Sterility and changes in testis structure are described in hybrid males produced by crossing male recombination (MR) lines to standard laboratory stocks. Although the sterility is directly correlated with chromosome breakage in crosses of certain MR lines, not all MR lines express sterility or testi
An assay of somatic recombination in male recombination lines of Drosophila melanogaster
β Scribed by James N. Thompson; R. C. Woodruff; G. Bradley Schaefer
- Publisher
- Springer Netherlands
- Year
- 1978
- Tongue
- English
- Weight
- 502 KB
- Volume
- 49
- Category
- Article
- ISSN
- 0016-6707
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β¦ Synopsis
A variety of diverse genetic events, inchrding recombination in heterozygous males, sterility, and mutator activity, are often observed in hybrids produced when male Drosophila melanogaster from natural populations are crossed to laboratory strains. It has recently been observed that chromosome breakage in spermatocytes is correlated with male recombination and may indeed be the primary event explaining these diverse genetic phenomena. We have now tested whether increased recombination is also occurring in somatic tissue in these outcrossed lines; the evidence clearly demonstrates that it is not. These observations are discussed in the light of growing evidence that male recombination may be caused by a micro-organism.
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The effect of inversions on mitotic recombination outside the inversion was studied in inversion-heterozygotes. Seven euchromatic inversions of the X-chromosome, with breakpoints within the interval between two cell markers, were chosen. The size of the inverted region and the distance from the prox