Busch Jeremiah W, Schoen Daniel J
Department of Biology, McGill University, 1205 Docteur Penfield, Montreal, QC H3A 1B1, Canada.
Trends Plant Sci. 2008 Mar;13(3):128-36. doi: 10.1016/j.tplants.2008.01.002. Epub 2008 Mar 4.
Self-incompatibility (SI) is a genetic barrier to inbreeding that is broadly distributed in angiosperms. In finite populations of SI plants, the loss of S-allele diversity can limit plant reproduction by reducing the availability of compatible mates. Many studies have shown that small or fragmented plant populations suffer from mate limitation. The advent of molecular typing of S-alleles in many species has paved the way to address quantitatively the importance of mate limitation, and to provide greater insight into why and how SI systems breakdown frequently in nature. In this review, we highlight the ecological factors that contribute to mate limitation in SI taxa, discuss their consequences for the evolution and functioning of SI, and propose new empirical research directions.
自交不亲和性（SI）是植物近交繁殖的一种遗传障碍，广泛存在于被子植物中。在自交不亲和植物的有限种群中，S等位基因多样性的丧失会通过减少可育配偶的数量来限制植物繁殖。许多研究表明，小型或碎片化的植物种群会受到配偶限制的影响。许多物种中S等位基因分子分型技术的出现，为定量研究配偶限制的重要性、深入了解自交不亲和系统在自然界中频繁崩溃的原因及方式铺平了道路。在本综述中，我们重点介绍了导致自交不亲和类群配偶限制的生态因素，讨论了其对自交不亲和性进化和功能的影响，并提出了新的实证研究方向。
