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Whole-genome phylog...
Whole-genome phylogeography of the blue-faced honeyeater (Entomyzon cyanotis) and discovery and characterization of a neo-Z chromosome
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- Burley, John T. (författare)
- Uppsala universitet,Evolutionsbiologi,Harvard Univ, Museum Comparat Zool, Cambridge, MA 02138 USA; Brown Univ, Dept Ecol Evolut & Organismal Biol, Providence, RI USA; Brown Univ, Inst Brown Environm & Soc, Providence, RI USA
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- Orzechowski, Sophia C. M. (författare)
- Harvard Univ, Museum Comparat Zool, Cambridge, MA 02138 USA.
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- Sin, Simon Yung Wa (författare)
- Harvard Univ, Museum Comparat Zool, Cambridge, MA 02138 USA.;Univ Hong Kong, Sch Biol Sci, Hong Kong, Peoples R China.
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- Edwards, Scott V. (författare)
- Harvard Univ, Museum Comparat Zool, Cambridge, MA 02138 USA.
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(creator_code:org_t)
- 2022-07-21
- 2023
- Engelska.
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Ingår i: Molecular Ecology. - : John Wiley & Sons. - 0962-1083 .- 1365-294X. ; 32:6, s. 1248-1270
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Whole-genome surveys of genetic diversity and geographic variation often yield unexpected discoveries of novel structural variation, which long-read DNA sequencing can help clarify. Here, we report on whole-genome phylogeography of a bird exhibiting classic vicariant geographies across Australia and New Guinea, the blue-faced honeyeater (Entomyzon cyanotis), and the discovery and characterization of a novel neo-Z chromosome by long-read sequencing. Using short-read genome-wide SNPs, we inferred population divergence events within E. cyanotis across the Carpentarian and other biogeographic barriers during the Pleistocene (~0.3–1.7 Ma). Evidence for introgression between nonsister populations supports a hypothesis of reticulate evolution around a triad of dynamic barriers around Pleistocene Lake Carpentaria between Australia and New Guinea. During this phylogeographic survey, we discovered a large (134 Mbp) neo-Z chromosome and we explored its diversity, divergence and introgression landscape. We show that, as in some sylvioid passerine birds, a fusion occurred between chromosome 5 and the Z chromosome to form a neo-Z chromosome; and in E. cyanotis, the ancestral pseudoautosomal region (PAR) appears nonrecombinant between Z and W, along with most of the fused chromosome 5. The added recombination-suppressed portion of the neo-Z (~37.2 Mbp) displays reduced diversity and faster population genetic differentiation compared with the ancestral-Z. Yet, the new PAR (~17.4 Mbp) shows elevated diversity and reduced differentiation compared to autosomes, potentially resulting from introgression. In our case, long-read sequencing helped clarify the genomic landscape of population divergence on autosomes and sex chromosomes in a species where prior knowledge of genome structure was still incomplete.
Ämnesord
- NATURVETENSKAP -- Biologi -- Evolutionsbiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Evolutionary Biology (hsv//eng)
- NATURVETENSKAP -- Biologi -- Genetik (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Genetics (hsv//eng)
Nyckelord
- Entomyzon cyanotis
- genome assembly
- introgression
- long-read sequencing
- neo-sex chromosome
- phylogeography
- population genomics
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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