Isolation and characterization of Df(2L)BSC277
Stacey Christensen and Kevin Cook
Bloomington Stock Center
Indiana University
Df(2L)BSC277 was isolated as a FLP recombinase-induced recombination event involving P{XP}d05987 and PBac{WH}CG31851f03572. The deletion was isolated as a chromosome lacking miniwhite markers in progeny of P{hsFLP}1, y1 w1118; P{XP}d05987/PBac{WH}CG31851f03572 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}BSC277 from the segment of P{XP}d05987 to the left of its FRT site and the segment of PBac{WH}CG31851f03572 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}d05987 to be at Release 3 genomic coordinate 12821657 on chromosome arm 2L. The Gene Disruption project determined the insertion site of P{XP}d05987 to be at Release 3 genomic coordinate 12821673 on arm 2L. This corresponds to 34A1 on the Release 5 genome map. The predicted position of PBac{WH}CG31851f03572 on the Release 5 map is 34B2. Consequently, the cytological breakpoints of Df(2L)BSC277 are predicted to be 34A1;34B2. It failed to complement Vha68-2s4214 and Df(2L)Exel7055.