Sexually antagonistic polymorphism in simultaneous hermaphrodites.
Sexually antagonistic polymorphism in simultaneous hermaphrodites.
复制标题
DOI：
10.1111/evo.12536
复制
发表时间：
2014-12
期刊：
影响因子：
--
通讯作者：
Connallon T
中科院分区：
文献类型：
--
作者：
Jordan CY;Connallon T
在雌雄同体，多效性的遗传权衡之间的女性和男性生殖功能，可能会导致性拮抗（SA）的选择，其中个别等位基因有冲突的健身效果对每个性功能。虽然存在广泛的理论SA选择雌雄异株的物种，这些结果还没有推广到雌雄同体。我们开发的群体遗传模型的SA选择同时雌雄同体，并评估优势，选择对每个性别功能，自受精，和人口规模的影响，对多态性的维护。在专性异交下，雌雄同体模型的预测与雌雄异株群体的预测完全一致。雌雄同体的自花受精与雌雄异株理论产生了三点分歧。首先，稳定的多态性的机会急剧下降，并成为不太敏感的优势增加自交。其次，自交通过雄性与雌性生殖功能引入选择的相对重要性的不对称性，扩大了有利于雌性有益等位基因进化入侵的参数空间，并限制了雄性有益等位基因的入侵标准。最后，与无条件有益等位基因的模型相反，自交降低了入侵SA等位基因的遗传搭便车效应，因此应该降低SA多态性的这些群体遗传信号。我们讨论的影响SA选择雌雄同体，包括其潜在的作用，在进化中的“自交综合征”。
In hermaphrodites, pleiotropic genetic tradeoffs between female and male reproductive functions can lead to sexually antagonistic (SA) selection, where individual alleles have conflicting fitness effects on each sex function. While an extensive theory of SA selection exists for dioecious species, these results have not been generalized to hermaphrodites. We develop population genetic models of SA selection in simultaneous hermaphrodites, and evaluate effects of dominance, selection on each sex function, self-fertilization, and population size, on the maintenance of polymorphism. Under obligate outcrossing, hermaphrodite model predictions converge exactly with those of dioecious populations. Self-fertilization in hermaphrodites generates three points of divergence with dioecious theory. First, opportunities for stable polymorphism decline sharply and become less sensitive to dominance with increased selfing. Second, selfing introduces an asymmetry in the relative importance of selection through male versus female reproductive functions, expands the parameter space favorable for the evolutionary invasion of female-beneficial alleles, and restricts invasion criteria for male-beneficial alleles. Finally, contrary to models of unconditionally beneficial alleles, selfing decreases genetic hitchhiking effects of invading SA alleles, and should therefore decrease these population genetic signals of SA polymorphisms. We discuss implications of SA selection in hermaphrodites, including its potential role in the evolution of “selfing syndromes”.
登录
查看更多内容
影响因子：
3.8
作者：
Barrett, SCH
通讯作者：
Barrett, SCH
影响因子：
3.3
作者：
Connallon, Tim;Clark, Andrew G.
通讯作者：
Clark, Andrew G.
影响因子：
11.4
作者：
Asthana, S;Schmidt, S;Sunyaev, S
通讯作者：
Sunyaev, S
影响因子：
3.3
作者：
Berger, David;Grieshop, Karl;Arnqvist, Goran
通讯作者：
Arnqvist, Goran
影响因子：
3.3
作者：
Connallon, Tim;Clark, Andrew G.
通讯作者：
Clark, Andrew G.