A Genetic Analysis of the Rose-Gespleten Region (68c8-69b5) of Drosophila Melanogaster

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We describe a genetic analysis of the region 68C8-69B5 defined by Df(3L)vin-7. We have induced 35 new lethal mutations in this region, which together with 20 existing lethal mutations, visible mutations, genes identified by protein products and one gene deduced from complementation data fall into 37 complementation groups in this 35-band interval. Using existing and newly induced deficiencies we have assigned these to 11 intervals defined by deficiency breakpoints. Those mutations which fell in the same breakpoint interval as the Lsp-2 gene, which codes for the abundant larval serum protein 2, were the subject of detailed study. None was rescued by the active Lsp-2 gene transformed on to chromosome II and we conclude that, as yet, we have no lethal mutations of Lsp-2.

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