GROUP SELECTION FOR A POLYGENIC BEHAVIORAL TRAIT - ESTIMATING THE DEGREE OF POPULATION SUBDIVISION
GROUP SELECTION FOR A POLYGENIC BEHAVIORAL TRAIT - ESTIMATING THE DEGREE OF POPULATION SUBDIVISION
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DOI：
10.1073/pnas.81.19.6073
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发表时间：
1984-01-01
期刊：
影响因子：
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通讯作者：
AOKI, K
中科院分区：
文献类型：
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作者：
CROW, JF;AOKI, K
为了评估群体细分的程度，以及群体选择可能在多大程度上有利于利他性状，一个适当的衡量标准是内‘’S GST，由(F0-.hivin.F)/(1-.hivin.F)定义。F0是来自同一组的两个等位基因在状态上相同的概率，而F是从整个群体中随机抽取的两个等位基因的概率。这些概率可以从分子多态来评估。商品及服务税具有许多特性，这使得它对实证研究很有用。当突变率相对于迁移率和群体大小的倒数较小时，GST主要取决于每代迁徙的绝对数量，并迅速接近平衡，与等位基因数量无关。岛上移民和踏脚石模型的相对同质化效应并不像预期的那样不同；从其余人口中随机选择一个移民的效果只是邻近群体的1-2倍，只有在有1000个或更多群体时才明显超过2个。使用分子数据来估计种群细分的程度，可能允许对利他行为的程度进行可检验的预测。
For assessing the degree of population subdivision, and therefore the extent to which group selection might favor an altruistic trait, an appropriate measure is Nei''s GST, defined by (F0 - .hivin.F)/(1 - .hivin.F). F0 is the probability the 2 alleles drawn from the same group are identical in state and .hivin.F is the probability for 2 alleles drawn at random from the entire population. These probabilities can be assessed from molecular polymorphisms. GST has a number of properties that make it useful for empirical studies. When the mutation rate is small relative to the migration rate and the reciprocal of the group size, GST depends mainly on the absolute number of migrants per generation, moves rapidly to near equilibrium, and is independent of the number of alleles. The relative homogenizing effect of migration in the island and stepping-stone models is not as different as might be expected; one immigrant chosen randomly from the rest of the population is only 1-2 times as effective as one from a neighboring group, appreciably exceeding 2 only when there are 1000 or more groups. The use of molecular data to estimate the degree of population subdivision may permit testable predictions of the extent of altruistic hehavior.