Single-generation estimates of individual fitness as proxies for long-term genetic contribution
Single-generation estimates of individual fitness as proxies for long-term genetic contribution
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DOI：
10.1086/382547
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发表时间：
2004-04-01
影响因子：
2.9
通讯作者：
Merilä, J
中科院分区：
文献类型：
--
作者：
Brommer, JE;Gustafsson, L;Merilä, J
个体适应度是一个核心的进化概念，但在自然选择的实证研究中如何定义它的问题仍然存在争议。从两种单独标记的鸟类（领捕蝇Ficedula albicollis和乌拉尔猫头鹰Strix uralensis）的长期人口研究中，我们比较了一个率敏感（lambda（ind））和一个率不敏感（终身生殖成功[LRS]）估计的个体适应度与长期遗传适应度的估计。后者的计算方法是通过追踪遗传谱系并考虑到种群不完全封闭的事实，估计两代以上后种群中存在的基因拷贝数。当计算雏鸟，率不敏感的估计个人健身相关性好于率敏感的估计估计与估计的长期遗传贡献。在计算新兵时，两类估计的表现同样出色。结果支持的论点，简单的，率不敏感的措施，如LRS的适应度，提供了一个有效的和良好的估计适应自然种群的进化研究。
Individual fitness is a central evolutionary concept, but the question of how it should be defined in empirical studies of natural selection remains contentious. Using founding cohorts from long-term population studies of two species of individually marked birds (collared flycatcher Ficedula albicollis and Ural owl Strix uralensis), we compared a rate-sensitive (lambda(ind)) and a rate-insensitive (lifetime reproductive success [LRS]) estimate of individual fitness with an estimate of long-term genetic fitness. The latter was calculated as the number of gene copies present in the population after more than two generations, as estimated by tracing genetic lineages and accounting for the fact that populations were not completely closed. When counting fledglings, rate-insensitive estimates of individual fitness correlated better than rate-sensitive estimates with estimated long-term genetic contribution. When counting recruits, both classes of estimates performed equally well. The results support the contention that simple, rate-insensitive measures of fitness, such as LRS, provide a valid and good estimate of fitness in evolutionary studies of natural populations.