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• W2169221724 endingPage "3800" @default.
• W2169221724 startingPage "3787" @default.
• W2169221724 abstract "Stalk-eyed flies (Diptera: Diopsidae) possess eyes at the ends of elongated peduncles, and exhibit dramatic variation in eye span, relative to body length, among species. In some sexually dimorphic species, evidence indicates that eye span is under both intra- and intersexual selection. Theory predicts that isolated populations should evolve differences in sexually selected traits due to drift. To determine if eye span changes as a function of divergence time, 1370 flies from 10 populations of the sexually dimorphic species, Cyrtodiopsis dalmanni and Cyrtodiopsis whitei, and one population of the sexually monomorphic congener, Cyrtodiopsis quinqueguttata, were collected from Southeast Asia and measured. Genetic differentiation was used to assess divergence time by comparing mitochondrial (cytochrome oxidase II and 16S ribosomal RNA gene fragments) and nuclear (wingless gene fragment) DNA sequences for c. five individuals per population. Phylogenetic analyses indicate that most populations cluster as monophyletic units with up to 9% nucleotide substitutions between populations within a species. Analyses of molecular variance suggest a high degree of genetic structure within and among the populations; > 97% of the genetic variance occurs between populations and species while < 3% is distributed within populations, indicating that most populations have been isolated for thousands of years. Nevertheless, significant change in the allometric slope of male eye span on body length was detected for only one population of either dimorphic species. These results are not consistent with genetic drift. Rather, relative eye span appears to be under net stabilizing selection in most populations of stalk-eyed flies. Given that one population exhibited dramatic evolutionary change, selection, rather than genetic variation, appears to constrain eye span evolution." @default.
• W2169221724 created "2016-06-24" @default.
• W2169221724 creator A5000640083 @default.
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• W2169221724 creator A5034657387 @default.
• W2169221724 creator A5062246504 @default.
• W2169221724 creator A5073931470 @default.
• W2169221724 date "2005-08-26" @default.
• W2169221724 modified "2023-10-12" @default.
• W2169221724 title "Genetic divergence does not predict change in ornament expression among populations of stalk-eyed flies" @default.
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• W2169221724 doi "https://doi.org/10.1111/j.1365-294x.2005.02691.x" @default.
• W2169221724 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/16202096" @default.
• W2169221724 hasPublicationYear "2005" @default.
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