Selection by parasites for clonal diversity and mixed mating
Selection by parasites for clonal diversity and mixed mating
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寄生虫选择克隆多样性和混合交配
DOI：
10.1007/978-94-009-0077-6_1
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
R. S. Howard
中科院分区：
文献类型：
--
作者：
C. Lively;R. S. Howard
在理论上，与寄生虫的共同进化相互作用可以选择交叉受精，即使通过单亲繁殖获得了双重优势。交叉受精的怀疑优势来自于产生基因稀有的后代，预计这些后代更有可能通过共同进化的敌人逃脱感染。在目前的研究中，我们考虑了寄生虫对雌雄异株种群中孤雌生殖突变体的影响。计算机模拟表明，孤雌生殖的重复突变可能导致具有不同抗性基因的克隆的积累，并且一组适度多样化的克隆可能竞争性地排除祖先的有性亚群。模拟还表明，当有害突变率合理时，Muller棘轮结合与寄生虫的共同进化相互作用可以导致交叉受精的进化稳定性。此外，我们还考虑了寄生虫对两性种群中单亲生殖进化的影响。策略模型表明，寄生虫和近亲繁殖抑制可以相互作用，选择进化上稳定的繁殖策略，包括自交和异交后代的混合。
On theoretical grounds, coevolutionary interactions with parasites can select for cross-fertilization, even when there is a twofold advantage gained by reproducing through uniparental means. The suspected advantage of cross-fertilization stems from the production of genetically rare offspring, which are expected to be more likely to escape infection by coevolving enemies. In the present study, we consider the effects that parasites have on parthenogenetic mutants in obligately sexual, dioecious populations. Computer simulations show that repeated mutation to parthenogenesis can lead to the accumulation of clones with different resistance genotypes, and that a moderately diverse set of clones could competitively exclude the ancestral sexual subpopulation. The simulations also show that, when there are reasonable rates of deleterious mutation, Muller’s ratchet combined with coevolutionary interactions with parasites can lead to the evolutionary stability of cross-fertilization. In addition, we consider the effects that parasites can have on the evolution of uniparental reproduction in cosexual populations. Strategy models show that parasites and inbreeding depression could interact to select for evolutionarily stable reproductive strategies that involve mixtures of selfed and outcrossed progeny.