Allelic diversity and gene genealogy at the self-incompatibility locus in the solanaceae
Allelic diversity and gene genealogy at the self-incompatibility locus in the solanaceae
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DOI：
10.1126/science.273.5279.1212
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发表时间：
1996-08-30
期刊：
影响因子：
56.9
通讯作者：
Kohn, JR
中科院分区：
文献类型：
--
作者：
Richman, AD;Uyenoyama, MK;Kohn, JR
开花植物的自交不亲和(S)基因座提供了一个通过平衡选择保持极端多态的例子。通过对S等位基因多样性的检验，确定了两个茄科植物的近期和长期有效种群规模(N-e)。对两种茄科植物近期N-e的估计相差一个数量级，与物种生态的差异一致。在一个物种中，证据与历史上的种群限制一致，尽管最近有很大的N-E。在另一种情况下，数百万年来没有显示出严重的瓶颈。瓶颈是创始人-事件物种形成不可或缺的一部分，受到平衡选择的基因座可以用来评估这种物种形成模式的频率。
The self-incompatibility (S) locus of flowering plants offers an example of extreme polymorphism maintained by balancing selection. Estimates of recent and long-term effective population size (N-e) were determined for two solanaceous species by examination of S-allele diversity. Estimates of recent N-e in two solanaceous species differed by an order of magnitude, consistent with difference in the species' ecology. In one species, the evidence was consistent with historical population restriction despite a large recent N-e. In the other, no severe bottleneck was indicated over millions of years. Bottlenecks are integral to founder-event speciation, and loci that are subject to balancing selection can be used to evaluate the frequency of this mode of speciation.