Titre
The differential genetic and environmental canalization of fitness components in Drosophila melanogaster
Type
article
Institution
Externe
Périodique
Auteur(s)
Stearns, S.C.
Auteure/Auteur
Kaiser, M.
Auteure/Auteur
Kawecki, T.J.
Auteure/Auteur
Liens vers les personnes
ISSN
1010-061X
Statut éditorial
Publié
Date de publication
1995
Volume
8
Numéro
5
Première page
539
Dernière page/numéro d’article
558
Peer-reviewed
Oui
Langue
anglais
Résumé
Canalization describes the process by which phenotypic variation is reduced by developmental mechanisms. A trait can be canalized against environmental or genetic perturbations. Stabilizing selelction should favor improved canalization, and the degree of a trait's canalization should be positively correlated with its impact on fitness. Here we report, for Drosophila melanogaster, measurements of environmental canalization for five fitness components. We compare them with measurements of genetic canalization, and we discuss the impact of inbreeding on both. In three experiments we measured the variation of fitness components within lines nested within temperature, treatment, and experiment. Lines differed in the position of a P element insert or in genetic background. Within lines flies were genetically nearly identical. We designated trait variation within lines as environmental canalization. The canalization of the traits increased with their impact on fitness, and the pattern was similar to that found for the canalization of fitness components against genetic differences, measured as the variation among lines nested within temperature, treatment, and experiment. This suggests that developmental mechanisms buffer the phenotype against both genetic and environmental disturbance. The results also suggest, less strongly, that inbreeding weakens canalization.
PID Serval
serval:BIB_3D271E597BE5
Date de création
2007-11-19T09:17:24.571Z
Date de création dans IRIS
2025-05-20T14:02:50Z