Indy gene variation in natural populations confers fitness advantage and life span extension through transposon insertion.

ABSTRACT: Natural selection acts to maximize reproductive fitness. However, antagonism between life span and reproductive success frequently poses a dilemma pitting the cost of fecundity against longevity. Here, we show that natural populations of Drosophila melanogaster harbor a Hoppel transposon insertion variant in the longevity gene Indy (I'm not dead yet), which confers both increased reproduction and longevity through metabolic changes. Heterozygosity for this natural long-lived variant has been maintained in isolates despite long-term inbreeding under laboratory conditions and advantageously confers increased fecundity. DNA sequences of variant chromosome isolates show evidence of selective sweep acting on the advantageous allele, suggesting that natural selection acts to maintain this varian

SUBMITTER: Zhu CT 

PROVIDER: S-EPMC3927810 | biostudies-literature | 2014 Jan

REPOSITORIES: biostudies-literature