Genetic diversity, demographic history and neo-sex chromosomes in the critically endangered Raso lark
| Autor: | H. Pieter J. van Veelen, Elisa G. Dierickx, Simon Yung Wa Sin, M. de L. Brooke, Simon H. Martin, Yang Liu, Scott V. Edwards |
|---|---|
| Přispěvatelé: | Tieleman lab |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
demography 01 natural sciences Effective population size Environmental Science(all) Inbreeding Passeriformes recombination suppression General Environmental Science RISK 0303 health sciences education.field_of_study Cape Verde Genome Sex Chromosomes Agricultural and Biological Sciences(all) biology Population size ALAUDA-RAZAE Alauda conservation General Medicine island endemic EXTINCTION General Agricultural and Biological Sciences Research Article Demographic history POPULATION-SIZE Population GENOMES 010603 evolutionary biology General Biochemistry Genetics and Molecular Biology Cape verde 03 medical and health sciences Immunology and Microbiology(all) Animals Humans Raso lark education 030304 developmental biology Population Density Genetic diversity General Immunology and Microbiology Biochemistry Genetics and Molecular Biology(all) Endangered Species Genetic Variation biology.organism_classification EVOLUTION Genetics Population Haplotypes Evolutionary biology |
| Zdroj: | Proceedings of the Royal Society of London. Series B, Biological Sciences, 287(1922):20192613. ROYAL SOC Dierickx, E G, Sin, S Y W, van Veelen, H P J, Brooke, M D L, Liu, Y, Edwards, S V & Martin, S H 2020, ' Genetic diversity, demographic history and neo-sex chromosomes in the Critically Endangered Raso lark ', Proceedings. Biological sciences, vol. 287, no. 1922 . https://doi.org/10.1098/rspb.2019.2613, https://doi.org/10.6084/m9.figshare.c.4860630 Proceedings of the Royal Society B: Biological Sciences |
| ISSN: | 0962-8452 |
| Popis: | Small effective population sizes could expose island species to inbreeding and loss of genetic variation. Here, we investigate factors shaping genetic diversity in the Raso lark, which has been restricted to a single islet for approximately 500 years, with a population size of a few hundred. We assembled a reference genome for the related Eurasian skylark and then assessed diversity and demographic history using RAD-seq data (75 samples from Raso larks and two related mainland species). We first identify broad tracts of suppressed recombination in females, indicating enlarged neo-sex chromosomes. We then show that genetic diversity across autosomes in the Raso lark is lower than in its mainland relatives, but inconsistent with long-term persistence at its current population size. Finally, we find that genetic signatures of the recent population contraction are overshadowed by an ancient expansion and persistence of a very large population until the human settlement of Cape Verde. Our findings show how genome-wide approaches to study endangered species can help avoid confounding effects of genome architecture on diversity estimates, and how present-day diversity can be shaped by ancient demographic events. |
| Databáze: | OpenAIRE |
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