Conditional lethal: inviable when grown at 25C. Wild type at 16C. Viable when grown at 20C; partial ray loss at 20C. Shifting males during ray assembly to non-permissive temperature results in ray loss. No lineage defect.

Although hermaphrodites appear WT in other ways, there are some problems with T cell lineages (affecting the phasmids) and tail cell fusions. Variably Dyf. Male tail tip morphogenesis is also defective, resulting in blobby, "leptoderan" tails. Males are infertile due to an inability to properly copulate. tlp-1 encodes a nuclear protein with a single C2H2-type zinc finger domain and an N-terminal "SPLALLA" domain, similar to that of Sp1 transcription factors of vertebrates. The bx85 mutation involves a truncation of TLP-1 due to a frameshift caused by a 5-bp deletion.

WT strain. Isolated by D. Fitch in June 1990 from soil in Scott Emmons' compost heap in the Fort Greene section of Brooklyn, NY. A second strain, DF5038, was isolated from the same location one year later from the head and ventral segments of a male pill bug (Armadillidium vulgare). Hermaphroditic. Males are easily isolated by heat shocking L4 or early adult hermaphrodites at 30C for 6-12 hrs. Grows well at 6-25C on OP50. Dauer larvae accumulate under starved or overcrowded conditions. Freezes easily using C. elegans protocols with 90% viability. Previously called Rhabditis sp. See also WBPaper00003418. Formerly known as Oscheius myriophila.

Males are rayless. hlh-2(bx108) strongly and semi-dominantly enhances the ray-loss phenotype of lin-32(e1926).

Paralyzed Unc. Throws males. hlh-2(bx115) has no phenotype in this background.

bxIs13 [egl-5::GFP + lin-15(+)]. Him. egl-5::GFP reporter made from EM#286 (GFP inserted within the last few amino acids of the C-terminus) by integrating bxEx30 in EM588. High nuclear expression of transgene in males (good in seam cells, none in rectal epithelium), weak expression in hermaphrodites. Expression in 2-4 head neurons in males and hermaphrodites. egl-5 gene on reporter does not rescue egl-5(-).

Weakly semi-dominant, temperature sensitive, embryonic lethal mutant. 38% of embyros produced by homozygous mothers at 15C will hatch; 2% produced at 26C will hatch. Mutation is semi-dominant at 26C: 12% of embryos produced by heterozygous mothers hatched at 26C, and about 25% of the survivors were or295/or295, indicating the lethality is semi-dominant and maternal. Mutant embyros exhibit excess cortical actomyosin contractility (extra furrows and protrusions) in early embryonic cells, during interphase and most of mitosis. Throws males. or295 is a gga to aga substitution (G16R).

Temperature sensitive. Maintain at 15C. At 25C, hermaphrodites lay embryos that die. Transverse PO mitotic spindle, cytokinesis defects. Missense mutation at nucleotide #379 (cyt->tgt); amino acid #127 (R to C). Throws males.

Strongly semi-dominant, temperature sensitive, embryonic lethal mutant. 40% of embyros produced by homozygous mothers at 15C will hatch; 0% produced at 26C will hatch. Mutation is semi-dominant at 26C: 85% of embyros produced by heterozygous mothers hatched at 26C. Mutant embryos exhibit excess coritical actomyosin contractility (extra furrows and protrusions) in early embryonic cells; during interphase and most of mitosis. Throws males. or621 is a tcc to gcc substitution (S15A).

or28 is a non-conditional maternal-effect embryonic lethal mutant ; the anterior pharynx is absent. and embryonic lethality is 100% penetrant. Pick single WT heterozygous hermaphrodites to maintain strain; these hets fill up with a mix of dead embryos and larvae [11/16 dead embryos due to aneuploidy from translocation segregation and lethal homozygous hT2; vulvaless due to homozygous lin-2(e1309) mutation; about 10% of lin-2(e1309) worms are leaky and lay eggs/can be mated into]. The homozygous or28 hermaphrodites fill up with dead embryos. The lin-2 background helps to score embryonic lethality for both heterozygotes and or28 homozygotes. Strain produces a lot of males due to him-8(ec56). or28 is a G to D mis-sense mutation at amino acid position 123.

or28 is a non-conditional maternal-effect embryonic lethal mutant ; the anterior pharynx is absent. and embryonic lethality is 100% penetrant. Pick single WT heterozygous hermaphrodites to maintain strain; these hets produce 11/16 dead embryos due to aneuploidy from translocation segregation and lethal homozygous hT2. The homozygous or28 hermaphrodites produce all dead embryos with defective pharyngeal development. or28 is a G to D mis-sense mutation at amino acid position 123. Strain produces lots of males due to him-8(ec56).

Heterozygotes are WT and segregate WT, Lon males, lots of dead eggs, and Dpys. The Dpys should give all dead embryos at all temperatures. Approximately 60% of these dead embryos make excess mesoderm at the expense of endoderm, due to an E to MS fate transformation. Embryonic lethality is 100% penetrant for or46.

Heterozygotes are WT and segregate WT, Lon males, lots of dead eggs, and Dpys. The Dpys should give all dead embryos at all temperatures. Approximately 60% of these dead embryos make excess mesoderm at the expense of endoderm, due to an E to MS fate transformation. Embryonic lethality is 100% penetrant for or10.

ltIs37 [pie-1p::mCherry::his-58 + unc-119(+)] IV. ruIs57 [pie-1p::GFP::tubulin + unc-119(+)]. tmC18 balancer marked with myo-2p::mCherry and Dpy. Heterozygotes are wild-type with pharyngeal mCherry, and segregate mCherry+ heterozygotes, tmC18 homozygotes (mCherry+ Dpy) and non-mCherry klp-15/16 homozygotes. Homozygous double deletion mutants are fertile but produced reduced brood sizes with highly penetrant embryonic lethality; will also segregate some males. [NOTE: the ltIs37 [pie-1p::mCherry::his-58 + unc-119(+)] IV transgene was previously annotated as itIs37 in this strain. The correct name of the transgene is ltIs37 and not itIs37.] Reference: Chuang CH, et al., Biology Open 2020 9: bio052308 doi: 10.1242/bio.052308 Published 25 June 2020

ltIs37 [pie-1p::mCherry::his-58 + unc-119(+)] IV. ruIs57 [pie-1p::GFP::tubulin + unc-119(+)]. GFP tag inserted into endogenous aspm-1 locus. tmC18 balancer marked with myo-2p::mCherry and Dpy. Heterozygotes are wild-type with pharyngeal mCherry, and segregate mCherry+ heterozygotes, tmC18 homozygotes (mCherry+ Dpy) and non-mCherry triple mutant homozygotes. Homozygous triple mutants are fertile but produced reduced brood sizes with highly penetrant embryonic lethality; will also segregate some males. [NOTE: the ltIs37 [pie-1p::mCherry::his-58 + unc-119(+)] IV transgene was previously annotated as itIs37 in this strain. The correct name of the transgene is ltIs37 and not itIs37.] Reference: Chuang CH, et al., Biology Open 2020 9: bio052308 doi: 10.1242/bio.052308 Published 25 June 2020

Heterozygotes are WT and segregate WT, Uncs with a protruding vulva, Long males and dead eggs. Uncs give only embryonic lethals which lack gut and make excess mesoderm (E adopts an MS-like fate). or10 is a recessive maternal-effect embryonic lethal. Zygotic phenotype of or10 is protruding vulva and slight uncoordination.

Heterozygotes are WT and segregate WT, Sterile Dpys and Uncs which give only dead eggs at all temperatures. Throws males.

Heterozygotes are WT. Segregates Uncs which give only embryonic lethals which lack gut and make excess mesoderm (E adopts an MS-like fate). or39 is a recessive maternal-effect embryonic lethal. Throws males.

Temperature sensitive. Viable at 15C; lethal at 25C. At 25C, embryos exhibit defects in spindle orientation and cell fate patterning. Throws males.

Unc. Males are fertile.

Made by crossing MT3353 egl-15(n484) sma-5(n678) with N2 males and selecting animals that grew much better. FK312 probably only carries the sma-5(n678) mutation but that has not been confirmed by sequencing. Small body size, slow growth, abnormal intestinal granules, shorter lifespan than WT.

tmEx4487 [unc-18(+) + myo-2p::Venus]. Break points: In(F53B1.2 unc-18 In(lon-2 mec-10)) X. Covered region (Mb) 6.4 (2.1..8.5) Lon Mec (Unc). Pick fluorescent non-Unc to maintain array. Males carrying the array (Venus in pharynx) can mate. Reference: Iwata S, et al. Sci Rep. 2016 Sep 21;6:33840.

tmIs1240 [myo-2p::Venus, X: F23D12.4] X. tmEx4950 [unc-9(+) + vha-6p::GFP]. Pick non-Unc with bright GFP+ in gut to maintain array. Balancer marked with myo-2p::Venus. Mec (Unc). Balancer break points: In(mec-10 Y7A5A.20 In(odr-7 F59F4.2)) X. Covered region (Mb) 7.4 (8.5..15.8) Males carrying the array (intestinal GFP) can mate. Reference: Dejima K, et al. Cell Rep. 2018 Jan 2;22(1):232-241.

tmIs1233 [myo-2p::mCherry, X: F23D12.4] X. tmEx4950 [unc-9(+) + vha-6p::GFP]. Pick non-Unc with bright GFP+ in gut to maintain array. Balancer marked with myo-2p::mCherry. Mec (Unc). Balancer break points: In(mec-10 Y7A5A.20 In(odr-7 F59F4.2)) X. Covered region (Mb) 7.4 (8.5..15.8) Males carrying the array (intestinal GFP) can mate. Reference: Dejima K, et al. Cell Rep. 2018 Jan 2;22(1):232-241.

Dyf. Derived by crossing dye-filling mutant wu250 away from geIs3 (LG100 x N2 males). Reference: Burnett C, et al. Nature. 2011 Sep 21;477(7365):482-5.

Heterozygotes are WT and segregate WT, Lon males and dead eggs. Strain will occasionally throw some DpysRollers.

Heterozygotes are WT and segregate WT, dead eggs, and Lon males. Maintain by picking WT. Strain will occasionally throw some DpysRollers.

Heterozygotes are WT and segregate WT, Sterile Dpys and dead eggs. Throws males. Maintain by picking WT. See WBG 13 #4 p.96.

Heterozygotes are WT and segregate WT, DpySteriles and dead eggs, and males. tDf9 is embryonic lethal.

Heterozygotes are WT and segregate WT, Sterile Dpys and dead eggs. Throws males. Maintain by picking WT. See WBG 13 #4 p.96.

Heterozygotes are WT and segregate WT, Sterile Dpys and dead eggs. Throws males. Maintain by picking WT. See WBG 13 #4 p.96.

Heterozygotes are WT and segregate WT, DpySteriles and dead eggs, and males. tDf10 is embryonic lethal.

Heterozygotes are WT and segregate WT, Sterile Dpys and Uncs which give only dead eggs. Throws males.

Heterozygotes are WT and segregate WT, DpySteriles and Uncs which produce only dead eggs at 25C but viable progeny at 15C. Throws males.

Heterozygotes are WT and segregate WT, Uncs which produce dead eggs, and Dpy Steriles. Throws males.

Heterozygotes are WT and segregate WT, Dpy Steriles, and embryonic lethals. Throws males. t1478 PKA arm-5.

Heterozygotes are WT and segregate WT, Sterile Dpys and Uncs which give only dead eggs. Throws males.

Slow pumping. Egg laying defective. Low frequency of dauer formation. Residual serotonin immunoreactivity, rare and very faint (<1% of NSMs) in most stages, but nearly 100% of CP neurons in adult males show faint to moderate serotonin immunoreactivity. Males mate quite well (E. Hare and C. Loer). Some phenotypic defects originally attributed to mg280 in this strain are likely due to vs166. vs166 is a large deletion (approx. 9.8kb) in the cam-1 gene; flanking sequences are: 5'-gctactggtaaataaggtaa-3' and 5'-atgcttttaaagtttatatt-3' (Edith Myers, personal commnication). See MT15434 for a strain carrying mg280 without the cam-1 mutation.

Heterozygotes are WT and segregate WT, DpyUncs and Steriles which have an everted vulva. Segregates males, so may have a him- mutation? ar104 previously called evl-22 and mat-2. Do not distribute this strain; other labs should request it from the CGC. This strain cannot be distributed to commercial organizations. This strain cannot be used for any commercial purpose or for work on human subjects.

Heterozygotes are WT and segregate WT, DpyUncs and Steriles which have an everted vulva. Throws males. Do not distribute this strain; other labs should request it from the CGC. This strain cannot be distributed to commercial organizations. This strain cannot be used for any commercial purpose or for work on human subjects.

Unc. Temperature sensitive hypomorphic lin-12 allele. At restrictive temperature of 25C: 100% Egl in unc-32 background (95% Egl without unc-32); 30% have 2 anchor cells, some proximal mitosis, abnormal vulval lineages but has opening; leaks some eggs; mates with males. At permissive temperature of 15C: 93% Egl(+) and 7% Egl(-) [lin-12(d)-like: no anchor cell and no vulval opening]. Do not distribute this strain; other labs should request it from the CGC. This strain cannot be distributed to commercial organizations. This strain cannot be used for any commercial purpose or for work on human subjects.

Heterozygotes are WT and segregate WT, dead eggs, and Lon males. nhr-25 is homozygous embryonic lethal.

Heterozygotes are WT and segregate WT, Dpy Uncish with occasional Rol (nmy-1 dpy-8), Lon males, and dead eggs. nmy-1 homozygotes have a low brood size and are slow growing. sb115 is a null, truncation allele.

1.6 kb deletion in msi-1. Males have poor mating efficiency.

1.6 kb deletion in msi-1. Males have poor mating efficiency.

Temperature sensitive. At 22.5C, maternal effect embryonic lethal. Temperature shift-up to 22.5C during embryogenesis results in animals with Egl, Pvul and Psa (phasmid socket absent) phenotypes. Shift-up to 25C results in growth arrest at larval stage. The T cell division can be symmetric as in lin-17 mutants. At 15C, nearly WT. Males grown at 15C can mate very well. psa-1 encodes a homolog of yeast SW13, a component of the SWI/SNF complex. Sequence data of this strain revealed the mutation is actually GTC/CCC/TCA to GTC/CTC/TCA causing a P86L substitution (G. Hayes).

wrdSi3 [sun-1p::TIR1::F2A::mTagBFP2::AID*::NLS::tbb-2 3'UTR] (II:0.77). Endogenous dpy-27 locus tagged with AID element and myc to create a conditional allele using the auxin-inducible degron (AID). In absence of auxin, ~40% of worms are male due to him-8(me4) mutation. In the presence of auxin, ~100% of worms are male (hermaphrodite-lethal due to degradation of AID-tagged DPY-27). Reference: Li Q, et al. Inducible degradation of dosage compensation protein DPY-27 facilitates isolation of Caenorhabditis elegans males for molecular and biochemical analyses. bioRxiv 2022.01.27.478040; doi: https://doi.org/10.1101/2022.01.27.478040.

itIs153 [pie-1p::par-2::GFP + rol-6(su1006) + N2 genomic DNA]. ojIs1 [pie-1p::GFP::tbb-2 + unc-119(+)]. Maintain at 25C. Constructed by crossing heterozygous ojIs1 males into KK866 (itIs153) hermaphrodites and selecting for double homozygosity of the arrays. itIs153 is an integrated derivitive of axEx1094.

mCherry inserted at C terminus of endogenous meg-3 locus. fog-2(q71) is male/female strain. Maintain by mating. XX animals are female. XO animals are WT males. Reference: Putnam A, et al. Nat Struct Mol Biol. 2019 Mar;26(3):220-226.

mCherry inserted at C terminus of endogenous pgl-3 locus. fog-2(q71) is male/female strain. Maintain by mating. XX animals are female. XO animals are WT males. Reference: Putnam A, et al. Nat Struct Mol Biol. 2019 Mar;26(3):220-226.