Females expressing nenyadsRNA.UAS under the control of Scer\GAL4VP16.nos.UTR do not show significant meiotic chromosome segregation errors, as assessed by X-chromosome non-disjunction; in agreement, they do not show any obvious defect in meiotic recombination initiation in early pachytene cysts, as the expected DSBs are still detected (i.e. γH2AV foci).
Scer\GAL4VP16.nanos.UTR, naryaJJ6, nenyaRNAi.UAS has abnormal meiotic cell cycle | female phenotype
Scer\GAL4VP16.nanos.UTR, naryaG4, nenyaRNAi.UAS has abnormal meiotic cell cycle | female phenotype
Scer\GAL4VP16.nanos.UTR, naryaJJ6, nenyaRNAi.UAS has germline cyst phenotype
Scer\GAL4VP16.nanos.UTR, naryaJJ6, nenyaRNAi.UAS has germarium region 2a phenotype
naryaJJ6 homozygous females that also express nenyadsRNA.UAS under the control of Scer\GAL4VP16.nos.UTR show frequent meiotic chromosome segregation errors, as assessed by X-chromosome non-disjunction; in agreement, meiotic recombination fails to initiate in early pachytene cysts, as few/no DSBs (i.e. γH2AV foci) and no crossovers along the X chromosome are detected. The oocyte is correctly specified by early-mid pachytene but does not show any obvious defects in karyosome structure. These females do not show changes in fertility, as compared to controls.
naryaG4 homozygous females that also express nenyadsRNA.UAS under the control of Scer\GAL4VP16.nos.UTR show frequent meiotic chromosome segregation errors, as assessed by X-chromosome non-disjunction. Although there are no obvious defects in meiotic recombination initiation in early pachytene cysts, as the frequent DSBs are still formed (i.e. γH2AV foci), this does not translate into crossovers along the X chromosome; however, this does not seem to be due to a global DSB repair defect, as there is no delay in the removal of γH2AV foci at mid-pachytene. The oocyte is correctly specified by early-mid pachytene but does not show any obvious defects in karyosome structure.
naryaGFP/naryaGFP, Scer\GAL4VP16.nos.UTR>nenyadsRNA.UAS females do not show significant meiotic chromosome segregation errors, as assessed by X-chromosome non-disjunction.