High Stressful Temperature and Genetic Variation of Five Quantitative Traits in Drosophila Melanogaster |
| |
Authors: | Oleg A Bubliy Volker Loeschcke |
| |
Institution: | (1) Vavilov Institute of General Genetics, Gubkin Street 3, 119991 Moscow, Russia;(2) Department of Ecology and Genetics, University of Aarhus, Ny Munkegade, Building 540, DK-8000 Aarhus C, Denmark |
| |
Abstract: | Variation of five quantitative traits (thorax length, wing length, sternopleural bristle number, developmental time and larva-to-adult
viability) was studied in Drosophila melanogaster reared at standard (25°C) and high stressful (32°C) temperatures using half-sib analysis. In all traits, both phenotypic
and environmental variances increased at 32°C. For genetic variances, only two statistically significant differences between
temperature treatments were found: the among-sire variance of viability and the among-dam variance of developmental time were
higher under stress. Among-sire genetic variances and evolvabilities were generally higher at 32°C but narrow sense heritabilities
were not. The results of the present work considered in the context of other studies in D. melanogaster indicate different patterns of genetic variation between stressful and nonstressful environments for the traits examined.
Data on thorax length and viability agree with the hypothesis that genetic variance can be increased under extreme environmental
conditions.
This revised version was published online in July 2006 with corrections to the Cover Date. |
| |
Keywords: | Drosophila melanogaster environmental stress genetic variation heritability high temperature |
本文献已被 PubMed SpringerLink 等数据库收录! |
|