Fitness and its components in Drosophila melanogaster.
Fitness and its components in Drosophila melanogaster were estimated under the homozygous condition. All of these parameters, except for egg-to-adult viability and female fecundity, were measured under interspecific competition with D. hydei. The following results were obtained: (1) Significant genetic variation was detected in fitness, productivity, adult viability, total egg-to-adult viability and female fecundity. (2) Significant correlation was obtained between fitness and productivity (rp = 0.792 for phenotypic correlation, rg = 0.945 for genotypic correlation), between fitness and total egg-to-adult viability (rp = 0.355, rg = 0.395), and between fitness and female fecundity (rp = 0.451, rg = 0.511). (3) There was no significant correlation between total egg-to-adult viability and fecundity (rp = -0.046). The biological implications of the interrelationship between fitness and its components are discussed.
Tanaka
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Department of Biology, Faculty of Science, Kyushu University, Fukuoka.
Yamazaki
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D000818:Animals; D004331:Drosophila melanogaster / Q000235:genetics* / Q000502:physiology; D005260:Female; D005298:Fertility; D014644:Genetic Variation; D005838:Genotype; D006720:Homozygote; D008297:Male; D010641:Phenotype; D015996:Survival Rate