Journal
JOURNAL OF EVOLUTIONARY BIOLOGY
Volume 17, Issue 1, Pages 177-183Publisher
WILEY
DOI: 10.1046/j.1420-9101.2003.00643.x
Keywords
hybridization; hybrid zone; cline; sexual selection; speciation
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We study the form of the clines in a female mating preference and male display trait using simulations of a hybrid zone. Allopatric populations of two species are connected by demes in a stepping stone arrangement. Results show that reproductive character displacement (a pattern of increased prezygotic isolation in sympatry compared with allopatry) may or may not result when there is reinforcement (defined here as the strengthening of prezygotic isolation as a result of selection against hybrids, relative to the amount of prezygotic isolation present when hybrids are not selected against). Further, reproductive character displacement of the preference may or may not occur when it occurs in the male display. We conclude that the absence of reproductive character displacement is not evidence against the operation of reinforcement.
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