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SELECTION ON COPULATION DURATION IN DROSOPHILA MELANOGASTER : PREDICTABILITY OF DIRECT RESPONSE VERSUS UNPREDICTABILITY OF CORRELATED RESPONSE
Author(s) -
Gromko Mark H.,
Briot Amy,
Jensen Susan C.,
Fukui H. Hank
Publication year - 1991
Publication title -
evolution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.84
H-Index - 199
eISSN - 1558-5646
pISSN - 0014-3820
DOI - 10.1111/j.1558-5646.1991.tb05267.x
Subject(s) - biology , predictability , drosophila melanogaster , selection (genetic algorithm) , duration (music) , direct response , evolutionary biology , functional response , drosophila (subgenus) , fight or flight response , genetics , statistics , ecology , machine learning , gene , computer science , mathematics , art , literature , digital marketing , world wide web , predation , predator
Estimates of heritabilities and genetic correlations for seven reproductive attributes had previously been obtained from parent‐offspring regression (Gromko, 1987, 1989). Copulation duration was shown to have a heritability of 0.23 and to be genetically correlated with courtship vigor ( r A = −0.41) and with fertility ( r A = 0.27). These observations form the basis for the prediction of direct and correlated responses to selection for increased and decreased copulation duration, which are reported here. The direct response corresponded closely to prediction, but the correlated responses did not provide consistent qualitative fit. A hypothesis is proposed to explain this difference in predictability of direct and correlated response to selection. The major postulate is that the different polygenes involved in the direct response to selection for copulation duration have different pleiotropic effects.