The genetic architecture of coordinately evolving male wing pigmentation and courtship behavior in Drosophila elegans and Drosophila gunungcola.
Bottom Line: On the autosomes, QTL locations for pigmentation and behavior were generally separate, but on the X chromosome two clusters of QTL were found affecting both wing pigmentation and courtship behavior.Pairwise tests for interactions between marker loci revealed evidence of epistasis between putative QTL for wing pigmentation but not those for courtship behavior.The clustering of X-linked QTL for male pigmentation and behavior is consistent with the concerted evolution of these traits and motivates fine-scale mapping studies to elucidate the nature of the contributing genetic factors in these intervals.
Affiliation: Department of Ecology and Evolution, Stony Brook University, Stony Brook, New York 11794-5245.Show MeSH
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Mentions: The positions of all detected QTL mapped onto the elegans (ele) and gunungcola (gun) backcross linkage maps are shown in Figure 1 and Figure S4, respectively. The male wing spot backcross datasets were scored in three different ways: a binary score (Spot Presence), spot size across the full data set (Spot Size 1), and spot size only among males with wing spots (Spot Size 2). Both IM and CIM methods were used for Spot Size 1 and 2 and only IM was used for Spot Presence (see the Materials and Methods). Putative QTL with their positions and effects are listed in Table 2. Figure 2, A and B shows the CIM maps of the ele and gun backcrosses respectively for Spot Size 1. Figure 2, C and D shows the CIM maps for the ele and gun backcrosses, respectively, for Spot Size 2. The Spot Presence analysis (Table 2) gave similar results to Spot Size 1. Many of the QTL were detected in more than one analysis and/or in both backcrosses. In the right hand column of Table 2, we have given these QTL the same name to reflect the hypothesis that in these cases one QTL underlies the effect that appears in multiple analyses and/or in both backcrosses. IM maps for Spot Size 1, Spot Size 2, and Courtship Score are shown in Figure S5.
Affiliation: Department of Ecology and Evolution, Stony Brook University, Stony Brook, New York 11794-5245.