Publication Date:
1996-08-30
Description:
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.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Richman, A D -- Uyenoyama, M K -- Kohn, J R -- GM 37841/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1996 Aug 30;273(5279):1212-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, University of California at San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0116, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8703052" target="_blank"〉PubMed〈/a〉
Keywords:
*Alleles
;
Amino Acid Sequence
;
*Genes, Plant
;
*Genetic Variation
;
Molecular Sequence Data
;
Phylogeny
;
Plant Proteins/chemistry/*genetics
;
Plants/classification/*genetics
;
Polymerase Chain Reaction
;
Selection, Genetic
;
Sequence Alignment
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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