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Sperm natural population drosophila

The prevalence of sexual conflict in nature, as well as the supposedly arbitrary direction of the resulting coevolutionary trajectories, suggests that it may be an important driver of phenotypic divergence even in a constant environment. However, natural selection has long been central to the operation of sexual conflict within populations and may therefore constrain or otherwise direct divergence among populations. Ecological context may therefore matter with respect to the diversification of traits involved in sexual conflict, and if natural selection is sufficiently strong, such traits may evolve in correlation with environment, generating a pattern of ecologically-dependent parallel evolution. In this study we assess among-population divergence both within and between environments for several traits involved in sexual conflict. Using eight replicate populations of Drosophila melanogaster from a long-term evolution experiment, we measured remating rates and subsequent offspring production of females when housed with two separate males in sequence. We found no evidence of any variation in male reproductive traits offense or defense.
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Female genotypes affect sperm displacement in Drosophila.

Sperm natural population drosophila
Sperm natural population drosophila
Sperm natural population drosophila
Sperm natural population drosophila
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Multiple mating and sperm displacement in a natural population of Drosophila melanogaster.

Multiple mating by females establishes the opportunity for postcopulatory sexual selection favoring males whose sperm is preferentially employed in fertilizations. Here we use natural variation in a wild population of Drosophila melanogaster to investigate the genetic basis of sperm competitive ability. Permutation tests were applied to quantify the statistical significance of associations between genotype and phenotype. Nine significant associations were identified between polymorphisms in the male reproductive genes and sperm competitive ability and 13 were identified between genotype and transcript abundance, but no significant associations were found between transcript abundance and sperm competitive ability. The latter case is consistent with antagonistic pleiotropy and may serve as a mechanism maintaining genetic variation. While the benefits to females are often debated see J ennions and P etrie ; B irkhead and P izzari , polyandry provides the opportunity for postcopulatory sexual selection to influence patterns of reproductive success.
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Multiple mating and sperm displacement in a natural population of Drosophila melanogaster.

Skip to search form Skip to main content. A population model with multiple mating and sperm displacement is examined theoretically. A formula for the effective population size is derived under this model. Multiple mating increases the effective population size relative to single mating. View on Springer.
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Theoretical and Applied Genetics. Mother-offspring data for alcohol dehydrogenase genotypes of a vineyard cellar population of D. A population model with multiple mating and sperm displacement is examined theoretically. A formula for the effective population size is derived under this model.
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