RECOMBINATION IN DROSOPHILA MELANOGASTER MALE

Yuichiro Hiraizumi ¹, Barton Slatko ¹, Charles Langley ¹, and Annegreth Nill ¹

¹ Department of Zoology, the University of Texas at Austin, Austin, Texas 78712

T-007 strain of Drosophila melanogaster is known to show recombination in males. The present study established the following points: (1) Clustering occurrence of recombinant, unequal recovery of complementary products of recombination, relatively high frequency of recombination around centromeric region, and relatively frequent occurrence of mosaic phenontype flies—all of these seem to indicate that a considerable fraction of male recombination in the T-007 strain is of premeiotic, or somatic origin, although a fraction still could be of meiotic origin; (2) Male recombination occurs in the third as well as in the second chromosomes, and the frequencies of recombinations are comparable between these two chromosome pairs.