Evolutionary Applications最新文献

{"title":"Conservation Units for Anadromous Arctic Char (<i>Salvelinus alpinus</i>) in the Canadian Arctic Informed by Genetic Structure, Population Connectivity and Adaptive Genomic Variation.","authors":"Xavier Dallaire, Anne Beemelmanns, Les Harris, Colin P Gallagher, Ross Tallman, Jean-Sébastien Moore","doi":"10.1111/eva.70259","DOIUrl":"10.1111/eva.70259","url":null,"abstract":"<p><p>Intraspecific genetic diversity is a crucial aspect of biodiversity conservation as it preserves evolutionary potential and enhances resilience to environmental change. Genomic-informed delineation of Conservation Units (CUs) offers ways of subdividing species into groups based on demographic independence and adaptive differentiation, to develop biologically relevant conservation and management policies. CUs have been defined in many species of harvested anadromous salmonids, but broad-scale data remain lacking in the Canadian Arctic, where anadromous Arctic Char (<i>Salvelinus alpinus</i>) dominates catches in Indigenous-led subsistence and commercial fisheries. In this study, we use low-coverage whole-genome data from 30 Canadian Arctic Char populations to define CUs based on population structure, connectivity, and adaptive genetic variation. We highlight two main genetic groups, each of which comprises three subgroups, or candidate CUs: the North (above the 67th parallel), including the North Baffin Island, Kitikmeot, and Inuvialuit Settlement Region CUs; and the South (below the 67th parallel), including the South Baffin Island, Ungava Bay, and Hudson Bay CUs. This delimitation is supported by areas of low effective migration between candidate CUs, as well as isolation-by-environment, which suggests adaptive differentiation. Finally, we discuss opportunities and caveats related to genetic linkage when identifying adaptive variation from whole-genome sequencing data using genome scans and gene-environment associations.</p>","PeriodicalId":168,"journal":{"name":"Evolutionary Applications","volume":"19 5","pages":"e70259"},"PeriodicalIF":3.2,"publicationDate":"2026-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13238756/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148196773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":168,"journal":{"name":"Evolutionary Applications","volume":"19 5","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148089228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Glacial History and Landscape Features Shape the Hierarchical Population Genetic Structure of Woodland Caribou (<i>Rangifer tarandus caribou</i>) in Western Canada.","authors":"Samuel Deakin, Anita Michalak, Maria Cavedon, Charlotte Bourbon, Margaret M Hughes, Lalenia Neufeld, Agnès Pelletier, Jean Polfus, Helen Schwantje, Robin Steenweg, Caeley Thacker, Madeline Trottier, Marco Musiani, Jocelyn Poissant","doi":"10.1111/eva.70269","DOIUrl":"10.1111/eva.70269","url":null,"abstract":"<p><p>Characterising hierarchical population structure is crucial to understanding a species' evolutionary history and informing effective conservation and management strategies. Many terrestrial species in North America have experienced a wide range of evolutionary pressures at multiple scales, ranging from large-scale range shifts and recolonisations driven by glacial cycles to more localized contemporary habitat degradation and fragmentation. Hence in this region, given the multi-level evolutionary forces at play, genetic variation and diversity are often hierarchically structured. We analysed genomic diversity and variation in woodland caribou (<i>Rangifer tarandus caribou</i>) across western Canada using genotypes from ~33,000 Single Nucleotide Polymorphism (SNP) loci from 759 geo-referenced individuals spanning 45 pre-defined subpopulations. We employed genetic clustering methods and measures of genetic differentiation to characterise hierarchical population structure in the region and tested for latitudinal changes in heterozygosity resulting from post-glacial recolonisation and hybridisation. Our results confirm that woodland caribou genetic diversity and differentiation occur at multiple hierarchical levels, reflecting post-glacial recolonisation patterns and landscape heterogeneity. Notably, the major genetic clusters identified in our study do not align with current recognised units for the species in this region. We also observe elevated heterozygosity in the mid-latitudes of the sampled range, indicative of hybridisation following secondary contact during post-glacial recolonisation. These findings underscore the need to consider and include genetic diversity at all hierarchical levels in conservation planning, as wide-ranging species often experience diverse and complex evolutionary histories and pressures.</p>","PeriodicalId":168,"journal":{"name":"Evolutionary Applications","volume":"19 5","pages":"e70269"},"PeriodicalIF":3.2,"publicationDate":"2026-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13239864/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148196692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":168,"journal":{"name":"Evolutionary Applications","volume":"19 5","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148118128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":168,"journal":{"name":"Evolutionary Applications","volume":"19 5","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148085301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Genome-Wide Homozygosity Predicts Inbreeding Depression in the Hihi/Stitchbird (<i>Notiomystis cincta</i>) Better Than Realised Load.","authors":"Hui Zhen Tan, Katarina C Stuart, Joseph Guhlin, Tram Vi, Selina Patel, Laura Duntsch, John G Ewen, Patricia Brekke, Anna W Santure","doi":"10.1111/eva.70252","DOIUrl":"10.1111/eva.70252","url":null,"abstract":"<p><p>Population declines result in increasingly small populations, which often experience an increase in inbreeding. Inbreeding may be negatively associated with fitness traits like survival and reproduction, that is, inbreeding depression, and is therefore detrimental to population persistence and adaptive potential. Realised genetic load-the count of homozygous deleterious alleles-is increasingly used as a proxy for fitness when investigating inbreeding depression. However, assessing the limitations of genetic load in predicting fitness, and comparisons with other homozygosity and inbreeding metrics, are needed. Our study system is the hihi/stitchbird (<i>Notiomystis cincta</i>), a forest bird endemic to Aotearoa, New Zealand. The hihi was extirpated from the North Island in the late 1800s and underwent a prolonged bottleneck on an island before reintroduction efforts began in 1980. In this study, we used imputed whole-genome resequencing data of over 400 individuals spanning two decades from Tiritiri Matangi, the largest reintroduced population. We quantified inbreeding using runs of homozygosity (ROH), annotated variants using variant effect predictor, and detected variants related to lifetime reproductive success (LRS) through a genome-wide association study (GWAS). We then tested for inbreeding depression by modelling LRS against genome-wide homozygosity, homozygosity in coding regions, inbreeding (F_ROH) and realised load. We found moderately high inbreeding levels in the hihi (mean F_ROH = 0.27). GWAS revealed two variants associated with LRS that are in or near genes associated with laying performance and yolk weight in other birds. We found genome-wide homozygosity to best predict fitness, although F_ROH may be more useful at lower SNP densities. A relationship between realised genetic load and fitness likely reflects genome-wide homozygosity levels, and high-impact SNPs may present a misleading proxy for fitness. Our study provides support for genetic exchange to reduce inbreeding levels and contributes to a greater understanding of small population genetics and measures of inbreeding depression.</p>","PeriodicalId":168,"journal":{"name":"Evolutionary Applications","volume":"19 5","pages":"e70252"},"PeriodicalIF":3.2,"publicationDate":"2026-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13240288/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148196750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":168,"journal":{"name":"Evolutionary Applications","volume":"19 5","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148116976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":168,"journal":{"name":"Evolutionary Applications","volume":"19 5","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148083971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":168,"journal":{"name":"Evolutionary Applications","volume":"19 5","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148083972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tangled Evolutionary History: Genetically Divergent Taxa and Hybrids Characterise Lantana Invasions in Australia.","authors":"Patricia Lu-Irving, Francisco Encinas-Viso, Eilish McMaster, Jason Callander, Michael D Day, Johannes J Le Roux","doi":"10.1111/eva.70251","DOIUrl":"10.1111/eva.70251","url":null,"abstract":"<p><p>This study investigated population genomic diversity and structure in the taxonomically complicated and highly invasive <i>Lantana camara</i> L. (Verbenaceae) species complex in Australia. We considered taxonomy, spatial distribution and patterns of morphological and genetic variation in populations across the main invaded area (i.e., coastal and subcoastal eastern Australia across 22° latitude), and reconstructed their relationships with native-range plants sampled from the Americas. We used DArTseq to generate genome-wide single nucleotide polymorphism (SNP) data for > 600 individuals and analysed data from > 20,000 SNPs to identify genetic structure, and test the extent to which it corresponded with taxonomic descriptions and morphotype concepts used in current lantana biological control programmes. A subset of individuals was also evaluated for ploidy variation using flow cytometry. We used MaxEnt to predict suitable habitat for invasive lantana in Australia, and compared predictions with current distribution patterns, together with variation in morphology and biological control agent susceptibility. Invasive lantana in Australia was not clearly related to any native-range <i>Lantana</i> species. Instead, it was characterised as a mosaic of several distinct and divergent genetic lineages, from common and widespread to rare and localised, interspersed with occasional inter-lineage hybrids. This complexity explains why the taxonomy of invasive lantana has been (and will continue to be) challenging. Nevertheless, the main genetic lineages identified here were in agreement with published taxonomic concepts (varieties). Two of these varieties (Common Pink and Common Pink-Edged Red) were found to be dominant, widespread and occupying the full extent of their predicted suitable habitat in Australia. Failing to distinguish different taxa within invasive lantana may affect the success of biological control; taxonomic revision is thus needed to comprehensively define invasive taxa and provide broadly-applicable tools to identify them accurately.</p>","PeriodicalId":168,"journal":{"name":"Evolutionary Applications","volume":"19 5","pages":"e70251"},"PeriodicalIF":3.2,"publicationDate":"2026-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13239396/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148196455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}