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EFFECTS OF SELFING ON SELECTION FOR RECOMBINATION
D. Charlesworth 1, B. Charlesworth 1, and C. Strobeck 1
1 School of Biological Sciences, University of Sussex, Brighton,
BN1 9QG England
This paper describes the results of computer simulations of selection on a locus which affects the rate of recombination between a pair of loci under selection. Four different models of selection for increased recombination were examined. In our first two models, which involve hitchhiking effects, increased levels of selfing can lead to increased selection for recombination, but need not always do so. With two models of selection for recombination caused by fluctuations in the environment, increased selfing always led to increased selection for recombination. Constant-environment models with nonadditive fitnesses at the two selected loci were also studied. Selfing increased selection for modifiers decreasing recombination, compared with random-mating populations in which indeed there might be no selection for decreased recombination. At high levels of selfing, the intensity of selection against recombination was sometimes found to weaken again.
Submitted on May 5, 1976Revised on December 7, 1976
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