アナナスショウジョウバエの雄組換促進・抑制遺伝子の位置と作用機構〔英文〕

概要

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Genetic elements controlling male recombination were detected in the autosomes of the two wild strains, L8 and TNG, and a marker stock, b Arc se; bri ru, of Drosophila ananassae. In the L8 strain, a dominant enhancer, En(2)-cm, which acts on both chromosomes 2 and 3 in unison, is located between the b and Arc loci in the left arm of chromosome 2. In addition, a reducer, Ra, of the En(2)-cm is located in the right arm of chromosome 3 of this strain. The action of the reducer is expressed as progressive decrease in recombination frequency with increasing age of male parent. No such single major enhancer was present in the TNG strain. However, each of the three arms, 2L, 2R, and 3R, was found to carry genetic elements which cause male recombination. A suppressor, Su(2)-bs, which almost completely suppresses male recombination in males carrying En(2)-cm, was found in the left arm of chromosome 2, between the bw and Arc loci, of the b Arc se; bri ru stock. This suppressor has no effect on the polygenic enhancers of the TNG strain.
日本遺伝学会の論文