Abstract
The e65 pi; bri ru stock of Drosophila ananassae produced an extremely high rate of recombination in males when made heterozygous with any one of the wild type stocks. We analyzed and characterized the genetic factors which caused this phenomenon. We show that the second chromosome of the e65 pi; bri ru stock carries an enhancer of male recombination. The enhancer, En(2)-ep, is located between Om(2C) and Arc. The enhancement of meiotic recombination both in males and females was also observed at the specific region between Om(2C) and Arc on 2L. The magnitude of increased recombination was 30-40 fold in males and 13-30 fold in females. The relation between the hotspot of recombination in both sexes and the enhancer of male recombination is discussed.
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