap of incipient and recent species depends on the type and magnitude of phenotypic divergence that separates them, and the consequences of phenotypic divergence on their interactions. Signal divergence by social selection likely initiates many speciation events, but may yield niche-conserved lineages predisposed to limit each others' ranges via ecological competition. Here, we examine this neglected aspect of social selection speciation theory in relation to the discovery of a nonecotonal species border between sunbirds. We find that Nectarinia moreaui and Nectarinia fuelleborni meet in a ∼6 km wide contact zone, as estimated by molecular cline analysis. These species exploit similar bioclimatic niches, but sing highly divergent learned songs, consistent with divergence by social selection. Cline analyses suggest that within-species stabilizing social selection on song-learning predispositions maintains species differences in song despite both hybridization and cultural transmission. We conclude that ecological competition between moreaui and fuelleborni contributes to the stabilization of the species border, but that ecological competition acts in conjunction with reproductive interference. The evolutionary maintenance of learned song differences in a hybrid zone recommend this study system for future studies on the mechanisms of learned song divergence and its role in speciation.
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Affiliation(s)
- Jay P McEntee
- Museum of Vertebrate Zoology and Department of Integrative Biology, University of California, Berkeley, California, 94720. .,Current Address: Department of Biology, University of Florida, P. O. Box 118525, 220 Bartram Hall, Gainesville, Florida, 32611.
| | - Joshua V Peñalba
- Museum of Vertebrate Zoology and Department of Integrative Biology, University of California, Berkeley, California, 94720.,Current Address: Australian National University, Canberra
| | - Chacha Werema
- Department of Zoology and Wildlife Conservation, University of Dar-es-salaam, Dar-es-salaam, Tanzania
| | | | | | - David Moyer
- Field Museum of Natural History, Chicago, Illinois, 60605
| | - Louis Hansen
- Center for Macroecology, Evolution and Climate, University of Copenhagen, Denmark
| | - Jon Fjeldså
- Center for Macroecology, Evolution and Climate, University of Copenhagen, Denmark
| | - Rauri C K Bowie
- Museum of Vertebrate Zoology and Department of Integrative Biology, University of California, Berkeley, California, 94720
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Johnson BB, White TA, Phillips CA, Zamudio KR. Asymmetric Introgression in a Spotted Salamander Hybrid Zone. J Hered 2015; 106:608-17. [DOI: 10.1093/jhered/esv042] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Accepted: 06/02/2015] [Indexed: 11/15/2022] Open
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10
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Chen S, Sun Z, He K, Jiang X, Liu Y, Koju NP, Zhang X, Tu F, Fan Z, Liu S, Yue B. Molecular phylogenetics and phylogeographic structure of Sorex bedfordiae based on mitochondrial and nuclear DNA sequences. Mol Phylogenet Evol 2015; 84:245-53. [PMID: 25617490 DOI: 10.1016/j.ympev.2014.12.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2014] [Revised: 12/01/2014] [Accepted: 12/04/2014] [Indexed: 10/24/2022]
Abstract
The southeastern margin of the Tibetan Plateau is characterized by complex topography and a discontinuous landscape, creating a sky island situation. However, the way topography shapes genetic structures and demographic histories of endemic species has not been well studied. We examined the phylogeographic pattern and demographic histories of Sorex bedfordiae, a dispersal-limited small mammal, using three nuclear genes [1977bp] and two mitochondrial genes [1794bp] with comprehensive molecular approaches. We recovered five well-supported clades whose distributions are along mountain ridges and roughly subdivided by large rivers. Demographic expansions in the middle Pleistocene were strongly supported by both nuclear and mitochondrial genes. Our results support the hypothesis that sky island topography and river systems strongly affect the genetic structure of non-aquatic terrestrial species. We further clarify that S. bedfordiae and S. cylindricauda are valid sibling species, whereas S. excelsus is most likely a geographic subspecies of S. bedfordiae.
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Affiliation(s)
- Shunde Chen
- Key Laboratory of Bio-Resources and Eco-Environment, Ministry of Education, Sichuan University, Chengdu 610064, China; College of Life Sciences, Sichuan Normal University, Chengdu 610066, China; Mammal Ecology and Evolution Research Group, State Key Laboratory of Genetic Resources and Evolution Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China
| | - Zhiyu Sun
- Sichuan Academy of Forestry, Chengdu 610081, China
| | - Kai He
- Mammal Ecology and Evolution Research Group, State Key Laboratory of Genetic Resources and Evolution Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China
| | - Xuelong Jiang
- Mammal Ecology and Evolution Research Group, State Key Laboratory of Genetic Resources and Evolution Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China
| | - Yang Liu
- Sichuan Academy of Forestry, Chengdu 610081, China
| | - Narayan Prasad Koju
- Mammal Ecology and Evolution Research Group, State Key Laboratory of Genetic Resources and Evolution Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China
| | - Xiuyue Zhang
- Key Laboratory of Bio-Resources and Eco-Environment, Ministry of Education, Sichuan University, Chengdu 610064, China
| | - Feiyun Tu
- Key Laboratory of Bio-Resources and Eco-Environment, Ministry of Education, Sichuan University, Chengdu 610064, China
| | - Zhenxing Fan
- Key Laboratory of Bio-Resources and Eco-Environment, Ministry of Education, Sichuan University, Chengdu 610064, China
| | - Shaoying Liu
- Sichuan Academy of Forestry, Chengdu 610081, China.
| | - Bisong Yue
- Key Laboratory of Bio-Resources and Eco-Environment, Ministry of Education, Sichuan University, Chengdu 610064, China.
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11
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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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12
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Nouvellet P, Gourbière S. Biased sex-ratio and sex-biased heterozygote disadvantage affect the maintenance of a genetic polymorphism and the properties of hybrid zones. J Evol Biol 2013; 26:1774-83. [PMID: 23837902 DOI: 10.1111/jeb.12180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Revised: 02/22/2013] [Accepted: 03/28/2013] [Indexed: 12/01/2022]
Abstract
The evolution of biodiversity is a major issue of modern biology, and it is becoming increasingly topical as the ongoing erosion of diversity puts serious threats on human well-being. An elementary mechanism that allows maintaining diversity is the interplay between dispersal and heterozygote selective disadvantage, which can lead to self-sustainable spatial genetic structures and is central to the stability of hybrid zones. Theoretical studies supporting the importance of this mechanism assume a balanced sex-ratio and a heterozygote disadvantage equally affecting both sexes, despite the multiplicity of empirical evidence that (i) adult sex-ratio is usually biased towards either male or female and that (ii) heterozygote disadvantage often affects a single sex. We expanded the existing theory by weighting the strength of selection against heterozygote according to the biased in sex-ratio and in heterozygote disadvantage. The range of conditions allowing for the maintenance of polymorphism can then either double or vanish. We discuss the implications of such finding for birds, mammals and insects diversity. Finally, we provide simple analytical predictions about the effect of those biased on the width and speed of hybrid zones and on the time for the spread of beneficial mutations through such zones.
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Affiliation(s)
- P Nouvellet
- MRC Centre for Outbreak Analysis and Modelling, Department of Infectious Disease Epidemiology, Faculty of Medicine, School of Public Health, Imperial College, London, UK
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13
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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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14
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Wang RX. Gene flow across a hybrid zone maintained by a weak heterogametic incompatibility and positive selection of incompatible alleles. J Evol Biol 2012; 26:386-98. [PMID: 23279645 DOI: 10.1111/jeb.12057] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2012] [Revised: 10/18/2012] [Accepted: 10/24/2012] [Indexed: 11/27/2022]
Abstract
Hybridization between incipient species is more likely to produce sterile or inviable F(1) offspring in the heterogametic (XY or ZW) sex than in the homogametic (XX or ZZ) sex, a phenomenon known as Haldane's rule. Population dynamics associated with Haldane's rule may play an important role in early speciation of sexually reproducing organisms. The dynamics of the hybrid zone maintained by incomplete hybrid inferiority (sterility/inviability) in the heterogametic sex (a 'weak' Haldane's rule) caused by a Bateson-Dobzhansky-Muller incompatibility was modelled. The influences and interplays of the strengths of incompatibility, dispersal, density-dependent regulation (DDR) and local adaptation of incompatible alleles in a scenario of short-range dispersal (the stepping-stone model) were examined. It was found that a partial heterogametic hybrid incompatibility could efficiently impede gene flow and maintain characteristic clinal noncoincidence and discordance of alleles. Density-dependent regulation appears to be an important factor affecting hybrid zone dynamics: it can effectively skew the effects of the partial incompatibility and dispersal as measured by effective dispersal, clinal structures and density depression. Unexpectedly, local adaptation of incompatible alleles in the parental populations, which would be critical for the establishment of the incompatibility, exerts little effect on hybrid zone dynamics. These results strongly support the plausibility of the adaptive origin of hybrid incompatibility and ecological speciation: an adaptive mutation, if it confers a marginal fitness advantage in the local population and happens to cause epistatic inferiority in hybrids, could efficiently drive further genetic divergence that may result in the gene becoming an evolutionary hotspot.
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Affiliation(s)
- R-X Wang
- BC Cancer Agency, Vancouver, BC, Canada.
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15
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VEDENINA VARVARA. Variation in complex courtship traits across a hybrid zone between grasshopper species of the Chorthippus albomarginatus group. Biol J Linn Soc Lond 2011. [DOI: 10.1111/j.1095-8312.2010.01566.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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16
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Additional data for nuclear DNA give new insights into the phylogenetic position of Sorex granarius within the Sorex araneus group. Mol Phylogenet Evol 2010; 57:1062-71. [DOI: 10.1016/j.ympev.2010.09.015] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2010] [Revised: 06/12/2010] [Accepted: 09/16/2010] [Indexed: 11/19/2022]
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17
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Yannic G, Basset P, Hausser J. Chromosomal rearrangements and gene flow over time in an inter-specific hybrid zone of the Sorex araneus group. Heredity (Edinb) 2009; 102:616-25. [PMID: 19240751 DOI: 10.1038/hdy.2009.19] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Most hybrid zones have existed for hundreds or thousands of years but have generally been observed for only a short time period. Studies extending over periods long enough to track evolutionary changes in the zones or assess the ultimate outcome of hybridization are scarce. Here, we describe the evolution over time of the level of genetic isolation between two karyotypically different species of shrews (Sorex araneus and Sorex antinorii) at a hybrid zone located in the Swiss Alps. We first evaluated hybrid zone movement by contrasting patterns of gene flow and changes in cline parameters (centre and width) using 24 microsatellite loci, between two periods separated by 10 years apart. Additionally, we tested the role of chromosomal rearrangements on gene flow by analysing microsatellite loci located on both rearranged and common chromosomes to both species. We did not detect any movement of the hybrid zone during the period analysed, suggesting that the zone is a typical tension zone. However, the gene flow was significantly lower among the rearranged than the common chromosomes for the second period, whereas the difference was only marginally significant for the first period. This further supports the role of chromosomal rearrangements on gene flow between these taxa.
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Affiliation(s)
- G Yannic
- Department of Ecology and Evolution, University of Lausanne, Lausanne, Switzerland.
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18
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Geraldes A, Carneiro M, Delibes-Mateos M, Villafuerte R, Nachman MW, Ferrand N. Reduced introgression of the Y chromosome between subspecies of the European rabbit (Oryctolagus cuniculus) in the Iberian Peninsula. Mol Ecol 2008; 17:4489-99. [PMID: 18986495 DOI: 10.1111/j.1365-294x.2008.03943.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The role of the Y chromosome in speciation is unclear. Hybrid zones provide natural arenas for studying speciation, as differential introgression of markers may reveal selection acting against incompatibilities. Two subspecies of the European rabbit (Oryctolagus cuniculus) form a hybrid zone in the Iberian Peninsula. Previous work on mitochondrial DNA (mtDNA), Y- and X-linked loci revealed the existence of two divergent lineages in the rabbit genome and that these lineages are largely subspecies-specific for mtDNA and two X-linked loci. Here we investigated the geographic distribution of the two Y chromosome lineages by genotyping two diagnostic single nucleotide polymorphisms in a sample of 353 male rabbits representing both subspecies, and found that Y chromosome lineages are also largely subspecies-specific. We then sequenced three autosomal loci and discovered considerable variation in levels of differentiation at these loci. Finally, we compared estimates of population differentiation between rabbit subspecies at 26 markers and found a surprising bimodal distribution of F(ST)values. The vast majority of loci showed little or no differentiation between rabbit subspecies while a few loci, including the SRY gene, showed little or no introgression across the hybrid zone. Estimates of population differentiation for the Y chromosome were surprisingly high given that there is male-biased dispersal in rabbits. Taken together, these data indicate that there is a clear dichotomy in the rabbit genome and that some loci remain highly differentiated despite extensive gene flow following secondary contact.
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Affiliation(s)
- A Geraldes
- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Universidade do Porto, Campus Agrário de Vairão, 4485-661 Vairão, Portugal.
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19
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YANNIC G, BASSET P, HAUSSER J. Phylogeography and recolonization of the Swiss Alps by the Valais shrew (Sorex antinorii), inferred with autosomal and sex-specific markers. Mol Ecol 2008; 17:4118-33. [DOI: 10.1111/j.1365-294x.2008.03888.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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