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Quantitative genetics of ovariole number in Drosophila melanogaster. I. Segregating variation and fitness

Wayne, M.L. (North Carolina State University, Raleigh, NC.) ; Hackett, J.B ; Mackay, T.F.C

Evolution, 1997-08, Vol.51 (4), p.1156-1163 [Periódico revisado por pares]

United States: Society for the Study of Evolution

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Título:
Quantitative genetics of ovariole number in Drosophila melanogaster. I. Segregating variation and fitness
Autor: Wayne, M.L. (North Carolina State University, Raleigh, NC.) ; Hackett, J.B ; Mackay, T.F.C
Assuntos: Animal reproduction ; Body size ; Drosophila ; DROSOPHILA MELANOGASTER ; Ecological competition ; Evolutionary genetics ; GENETIC VARIATION ; GENETICA CUANTITATIVA ; Genetics ; GENETIQUE QUANTITATIVE ; GENOTYPE ENVIRONMENT INTERACTION ; Genotypes ; Insects ; INTERACCION GENOTIPO AMBIENTE ; INTERACTION GENOTYPE ENVIRONNEMENT ; Mutation ; OVAIRE ; OVARIES ; ovariole ; Ovarioles ; OVARIOS ; Phenotypic traits ; QUANTITATIVE GENETICS ; Quantitative traits ; REPRODUCTIVE FITNESS ; VARIACION GENETICA ; variation ; VARIATION GENETIQUE
É parte de: Evolution, 1997-08, Vol.51 (4), p.1156-1163
Notas: 9747113
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Descrição: The number of ovarioles of the Drosophila melanogaster ovary is a trait thought to be associated with female fecundity, and therefore is expected to be under strong natural selection. This hypothesis may be tested by examining patterns of genetic and environmental variation for ovariole number in natural populations, and by determining the association between ovariole number and fitness in isogenic lines derived from a natural population. We measured ovariole number, and competitive fitness and its components, for 48 homozygous chromosome 3 substitution lines in a standard inbred background; and body size in a sample of 15 chromosome 3 substitution lines. We found significant segregating genetic variation for ovariole number, with a broad-sense heritability (H2) of 0.403 and correspondingly high coefficients of genetic variation (CVG= 20.8) and residual variation (CVR= 25.3). Estimates of quantitative genetic parameters for body size (H2= 0.191, CVG= 2.15, and CVR= 3.87) are similar to those previously reported for this trait. Although the isogenic chromosome 3 substitution lines varied significantly for components of fitness, there was no significant linear or quadratic association of ovariole number and body size with fitness. There was, however, highly significant sex × genotype interaction for fitness among these lines. This special case of genotype × environment interaction for fitness may contribute to the maintenance of genetic variation for fitness in natural populations.
Editor: United States: Society for the Study of Evolution
Idioma: Inglês

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Quantitative genetics of ovariole number in Drosophila melanogaster. I. Segregating variation and fitness

Wayne, M.L. (North Carolina State University, Raleigh, NC.) ; Hackett, J.B ; Mackay, T.F.C

United States: Society for the Study of Evolution

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