Sperm dumping as a defense against meiotic drive
نویسندگان
چکیده
Sperm from Drosophila simulans that carry a sex-ratio distorter is preferentially lost from females' sperm-storage organs. This suggests that sperm dumping is a major factor affecting sperm competition in this species, and may have evolved in response to sex-ratio distorters.
منابع مشابه
Sperm should evolve to make female meiosis fair.
Genomic conflicts arise when an allele gains an evolutionary advantage at a cost to organismal fitness. Oögenesis is inherently susceptible to such conflicts because alleles compete for inclusion into the egg. Alleles that distort meiosis in their favor (i.e., meiotic drivers) often decrease organismal fitness, and therefore indirectly favor the evolution of mechanisms to suppress meiotic drive...
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Genomic conflicts arise when an allele gains an evolutionary advantage at 7 a cost to organismal fitness. Oögenesis is inherently susceptible to such conflicts because 8 alleles compete for inclusion into the egg. Alleles that distort meiosis in their favor (i.e. 9 meiotic drivers) often decrease organismal fitness, and therefore indirectly favor the evolu10 tion of mechanisms to suppress meiot...
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Meiotic drive results when sperm carrying a driving chromosome preferentially survive development. Meiotic drive should therefore influence sperm competition because drive males produce fewer sperm than non-drive males. Whether meiotic drive also influences the competitive ability of sperm after ejaculation is unknown. Here we report the results from reciprocal crosses that are designed for est...
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Segregation distorters located on sex chromosomes are predicted to sweep to fixation and cause extinction via a shortage of one sex, but in nature they are often found at low, stable frequencies. One potential resolution to this longstanding puzzle involves female multiple mating (polyandry). Because many meiotic drivers severely reduce the sperm competitive ability of their male carriers, fema...
متن کاملSperm survival in female stalk-eyed flies depends on seminal fluid and meiotic drive.
Sperm competition is common in many insect species; however, the mechanisms underlying differences in sperm precedence are not well understood. In the stalk-eyed fly, Cyrtodiopsis whitei (Diptera, Diopsidae), sperm precedence is influenced by the presence of sex chromosome meiotic drive. When drive-carrying males compete with non-driving males for fertilizations within a female, the number of p...
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ورودعنوان ژورنال:
- Journal of Biology
دوره 8 شماره
صفحات -
تاریخ انتشار 2009