Genetic Analysis of a Morphological Shape Difference in the Male Genitalia of Drosophila simulans and D. mauritiana (original) (raw)
Journal Article
,
Department of Zoology
, Duke University, Durham, North Carolina 27708
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,
Department of Zoology
, Duke University, Durham, North Carolina 27708
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,
Department of Zoology
, Duke University, Durham, North Carolina 27708
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,
Department of Zoology
, Duke University, Durham, North Carolina 27708
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,
Department of Statistics
, North Carolina State University, Raleigh, North Carolina 27695
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Department of Zoology
, Duke University, Durham, North Carolina 27708
Corresponding author: Cathy C. Laurie, DCMB/Zoology, Box 91000, Duke University, Durham, NC 27708. E-mail: cclaurie@acpub.duke.edu
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Present address: Department of Biology, University of Michigan, Ann Arbor, MI 48109.
Received:
07 September 1995
Accepted:
11 December 1995
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Jianjun Liu, John M Mercer, Lynn F Stam, Gregory C Gibson, Zhao-Bang Zeng, Cathy C Laurie, Genetic Analysis of a Morphological Shape Difference in the Male Genitalia of Drosophila simulans and D. mauritiana, Genetics, Volume 142, Issue 4, 1 April 1996, Pages 1129–1145, https://doi.org/10.1093/genetics/142.4.1129
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Abstract
Two closely related species of Drosophila, D. simulans and D. mauritiana, differ markedly in morphology of the posterior lobe of the male genital arch. Both size and shape aspects of lobe variation can be quantified by a morphometric descriptor based on elliptical Fourier and principal components analyses. The genetic architecture of this quantitative trait (PC1) was investigated by hybridizing inbred lines to produce two backcross populations of ~200 individuals each, which were analyzed jointly by a composite interval mapping procedure with the aid of 18 marker loci. The parental lines show a large difference in PC1 (30.4 environmental standard deviations), and the markers account for >80% of the phenotypic variation in backcross populations. Eight of 15 intervals analyzed show convincing evidence of quantitative trait loci (QTL), and the range of estimated QTL effects is 5.7–15.9% of the parental difference (1.7–4.8 environmental standard deviations). These estimates may represent the joint effects of multiple QTL within a single interval (which averaged 23 cM in length). Although there is some evidence of partial dominance of mauritiana alleles and for epistasis, the pattern of inheritance is largely additive.
Communicating editor: M. J. Simmons
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Author notes
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Present address: Department of Biology, University of Michigan, Ann Arbor, MI 48109.
© Genetics 1996
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