Response to selection in partially self-fertilizing populations. I. Selection on a single trait
Response to selection in partially self-fertilizing populations. I. Selection on a single trait
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DOI：
10.1111/j.1558-5646.1999.tb03770.x
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发表时间：
1999-04-01
期刊：
影响因子：
3.3
通讯作者：
Kelly, JK
中科院分区：
文献类型：
--
作者：
Kelly, JK
自交受精是植物中一种常见的生殖形式，对数量性状进化具有重要意义。在这里，我提出了一个可以适应任何水平的自花受精的数量性状选择模型。“结构线性模型”（SLM）预测平均表型的进化是三个不同数量的函数：平均加性遗传值、定向显性和平均近交系数。截断选择的随机模拟证明了SLM在预测数量性状在整个自交率范围内的均值和方差变化方面的准确性。它们还说明了选择和交配系统之间复杂的相互作用如何决定近亲繁殖系数的种群分布以及连锁不平衡的数量。由连锁不平衡引起的遗传变异的变化，通常被称为“布尔默效应”，被自交极大地放大了。这使得自恋率和对选择的反应之间的关系变得复杂。与随机交配理论一样，SLM的参数可以从表型数据中估计出来。
Self-fertilization is a common form of reproduction in plants and it has important implications for quantitative trait evolution. Here, I present a model of selection on quantitative traits that can accommodate any level-of self-fertilization. The "structured linear model" (SLM) predicts the evolution of the mean phenotype as a function of three distinct quantities: the mean additive genetic value, the directional dominance, and the mean inbreeding coefficient. Stochastic simulations of truncation selection demonstrate the accuracy of the SLM in predicting changes in the mean and variance of a quantitative trait over the full range of selfing rates. They also illustrate how complex interactions between selection and mating system determine the population distribution of inbreeding coefficients and also the amount of linkage disequilibrium. Changes in the genetic variance due to linkage disequilibria, which are commonly referred to as the "Bulmer effect," are greatly magnified by selfing. This complicates the relationship between selfing rate and response to selection. Like the random mating theory, the parameters of the SLM can be estimated from phenotypic data.