Cytogenetic analysis of recombination in males of Drosophila ananassae |
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| Authors: | Muneo Matsuda Hirotami T Imai Yoshiko N Tobari |
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| Institution: | 1. Department of Biology, Tokyo Metropolitan University, 2-1-1, Fukasawa, Setagaya-ku, 158, Tokyo, Japan
2. National Institute of Genetics, Mishima, 411, Shizuoka-ken, Japan
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| Abstract: | Cytogenetic studies of recombination in males of Drosophila ananassae were carried out by examining F1 males derived from the mating of marker females, b se; bri ru of the BS stock, with males of two wild strains, TNG and L8. The male recombination values in both sections b-se (chromosome 2) and bri-ru (chromosome 3) are high in TNG F1 but extremely low in L8 F1 We demonstrate the presence of chiasmata in TNG F1 males at a frequency capable of accounting for the observed recombination values. A unique series of “iso-site aberrations” was also observed in TNG F1 males. Because of a parallelism in the distribution pattern between the chiasmata and the isosite aberrations, we propose that recombination in males of D. ananassae is meiotic in origin and that the iso-site aberrations are related to chiasma formation. |
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