Wolbachia-induced unidirectional cytoplasmic incompatibility and the stability of infection polymorphism in parapatric host populations
Wolbachia-induced unidirectional cytoplasmic incompatibility and the stability of infection polymorphism in parapatric host populations
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DOI：
10.1111/j.1420-9101.2006.01252.x
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发表时间：
2007-03-01
影响因子：
2.1
通讯作者：
Telschow, A.
中科院分区：
文献类型：
--
作者：
Flor, M.;Hammerstein, P.;Telschow, A.
沃尔巴克氏体是广泛存在于节肢动物中的细胞内母系遗传细菌，通常会诱导感染的雄性和未感染的雌性宿主之间的生殖不相容性，称为单向细胞质不相容性（CI）。如果感染和未感染的人群发生parapatrically，CI作为一个后合子隔离屏障。我们调查的稳定性，这样的感染多态性的数学模型与两个人口迁移。我们确定了临界迁移率，低于该速率，感染和未感染人群可以共存。给出了大陆-岛屿模型临界迁移率的解析解。这些作为更一般的双向迁移模型的较低估计。临界迁移率是积极的，如果沃尔巴克氏体感染的女性宿主的生殖力下降或其传输是不完整的，是最高的中间水平的CI。我们讨论了我们的研究结果与当地的适应沃尔巴克氏体主机，物种形成和害虫防治。
Wolbachia are intracellular, maternally inherited bacteria that are widespread among arthropods and commonly induce a reproductive incompatibility between infected male and uninfected female hosts known as unidirectional cytoplasmic incompatibility (CI). If infected and uninfected populations occur parapatrically, CI acts as a post-zygotic isolation barrier. We investigate the stability of such infection polymorphisms in a mathematical model with two populations linked by migration. We determine critical migration rates below which infected and uninfected populations can coexist. Analytical solutions of the critical migration rate are presented for mainland-island models. These serve as lower estimations for a more general model with two-way migration. The critical migration rate is positive if either Wolbachia causes a fecundity reduction in infected female hosts or its transmission is incomplete, and is highest for intermediate levels of CI. We discuss our results with respect to local adaptations of the Wolbachia host, speciation, and pest control.