Studies on the sterility induced by the male recombination factor 31.1 MRF in Drosophila melanogaster

Yannopoulos, G.

Genetical Research 32(3): 239-247


PMID: 109353
DOI: 10.1017/s0016672300018735
Accession: 006521998

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The sterility associated with male recombination induced by 31.1 MRF was studied genetically and cytologically. In all crosses female sterility mainly involved failure of the heterozygous females to lay eggs because their ovaries are atrophic. Under the optical microscope, the atrophic ovaries contained only germaria in their ovarioles. In some cases, 31.1 MRF affects only 1 of the 2 ovaries of the same female. Defective development of atrophic ovaries was apparently not due to influences from the rest of the body but should be attributed to the inability of the germ cells to differentiate. Various stocks and homologous chromosomes reacted differently to 31.1 MRF with respect to female sterility. In their effect on male sterility some strains behaved as neutral and others as reactive when mated with 31.1/Cy L4 males.