Isolation and characterization of Df(2L)BSC209
Stacey Christensen and Kevin Cook
Bloomington Stock Center
Indiana University
Df(2L)BSC209 was isolated as a FLP recombinase-induced recombination event involving P{XP}d05552 and PBac{WH}pief05500. The deletion was isolated as a chromosome lacking miniwhite markers in progeny of P{hsFLP}1, y1 w1118; P{XP}d05552/PBac{WH}pief05500 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}BSC209 from the segment of P{XP}d05552 to the left of its FRT site and the segment of PBac{WH}pief05500 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}d05552 to be at Release 3 genomic coordinate 10314218 on chromosome arm 2L, which is predicted to lie in 31D7 on both the Release 3 and Release 4 maps. PBac{WH}pief05500 is predicted to lie in 31D11 on the Release 4 map. Consequently, the cytological breakpoints of Df(2L)BSC209 are predicted to be 31D7;31E1. It failed to complement cdc2E1-23, da1, RpS27Amfs31 and RnrLk06709.