caa a22 4500 445845503 CHVBK 20180317145357.0 cr unu---uuuuu 170323e20110401xx s 000 0 eng 10.1007/s10709-011-9572-2 doi (NATIONALLICENCE)springer-10.1007/s10709-011-9572-2 Condition dependence and the nature of genetic variation for male sex comb bristle number in Drosophila melanogaster [Elektronische Daten] [Abha Ahuja, Scott De Vito, Rama Singh] Genetic architecture of variation underlying male sex comb bristle number, a rapidly evolving secondary sexual character of Drosophila, was examined. First, in order to test for condition dependence, diet was manipulated in a set of ten Drosophila melanogaster full-sib families. We confirmed heightened condition dependent expression of sex comb bristle number and its female homologue (distal transverse row bristles) as compared to non-sex sternopleural bristles. Significant genotype by environment effects were detected for the sex traits indicating a genetic basis for condition dependence. Next we measured sex comb bristle number and sternopleural bristle number, as well as residual mass, a commonly used condition index, in a set of thirty half-sib families. Sire effect was not significant for sex comb and sternopleural bristle number, and we detected a strong dominance and/or maternal effect or X chromosome effect for both traits. A strong sire effect was detected for condition and its heritability was the highest as compared to sex comb and sternopleural bristles. We discuss our results in light of the rapid response to divergent artificial selection for sex comb bristle number reported previously. The nature of genetic variation for male sex traits continues to be an important unresolved issue in evolutionary biology. Springer Science+Business Media B.V., 2011 Condition dependence nationallicence Drosophila melanogaster nationallicence Sex comb nationallicence Condition nationallicence Genetic variation nationallicence Ahuja Abha Department of Biology, McMaster University, 1280 Main Street West, L8S 4K1, Hamilton, ON, Canada aut De Vito Scott Stewart Biology Building, 1205 avenue Docteur Penfield, H3H 1B1, Montreal, QC, Canada aut Singh Rama Department of Biology, McMaster University, 1280 Main Street West, L8S 4K1, Hamilton, ON, Canada aut Genetica Springer Netherlands 139/4(2011-04-01), 505-510 0016-6707 139:4<505 2011 139 10709 https://doi.org/10.1007/s10709-011-9572-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10709-011-9572-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ahuja Abha Department of Biology, McMaster University, 1280 Main Street West, L8S 4K1, Hamilton, ON, Canada aut NATIONALLICENCE 700 1- De Vito Scott Stewart Biology Building, 1205 avenue Docteur Penfield, H3H 1B1, Montreal, QC, Canada aut NATIONALLICENCE 700 1- Singh Rama Department of Biology, McMaster University, 1280 Main Street West, L8S 4K1, Hamilton, ON, Canada aut NATIONALLICENCE 773 0- Genetica Springer Netherlands 139/4(2011-04-01), 505-510 0016-6707 139:4<505 2011 139 10709 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer