Chromosome-scale selective sweeps shape Caenorhabditis elegans genomic diversity.
Chromosome-scale selective sweeps shape Caenorhabditis elegans genomic diversity.
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DOI:
10.1038/ng.1050
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发表时间:
2012-01-29
期刊:
影响因子:
30.8
通讯作者:
Kruglyak, Leonid
中科院分区:
文献类型:
--
作者:
Andersen, Erik C.;Gerke, Justin P.;Shapiro, Joshua A.;Crissman, Jonathan R.;Ghosh, Rajarshi;Bloom, Joshua S.;Felix, Marie-Anne;Kruglyak, Leonid
The nematode Caenorhabditis elegans is central to research in molecular, cell, and developmental biology, but nearly all of this research has been conducted on a single strain. Comparatively little is known about the population genomic and evolutionary history of this species. We characterized C. elegans genetic variation by high-throughput selective sequencing of a worldwide collection of 200 wild strains, identifying 41,188 single nucleotide polymorphisms. Unexpectedly, C. elegans genome variation is dominated by a set of commonly shared haplotypes on four of the six chromosomes, each spanning many megabases. Population-genetic modeling shows that this pattern was generated by chromosome-scale selective sweeps that have reduced variation worldwide; at least one of these sweeps likely occurred in the past few hundred years. These sweeps, which we hypothesize to be a result of human activity, have dramatically reshaped the global C. elegans population in the recent past.
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