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Article: Genetic diversity, demographic history and neo-sex chromosomes in the Critically Endangered Raso lark

TitleGenetic diversity, demographic history and neo-sex chromosomes in the Critically Endangered Raso lark
Authors
KeywordsRecombination suppression
Alauda
Conservation
Cape Verde
Island endemic
Demography
Issue Date2020
PublisherThe Royal Society Publishing. The Journal's web site is located at http://rspb.royalsocietypublishing.org/
Citation
Proceedings of the Royal Society B: Biological Sciences, 2020, v. 287 n. 1922, article no. 20192613 How to Cite?
AbstractSmall 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.
Persistent Identifierhttp://hdl.handle.net/10722/286503
ISSN
2023 Impact Factor: 3.8
2023 SCImago Journal Rankings: 1.692
PubMed Central ID
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorDierickx, EG-
dc.contributor.authorSin, SYW-
dc.contributor.authorvan Veelen, HPJ-
dc.contributor.authorBrooke, MDL-
dc.contributor.authorLiu, Y-
dc.contributor.authorEdwards, SV-
dc.contributor.authorMartin, SH-
dc.date.accessioned2020-08-31T07:04:46Z-
dc.date.available2020-08-31T07:04:46Z-
dc.date.issued2020-
dc.identifier.citationProceedings of the Royal Society B: Biological Sciences, 2020, v. 287 n. 1922, article no. 20192613-
dc.identifier.issn0962-8452-
dc.identifier.urihttp://hdl.handle.net/10722/286503-
dc.description.abstractSmall 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.-
dc.languageeng-
dc.publisherThe Royal Society Publishing. The Journal's web site is located at http://rspb.royalsocietypublishing.org/-
dc.relation.ispartofProceedings of the Royal Society B: Biological Sciences-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.subjectRecombination suppression-
dc.subjectAlauda-
dc.subjectConservation-
dc.subjectCape Verde-
dc.subjectIsland endemic-
dc.subjectDemography-
dc.titleGenetic diversity, demographic history and neo-sex chromosomes in the Critically Endangered Raso lark-
dc.typeArticle-
dc.identifier.emailSin, SYW: sinyw@hku.hk-
dc.identifier.authoritySin, SYW=rp02377-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1098/rspb.2019.2613-
dc.identifier.pmid32126957-
dc.identifier.pmcidPMC7126062-
dc.identifier.scopuseid_2-s2.0-85081043142-
dc.identifier.hkuros313464-
dc.identifier.volume287-
dc.identifier.issue1922-
dc.identifier.spagearticle no. 20192613-
dc.identifier.epagearticle no. 20192613-
dc.identifier.isiWOS:000521569300005-
dc.publisher.placeUnited Kingdom-
dc.identifier.issnl0962-8452-

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