Prout T, Bundgaard J
Genetics. 1977 Jan;85(1):95-124. doi: 10.1093/genetics/85.1.95.
This article reports the results of some sperm displacement experiments, as well as the results of a theoretical study of selection arising from genetic differences in displacing ability. The experimental work involved the use of three genetic marker stocks in double and triple matings. The speed of displacement following the matings was determined by scoring the progeny of each female daily. There were clear differences between strains in their displacing ability. It is shown how new information concerning the displacement process results when three markers are used; however, no new light is shed by these experiments on the mechanism of displacement. The theoretical study of selection resulting from displacement uses a one-locus, two-allele model in which three diploid male genotypes confer different displacing abilities. The results indicate stable equilibria if (1) there is heterosis, and (2) there are certain nontransitive relationships in displacing ability among the different kinds of double matings. Some evolutionary consequences are discussed in which sperm displacement is regarded as a form of sexual selection.
本文报告了一些精子置换实验的结果，以及对因置换能力的遗传差异而产生的选择进行理论研究的结果。实验工作涉及在双交配和三交配中使用三种遗传标记品系。交配后置换的速度通过每天对每只雌性交配后代进行评分来确定。不同品系在置换能力上存在明显差异。展示了使用三种标记时如何产生有关置换过程的新信息；然而，这些实验并未揭示置换机制的新线索。对由置换产生的选择进行的理论研究使用了一个单基因座、双等位基因模型，其中三种二倍体雄性基因型具有不同的置换能力。结果表明，如果（1）存在杂种优势，且（2）不同类型的双交配在置换能力上存在某些非传递关系，则会出现稳定平衡。讨论了一些进化后果，其中精子置换被视为一种性选择形式。
