Quantitative genetic analysis of divergence in male secondary sexual traits between Drosophila simulans and Drosophila mauritiana
Evolution, ISSN: 0014-3820, Vol: 51, Issue: 3, Page: 816-832
1997
- 107Citations
- 59Captures
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Metrics Details
- Citations107
- Citation Indexes107
- 107
- CrossRef80
- Captures59
- Readers59
- 59
Article Description
The sibling species Drosophila simulans and D. mauritiana differ significantly in a number of male secondary sexual traits, providing an ideal system for genetic analysis of interspecific morphological divergence. In the experiment reported here, F hybrids from a cross of two inbred lines were backcrossed in both directions and about 200 flies from each backcross were scored for several traits (bristle numbers and cuticle areas), as well as 18 markers distributed throughout the genome. Each trait was analyzed by composite interval mapping to identify quantitative trait loci (QTL) and estimate their effects. For each trait, from one to eight loci were detected, with more divergent traits showing evidence for greater numbers of QTL. Estimates of additive effects varied widely, with a range of 0.4 to 4.1 environmental standard deviation units and an average of 2.2 units. There was substantial evidence for nonadditive effects, since the magnitude of estimates often differed significantly between the two backcrosses. The sign of the estimated effect differed among QTL for bristle traits, but not for cuticle area traits, suggesting that these two types of trait may have undergone different types of selection. Finally, several similarities were found between different traits in the estimated positions of QTL, suggesting that pleiotropy and/or linkage of QTL may have been important in the evolution of these traits.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0030831254&origin=inward; http://dx.doi.org/10.1111/j.1558-5646.1997.tb03664.x; http://www.ncbi.nlm.nih.gov/pubmed/28568599; https://academic.oup.com/evolut/article/51/3/816/6757308; https://dx.doi.org/10.1111/j.1558-5646.1997.tb03664.x; https://academic.oup.com/evolut/article-abstract/51/3/816/6757308?redirectedFrom=fulltext
Wiley
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