The Genetic Structure of Natural Populations of Drosophila Melanogaster. Xxiv. Effects of Hybrid Dysgenesis on the Components of Genetic Variance of Viability
AUTOR(ES)
Suh, D. S.
RESUMO
Eight hundred second chromosomes were extracted from the Ishigakijima population, one of the southernmost populations of Drosophila melanogaster in Japan. Half of them were extracted in Native cytoplasm (P-type), and half in Foreign cytoplasm (M-type). Various population-genetic parameters, including the frequency of lethal-carrying second chromosomes (Q = 0.235 for the Native; 0.218 for the Foreign), the allelism rate of lethal second chromosome (I(c) = 0.0217 for the Native; 0.0134 for the Foreign), the homozygous detrimental and lethal loads (D = 0.179 for the Native; 0.270 for the Foreign; L = 0.262 for the Native; 0.240 for the Foreign), the average degree of dominance of mildly deleterious mutations (h(E) = 0.244 for the Native; 0.208 for the Foreign), and the components of genetic variance for viability [additive (σ(A)(2)) and dominance (σ(D)(2))](σ(A)(2) = 0.0187 for the Native; 0.0172 for the Foreign; σ(D)(2) = 0.0005 for the Native; 0.0009 for the Foreign) were estimated. The data indicate that D was significantly larger and h(E) was significantly smaller in the Foreign cytoplasm. However, the estimates of additive and dominance variances were not significantly different between the two cytoplasms. The additive genetic variance for viability in the Ishigakijima population was greater than expected on the basis of mutation-selection balance confirming previous studies on papers of D. melanogaster in warm climates.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1204382Documentos Relacionados
- The Genetic Structure of Natural Populations of DROSOPHILA MELANOGASTER. Xvi. Excess of Additive Genetic Variance of Viability
- The Genetic Structure of Natural Populations of DROSOPHILA MELANOGASTER. X. Developmental Time and Viability
- The Genetic Structure of Natural Populations of DROSOPHILA MELANOGASTER. IV. Heterozygous Effects of Radiation-Induced Mutations on Viability in Various Genetic Backgrounds
- The Genetic Structure of Natural Populations of DROSOPHILA MELANOGASTER. Xix. Genotype-Environment Interaction in Viability
- The Genetic Structure of Natural Populations of DROSOPHILA MELANOGASTER. VIII. Natural Selection on the Degree of Dominance of Viability Polygenes