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Relatedness in trait group models of social evolution

机译：社会进化特征群模型的相关性

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Genetic relatedness is a central concept in the study of social evolution. Though originally defined in terms of genealogy, the modern version of relatedness accommodates genetic similarity of any origin. This paper examines relatedness in group structured modes, in which a trait affects the fitness of all group members. Such traits can be divided into two types, based on whether their group fitness effects encompass all group members including the actor ("whole-group traits"), or only group members other than the actor ("other-only traits"). Both trait types are common in nature as well as in theoretical models, but they have rarely been distinguished clearly. The average relatedness of recipients to actors differs for the two trait types within the same population and even the same individual, leading to different selection pressures and evolutionary outcomes. Total relatedness in group-structured models can be partitioned into two components: structural relatedness due to the size and number of groups in the population, and assortative relatedness due to the distribution of genotypes among groups. Each component differs for whole-group vs. other-only traits, both in terms of their values and the factors that influence them. Some key differences include: positive relatedness requires positive assortment for other-only but not for whole-group traits; negative relatedness is possible for other-only but not whole-group traits; relatedness depends on average group size for whole-group but not other-only traits, and non-random assortment into groups affects relatedness more strongly for other-only than whole-group traits. Recognizing the distinction between these trait types resolves some apparent contradictions in the literature, and clarifies the limits of some previous results. (C) 2000 Academic Press. [References: 88]
机译：遗传相关性是研究社会进化的核心概念。尽管最初是根据家谱学定义的，但是现代的关联性可以适应任何起源的遗传相似性。本文研究了群体结构模式下的关联性，其中特质影响所有群体成员的适应性。根据这些特征可以分为两种类型，这取决于它们的群体适应性效果是覆盖包括演员在内的所有群体成员（“整个群体特征”），还是仅包含除了参与者之外的其他群体成员（“其他个体特征”）。两种特征类型在自然界和理论模型中都是常见的，但很少能清楚地区分。在同一人群甚至同一个人中，两种特征类型的接受者与演员的平均相关性不同，从而导致不同的选择压力和进化结果。群体结构模型中的总体相关性可以分为两个部分：由于群体中群体的数量和数量而导致的结构相关性，以及由于基因型在群体中的分布而引起的分类相关性。整个组和其他组的每个特征在其价值和影响它们的因素方面都不同。一些主要差异包括：正相关性要求对其他特征而不是整个群体特征进行正向分类;负相关性对于仅其他特征而不是整个群体特征是可能的;关联性取决于整个群体的平均群体大小，而不取决于仅其他群体的特性，并且非随机分类对群体的影响比完全群体性状对关联性的影响更大。认识到这些特征类型之间的区别解决了文献中的一些明显矛盾，并阐明了某些先前结果的局限性。 （C）2000学术出版社。 [参考：88]

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