wing (with msl-3ΔCD.Tag:TAP)
One copy of msl-31 has no effect on hemocyte proliferation in third instar larvae.
One copy of msl-31 is unable to suppress position effect variegation (PEV) at the w locus caused by In(1)wm4.
One copy of msl-31 weakly suppresses the telomeric position effect (TPE) in stocks carrying a variegating P{hsp26-pt-T}39C-5 insertion at the telomere of the left arm of chromosome two.
Homozygous mutant msl-31 flies carrying msl-3ΔCD.T:Zzzz\TAP display a 2-day developmental delay with respect to wild-type controls and exhibit held-out wings. Adult males are unhealthy and infertile.
Homozygous mutant msl-31 flies carrying msl-3SYD62A.T:Zzzz\TAP display a 2-day developmental delay with respect to wild-type controls.
Homozygous mutant msl-31 flies carrying msl-3W59G.T:Zzzz\TAP display a 2-day developmental delay with respect to wild-type controls.
Homozygous males show appreciable survival to larval stages (day 5) in the presence of infection with the "male-killing" bacterium S.poulsonii when their mother is also homozygous, while infected heterozygous sibling males show no survival to day 5. Homozygous and heterozygous infected male embryos derived from heterozygous females show no survival to day 5.
Males survive until late larvae or early pupae, though their development is greatly delayed. The mle product is not associated with the X chromosomes in msl-3 mutants. mle binding to X chromosomes of Sxlf1/Sxlfhv1 females is also dependent on msl-3 function. Sxlf1/Sxlfhv1 females that are also homozygous for mutants at msl-1, msl-2 or msl-3 develop as intersexes of the mosaic type.
Sxlf1 heterozygous female progeny derived from heterozygous da1 mothers have reduced viability. The viability is increased if the Sxlf1/+ progeny are also carrying msl-31, and is decreased if the da1/+ mothers are also carrying msl-31. The frequency of sex transformation in Sxlf1/+ female progeny derived from da1/+ mothers is increased if either the mothers or the progeny are homozygous for msl-31. The frequency of morphological abnormalities seen in Sxlf1/+ female progeny derived from da1/+ mothers is greatly reduced if the progeny are also homozygous for msl-31.
male-lethal
msl-3[+]/msl-31, scsisB-1, sisA[+]/sisA1 has lethal | dominant | female | maternal effect phenotype, suppressible | maternal effect | partially by SxlM1/Sxl[+]
msl-3[+]/msl-31 is an enhancer | maternal effect of partially lethal - majority die | dominant | female phenotype of scsisB-1, sisA[+]/sisA1
msl-3[+]/msl-31 is a suppressor | partially of increased cell number | third instar larval stage phenotype of Hsap\RUNX1::Hsap\RUNX1T1UAS.cSa, Scer\GAL4Hml.Δ
Sxl[+]/SxlfP7B0, msl-31 has lethal | female | maternal effect phenotype
msl-31, sisA[+]/sisA1 has lethal | female | maternal effect phenotype
Sxl[+]/Sxlf9, msl-31 has lethal | female | maternal effect phenotype
msl-31, sc[+]/scsisB-1 has lethal | female | maternal effect | heat sensitive phenotype
msl-31 is a non-enhancer of phenotype of msl-1C.hs.Tag:FLAG
msl-31 is a non-enhancer of phenotype of msl-1Δ84.Tag:FLAG
msl-3[+]/msl-31 is a suppressor | partially of embryonic/larval hemocyte | third instar larval stage phenotype of Hsap\RUNX1::Hsap\RUNX1T1UAS.cSa, Scer\GAL4Hml.Δ
msl-31 is a non-suppressor of phenotype of msl-1Δ84.Tag:FLAG
msl-31 is a non-suppressor of phenotype of msl-1C.hs.Tag:FLAG
msl-31 is a non-suppressor of germline cell phenotype of ovounspecified
Sxlf1, msl-31 has abdominal sternite 6 | female phenotype
Sxlf1, msl-31 has abdominal tergite 6 | female phenotype
Sxlf1, msl-31 has abdominal tergite 5 | female phenotype
Sxlf1, msl-31 has prothoracic metatarsus | female phenotype
Sxlf1, msl-31 has oviprovector phenotype
The viability of SxlfP7B0/+, sisA1/+ or Sxlf9/+ females is significantly reduced if they also carry one maternally-derived copy of msl-31.
The viability of scsisB-1/+ females raised at the non-permissive temperature of 29[o]C is significantly reduced if they also carry one maternally-derived copy of msl-31.
One maternally-derived copy of msl-31 significantly reduces the viability of scsisB-1 sisA1/+ females so that they show almost complete lethality. One paternally-derived copy of msl-31 significantly reduces the viability of scsisB-1 sisA1/+ females, although this zygotic effect is generally weaker than the maternal one.
The addition of msl-31 to flies containing a single copy of msl-1Δ84.T:Zzzz\FLAG in weak heatshock conditions has no effect on the male viability phenotype seen in these flies. The addition of msl-31 to flies containing a single copy of msl-1C.hs.T:Zzzz\FLAG in weak heatshock conditions has no effect on the male viability phenotype seen in these flies.
Does not suppress the germline death phenotype of ovounspecified females.
Sxlf1/+ chromosomal females also homozygous or heterozygous msl-31 show variable transformation of sexually dimorphic structures to male characteristics. The frequency of transformation is not high, is higher in females homozygous (rather than heterozygous) for msl-31, and expression is incomplete. The frequency of transformation is higher in female flies with mothers homozygous msl-31. Sex combs are only seen in Sxlf1/+ females homozygous for msl-31.
One copy of msl-31 moderately suppresses the hemocyte overproliferation seen in third instar larvae when Hsap\RUNX1::Hsap\RUNX1T1Scer\UAS.cSa is expressed under the control of Scer\GAL4Hml.Δ.
msl-31 is rescued by msl-3WT.Tag:TAP
msl-31 is rescued by msl-3EPAA.Tag:TAP
msl-31 is rescued by msl-3+t.Tag:TAP
msl-31 is partially rescued by msl-3Y31A.Tag:TAP
msl-31 is partially rescued by msl-3ΔCD.Tag:TAP
msl-31 is partially rescued by msl-3W59G.Tag:TAP
msl-31 is partially rescued by msl-3SYD62A.Tag:TAP
msl-31 is not rescued by msl-3LYT30A.Tag:TAP
msl-3WT.T:Zzzz\TAP rescues the male lethality caused by msl-31.
msl-3Y31A.T:Zzzz\TAP partially rescues (31.9%) the male lethality caused by msl-31.
msl-3EPAA.T:Zzzz\TAP rescues the male lethality caused by msl-31.
H4Ac16, acetylated form of His4, is not localised to the X chromosome in male salivary gland nuclei.
A P-element maps near the 5' end of the adjacent gene, anon-65Ea but may not be responsible for the mutant phenotype: rescue constructs that do not include the site of insertion of the P-element can fully rescue the msl-3 mutant phenotype.