Antagonistic pleiotropy can maintain fitness variation in annual plants
Antagonistic pleiotropy can maintain fitness variation in annual plants
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DOI：
10.1111/jeb.13192
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发表时间：
2018-01-01
影响因子：
2.1
通讯作者：
Kelly, J. K.
中科院分区：
文献类型：
--
作者：
Brown, K. E.;Kelly, J. K.
拮抗多效性（Antagonistic pleiotropy，AP）是不同适应性成分之间的遗传权衡。在一年生植物中，开花天数（DTF）和繁殖能力之间的权衡往往决定了有多少个体在短的生长季节存活开花，也影响了幸存者的种子集。我们开发了一个模型的可行性和繁殖力的选择告知许多实验的黄色monkeyflower，Mimulus guttatus，但适用于许多一年生物种。在令人惊讶的一般条件下，生存力/繁殖力的权衡保持稳定的多态性。我们还介绍了环境参数的空间异质性和时间随机性。多态性也不是必需的，但空间异质性允许多态性，同时也产生经常观察到的非负相关的健身组件。
Antagonistic pleiotropy (AP) is a genetic trade-off between different fitness components. In annual plants, a trade-off between days to flower (DTF) and reproductive capacity often determines how many individuals survive to flower in a short growing season, and also influences the seed set of survivors. We develop a model of viability and fecundity selection informed by many experiments on the yellow monkeyflower, Mimulus guttatus, but applicable to many annual species. A viability/fecundity trade-off maintains stable polymorphism under surprisingly general conditions. We also introduce both spatial heterogeneity and temporal stochasticity in environmental parameters. Neither is necessary for polymorphism, but spatial heterogeneity allows polymorphism while also generating the often observed non-negative correlations in fitness components.