Abstract:
:How rapidly natural selection sorts genome-wide standing genetic variation during adaptation remains largely unstudied experimentally. Here, we present a genomic release-recapture experiment using paired threespine stickleback fish populations adapted to selectively different lake and stream habitats. First, we use pooled whole-genome sequence data from the original populations to identify hundreds of candidate genome regions likely under divergent selection between these habitats. Next, we generate F2 hybrids from the same lake-stream population pair in the laboratory and release thousands of juveniles into a natural stream habitat. Comparing the individuals surviving one year of stream selection to a reference sample of F2 hybrids allows us to detect frequency shifts across the candidate regions toward the genetic variants typical of the stream population-an experimental outcome consistent with polygenic directional selection. Our study reveals that adaptation in nature can be detected as a genome-wide signal over just a single generation.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Laurentino TG,Moser D,Roesti M,Ammann M,Frey A,Ronco F,Kueng B,Berner Ddoi
10.1038/s41467-020-15657-3subject
Has Abstractpub_date
2020-04-21 00:00:00pages
1928issue
1issn
2041-1723pii
10.1038/s41467-020-15657-3journal_volume
11pub_type
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