All Bsg25D protein coding sequence has been deleted. The following sequence (derived from the pTV[Cherry]-based donor) has been inserted in place of the deleted Bsg25D sequence: a single attP site and a loxP cassette which itself contains an mFRT71 cassette followed by Scer\GAL4 coding sequence and a polyadenylation signal (this GAL4 sequence is non-functional). The mFRT71 cassette contains 1: the mCherry coding region tagged with a membrane-targeting signal (Tag:Myr(Unk)) and followed by a polyadenylation signal, 2: a w+* marker.
The Bsg25D protein sequence has been deleted and replaced with a pTV[Cherry]-based sequence (see allele description).
Bsg25Dnull.R maternal-zygotic mutants show a modest decrease in survival to adulthood compared to controls but adults are fertile; third instar larvae crawl lower distances than controls.
Bsg25Dnull.R homozygous stage 16 embryo myotubes exhibit apparently normal nuclear spread and positioning; the microtubule organization is apparently normal. The same is observed in larval muscles.
Ninnull.R, ens[+]/ensswo has some die during embryonic stage | maternal effect phenotype
Ninnull.R, ens[+]/ensswo has majority die during embryonic stage | maternal effect phenotype
Ninnull.R, ens[+]/ensswo has lethal - all die before end of larval stage | maternal effect phenotype
Ninnull.R/Df(2L)BSC693, ens[+]/ensswo has some die during embryonic stage | maternal effect phenotype
Ninnull.R/Df(2L)BSC693, ens[+]/ensswo has majority die during embryonic stage | maternal effect phenotype
Ninnull.R/Df(2L)BSC693, ens[+]/ensswo has lethal - all die before end of larval stage | maternal effect phenotype
Ninnull.R/Dp(2;3)GV-CH321-49G22, ens[+]/ensswo has viable phenotype
Ninnull.R, ensswo has nucleus | embryonic stage 16 phenotype, suppressible by Dp(2;3)GV-CH321-49G22/+
Ninnull.R/Ninnull.R is a non-enhancer of nucleus | embryonic stage 16 phenotype of Plp5
Ninnull.R/Ninnull.R is a non-enhancer of embryonic somatic muscle cell | embryonic stage 16 phenotype of Plp5
Ninnull.R/Df(2L)BSC693 is a non-enhancer of nucleus | embryonic stage 16 phenotype of ensswo
Ninnull.R/Df(2L)BSC693 is a non-enhancer of embryonic somatic muscle cell | embryonic stage 16 phenotype of ensswo
The progeny from the cross between Bsg25Dnull.R/Bsg25Dnull.R fathers and either Bsg25Dnull.R/Bsg25Dnull.R, ensswo/+ or Bsg25Dnull.R/Df(2L)BSC693, ensswo/+ mothers is embryonic or larval lethal; progeny from the reciprocal cross does not show any major viability defects, as compared to controls. The lethality of the former is rescued by one copy of Dp(2;3)GV-CH321-49G22.
Bsg25Dnull.R/Bsg25Dnull.R, ensswo/+ and Bsg25Dnull.R/Df(2L)BSC693, ensswo/+ stage 16 embryos exhibit a small but significantly higher frequency of nucleus positioning defects in myotubes as compared to ensswo/+ individuals: nucleus clusters traverse less of the distance toward the muscle poles; in some myotubes, myonuclei are present as one cluster. The nucleus positioning defects of the former individuals are partially rescued by one copy of Dp(2;3)GV-CH321-49G22.
Bsg25Dnull.R, ensswo double homozygous stage 16 embryos exhibit the same severe myotube nucleus clustering as observed in ensswo single homozygotes.
Both Bsg25Dnull.R/Bsg25Dnull.R, Khc8/+ and Bsg25Dnull.R/Bsg25Dnull.R, Dhc64C4-19/+ stage 16 embryo myotubes present normal nuclear positioning.