Spatial Heterogeneity and the Evolution of Sex in Diploids
Spatial Heterogeneity and the Evolution of Sex in Diploids
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DOI：
10.1086/599082
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发表时间：
2009-07-01
影响因子：
2.9
通讯作者：
Agrawal, Aneil F.
中科院分区：
文献类型：
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作者：
Agrawal, Aneil F.
关于性进化的许多理论工作都集中在重组的影响上。在二倍体中，分离也发生在有性生殖过程中。分离破坏了一些不受重组影响的遗传联系，从而影响了性的进化，这在研究以重组代替性的进化时是不明显的。在这里，我研究了经历空间异质选择的二倍体的性别进化。如果不同的选择导致了遗传分化，那么迁移可能是一种强大的力量，产生了可能不受选择青睐的遗传关联。打破这些联系可以产生对性的优势。通过检查性别和重组的修饰语，该模型可以直接比较作用于这些相关但不同的过程的力，从而阐明隔离的作用。该模型还包括近亲繁殖，这已被证明对分离和重组都很重要。我发现近亲繁殖通过隔离而不是重组来影响性别的进化。并对实证实验提出了几点建议。
Much of the theoretical work on the evolution of sex has focused on the effects of recombination. In diploids, segregation also occurs during sexual reproduction. Segregation breaks down some types of genetic associations that are not affected by recombination and thus influences the evolution of sex in ways that are not apparent from studying the evolution of recombination as a surrogate for sex. Here I examine the evolution of sex in diploids experiencing spatially heterogeneous selection. If divergent selection causes genetic differentiation, then migration can be a powerful force generating genetic associations that may not be favored by selection. An advantage to sex can arise from breaking down these associations. By examining modifiers of both sex and recombination, the model allows for a direct comparison of the forces acting on these related but different processes, illuminating the role of segregation. The model also includes inbreeding, which has been shown to be important for both segregation and recombination. I find that inbreeding affects the evolution of sex through segregation, not recombination. Several suggestions for empirical experiments are given.