Maternal effects and heritability of annual productivity
Maternal effects and heritability of annual productivity
复制标题
年生产力的母体效应和遗传力
DOI：
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发表时间：
2012
影响因子：
2.1
通讯作者：
S Nakagawa
中科院分区：
文献类型：
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作者：
J. Schroeder;T. Burke;M. Mannarelli;D. Dawson;S Nakagawa
个体内的一致性和个体间的适应性异质性是选择发生的先决条件。然而，不同年份之间生产力的个体差异可能会有很大差异，特别是当生物体变得更老，更有经验时。我们研究了年生产力的个体一致性，生存和年生产力之间的协变，以及年生产力变化的来源，同时考虑到年龄的增长，以检验个体质量和资源分配生活史理论假设。我们使用来自纯种野生家雀种群的长期数据。随着年龄的增长，个体内的年生产力首先增加，然后下降，但由于个体质量和寿命与生产力之间没有相关性，因此没有选择性死亡。个体的年生产力是一致的（C = 0.49）。 狭义遗传力较低（h2 = 0.09），但母体效应解释了大部分变异（M = 0.33）。 这种效应可以影响进化过程，对于我们理解适应性的变化是如何维持的非常重要。
Within‐individual consistency and among‐individual heterogeneity in fitness are prerequisites for selection to take place. Within‐individual variation in productivity between years, however, can vary considerably, especially when organisms become older and more experienced. We examine individual consistency in annual productivity, the covariation between survival and annual productivity, and the sources of variation in annual productivity, while accounting for advancing age, to test the individual‐quality and resource‐allocation life‐history theory hypotheses. We use long‐term data from a pedigreed, wild population of house sparrows. Within‐individual annual productivity first increased and later decreased with age, but there were no selective mortality due to individual quality and no correlation between lifespan and productivity. Individuals were consistent in their annual productivity (C = 0.49). Narrow‐sense heritability was low (h2 = 0.09), but maternal effects explained much of the variation (M = 0.33). Such effects can influence evolutionary processes and are of major importance for our understanding of how variation in fitness can be maintained.
影响因子：
5.2
作者：
Monaghan, P.;Charmantier, A.;Ricklefs, R. E.
通讯作者：
Ricklefs, R. E.