Mating system variation in hybrid zones: facilitation, barriers and asymmetries to gene flow
Mating system variation in hybrid zones: facilitation, barriers and asymmetries to gene flow
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DOI：
10.1111/nph.16180
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发表时间：
2019-11-01
期刊：
影响因子：
9.4
通讯作者：
Field, David L.
中科院分区：
文献类型：
--
作者：
Pickup, Melinda;Brandvain, Yaniv;Field, David L.
植物交配系统在构建物种内和物种间的遗传变异中起着关键作用。在杂交区，杂交的结果和动态通常被解释为基因流动和选择之间的平衡。然而，交配系统可以引入改变这些期望的选择力;基因流动的水平和方向的不同结果取决于异交的变化以及物种对的交配系统是否相同或不同。本文对41个植物科的133个种对的杂交情况进行了调查，并研究了杂交模式如何随交配系统而变化。我们研究如果混合区模式，基因流的水平，基因流的不对称性和生殖隔离障碍的频率变化有关的交配系统/S的物种对。我们结合联合收割机的模拟模型和文献中的例子来解决两个一般性的主题：（1）基因渗入和生殖系统进化之间的双向相互作用，以及（2）交配系统如何促进或限制种间基因流动。我们的结论是，研究交配系统与杂交提供了独特的机会，了解分歧和生殖隔离的过程。
Plant mating systems play a key role in structuring genetic variation both within and between species. In hybrid zones, the outcomes and dynamics of hybridization are usually interpreted as the balance between gene flow and selection against hybrids. Yet, mating systems can introduce selective forces that alter these expectations; with diverse outcomes for the level and direction of gene flow depending on variation in outcrossing and whether the mating systems of the species pair are the same or divergent. We present a survey of hybridization in 133 species pairs from 41 plant families and examine how patterns of hybridization vary with mating system. We examine if hybrid zone mode, level of gene flow, asymmetries in gene flow and the frequency of reproductive isolating barriers vary in relation to mating system/s of the species pair. We combine these results with a simulation model and examples from the literature to address two general themes: (1) the two-way interaction between introgression and the evolution of reproductive systems, and (2) how mating system can facilitate or restrict interspecific gene flow. We conclude that examining mating system with hybridization provides unique opportunities to understand divergence and the processes underlying reproductive isolation.