SELECTION RESPONSE IN TRAITS WITH MATERNAL INHERITANCE
SELECTION RESPONSE IN TRAITS WITH MATERNAL INHERITANCE
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DOI：
10.1017/s0016672300025520
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发表时间：
1990-06-01
影响因子：
1.5
通讯作者：
KIRKPATRICK, M
中科院分区：
文献类型：
--
作者：
LANDE, R;KIRKPATRICK, M
母系遗传是指性状从母亲传给后代的非孟德尔式遗传。尽管它存在于几乎所有的生物体中，并通过各种机制发挥作用，但母体遗传的进化后果尚未得到很好的理解。本文回顾并扩展了一个具有复杂母系效应途径的多数量性状遗传演化模型。早期模型的扩展包括与母亲表型、两性二态性和父亲效应（父亲对后代性状的非孟德尔影响）无关的常见家庭环境效应。我们发现，与简单的孟德尔遗传相比，母系遗传产生的进化动力在质量上有所不同，原因有二：(1)一组性状对选择的反应不仅取决于其加性遗传方差和协方差，还取决于影响它们的母系性状；(2)对选择反应的时间滞后创造了一种进化势头。这些结果对自然种群的进化和驯化物种经济改良的实际应用具有重要意义。我们根据个人优点或个人和家庭优点的结合，推导出选择指数，使人工选择的单代经济改善最大化，或使长期选择计划的渐进改善率最大化。数值例子表明，考虑到母系遗传可以大大提高人工选择的效率。
Maternal inheritance is the non-Mendelian transmission of traits from mothers to their offspring. Despite its presence in virtually all organisms, acting through a variety of mechanisms, the evolutionary consequences of maternal inheritance are not well understood. Here we review and extend a model of the inheritance and evolution of multiple quantitative characters with complex pathways of maternal effects. Extensions of the earlier model include common family environmental effects not associated with maternal phenotype, sexual dimorphism, and paternal effects (non-Mendelian influence of the father on offspring traits). We find that, in contrast to simple Mendelian inheritance, maternal inheritance produces qualitatively different evolutionary dynamics for two reasons: (1) the response to selection on a set of characters depends not only on their additive genetic variances and covariances, but also on maternal characters that influence them, and (2) time lags in the response to selection create a form of evolutionary momentum. These results have important implications for evolution in natural populations and practical applications in the economic improvement of domesticated species. We derive selection indices that maximize either the economic improvement in a single generation of artificial selection or the asymptotic rate of improvement in long-term selection programmes, based on individual merit or a combination of individual and family merit. Numerical examples show that accounting for maternal inheritance can lead to considerable increases in the efficiency of artificial selection.