Resource allocation and the evolution of self-fertilization in plants
Resource allocation and the evolution of self-fertilization in plants
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DOI：
10.1086/303310
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发表时间：
2000-02-01
影响因子：
2.9
通讯作者：
Zhang, DY
中科院分区：
文献类型：
--
作者：
Zhang, DY
建立了一个简单的部分自交植物资源分配的进化稳定策略模型，该模型将生殖和性别分配纳入一个框架。分析表明，如果女性健身增益线性增加的资源投资，总的生殖分配是不受性别分配，定义为生殖资源分配给男性功能的分数。在其他条件相同的情况下，如果自交后代的适合度大于异交后代的一半，则ESS的总生殖分配随自交率的增加而增加，而ESS的性别分配总是自交率的递减函数。自花受精在一年生植物中比多年生植物中更常见，这种关联通常被解释为生活史对交配系统的影响。本文中的模型表明，自花受精本身可以引起一年生习性的演变。结合花粉折扣的影响。可能没有任何影响，总的生殖分配，如果女性健身增益是一个线性函数的资源投资，虽然进化稳定的性别分配被改变。进化的自交率被认为是独立的生殖和性别分配下的大规模行动的假设，即自和异交花粉同时沉积在接受柱头和竞争毛皮进入胚珠。
This article develops a simple evolutionarily stable strategy (ESS) model of resource allocation in partially selfing plants, which incorporates reproductive and sex allocation into a single framework. The analysis shows that, if female fitness gain increases linearly with resource investment, total reproductive allocation is not affected by sex allocation, defined as the fraction of reproductive resources allocated to male function. All else being equal, the ESS total reproductive allocation increases with increasing selfing rate if the fitness of selfed progeny is more than half that of outcrossed progeny, while the ESS sex allocation is always a decreasing function of the selfing rate. Self-fertilization is much more common in annual than in perennial plants, and this association has been commonly interpreted in terms of an effect of life history on mating system. The model in this article shows that self-fertilization can itself cause the evolution of the annual habit. incorporating the effects of pollen discounting. may not have any influence on total reproductive allocation if female fitness gain is a linear function of resource investment, although the evolutionarily stable sex allocation is altered. Evolution of the selfing rate is found to be independent of reproductive and sex allocation under the mass-action assumption that self- and outcross pollen are deposited simultaneously on receptive stigmas and compete fur access to ovules.