Isolation and characterization of Df(2R)BSC425
Stacey Christensen, Kim Cook and Kevin Cook
Bloomington Stock Center
Indiana University
Df(2R)BSC425 was isolated as a FLP recombinase-induced recombination event involving P{XP}d01323 and PBac{WH}CG13155f03327. The deletion was isolated as a chromosome lacking miniwhite markers in progeny of P{hsFLP}1, y1 w1118; P{XP}d01323/PBac{WH}CG13155f03327 males crossed to w1118; P{hs-hid}2, wgSp-1/CyO females. These males were heat shocked as larvae as described in Parks et al., Nature Genetics 36: 288-292, 2004 (FBrf0175003). This cross and crosses in preceding and succeeding generations maintained the original genetic background of the Exelixis insertion stocks (Thibault et al., Nature Genetics 36: 283-287, 2004; FBrf0175002). The recombination event generated the genetic element P+PBac{XP5.WH5}BSC425 from the segment of P{XP}d01323 to the left of its FRT site and the segment of PBac{WH}CG13155f03327 to the right of its FRT site. Its presence was verified using the PCR methods and primers described in Parks et al. Exelixis, Inc. determined the insertion site of P{XP}d01323 to be Release 3 genomic coordinate 7323750 on chromosome arm 2R. The Gene Disruption project determined the insertion site of P{XP}d01323 to be Release 3 genomic coordinate 7323998 on arm 2R. This corresponds to 48F1 on the Release 3 and Release 5 genome maps. The predicted position of PBac{WH}CG13155f03327 on the Release 5 map is 49A1. Consequently, the cytological breakpoints of Df(2R)BSC425 are predicted to be 48F1;49A1. It failed to complement Camk04213 and Df(2R)Exel6061.