Variation in sperm displacement and its association with accessory gland protein loci in Drosophila melanogaster.
A screen for variation in sperm displacement among 152 lines of Drosophilia melanogaster that were made homozygous for second and/or third chromosomes recovered from natural populations found no correlation between the able to displace resident sperm and the ability to resist being displaced by subsequent sperm.
Female x male interactions in Drosophila sperm competition.
The success of a particular male's sperm was found to depend on the genotype of the female with which he mates, providing evidence for an interaction with profound evolutionary consequences.
Regions of stable equilibria for models of differential selection in the two sexes under random mating.
The principle that the average degree of dominance controls equilibrium behavior is extended to models allowing directional selection in one sex with overdominance in the other sex, by showing that polymorphism is maintained if and only if the average fitness in heterozygotes exceeds one.
Laboratory estimates of heritabilities and genetic correlations in nature.
The estimated lower bounds on herit abilities can sometimes be used to demonstrate a significant genetic correlation between two traits in nature, if their genetic and phenotypic correlations in nature have the same sign, and if sample sizes are large, and heritabilities and phenotypesic and genetic correlations are high.
Competition Among Immatures Affects Their Adult Fertility: Population Dynamics
The widespread occurrence of this delay effect of competition among immatures on their subsequent fertility is documented, justifying the study of some of the theoretical consequences of equation (1), which describes the one-to-two mapping of the number of adults from one generation to the next.
Antagonistic Pleiotropy, Reversal of Dominance, and Genetic Polymorphism
It is concluded that, even though trade-offs in Fitness components may be common, antagonistic pleiotropy probably plays a limited role in explaining the persistence of genetic variation in fitness components.
Long-Distance Migration of Drosophila
- J. Coyne, I. Boussy, T. Prout, S. Bryant, Js Jones, J. A. Moore
- BiologyAmerican Naturalist
- 1 April 1982
Two release experiments in Death Valley, California, demonstrate Drosophila will in fact leave oases and venture into the surrounding desert, and also travel from one oasis to another across many kilometers of desert, which support the hypothesis that Drosophile migration may be more extensive than previously supposed.
Frequency-Dependent Selection in Randomly Mating Populations
It is concluded that only survival values of the genotypes for several population compositions would be sufficient to discriminate between certain models, and thus provides a basis for determining the appropriate model.
SPERM DISPLACEMENT WITHOUT SPERM TRANSFER IN DROSOPHILA MELANOGASTER
It is shown that when Drosophila melanogaster females are mated twice, the semen of the second male causes a reduction of the effective number of resident sperm from the previous mating, indicating that a sperm‐incapacitation process plays a role in the well‐documented phenomenon of sperm displacement (last‐male advantage) in this species.
The population genetics of sperm displacement.
The experimental work involved the use of three genetic marker stocks in double and triple matings and indicated stable equilibria if (1) there is heterosis, and (2) there are certain nontransitive relationships in displacing ability among the different kinds of double matings.