The evolution of self-fertilization in perennials
The evolution of self-fertilization in perennials
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DOI：
10.1086/286085
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发表时间：
1997-11-01
影响因子：
2.9
通讯作者：
Bataillon, TM
中科院分区：
文献类型：
--
作者：
Morgan, MT;Schoen, DJ;Bataillon, TM
许多植物是多年生植物，但自花受精的研究通常不包括多年生生活史的特征。因此，我们开发的模型，包括自交，一种简单形式的多年生植物，成年近交衰退，和成年生存成本种子生产，我们的分析表明，成年人的近交衰退减少了与自交相关的遗传传递优势，特别是在长寿的多年生植物经历了许多季节的近交衰退。多年生植物也付出代价时，自交增加总种子集在未来的生存和繁殖的代价。这种生活史的考虑为一年生植物比多年生植物更能自花受精的普遍性提供了新的线索。过去的研究表明，生殖保证作为这种关联的解释，但常见的模式自交提供平等的生殖保证一年生植物和多年生植物。相反，多年生植物可能会避免出售，因为成年近亲繁殖的抑郁症和成本，以未来的生存和繁殖。
Many plants are perennials, but studies of self-fertilization do not usually include features of perennial life histories. We therefore develop models that include selfing, a simple form of perenniality, adult inbreeding depression, and an adult survivorship cost to seed production, Our analysis shows that inbreeding depression in adults diminishes the genetic transmission advantage associated with selfing, especially in long-lived perennials that experience inbreeding depression over many seasons. Perennials also pay a cost when selfing increases total seed set at the expense of future survivorship and reproduction. Such life-history considerations shed new light on the generalization that annuals self-fertilize more than perennials. Past research suggested reproductive assurance as an explanation for this association, but common modes of selfing offer equal reproductive assurance to annuals and perennials. Instead, perennials may avoid selling because of adult inbreeding depression and the cost to future survivorship and reproduction.