NEUTRAL GENE FLOW ACROSS SINGLE-LOCUS CLINES

Citation
S. Gavrilets et Mb. Cruzan, NEUTRAL GENE FLOW ACROSS SINGLE-LOCUS CLINES, Evolution, 52(5), 1998, pp. 1277-1284
Citations number
69
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Biology Miscellaneous","Genetics & Heredity",Ecology
Journal title
ISSN journal
0014-3820
Volume
52
Issue
5
Year of publication
1998
Pages
1277 - 1284
Database
ISI
SICI code
0014-3820(1998)52:5<1277:NGFASC>2.0.ZU;2-0
Abstract
We study the strength of the genetic barrier to neutral gene flow in a general one-locus, two-allele model that includes viability selection as well as fertility selection and premating isolation. We have separ ately considered adult migration and pollen migration. Our theoretical results suggest that selection against hybrid formation in the form o f fertility selection or assortative mating is more effective in preve nting introgression of neutral alleles than is reduction in hybrid via bility. We argue that in experimental studies of introgression testing of F-1 hybrids is as important as testing of parental forms. To illus trate the utility of this approach, we estimate the strength of the ba rrier to neutral gene flow between Piriqueta caroliniana and P. viridi s, between Iris hexagona and I. fulva, and between Chorthippus brunneu s and C. biguttulus.