ISLAND MODELS FOR TAKEOVER BY A SOCIAL TRAIT FACING A FREQUENCY-DEPENDENT SELECTION BARRIER IN A MENDELIAN POPULATION
ISLAND MODELS FOR TAKEOVER BY A SOCIAL TRAIT FACING A FREQUENCY-DEPENDENT SELECTION BARRIER IN A MENDELIAN POPULATION
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DOI：
10.1073/pnas.71.5.2103
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发表时间：
1974-01-01
影响因子：
11.1
通讯作者：
BOORMAN, SA
中科院分区：
文献类型：
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作者：
BOORMAN, SA
提出了一个选择控制无关同种间合作行为的孟德尔性状的群体遗传模型。在简单而稳健的假设下，这样的特征将在频率依赖的基础上被选择，在对该特征的有利选择发生之前，必须超过该社会特征的临界阈值频率（β2crit）。这一阈值的存在引发了一个基本的进化问题，即如何从一个非社会状态（β 0）进化到一个社会状态（β 1）。这种演变的正式模型，提出了依赖于随机混合（人口粘度）的障碍。关键的事实是，在选择和迁移的共同作用下，社会特征最初的局部集中可能会扩散，最终接管更大的物种种群。有人认为，这个模型是第一个正式的模型，以捕捉赖特的想法关于群体选择的利他主义特质在岛屿结构的人口。
A population genetic model is presented for selection of a Mendelian trait controlling for cooperative behavior between unrelated conspecifics. Under simple and robust assumptions, such a trait will be selected on a frequency-dependent basis, with a critical threshold frequency (β2crit) of the social trait which must be exceeded before favorable selection of this trait can occur. Existence of this threshold gives rise to a basic evolutionary problem as to how evolution from an asocial state (β ≅ 0) to a social state (β ≅ 1) can take place. A formal model of this evolution is proposed which rests on obstacles to random mixing (population viscosity). The key fact is the possibility that an initial local concentration of the social trait may be able to spread out under the joint effects of selection and migration and eventually take over a much larger species population. It is argued that this model is the first formal model to capture the ideas of Wright concerning group selection of an altruist trait in an island-structured population.