Effects of Genetic Recombination and Population Subdivision on Nucleotide Sequence Variation in Drosophila ananassae
Published 1 January 1994
Wolfgang Stephan
Citations22
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TL;DR
Genetic variation in regions of high and low recombination rates was quantified at the DNA sequence level for two natural Drosophila ananassae populations from Myanmar and India for whichGene flow between these populations is limited.
Abstract
Genetic variation in regions of high and low recombination rates was quantified at the DNA sequence level for two natural Drosophila ananassae populations from Myanmar and India. Gene flow between these populations is limited. Levels of DNA sequence variation in regions of low crossing-over per physical length are significantly lower than in regions of intermediate to high crossing-over. Furthermore fixed between-population differences were found in low crossing-over regions but not in regions of high crossing-over. In the latter ones frequency shifts in polymorphisms between populations are more gradual. Simple models of directional selection in conjunction with hitchhiking explain these observations only partially. Local adaptive sweeps have to be postulated to account for the rapid genetic differentiation in regions of restricted recombination.
Keywords
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