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The maintenance of females among hermaphrodites the importance of nuclear cytoplasmic interactions

, : The maintenance of females among hermaphrodites the importance of nuclear cytoplasmic interactions. Heredity 57(3): 325-330

Female plants of Thymus vulgaris produce more seeds than hermaphrodites but their frequency in a population is not determined by the magnitude of this advantage. Instead, the proximity of the population of equilibrium determines the frequency of females: the higher the frequency of females. This trend is due to founder effects occurring among cytoplasmic and nuclear genes determining male sterility. A review of literature supports the conclusions that male sterility in higher plants has a nuclear-cytoplasmic inheritance, that the frequency of female plants is often not at equilibrium, and that populations far from equilibrium (young and/or disturbed) have higher frequencies of females.

Accession: 006712985

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Related references

Jolls C.L., 1984: The maintenance of hermaphrodites and females in populations of silene vulgaris caryophyllaceae. American Journal of Botany 71(5 PART 2): 81

Gregorius, H.R.; Ross, M.D.; Gillet, E., 1982: Selection in plant populations of effectively infinite size 3. the maintenance of females among hermaphrodites for a bi allelic model. An allele or genotype is called protected if for all initial genotype frequencies positive it cannot be lost or does not remain at very low frequencies indefinitely. An analysis of protectedness as made for gynodioecious populations with both fema...

Fry, J.D., 1989: Nuclear-nuclear and nuclear-cytoplasmic interactions contribute to the reproductive incompatibility between two strains of the twospotted spider mite. Two strains of Tetranychus urticae, one bearing the marker mutation 'white-eye', were crossed in the laboratory at 22-27 degrees C. F1 females from both reciprocal crosses laid a considerable proportion of eggs that failed to hatch. Also...

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