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The Journal of Heredity 1979:70(5):297-300
© 1979 The American Genetic Association 70:297-300

research-article

Dynamics of correlated genetic systems

VI. Variation in recombination rates in experimental populations of Drosophila melanogaster

M. T. CLEGG, C. R. HORCH, and J. F. KIDWELL

Department of Botany, University of Georgia Athens, GA 30602
Division of Biology and Medicine, Brown University Providence, RI 02912

Abstract

Recombination fractions among four chromosome 3 enzyme loci were measured over a 20 generation period in experimental populations of Drosophila melanogasier. The experimental populations were initiated with complete pairwise linkage disequilibria among the marker loci, thereby providing an initial structure favorable to selection for recombination modification. The recombination data show no evidence of directional changes in recombination rates among the marker loci, although variation in estimates, both between families within generations and between generations was large. These materials also yielded much lower estimates for recombination fractions for the centromeric region of the third chromosome than previously reported. Taken in total, the experimental results show no evidence for recombination modification, although the results do indicate ample genetic variance for recombination rates.


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