Isolation and characterization of Df(3R)BSC221
Jill Gresens and Kevin Cook
Bloomington Stock Center
Indiana University
Df(3R)BSC221 was isolated as a FLP recombinase-induced recombination event involving P{XP}d11515 and PBac{WH}f00935. The deletion was isolated as a chromosome lacking miniwhite markers in progeny of w1118; Dr1/TM6C, Sb1 females crossed to P{hsFLP}1, y1 w1118; P{XP}d11515/PBac{WH}f00935 males. The 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}BSC221 from the segment of P{XP}d11515 to the left of its FRT site and the segment of PBac{WH}f00935 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}d11515 to be at Release 3 genomic coordinate 2933219 on chromosome arm 3R. The Gene Disruption Project determined the insertion site of P{XP}d11515 to be at Release 3 genomic coordinate 2933501 on arm 3R. This corresponds to 84C1 on both the Release 3 and Release 4 genome maps. The predicted position of PBac{WH}f00935 on the Release 4 map is 84D2. Consequently, the cytological breakpoints of Df(3R)BSC221 are predicted to be 84C1;84D2. Df(3R)BSC221 failed to complement lap1, sas15 and l(3)s2214s2214.