4.7 Article

A genome-wide investigation of adaptive signatures in protein-coding genes related to tool behaviour in New Caledonian and Hawaiian crows

期刊

MOLECULAR ECOLOGY
卷 30, 期 4, 页码 973-986

出版社

WILEY
DOI: 10.1111/mec.15775

关键词

corvids; genomics; selection; tool use

资金

  1. RSNZ Marsden Royal Society of New Zealand Fund [UOA1208]
  2. Knut och Alice Wallenbergs Stiftelse
  3. Deutsche Forschungsgemeinschaft [KU 3402/1-1]
  4. UK's Biotechnology and Biological Sciences Research Council [BB/G023913/2]
  5. Japanese Society for Promotion of Science Postdoctoral Fellowship
  6. Lawski foundation
  7. St Andrews 600th Anniversary PhD Studentship grant [NE/L501852/1]
  8. Swedish Research Council Vetenskapsradet [621-2013-4510]
  9. H2020 European Research Council [ERCStG-336536 FuncSpecGen]
  10. BBSRC [BB/G023913/2] Funding Source: UKRI

向作者/读者索取更多资源

The study sequenced the genomes of two tool-using crow species and ten non-tool-using crow species, finding signals of recent selection near genes associated with bill morphology in the tool-using New Caledonian crows, but indicating subtle genetic changes in the two lineages with little evidence of convergence. The research explores biological explanations for these findings and suggests that statistical power to detect selection in recently diverged lineages may have been insufficient. This study contributes to understanding the genetic basis of recently evolved complex behaviors.
Very few animals habitually manufacture and use tools. It has been suggested that advanced tool behaviour co-evolves with a suite of behavioural, morphological and life history traits. In fact, there are indications for such an adaptive complex in tool-using crows (genus Corvus species). Here, we sequenced the genomes of two habitually tool-using and ten non-tool-using crow species to search for genomic signatures associated with a tool-using lifestyle. Using comparative genomic and population genetic approaches, we screened for signals of selection in protein-coding genes in the tool-using New Caledonian and Hawaiian crows. While we detected signals of recent selection in New Caledonian crows near genes associated with bill morphology, our data indicate that genetic changes in these two lineages are surprisingly subtle, with little evidence at present for convergence. We explore the biological explanations for these findings, such as the relative roles of gene regulation and protein-coding changes, as well as the possibility that statistical power to detect selection in recently diverged lineages may have been insufficient. Our study contributes to a growing body of literature aiming to decipher the genetic basis of recently evolved complex behaviour.

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