Genetic Elements Promote Polyandry in a
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منابع مشابه
Selfish genetic elements promote polyandry in a fly.
It is unknown why females mate with multiple males when mating is frequently costly and a single copulation often provides enough sperm to fertilize all a female's eggs. One possibility is that remating increases the fitness of offspring, because fertilization success is biased toward the sperm of high-fitness males. We show that female Drosophila pseudoobscura evolved increased remating rates ...
متن کاملThe dynamic relationship between polyandry and selfish genetic elements.
Selfish genetic elements (SGEs) are ubiquitous in eukaryotes and bacteria, and make up a large part of the genome. They frequently target sperm to increase their transmission success, but these manipulations are often associated with reduced male fertility. Low fertility of SGE-carrying males is suggested to promote polyandry as a female strategy to bias paternity against male carriers. Support...
متن کاملSexual Selection: Selfish Genetic Element Encourages Polyandry
Selfish genetic elements are ubiquitous and may impact drastically on eukaryote reproduction and evolution. A recent experimental evolution study shows that such elements could also provide an explanation for polyandry.
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BACKGROUND Mothers that mate with multiple males often produce higher quality offspring than mothers that mate with a single male. By engaging in polyandry, mothers may increase their chances of mating with a compatible male or promote sperm competition -- both of which act to increase maternal fitness via the biasing of the paternity of offspring. Surprisingly, mating with multiple males, can ...
متن کاملDetrimental effects of an autosomal selfish genetic element on sperm competitiveness in house mice.
Female multiple mating (polyandry) is widespread across many animal taxa and indirect genetic benefits are a major evolutionary force favouring polyandry. An incentive for polyandry arises when multiple mating leads to sperm competition that disadvantages sperm from genetically inferior mates. A reduction in genetic quality is associated with costly selfish genetic elements (SGEs), and studies ...
متن کاملThe incidence and selection of multiple mating in plants.
Mating with more than one pollen donor, or polyandry, is common in land plants. In flowering plants, polyandry occurs when the pollen from different potential sires is distributed among the fruits of a single individual, or when pollen from more than one donor is deposited on the same stigma. Because polyandry typically leads to multiple paternity among or within fruits, it can be indirectly in...
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تاریخ انتشار 2008