期刊
ECOLOGY LETTERS
卷 17, 期 3, 页码 369-379出版社
WILEY
DOI: 10.1111/ele.12238
关键词
Adaptation; climate; ecological speciation; genome evolution; genomics; natural selection; next-generation sequencing; population genomics; Timema cristinae
类别
资金
- Direct For Biological Sciences
- Division Of Environmental Biology [1050947, 1050355] Funding Source: National Science Foundation
- Division Of Environmental Biology
- Direct For Biological Sciences [1050726, 1050149] Funding Source: National Science Foundation
Understanding natural selection's effect on genetic variation is a major goal in biology, but the genome-scale consequences of contemporary selection are not well known. In a release and recapture field experiment we transplanted stick insects to native and novel host plants and directly measured allele frequency changes within a generation at 186576 genetic loci. We observed substantial, genome-wide allele frequency changes during the experiment, most of which could be attributed to random mortality (genetic drift). However, we also documented that selection affected multiple genetic loci distributed across the genome, particularly in transplants to the novel host. Host-associated selection affecting the genome acted on both a known colour-pattern trait as well as other (unmeasured) phenotypes. We also found evidence that selection associated with elevation affected genome variation, although our experiment was not designed to test this. Our results illustrate how genomic data can identify previously underappreciated ecological sources and phenotypic targets of selection.
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