Brown K E, Kelly J K
Department of Ecology and Evolutionary Biology, University of Kansas, Lawrence, KS, USA.
J Evol Biol. 2018 Jan;31(1):46-56. doi: 10.1111/jeb.13192. Epub 2017 Nov 8.
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.
拮抗多效性（AP）是不同适合度成分之间的一种遗传权衡。在一年生植物中，开花天数（DTF）和繁殖能力之间的权衡通常决定了在短生长季节中有多少个体能够存活到开花，并且还会影响存活个体的结实率。我们基于对黄猴面花（Mimulus guttatus）的大量实验构建了一个关于生存力和繁殖力选择的模型，但该模型适用于许多一年生物种。在令人惊讶的一般条件下，生存力/繁殖力权衡维持着稳定的多态性。我们还引入了环境参数的空间异质性和时间随机性。两者对于多态性来说都不是必需的，但空间异质性允许多态性的存在，同时还会产生适合度成分中经常观察到的非负相关性。
