title: Temporal uniformity of the spontaneous mutational variance of quantitative traits in Drosophila melanogaster.
abstract: Spontaneous mutations were allowed to accumulate over 209 generations in more than 100 lines, all of them independently derived from a completely homozygous population of Drosophila melanogaster and subsequently maintained under strong inbreeding (equivalent to full-sib mating). Traits scored were: abdominal (AB) and sternopleural (ST) bristle number, wing length (WL) and egg-to-adult viability (V). On two occasions--early (generations 93-122) and late (generations 169-209)--ANOVA estimates of the mutational variance and the mutational line x generation interaction variance were obtained. Mutational heritabilities of morphological traits ranged from 2 x 10(-4) to 2 x 10(-3) and the mutational coefficient of variation of viability was 0.01. For AB, WL and V, temporal uniformity of the mutational variance was observed. However, a fluctuation of the mutational heritability of ST was detected and could be ascribed to random genotype x environment interaction.
authors.affiliation: Departamento de Genética, Facultad de Ciencias Biológicas, Universidad Complutense, Madrid, Spain. augardo@eucmax.sim.ucm.es
authors.forename: A
authors.initials: A
authors.lastname: García-Dorado
authors.forename: J
authors.initials: J
authors.lastname: Fernández
authors.forename: C
authors.initials: C
authors.lastname: López-Fanjul
mesh_terms: D000818:Animals; D004331:Drosophila melanogaster / Q000235:genetics*; D014644:Genetic Variation; D009154:Mutation; D019655:Quantitative Trait, Heritable