PT  - JOURNAL ARTICLE
AU  - Richman, Adam D.
AU  - Uyenoyama, Marcy K.
AU  - Kohn, Joshua R.
TI  - Allelic Diversity and Gene Genealogy at the Self-Incompatibility Locus in the Solanaceae
AID  - 10.1126/science.273.5279.1212
DP  - 1996 Aug 30
TA  - Science
PG  - 1212--1216
VI  - 273
IP  - 5279
4099  - http://science.sciencemag.org/content/273/5279/1212.short
4100  - http://science.sciencemag.org/content/273/5279/1212.full
SO  - Science1996 Aug 30; 273
AB  - 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 (Ne) were determined for two solanaceous species by examination of S-allele diversity. Estimates of recent Ne in two solanaceous species differed by an order of magnitude, consistent with differences in the species' ecology. In one species, the evidence was consistent with historical population restriction despite a large recent Ne. 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.