Journal
MOLECULAR ECOLOGY
Volume 16, Issue 14, Pages 2844-2851Publisher
WILEY
DOI: 10.1111/j.1365-294X.2007.03324.x
Keywords
abdominal pigmentation; Drosophila melanogaster; ebony; ecological adaptation; partial selective sweep; sub-Saharan populations
Funding
- NIGMS NIH HHS [GM36431, R01 GM036431, R01 GM036431-14] Funding Source: Medline
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In a broad survey of Drosophila melanogaster population samples, levels of abdominal pigmentation were found to be highly variable and geographically differentiated. A strong positive correlation was found between dark pigmentation and high altitude, suggesting adaptation to specific environments. DNA sequence polymorphism at the candidate gene ebony revealed a clear association with the pigmentation of homozygous third chromosome lines. The darkest lines sequenced had nearly identical haplotypes spanning 14.5 kb upstream of the protein-coding exons of ebony. Thus, natural selection may have elevated the frequency of an allele that confers dark abdominal pigmentation by influencing the regulation of ebony.
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