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NEUTRAL GENE FLOW ACROSS SINGLE LOCUS CLINES
Author(s) -
Gavrilets Sergey,
Cruzan Mitchell B.
Publication year - 1998
Publication title -
evolution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.84
H-Index - 199
eISSN - 1558-5646
pISSN - 0014-3820
DOI - 10.1111/j.1558-5646.1998.tb02009.x
Subject(s) - biology , gene flow , introgression , assortative mating , reproductive isolation , locus (genetics) , hybrid , genetics , selection (genetic algorithm) , allele , evolutionary biology , gene , mating , genetic variation , population , botany , demography , artificial intelligence , sociology , computer science
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 separately considered adult migration and pollen migration. Our theoretical results suggest that selection against hybrid formation in the form of fertility selection or assortative mating is more effective in preventing introgression of neutral alleles than is reduction in hybrid viability. We argue that in experimental studies of introgression testing of F 1 hybrids is as important as testing of parental forms. To illustrate the utility of this approach, we estimate the strength of the barrier to neutral gene flow between Piriqueta caroliniana and P. viridis , between Iris hexagona and I. fulva , and between Chorthippus brunneus and C. biguttulus.