What is the best fitness measure in wild populations? A case study on the power of short-term fitness proxies to predict reproductive value
What is the best fitness measure in wild populations? A case study on the power of short-term fitness proxies to predict reproductive value
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野生种群的最佳健身措施是什么？
DOI：
10.1101/2021.11.19.469339
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Alif V
中科院分区：
文献类型：
--
作者：
Alif V
适应性是进化理论的核心，但很难准确测量。衡量长期适应性的一种方法是计算个体的繁殖值，它代表了个体传递给遥远后代的等位基因拷贝的预期数量。然而，这种适应度的度量很少使用，因为估计个体的生殖价值需要长期的谱系数据，这在野生种群中很少可用，因为从出生到死亡的个体通常是不可能的。因此，野生研究系统使用短期适应性指标作为代理，例如产生的后代数量。本研究比较了两种常用的短期指标，在不同的后代生命阶段（蛋，孵化，幼鸟和新兵）获得的健身，并比较了他们的能力，预测生殖值来自野生雀形目鸟类种群的遗传谱系。我们使用了20年的精确实地观察和一个近乎完整的遗传谱系来计算繁殖成功率，个体生长率和减寿健身作为终身健身措施，并作为年度减寿健身。我们比较了这些指标预测研究期结束时生殖价值和谱系存活的能力。三个短期健身代理预测生殖值和血统生存时，只有在招募阶段测量。不同适合度指标在同一子代阶段对繁殖值和家系存活率的预测差异不显著。一岁时的年度健身预测生殖值以及终身delifed健身。然而，没有一个短期的健身代理与生殖值密切相关。常用的短期适应性代理在招募阶段测量时最能预测长期适应性。因此，由于在招募阶段和生命的第一年的年度健身测量的终身健身是最好的代理长期健身短命的鸟类，我们鼓励他们的未来使用。
Fitness is at the core of evolutionary theory, but it is difficult to measure accurately. One way to measure long-term fitness is by calculating the individual’s reproductive value, which represents the expected number of allele copies an individual passes on to distant future generations. However, this metric of fitness is scarcely used because the estimation of individual’s reproductive value requires long-term pedigree data, which is rarely available in wild populations where following individuals from birth to death is often impossible. Wild study systems therefore use short-term fitness metrics as proxies, such as the number of offspring produced. This study compared two frequently used short-term metrics for fitness obtained at different offspring life stages (eggs, hatchlings, fledglings and recruits), and compared their ability to predict reproductive values derived from the genetic pedigree of a wild passerine bird population. We used twenty years of precise field observations and a near-complete genetic pedigree to calculate reproductive success, individual growth rate and de-lifed fitness as lifetime fitness measures, and as annual de-lifed fitness. We compared the power of these metrics to predict reproductive values and lineage survival to the end of the study period. The three short-term fitness proxies predict the reproductive values and lineage survival only when measured at the recruit stage. There were no significant differences between the different fitness proxies at the same offspring stages in predicting the reproductive values and lineage survival. Annual fitness at one year old predicted reproductive values equally well as lifetime de-lifed fitness. However, none of the short-term fitness proxies were strongly associated with the reproductive values. The commonly used short-term fitness proxies best predict long-term fitness when measured at recruitment stage. Thus, because lifetime fitness measured at recruit stage and annual fitness in the first year of life were the best proxies of long-term fitness in short-lived birds, we encourage their future use.
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DOI：
10.1098/rstb.2019.0356
发表时间：
2020-04-27
影响因子：
6.3
作者：
Grafen, Alan
通讯作者：
Grafen, Alan
影响因子：
3.1
作者：
Hunter, Darren C.;Pemberton, Josephine M.;Morrissey, Michael B.
通讯作者：
Morrissey, Michael B.
影响因子：
2.9
作者：
Brommer, JE;Gustafsson, L;Merilä, J
通讯作者：
Merilä, J
影响因子：
0.6
作者：
N. Grier;R. A. Fisher
通讯作者：
N. Grier;R. A. Fisher
年生产力的母体效应和遗传力
影响因子：
2.1
作者：
J. Schroeder;T. Burke;M. Mannarelli;D. Dawson;S Nakagawa
通讯作者：
S Nakagawa