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CHANGES IN THE HERITABILITY OF FIVE MORPHOLOGICAL TRAITS UNDER COMBINED ENVIRONMENTAL STRESSES IN DROSOPHILA MELANOGASTER
Author(s) -
Hoffmann Ary A.,
Schiffer Michele
Publication year - 1998
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.1558-5646.1998.tb01847.x
Subject(s) - biology , heritability , bristle , drosophila melanogaster , wing , environmental stress , gene–environment interaction , offspring , genetic correlation , evolutionary biology , genetics , genetic variation , zoology , gene , genotype , pregnancy , brush , aerospace engineering , electrical engineering , engineering
Heritabilities and evolvabilities for morphological traits were compared between two environments in Drosophila melanogaster using parent‐offspring comparisons. One of the environments was favorable. The other stressful environment involved a combination of repeated cold shocks, poor nutrition, and ethanol added to the medium, which markedly decreased viability. For wing traits, heritabilities were relatively lower in the stressful environment, while heritabilities for bristle traits were not influenced by conditions. Heritability changes were largely due to an increase in the environmental variance under stress, whereas levels of additive genetic variance were relatively constant. Evolvabilities were similar between environments except for crossvein length.