Altruism can proliferate through population viscosity despite high random gene flow.

Altruism can proliferate through population viscosity despite high random gene flow.
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DOI:
10.1371/journal.pone.0072043
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Caticha N
Caticha N
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Schonmann RH;Vicente R;Caticha N

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自然选择如何让合作行为得以扩散,一直被视为进化生物学的核心问题。大部分的文献都集中在对个人和线性公共产品游戏之间的相互作用。这种强调导致的结论是,即使是适度的移民水平将构成一个严重的问题,利他主义的传播通过群体结构的人口粘度。在这里,我们挑战这一结论,通过分析进化的框架,允许复杂的群体之间的相互作用和随机迁移。我们的结论是,无论亲属关系如何,没有绿胡子效应,平等地使所有群体成员受益的强利他主义的偶然形式在现实群体规模和迁移水平下罕见时可以传播,这是由于仅由人口粘度引起的基因分类。我们的分析结合了以群体为中心和以基因为中心的观点,允许任意强度的选择,并导致扩展的汉密尔顿规则的传播利他等位基因,适用于广泛的条件下。
The ways in which natural selection can allow the proliferation of cooperative behavior have long been seen as a central problem in evolutionary biology. Most of the literature has focused on interactions between pairs of individuals and on linear public goods games. This emphasis has led to the conclusion that even modest levels of migration would pose a serious problem to the spread of altruism through population viscosity in group structured populations. Here we challenge this conclusion, by analyzing evolution in a framework which allows for complex group interactions and random migration among groups. We conclude that contingent forms of strong altruism that benefits equally all group members, regardless of kinship and without greenbeard effects, can spread when rare under realistic group sizes and levels of migration, due to the assortment of genes resulting only from population viscosity. Our analysis combines group-centric and gene-centric perspectives, allows for arbitrary strength of selection, and leads to extensions of Hamilton’s rule for the spread of altruistic alleles, applicable under broad conditions.
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