Molecular Ecology最新文献_第2页

Dispersal, Isolation and Local Adaptation Promote Speciation in South American Savannas as Indicated by a Phylogenomic Analysis of a Passerine. 一种雀形目动物的系统基因组分析表明，散布、隔离和局部适应促进了南美洲稀树草原的物种形成。

IF 4.5 1区生物学

Molecular Ecology Pub Date : 2025-06-10 DOI: 10.1111/mec.17827

Alejandro Manuel Ferreiro, Renato Caparroz, Alexandre Aleixo, Luís Fábio Silveira, Samira Rezende Duarte, Cássia Alves Lima-Rezende, Martín Carboni, Gustavo Sebastián Cabanne

引用次数: 0

Genome Analyses Reveal Diverse Riverine Genetic Contributions to the Lake Malawi Cichlid Radiation. 基因组分析揭示了马拉维湖慈鲷辐射的不同河流遗传贡献。

IF 4.5 1区生物学

Molecular Ecology Pub Date : 2025-06-10 DOI: 10.1111/mec.17786

Sophie Gresham, Bosco Rusuwa, Maxon Ngochera, George F Turner, Martin J Genner, Milan Malinsky, Hannes Svardal

{"title":"Genome Analyses Reveal Diverse Riverine Genetic Contributions to the Lake Malawi Cichlid Radiation.","authors":"Sophie Gresham, Bosco Rusuwa, Maxon Ngochera, George F Turner, Martin J Genner, Milan Malinsky, Hannes Svardal","doi":"10.1111/mec.17786","DOIUrl":"https://doi.org/10.1111/mec.17786","url":null,"abstract":"Comparative studies of whole genomes have increasingly shown that genetic introgression between closely related species is surprisingly common across the tree of life, making the description of biodiversity and understanding the process of speciation complex and challenging. The adaptive radiation of cichlid fishes in Lake Malawi, that is characterised by hybrid origins and cases of recent introgression, provides a valuable model system to study the evolutionary implications of introgression. However, many potential sources of introgression into the radiation have not yet been investigated. Here we use whole genome data from 239 species from Lake Malawi and 76 species from surrounding African river and lake systems to identify previously unknown introgression events involving the Malawi radiation. Computing genome-wide excess allele sharing (ABBA-BABA statistics) and window-based statistics, we find that three independent riverine cichlid lineages show significantly higher allele sharing with the Malawi radiation than expected, suggesting historical genetic exchange. Introgressed haplotypes are distributed relatively uniformly across the Malawi radiation, indicating that most hybrid-derived polymorphism was acquired and sorted before the formation of the contemporary Malawi radiation. Our results point towards several previously unknown contributors to the Malawi cichlid hybrid swarm and show that the history of one of the largest vertebrate radiations is more complex than previously thought.","PeriodicalId":210,"journal":{"name":"Molecular Ecology","volume":" ","pages":"e17786"},"PeriodicalIF":4.5,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144264954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Contrasting Evolutionary Trajectories Under Paternal Genome Elimination in Male and Female Citrus Mealybugs. 雄性和雌性柑橘粉蚧在父系基因组消除条件下的进化轨迹对比。

IF 4.5 1区生物学

Molecular Ecology Pub Date : 2025-06-09 DOI: 10.1111/mec.17826

Andrew J Mongue, Tamsin E Woodman, Hollie Marshall, Arkadiy Garber, José C Franco, John P McCutcheon, Laura Ross

{"title":"Contrasting Evolutionary Trajectories Under Paternal Genome Elimination in Male and Female Citrus Mealybugs.","authors":"Andrew J Mongue, Tamsin E Woodman, Hollie Marshall, Arkadiy Garber, José C Franco, John P McCutcheon, Laura Ross","doi":"10.1111/mec.17826","DOIUrl":"https://doi.org/10.1111/mec.17826","url":null,"abstract":"Most studies of sex-biased genes explore their evolution in familiar chromosomal sex determination systems, leaving the evolution of sex differences under alternative reproductive systems unknown. Here we explore the system of paternal genome elimination employed by mealybugs (Hemiptera: Pseudococcidae) which have no sex chromosomes. Instead, all chromosomes are autosomal and inherited in two copies, but sex is determined by the ploidy of expression. Females express both parental alleles, but males reliably silence their paternally inherited chromosomes, creating genome-wide haploid expression in males and diploid expression in females. Additionally, sons do not express alleles directly inherited from their fathers, potentially disrupting the evolution of male-benefiting traits. To understand how these dynamics impact molecular evolution, we generated sex-specific RNAseq, a new gene annotation, and whole-genome population sequencing of the citrus mealybug, Planococcus citri. We found that genes expressed primarily in females hold more variation and evolve more quickly than those expressed in males or both sexes. Conversely, we found more apparent adaptation in genes expressed mainly in males than in those expressed in females. Put together, in this paternal genome elimination system there is slower change on the male side but, by increasing selective scrutiny, an increase in the degree of adaptation in these genes. These results expand our understanding of evolution in a non-Mendelian genetic system and the data we generated should prove useful for future research on this pest insect.","PeriodicalId":210,"journal":{"name":"Molecular Ecology","volume":" ","pages":"e17826"},"PeriodicalIF":4.5,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144245453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bumblebee Pollination and Herbivory Alter Genomic Adaptation of Plants to Soil. 大黄蜂授粉和草食改变植物对土壤的基因组适应。

IF 4.5 1区生物学

Molecular Ecology Pub Date : 2025-06-09 DOI: 10.1111/mec.17811

Tyler Figueira, Léa Frachon, Florian P Schiestl

{"title":"Bumblebee Pollination and Herbivory Alter Genomic Adaptation of Plants to Soil.","authors":"Tyler Figueira, Léa Frachon, Florian P Schiestl","doi":"10.1111/mec.17811","DOIUrl":"https://doi.org/10.1111/mec.17811","url":null,"abstract":"Adaptation to environmental heterogeneity is a key driver of between-population genomic differentiation, yet we know very little about how genomic divergence is affected by adaptation to multiple ecological factors. Using an experimental evolution approach, we whole-genome re-sequenced 'fast-cycling' Brassica rapa plants which had evolved during eight generations of selection from different combinations of soil type, aphid herbivore presence or absence, and either bee- or hand pollination. Our results show that bumblebee pollination was the strongest driver of genomic divergence and that the degree of genomic divergence was strongly associated with the number of SNP markers identified in genomic selection scans. Furthermore, we found that the number of SNPs under selection was affected by herbivory in a soil-dependent way. More specifically, aphid herbivory was associated with an increased number of selected SNPs for bee-pollinated plants that evolved in tuff soil but was associated with a decreased number of selected SNPs for bee-pollinated plants that evolved in the more resource-limiting limestone soil. We also found that a higher number of selected SNPs was associated with higher rates of phenotypic evolution for 27 phenotypic traits including morphology and scent. Finally, we found that variation in pleiotropy between treatments was related to both the degree of genomic divergence and the number of SNPs under selection. Our results demonstrate that different soil types promote unique adaptive genomic architectures in response to biotic interactions, thus increasing genomic divergence between plant populations.","PeriodicalId":210,"journal":{"name":"Molecular Ecology","volume":" ","pages":"e17811"},"PeriodicalIF":4.5,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144245452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Introgression, Phylogeography, and Genomic Species Cohesion in the Eastern North American White Oak Syngameon. 北美东部白栎树群落的遗传渗入、系统地理学和基因组物种内聚。

IF 4.5 1区生物学

Molecular Ecology Pub Date : 2025-06-09 DOI: 10.1111/mec.17822

Gabe Ribicoff, Mira Garner, Kasey Pham, Kieran N Althaus, Jeannine Cavender-Bares, Andrew A Crowl, Samantha Gray, Paul Gugger, Marlene Hahn, Shuai Liao, Paul S Manos, Rebekah A Mohn, Ian S Pearse, Nicholas R Steichmann, Ashley L Tuffin, Alan T Whittemore, Andrew L Hipp

{"title":"Introgression, Phylogeography, and Genomic Species Cohesion in the Eastern North American White Oak Syngameon.","authors":"Gabe Ribicoff, Mira Garner, Kasey Pham, Kieran N Althaus, Jeannine Cavender-Bares, Andrew A Crowl, Samantha Gray, Paul Gugger, Marlene Hahn, Shuai Liao, Paul S Manos, Rebekah A Mohn, Ian S Pearse, Nicholas R Steichmann, Ashley L Tuffin, Alan T Whittemore, Andrew L Hipp","doi":"10.1111/mec.17822","DOIUrl":"https://doi.org/10.1111/mec.17822","url":null,"abstract":"Hybridization and interspecific gene flow play a substantial role in the evolution of plant taxa. The eastern North American white oak syngameon, a group of approximately 15 ecologically, morphologically and genomically distinguishable species, has long been recognised as a model system for studying introgressive hybridization in temperate trees. However, the prevalence, genomic context and environmental correlates of introgression in this system remain largely unknown. To assess introgression in the eastern North American white oak syngameon and population structure within the widespread Quercus macrocarpa, we conducted a rangewide survey of Q. macrocarpa and four sympatric eastern North American white oak species. Using a Hyb-Seq approach, we assembled a dataset of 3412 thinned single-nucleotide polymorphisms (SNPs) in 445 enriched target loci including 62 genes putatively associated with various ecological functions, as well as associated intronic regions and some off-target intergenic regions (not associated with the exons). Admixture analysis and hybrid class inference demonstrated species coherence despite hybridization and introgressive gene flow (due to backcrossing of F1s to one or both parents). Additionally, we recovered a genetic structure within Q. macrocarpa associated with latitude. Generalised linear mixed models (GLMMs) indicate that proximity to range edge predicts interspecific admixture, but rates of genetic differentiation do not appear to vary between putative functional gene classes. Our study suggests that gene flow between eastern North American white oak species may not be as rampant as previously assumed and that hybridization is most strongly predicted by proximity to a species' range margin.","PeriodicalId":210,"journal":{"name":"Molecular Ecology","volume":" ","pages":"e17822"},"PeriodicalIF":4.5,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144256983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Estimating Recent and Historical Effective Population Size of Marine and Freshwater Sticklebacks. 估算海洋和淡水棘鱼最近和历史的有效种群规模。

IF 4.5 1区生物学

Molecular Ecology Pub Date : 2025-06-08 DOI: 10.1111/mec.17825

Xueyun Feng, Ari Löytynoja, Juha Merilä

{"title":"Estimating Recent and Historical Effective Population Size of Marine and Freshwater Sticklebacks.","authors":"Xueyun Feng, Ari Löytynoja, Juha Merilä","doi":"10.1111/mec.17825","DOIUrl":"https://doi.org/10.1111/mec.17825","url":null,"abstract":"Effective population size (Ne) is a quantity of central importance in evolutionary biology and population genetics, but often notoriously challenging to estimate. Analyses of Ne are further complicated by the many interpretations of the concept and the alternative approaches to quantify Ne utilising different properties of the data. Each method is also informative over different time scales, suggesting that a combination of approaches should allow piecing together the entire continuum of Ne, spanning from the recent to more distant past. To test this in practice, we inferred the Ne continuum for 45 populations of nine-spined sticklebacks (Pungitius pungitius) using whole-genome data with both LD- and coalescent-based methods. Our results show that marine populations exhibit the highest Ne values in contemporary, recent, and historical times, followed by coastal and freshwater populations. The results also demonstrate the impact of both recent and historical gene flow on Ne estimates and show that simple summary statistics are informative in comprehending the events in the very recent past and aid in more accurate estimation of <math> <semantics> <mrow><msubsup><mi>N</mi> <mi>e</mi> <mi>C</mi></msubsup> </mrow> <annotation>$$ {N}_e^C $$</annotation></semantics> </math> , the contemporary Ne, as well as in reconstruction and interpretation of recent demographic histories. Although our sample size for each large population is limited, we found that GONE can provide reasonable Ne estimates. However, due to challenges in detecting subtle genetic drift in large populations, these estimates may represent the lower bound of Ne. Finally, we show that combining GONE and CurrentNe2, both sensitive to population structure, with MSMC2 provides a meaningful interpretation of Ne dynamics over time.","PeriodicalId":210,"journal":{"name":"Molecular Ecology","volume":" ","pages":"e17825"},"PeriodicalIF":4.5,"publicationDate":"2025-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144245454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Genomic Signature of Demographic Decline in a Long-Distance Migrant in a Range-Extreme Population. 极端范围种群中长距离迁徙人口数量下降的基因组特征。

IF 4.5 1区生物学

Molecular Ecology Pub Date : 2025-06-05 DOI: 10.1111/mec.17805

George Day, Thomas Bolderstone, Greg J Conway, Tony Cross, Tony Davis, Matilda Dolan, Mervyn Greening, Colin Neale, Ian Nicholson, Kim Nicholson, Ann Ward, Nik Ward, Graeme Fox, Ewan Harney, Helen Hipperson, Kathryn Maher, Jamie Thompson, Rachel Tucker, Dean Waters, Kate L Durrant, Terry Burke, Jon Slate, Kathryn E Arnold

{"title":"The Genomic Signature of Demographic Decline in a Long-Distance Migrant in a Range-Extreme Population.","authors":"George Day, Thomas Bolderstone, Greg J Conway, Tony Cross, Tony Davis, Matilda Dolan, Mervyn Greening, Colin Neale, Ian Nicholson, Kim Nicholson, Ann Ward, Nik Ward, Graeme Fox, Ewan Harney, Helen Hipperson, Kathryn Maher, Jamie Thompson, Rachel Tucker, Dean Waters, Kate L Durrant, Terry Burke, Jon Slate, Kathryn E Arnold","doi":"10.1111/mec.17805","DOIUrl":"https://doi.org/10.1111/mec.17805","url":null,"abstract":"Migratory birds are inherently vagile, a strategy that may reduce the impacts of habitat loss and fragmentation on genetic diversity. However, specialist resource requirements and range-edge distribution can counteract these benefits. The European nightjar (Caprimulgus europaeus) is a long-distance migratory bird and resource specialist. Like other long-distance migrants, nightjar populations have declined across the British Isles and Northwestern Europe over the past century. With this decline well documented in the British Isles, there is a need to quantify its genetic impacts. We applied full genome resequencing to 60 historic (1841-1980) and 36 contemporary British nightjars. Nightjars exhibited a statistically significant 34.8% loss in heterozygosity and an increase in inbreeding over the last ~180 years, showing a departure from panmixia towards weak spatial structure in the modern population. Such fine-scale structuring in migratory birds is rare. Our results provide a case study of fragmentation's impact on a species with specialist resource requirements at its range limit. Similar demographic declines in nightjars and other long-distance migrants across Northern and Western Europe suggest that genetic patterns seen in the British population may reflect those in other nightjar populations and European avifauna. Whilst our results indicate no immediate conservation concern, they depict a trajectory of declining genetic diversity, increasing inbreeding and genetic structure, potentially shared with other migratory species. Our study highlights the value of applying spatiotemporal population genetics analysis to migratory birds, despite their inherent vagility.","PeriodicalId":210,"journal":{"name":"Molecular Ecology","volume":" ","pages":"e17805"},"PeriodicalIF":4.5,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144223864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Admixture Affects the Rate and Repeatability of Experimental Adaptation to a Stressful Environment in Callosobruchus maculatus. 添加剂影响斑马鱼对应激环境的实验适应速率和重复性。

IF 4.5 1区生物学

Molecular Ecology Pub Date : 2025-06-04 DOI: 10.1111/mec.17809

Amy Springer, Brian Kissmer, Zachariah Gompert

{"title":"Admixture Affects the Rate and Repeatability of Experimental Adaptation to a Stressful Environment in Callosobruchus maculatus.","authors":"Amy Springer, Brian Kissmer, Zachariah Gompert","doi":"10.1111/mec.17809","DOIUrl":"https://doi.org/10.1111/mec.17809","url":null,"abstract":"Hybridisation and admixture are common in nature and can serve as important sources of adaptive potential by generating novel genotype combinations and phenotypes. However, hybrid incompatibilities can also reduce hybrid fitness. Given the pervasiveness of admixture and its potential role in facilitating adaptation, understanding how admixture influences the rate and repeatability of evolution is critical for advancing our understanding of evolutionary dynamics. Yet, few studies have examined how patterns of evolutionary repeatability in admixed lineages are shaped by strong ecological pressures. In this experiment, we evaluated patterns of evolution and repeatability in admixed and non-admixed cowpea seed beetles (Callosobruchus maculatus) adapting to a novel, stressful host: lentil. Specifically, we asked (1) whether admixture facilitates adaptation to lentil, (2) whether repeatability is greater in admixed or non-admixed lineages, and (3) to what extent repeatability in admixed lineages is driven by selection on globally adaptive alleles versus epistatic effects and hybrid incompatibilities. We found that admixture facilitated adaptation to lentil, and evolutionary rescue-defined as adaptation that prevents population extinction-occurred in all lineages. Evolutionary repeatability was highest in two admixed lineages, though evident across all lineages. Adaptation to lentil appeared largely driven by selection on globally adaptive alleles. Nevertheless, even under conditions of evolutionary rescue in a marginal environment, the purging of hybrid incompatibilities contributed substantially to repeated evolution in admixed lineages.","PeriodicalId":210,"journal":{"name":"Molecular Ecology","volume":" ","pages":"e17809"},"PeriodicalIF":4.5,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144214412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Landscape Genomics Provides Insights Into Climate Change-Driven Vulnerability in Torrent Frogs (Ranidae: Amolops). 景观基因组学提供了对气候变化驱动的激流蛙（蛙科：沙蛙）脆弱性的见解。

IF 4.5 1区生物学

Molecular Ecology Pub Date : 2025-06-04 DOI: 10.1111/mec.17807

Na Wu, Qi Xiao, Ziyan Liao, Xiaoqin Shi, Jinliang Wang, Xiangjiang Zhan, Youhua Chen

{"title":"Landscape Genomics Provides Insights Into Climate Change-Driven Vulnerability in Torrent Frogs (Ranidae: Amolops).","authors":"Na Wu, Qi Xiao, Ziyan Liao, Xiaoqin Shi, Jinliang Wang, Xiangjiang Zhan, Youhua Chen","doi":"10.1111/mec.17807","DOIUrl":"https://doi.org/10.1111/mec.17807","url":null,"abstract":"Anthropogenic climate change has caused widespread loss of species biodiversity and ecosystem productivity worldwide, with amphibians being particularly affected. Predicting the future of amphibians, a critical group for maintaining biodiversity and for balancing ecosystem structure and function, is essential for effective conservation planning in the Anthropocene. In this study, we used Amolops species as a model to assess their vulnerabilities under future climate change. Through genotype-environment association (GEA) analyses, we identified climate-associated SNPs, revealing that temperature and precipitation were key drivers for local adaptation in these species. Genetic offset analysis showed that the marginal and high-latitude populations of the Amolops mantzorum and Amolops monticola groups were at greater risk of local extinction as a result of a mismatch of genetic-environmental associations under future climate conditions. Ecological niche models predicted that, from 2011 to 2100, approximately 67% of Amolops species would experience significant habitat loss. We introduced the life strategy index (LSI) to assess species vulnerability, considering the interplays of evolution, ecology, and colonisation. Our LSI analysis showed that Amolops deng and Amolops tuberodepressus face a high extinction risk, in contrast with A. mantzorum, features strong adaptability and a low extinction risk. The LSI framework not only enables the systematic assessment of species vulnerability but also identifies key contributing factors through comprehensive evaluation across ecological, evolutionary, and colonisation dimensions, thereby facilitating the development of targeted conservation strategies.","PeriodicalId":210,"journal":{"name":"Molecular Ecology","volume":" ","pages":"e17807"},"PeriodicalIF":4.5,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144223863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hybrid Zone Analysis Using Coalescent-Based Estimates of Introgression and Migration in Plateau Fence Lizards (Sceloporus tristichus). 基于聚结估算的高原栅栏蜥蜴（Sceloporus tristichus）入侵和迁移的杂交带分析

IF 4.5 1区生物学

Molecular Ecology Pub Date : 2025-06-04 DOI: 10.1111/mec.17819

Adam D Leaché, Hayden R Davis, Sonal Singhal

{"title":"Hybrid Zone Analysis Using Coalescent-Based Estimates of Introgression and Migration in Plateau Fence Lizards (Sceloporus tristichus).","authors":"Adam D Leaché, Hayden R Davis, Sonal Singhal","doi":"10.1111/mec.17819","DOIUrl":"https://doi.org/10.1111/mec.17819","url":null,"abstract":"Coalescent modelling of hybrid zones can provide novel insights into the historical demography of populations, including divergence times, population sizes, introgression proportions, migration rates and the timing of hybrid zone formation. We used coalescent analysis to determine whether the hybrid zone between phylogeographic lineages of the Plateau Fence Lizard (Sceloporus tristichus) in Arizona formed recently due to human-induced landscape changes, or if it originated during Pleistocene climatic shifts. Given the presence of mitochondrial DNA from another species in the hybrid zone (Southwestern Fence Lizard, S. cowlesi), we tested for the presence of S. cowlesi nuclear DNA in the hybrid zone as well as reassessed the species boundary between S. tristichus and S. cowlesi. No evidence of S. cowlesi nuclear DNA is found in the hybrid zone, and the paraphyly of both species raises concerns about their taxonomic validity. Introgression analysis placed the divergence time between the parental hybrid zone populations at approximately 140 kya and their secondary contact and hybridization at approximately 11 kya at the end of the Pleistocene. Introgression proportions estimated for hybrid populations are correlated with their geographic distance from parental populations. The multispecies coalescent with migration provided significant support for unidirectional migration moving from south to north, which is consistent with spatial cline analyses that suggest a slow but steady northward shift of the centre of the hybrid zone over the last two decades. When analysing hybrid populations sampled along a linear transect, coalescent methods can provide novel insights into hybrid zone dynamics.","PeriodicalId":210,"journal":{"name":"Molecular Ecology","volume":" ","pages":"e17819"},"PeriodicalIF":4.5,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144214413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0