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arXiv 2404.13093q-bio.PE
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N基因模型用于进化博弈

The N-Gene Model for Evolutionary Games

Tyler Clark

AI总结:

本研究提出整合孟德尔遗传与连续策略的N基因进化模型,发现杂合基因下利他行为在成本效益比超过1时即可稳定,优于纯合基因需大于2的条件,为理解利他行为进化提供了新工具。

摘要:

在本研究中,我们开发了一种新颖的进化模型,该模型整合了孟德尔遗传学、连续策略以及多个基因可能对单一表型性状做出贡献的潜力。利他行为的进化,即个体付出代价而使他人受益,仍然是进化生物学中的一个基本问题。尽管以往的模型已经研究了有利于利他行为出现和稳定的条件,但它们常常采用简化假设,例如单基因遗传和离散策略。我们采用改良的独裁者博弈作为进化互动的框架,并探讨了利他行为在各种条件下的稳定性。我们的主要结果表明,当考虑杂合基因时,利他行为可以在成本效益比超过1的情况下进化稳定,即使在种群中利他者的初始频率较低。这一发现与纯合基因的情况形成对比,在纯合基因下,利他行为仅在成本效益比大于2时才稳定。我们方法的通用性使其能够应用于各种进化博弈和互动,为研究社会行为和个性特征的出现与维持提供了有力工具。我们的结果有助于理解利他行为背后的进化机制,并强调了在进化模型中纳入遗传复杂性的重要性。这项工作对社会进化的研究以及复杂行为表型的遗传结构具有启示意义。

英文摘要:

In this study, we develop a novel evolutionary model that incorporates Mendelian genetics, continuous strategies, and the potential for multiple genes to contribute to a single phenotypic trait. The evolution of altruistic behavior, which confers benefits to others at a cost to the individual, remains a fundamental question in evolutionary biology. While previous models have investigated the conditions favoring the emergence and stability of altruism, they have often employed simplifying assumptions, such as single-gene inheritance and discrete strategies. We employ a modified dictator game as the framework for evolutionary interactions and explore the stability of altruistic behavior under various conditions. Our primary result demonstrates that when considering heterozygous genes, altruism can be evolutionarily stable at cost-to-benefit ratios exceeding unity, even with initially low frequencies of altruists in the population. This finding contrasts with the case of homozygous genes, where altruism is only stable at cost-to-benefit ratios greater than 2. The generality of our approach allows for its application to a diverse range of evolutionary games and interactions, providing a powerful tool for investigating the emergence and maintenance of social behaviors and personality traits. Our results contribute to the understanding of the evolutionary mechanisms underlying altruism and underscore the importance of incorporating genetic complexity in evolutionary models. This work has implications for the study of social evolution and the genetic architecture of complex behavioral phenotypes.

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