CHANGES IN THE HERITABILITY OF 5 MORPHOLOGICAL TRAITS UNDER COMBINED ENVIRONMENTAL STRESSES IN DROSOPHILA-MELANOGASTER

Citation
Aa. Hoffmann et M. Schiffer, CHANGES IN THE HERITABILITY OF 5 MORPHOLOGICAL TRAITS UNDER COMBINED ENVIRONMENTAL STRESSES IN DROSOPHILA-MELANOGASTER, Evolution, 52(4), 1998, pp. 1207-1212
Citations number
32
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Biology Miscellaneous","Genetics & Heredity",Ecology
Journal title
ISSN journal
0014-3820
Volume
52
Issue
4
Year of publication
1998
Pages
1207 - 1212
Database
ISI
SICI code
0014-3820(1998)52:4<1207:CITHO5>2.0.ZU;2-J
Abstract
Heritabilities and evolvabilities for morphological traits were compar ed between two environments in Drosophila melanogaster using parent-of fspring 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 decrea sed viability. For wing traits, heritabilities were relatively lower i n the stressful environment, while heritabilities for bristle traits w ere not influenced by conditions. Heritability changes were largely du e to an increase in the environmental variance under stress, whereas l evels of additive genetic variance were relatively constant. Evolvabil ities were similar between environments except for crossvein length.