UNIFICATION OF METHODS FOR ESTIMATING THE STRENGTH OF REPRODUCTIVE ISOLATION
UNIFICATION OF METHODS FOR ESTIMATING THE STRENGTH OF REPRODUCTIVE ISOLATION
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DOI：
10.1111/evo.12362
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发表时间：
2014-05-01
期刊：
影响因子：
3.3
通讯作者：
Chen, Grace F.
中科院分区：
文献类型：
--
作者：
Sobel, James M.;Chen, Grace F.
理解生殖隔离的进化就相当于描述物种的起源。因此，进化生物学的一个主要目标是确定哪些生殖障碍对这一过程最重要。为了实现这一目标，必须以同等的方式比较多种形式的孤立的强度。然而，人们使用了多种方法来估计屏障强度，分为几个数学上截然不同的类别。这项研究提供了一种计算隔离的统一方法，该方法在一个简单的线性框架内将分类群经历的基因流的数量与随机预期联系起来。与以前的方法相比，这种方法有三个明显的优点：(1)它与基因流动直接相关；(2)它是对称的，因此在正负范围内的测量都是可比较的；(3)它在生殖隔离的大类之间是等价的，允许进行适当的比较。这种线性配方可以调整，以用于所有形式的隔离，并可以适应对同种和异种基因流动的零期望不同的情况。此外，该框架还可以用来计算总的生殖隔离和个体屏障的相对贡献。
Understanding the evolution of reproductive isolation is tantamount to describing the origin of species. Therefore, a primary goal in evolutionary biology is to identify which reproductive barriers are most important to the process. To achieve this goal, the strength of multiple forms of isolation must be compared in an equivalent manner. However, a diversity of methods has been used to estimate barrier strength, falling into several mathematically distinct categories. This study provides a unified method for calculating isolation that relates the amount of gene flow experienced by taxa to random expectations in a simple linear framework. This approach has three distinct advantages over previous methods: (1) it is directly related to gene flow, (2) it is symmetrical, such that measures in both the positive and negative range are comparable, and (3) it is equivalent between broad categories of reproductive isolation, allowing for appropriate comparisons. This linear formulation can be adjusted for use in all forms of isolation, and can accommodate cases in which null expectations for con- and heterospecific gene flow differ. Additionally, this framework can be used to calculate total reproductive isolation and the relative contributions of individual barriers.