Cryptic Evolution: Does Environmental Deterioration Have a Genetic Basis?
Cryptic Evolution: Does Environmental Deterioration Have a Genetic Basis?
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DOI：
10.1534/genetics.110.124990
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发表时间：
2011-04-01
期刊：
影响因子：
3.3
通讯作者：
Kruuk, Loeske E. B.
中科院分区：
文献类型：
--
作者：
Hadfield, Jarrod D.;Wilson, Alastair J.;Kruuk, Loeske E. B.
隐秘进化被定义为被同时发生的环境变化所掩盖的适应性进化变化。对神秘进化的实证研究通常将气候变化和/或人口密度增加作为经历神秘进化的种群所经历的有害环境变化的形式。然而，费舍尔（Fisher，1958）强调，进化变化本身可能是“环境恶化”的一个重要组成部分，库克等人重申了这一点。 （1990）在种内竞争的背景下。在这种形式下，环境恶化是因为随着人口的进化，获胜的谱系必须与连续几代中更多的获胜者竞争。这种“进化环境恶化”对于受资源竞争影响的性状的选择和进化与一般环境变化具有不同的影响。我们将库克模型重新表述为定量遗传模型，以表明它在形式上与定量遗传学家提出的最新发展相同。这提供了一个统计框架，用于区分环境变化和进化变化引起的环境恶化的替代假设。我们还证明，在没有发生表型变化的系统中，有许多合理的生物过程会产生预测育种值的模式，这些模式与被解释为神秘进化的模式一致，并且在解释这些模式时需要小心。这些过程包括突变、同胞竞争和隐形分数。
Cryptic evolution has been defined as adaptive evolutionary change being masked by concurrent environmental change. Empirical studies of cryptic evolution have usually invoked a changing climate and/or increasing population density as the form of detrimental environmental change experienced by a population undergoing cryptic evolution. However, Fisher (1958) emphasized that evolutionary change in itself is likely to be an important component of "environmental deterioration," a point restated by Cooke et al. (1990) in the context of intraspecific competition. In this form, environmental deterioration arises because a winning lineage has to compete against more winners in successive generations as the population evolves. This "evolutionary environmental deterioration" has different implications for the selection and evolution of traits influenced by resource competition than general environmental change. We reformulate Cooke's model as a quantitative genetic model to show that it is identical in form to more recent developments proposed by quantitative geneticists. This provides a statistical framework for discriminating between the alternative hypotheses of environmental change and environmental deterioration caused by evolutionary change. We also demonstrate that in systems where no phenotypic change has occurred, there are many reasonable biological processes that will generate patterns in predicted breeding values that are consistent with what has been interpreted as cryptic evolution, and care needs to be taken when interpreting these patterns. These processes include mutation, sib competition, and invisible fractions.