Search Strains

Severing and tagging of endogenous unc-22 locus with trans-splicing ICR and GFP using CRISPR/Cas9. muIs257 [myo-3p::wrmScarlet1-10::unc-54 3'UTR] I. Pharynx and body muscles are green; red fluorescence only in body wall muscles. Please contact Ryan Littlefield prior to publishing work using this strain.

Temperature-sensitive. Maintain at 15C. Phenotype dependent upon time of temperature shift: embryonic shift is Let, L3 shift is Spe, adult shift is Emb, additional defects include variations in body size, male tail defects, and paralysis. [NOTE (04/22/13): it appears this strain is carrying an unknown Him mutation.] Reference: Kulkarni M, Smith HE. PLoS Genet. 2008 Jul 18;4(7):e1000131.

Point mutation. Dominant. Slow moving Unc. Body Muscle abnormal. Growth slow. Reverts spontaneously.

Heterozygotes are WT and segregate WT, Uncs (at 20C and 25C) and Pats. Maintain by picking WT at or above 20C. See also WBPaper00005261.

Heterozygotes are WT and segregate WT, Pats and Uncs. st557 is antibody negative.

Heterozygotes are WT and segreate WT, Dpy Steriles, and lethals: arrested elongation at 2 fold; body wall muscle cells detach at embryonic stage when the muscle cells begin to contract - therefore, little embryonic movement is observed.

tjIs5 [pie-1p::GFP::plk-1 + unc-119(+)]. GFP::PLK-1 is found at the mitotic centrosomes, kinetochores, and midbody in early embyros. pID3.01-plk-1. Integration site unknown. Maintain at 25C to avoid transgene silencing.

tjIs6 [pie-1p::GFP::cdc-42 + unc-119(+)]. GFP::CDC-42 localizes to basement membranes in both embryos and germline, and to the anterior cortex of one-cell embryos. pID3.01-cdc-42. Integration site unknown.

Heterozygotes are WT and segregate WT, dead eggs (homozygous cdl-1(w37)), and DpyUnc. w37 carries a 4.7kb deletion that removed the entire cdl-1 ORF and part of the neighboring ORF (T19E10.1), with a small insetion of about 60 bp.

Male-female strain. Isolated in Bohorok, Sumatra from humus-like material probably from banana plants by P. Blum in June 1975. Conspecific with CB5161 by mating tests, and with CB5161, LKC28 and SB280 by RNA Polymerase II largest subunit sequence. sp. 4 in Kiontke and Sudhaus Wormbook Ecology chapter.

Rhabditis (Rhabditis) brassicae Southern, 1909. Found 3.10.87 in turf near a bank, Traben-Trarbach (Rheinland-Pfalz/Germany) (leg. M. Nimrich). Literature (description and ecological information): besides original description from Southern, 1909 : Buckley (1931): J. Helminth. 9: 197-204 (about R. broughtonalcocki, this is synonym to R. brassicae).

Male-female strain. Isolated by W. Sudhaus on Guadeloupe from rotting banana leaves on June 16, 1996. Conspecific with CB5161 by mating tests, and with CB5161, LKC28 and SB129 by RNA Polymerase II largest subunit sequence. sp. 4 in Kiontke and Sudhaus Wormbook Ecology chapter.

gaIs153 [(pPRSK29) F25B3.3p::FLAG::pab-1 + sur-5::GFP]. Pan-neural expression of FLAG-tagged PAB-1. Detect PAB-1 using anti-FLAG M2 antibody from Sigma. No map data for integrated transgene.

gaIs286 [unc-62(7b)::TY1::EGFP::3xFLAG(92C12) + unc-119(+)]. TY1::EGFP::3xFLAG tag inserted in frame at C-terminus of coding sequence by recombineering. A STOP-codon was inserted into exon 7a of unc-62 to generate an UNC-62(7b)-specific reporter. Recombineered fosmid was integrated by biolistic bombardment to produce strain OP602, which wa outcrossed to produce SD1894. References: Sarov, M, et al. Nat Methods (2006) 10:839-44. Gerstein MB, et al. Science. 2010 Dec 24;330(6012):1775-87. Strain was constructed as part of the Regulatory Element Project, part of modENCODE (http://www.modencode.org) Derived from parental strains BC1282 and SD1894.

gaIs285 [unc-62(7a)::TY1::EGFP::3xFLAG(92C12) + unc-119(+)]. TY1::EGFP::3xFLAG tag inserted in frame at C-terminus of coding sequence by recombineering. A STOP-codon was inserted into exon 7b of unc-62 to generate an UNC-62(7a)-specific reporter. Recombineered fosmid was integrated by biolistic bombardment to produce strain OP601, which wa outcrossed to produce SD1888. References: Sarov, M, et al. Nat Methods (2006) 10:839-44. Gerstein MB, et al. Science. 2010 Dec 24;330(6012):1775-87. Strain was constructed as part of the Regulatory Element Project, part of modENCODE (http://www.modencode.org).

gaIs285 [unc-62(7a)::TY1::EGFP::3xFLAG(92C12) + unc-119(+)]. TY1::EGFP::3xFLAG tag inserted in frame at C-terminus of coding sequence by recombineering. A STOP-codon was inserted into exon 7a of unc-62 to generate an UNC-62(7b)-specific reporter. Recombineered fosmid was integrated by biolistic bombardment to produce strain OP602, which was outcrossed to produce SD1894. glo-4(ok623) causes a a partially-penetrant Dpy phenotype. References: Sarov, M, et al. Nat Methods (2006) 10:839-44. Gerstein MB, et al. Science. 2010 Dec 24;330(6012):1775-87. Strain was constructed as part of the Regulatory Element Project, part of modENCODE (http://www.modencode.org). Derived from parental strains RB811 and SD1888.

gaIs286 [unc-62(7b)::TY1::EGFP::3xFLAG(92C12) + unc-119(+)]. TY1::EGFP::3xFLAG tag inserted in frame at C-terminus of coding sequence by recombineering. A STOP-codon was inserted into exon 7a of unc-62 to generate an UNC-62(7b)-specific reporter. Recombineered fosmid was integrated by biolistic bombardment to produce strain OP602, which wa outcrossed to produce SD1894. References: Sarov, M, et al. Nat Methods (2006) 10:839-44. Gerstein MB, et al. Science. 2010 Dec 24;330(6012):1775-87. Strain was constructed as part of the Regulatory Element Project, part of modENCODE (http://www.modencode.org)

gaIs286 [unc-62(7b)::TY1::EGFP::3xFLAG(92C12) + unc-119(+)]. TY1::EGFP::3xFLAG tag inserted in frame at C-terminus of coding sequence by recombineering. A STOP-codon was inserted into exon 7a of unc-62 to generate an UNC-62(7b)-specific reporter. Recombineered fosmid was integrated by biolistic bombardment to produce strain OP602, which wa outcrossed to produce SD1894. glo-4(ok623) causes a a partially-penetrant Dpy phenotype. References: Sarov, M, et al. Nat Methods (2006) 10:839-44. Gerstein MB, et al. Science. 2010 Dec 24;330(6012):1775-87. Strain was constructed as part of the Regulatory Element Project, part of modENCODE (http://www.modencode.org). Derived from parental strains RB811 and SD1894.

gaIs290 [elt-2::TY1::EGFP::3xFLAG(92C12) + unc-119(+)]. Reduced autofluorescence. TY1::EGFP::3xFLAG tag inserted in frame at C-terminus of coding sequence by recombineering. Recombineered fosmid was integrated by biolistic bombardment. References: Sarov, M, et al. Nat Methods (2006) 10:839-44. Mann F, et al. PLoS. Strain was constructed as part of the Regulatory Element Project, part of modENCODE (http://www.modencode.org)

gaIs290 [elt-2::TY1::EGFP::3xFLAG(92C12) + unc-119(+)]. Temperature-sensitive sterile. Maintain at 15C. TY1::EGFP::3xFLAG tag inserted in frame at C-terminus of coding sequence by recombineering. Recombineered fosmid was integrated by biolistic bombardment. References: Sarov, M, et al. Nat Methods (2006) 10:839-44. Mann F, et al. PLoS. Strain was constructed as part of the Regulatory Element Project, part of modENCODE (http://www.modencode.org)

gaIs290 [elt-2::TY1::EGFP::3xFLAG(92C12) + unc-119(+)]. RNAi-resistant. TY1::EGFP::3xFLAG tag inserted in frame at C-terminus of coding sequence by recombineering. Recombineered fosmid was integrated by biolistic bombardment. References: Sarov, M, et al. Nat Methods (2006) 10:839-44. Mann F, et al. PLoS. Strain was constructed as part of the Regulatory Element Project, part of modENCODE (http://www.modencode.org)

8xMS2 tag inserted at C-terminus of endogenous C42D4.3 locus. zjuEx2144 [semo-1p::MCP::24xSuntag + col-19p::scFv::sfGFP + ttx-3p::RFP]. Pick ttx-3::RFP+ animals to maintain. MS2-based signal Amplification with Suntag System (MASS). Enhanced MS2-based single-molecule RNA imaging system utilizes Suntag signal amplifier. Suntag is a 19 amino acid protein tag that binds to its specific single-chain variable fragment (scFv) antibody. zjuEx2144 transgene expression provides MS2 coat protein (MCP) fused to 24xSuntag and scFv tagged with GFP. When all the required elements of the MASS (MS2, MCP, 24xSuntag, and scFv antibodies) are present, bright GFP foci will mark the tagged RNA. Reference: Hu Y, et al. eLife. 2023 Mar 3;12:e82178. doi: 10.7554/eLife.82178. PMID: 36867026.

8xMS2 tag inserted at C-terminus of endogenous mai-1 locus. zjuEx2144 [semo-1p::MCP::24xSuntag + col-19p::scFv::sfGFP + ttx-3p::RFP]. Pick ttx-3::RFP+ animals to maintain. MS2-based signal Amplification with Suntag System (MASS). Enhanced MS2-based single-molecule RNA imaging system utilizes Suntag signal amplifier. Suntag is a 19 amino acid protein tag that binds to its specific single-chain variable fragment (scFv) antibody. zjuEx2144 transgene expression provides MS2 coat protein (MCP) fused to 24xSuntag and scFv tagged with GFP. When all the required elements of the MASS (MS2, MCP, 24xSuntag, and scFv antibodies) are present, bright GFP foci will mark the tagged RNA. Reference: Hu Y, et al. eLife. 2023 Mar 3;12:e82178. doi: 10.7554/eLife.82178. PMID: 36867026.

zjuEx2429 [col-19p::BFP::8xMS2 + semo-1p::MCP::24×Suntag + col-19p::scFv::sfGFP + myo-2p::GFP]. Pick GFP+ (pharynx) animals to maintain. MS2-based signal Amplification with Suntag System (MASS). Enhanced MS2-based single-molecule RNA imaging system utilizes Suntag signal amplifier. Suntag is a 19 amino acid protein tag that binds to its specific single-chain variable fragment (scFv) antibody. When all the required elements of the MASS (MS2, MCP, 24xSuntag, and scFv antibodies) are present, bright GFP foci will mark the tagged RNA. Reference: Hu Y, et al. eLife. 2023 Mar 3;12:e82178. doi: 10.7554/eLife.82178. PMID: 36867026.

zcIs14 [myo-3::GFP(mit)]. Stable transgenic line expressing GFP at high levels in mitochondria of body wall muscle. Slight developmental delay and reduced brood size observed.

Hets are WT and segregate WT, Dpy and males of both kinds.

Temperature-sensitive. Maintain at 15C. The embryos from homozygous mutant mothers display defects in the unequal cell divisions of P2 and P3, defects in partitioning of germ granules during these divisions, and defects in formation of the germ-line precursor cell P4. The embryos that lack P4 develop into sterile adults. These defects are incompletely expressed and sensitive to temperature. Homozygous mothers produce about 10% sterile progeny at 16C and 70% sterile progeny at 25C. The temperature-sensitive period is early in embryogenesis, from fertilization to about the 28-cell stage. See also WBPaper00002282.

Temperature sensitive sterility. The sterility has both a maternal and a non-maternal component. Can be maintained indefinitely at low temperatures (16-23 C), with 7-19% sterile offspring. When low-temperature-grown homozygotes are allowed to produce progeny at 25C, the percentage of sterile offspring is 75-85%; at 26C the percentage of sterile offspring is 100%. Throws males.

Temperature sensitive sterility. The sterility has both a maternal and a non-maternal component. Can be maintained indefinitely at low temperatures (16-23 C), with 7-19% sterile offspring. When low-temperature-grown homozygotes are allowed to produce progeny at 25C, the percentage of sterile offspring is 75-85%; at 26C the percentage of sterile offspring is 100%.

Temperature sensitive sterility. The sterility has both a maternal and a non-maternal component. Can be maintained indefinitely at low temperatures (16-23 C), with 7-19% sterile offspring. When low-temperature-grown homozygotes are allowed to produce progeny at 25C, the percentage of sterile offspring is 75-85%; at 26C the percentage of sterile offspring is 100%.

ssrIs1248 [ges-1p(deltaB)::rpl-22::3xHA + ges-1p(deltaB)::GFP + pSM(empty vector)]. ges-1p(deltaB) is an INT1-specific promoter. Strain can be used for INT1-specific RiboTRAP experiments. Generated in N2 background. Reference: Liu C, et al. bioRxiv 2025.10.03.680215; doi: https://doi.org/10.1101/2025.10.03.680215

ssrIs1251 [pho-1p::rpl-22::3xHA + pho-1p::mCherry + pSM(empty vector)]. pho-1p is an INT2-9-specific promoter. Strain can be used for INT2-9-specific RiboTRAP experiments. Generated in N2 background. Reference: Liu C, et al. bioRxiv 2025.10.03.680215; doi: https://doi.org/10.1101/2025.10.03.680215

Starved appearance: shorter body length, pale intestine, reduced pharyngeal pumping, smaller brood size and extended egg-laing period.

CRISPR/Cas9-engineered insertion of GFP tag into the large AO13 splice isoform of the endogenous unc-44 locus at amino acid 6303. Slightly reduced body bends while crawling. Reference: He L, et al. eLife 2020;9:e55111 doi: 10.7554/eLife.55111.

jcIs1 [ajm-1::GFP + unc-29(+) + rol-6(su1006)] IV. Heterozygotes are Rollers and segregate Rollers, Hmr inviable embyros and Egl Unc. ajm-1 was formerly known as jam-1 (Junction Associated Protein) and "the gene encoding the antigen recognized by the monoclonal antibody MH27." jcIs1 consists of pJS191, C45D3 and pRF4. Reference: Koppen M, et al. Nat Cell Biol. 2001 Nov;3(11):983-91.

jcIs1 [ajm-1::GFP + unc-29(+) + rol-6(su1006)] IV. itr-1(jc5) is cold sensitive. Progeny of homozygotes reared at 15C exhibit 95% maternal effect lethality, while progeny of homozygotes reared at 20C exhibit 15.2% lethality. Arrested embryos are defective in epithelial morphogenesis. ajm-1 was formerly known as jam-1 (Junction Associated Protein) and "the gene encoding the antigen recognized by the monoclonal antibody MH27." jcIs1 consists of pJS191, C45D3 and pRF4.

jcIs1 [ajm-1::GFP + unc-29(+) + rol-6(su1006)] IV. ajm-1 was formerly known as jam-1 (Junction Associated Protein) and "the gene encoding the antigen recognized by the monoclonal antibody MH27." jcIs1 consists of pJS191, C45D3 and pRF4. Reference: Koppen M, et al. Nat Cell Biol. 2001 Nov;3(11):983-91.

rubSi6 [eft-3p::scFv(glo)::GFP(smu-1 introns)::tbb-2 3’UTR] II. rubSi7 [eft-3p::24xGCN4::T2A::tagBFP::H2B::tbb-2 3’UTR]) IV. SunTag system allows visualization of translation throughout development in real-time. This strain expresses a SunTag reporter mRNA (24xGCN4::T2A::tagBFP::H2B::tbb-2 3’UTR ) and a SunTag antibody (scFv::GFP). In the absence of translation, GFP signal can be observed in the cytoplasm, nuclei and at epithelial apical membranes. At translation sites of the SunTag reporter, clustering of the GFP signal can be observed. Mature GCN4 proteins can be observed as dimmer GFP clusters. rubSi6 was inserted into ttTi5605 and also includes a partial duplication of the transgene (a portion of GFP with smu-1 introns and tbb-2 3’UTR) downstream of the tbb-2 3’UTR in the intact transgene. rubSi7 was inserted into cxTi10816. Reference: van der Salm E, et al. Development. 2025 May 15;152(10):dev204435. doi: 10.1242/dev.204435. PMID: 40260543.

This strain expresses a SunTag antibody (scFv::GFP) throughout development. GFP signal can be observed in the cytoplasm, nuclei and at epithelial apical membranes. rubSi6 [eft-3p::scfv(glo)::gfp(smu-1 introns)::tbb-2 3’UTR] was inserted into ttTi5605, and also includes a partial duplication of the transgene (a portion of GFP with smu-1 introns and tbb-2 3’UTR) downstream of the tbb-2 3’UTR in the intact transgene. Reference: van der Salm E, et al. Development. 2025 May 15;152(10):dev204435. doi: 10.1242/dev.204435. PMID: 40260543.

heSi149 [myo-3::CRE::tbb-2 3'UTR + unc-119(+)] X. Inserted at ttTi14024. Maintain at 15-25C. Expression of CRE recombinase in differentiated body wall muscle cells driven by the myo-3 promoter. [NOTE: this stock serves as a replacement for SV1461, which was found to be carrying an unidentified red fluorescent transgene in the background.] Reference: Ruijtenberg S & van den Heuvel S. Cell. 2015 Jul 16;162(2):300-13.

he314[pie-1p::GLO-ePDZ::mCherry::smu-1::tbb-2 3'UTR] II. e259[eft-3p::PH::eGFP::LOV::tbb-2 3'UTR]) IV. Superficially wild-type. CRISPR/Cas9 was used to create insertion alleles he314 and he259 insertions into N2 background at sites of known MosSCI insertions ttTi5605 and cxTi10816, respectively. ePDZ–LOV system transgenes allow use of blue light to control protein heterodimerization, in this case, membrane recruitment of ePDZ-tagged proteins of interest. Germline-optimized cytosolic ePDZ::mCherry-tagged SMU-1 (GLO-ePDZ::mCherry::SMU-1), and membrane-bound LOV2 domain fused to a pleckstrin-homology domain (PH::eGFP::LOV). GLO-ePDZ::mCherry is a germline-optimized variant coded to be less prone to silencing in the germline. Reference: Fielmich LE, et al. eLife 2018 Aug 15;7:e38198. doi: 10.7554/eLife.38198.

heIs9 [myo-3p::cyd-1 + myo-3p::cdk-4::Venus + myo-3p::GFP::H2B] IV. Expression of CYD-1, CDK-4::VENUS, and GFP::H2B in body wall muscles (BWM). Over-expression of tagged CYD-1 and tagged CDK-4 from integrated transgene causes incidental extra BWM nuclei. Expression levels are higher that those from heIs12 in SV860. Reference: Korzelius J, et al. PLoS Genet. 2011 Nov;7(11):e1002362. PMID: 22102824

heIs12 [myo-3p::cyd-1 + myo-3p::cdk-4::Venus + myo-3p::GFP::H2B]. Expression of CYD-1, CDK-4::VENUS, and GFP::H2B in body wall muscles (BWM). Over-expression of tagged CYD-1 and tagged CDK-4 from integrated transgene causes incidental extra BWM nuclei. Expression levels are lower that those from heIs9 in SV857. Reference: Korzelius J, et al. PLoS Genet. 2011 Nov;7(11):e1002362. PMID: 22102824

CRISPR/Cas9 engineered smg-4 null allele. smg-4(az152) allele is confirmed NMD-defective by both the presence of the protruding vulva phenotype and the accumulation of NMD-targeted isoforms. smg-4(az152) is easy to track in crosses by PCR and digestion with BstBI (see S1 text of Suzuki, et al. for sequence of allele) and essentially mimics ma116 in having a G->A mutation at the last base of intron 1. az152 also removes two bases of exon 2 and inserts 50nt in exon 2. Reference: Suzuki JMNGL, et al. PLoS Genet. 2022 Feb 10;18(2):e1010028. doi: 10.1371/journal.pgen.1010028. PMID: 35143478.

mCherry tag inserted inserted directly after start codon of endogenous drsh-1 locus, labeling both F26E4.10A.1 and F26E4.10B.1. mCherry fluorescence enriched in nuclei of embryos and germ cells. Reference: Knittel TL, et al. Nat Commun. 2025 Jul 1;16(1):5595. doi: 10.1038/s41467-025-60721-5. PMID: 40595566.

ceh-6(mg60) is lethal. Maintain by picking WT and check that it throws 1/4 Dpys. mg60 is a 1.3 kb deletion that removes part of the conserved POU-specific domain. PCR with primers PCR6-5 GAA-TTC-ATG-AAA-TCG-GAG-GCG-T (->) and PCR6-3 GTG-AGA-AGT-GAA-GAG-GAT-TGT-A (<-) yields a band of about 1.6 kb instead of 280 bp as in N2. Backcrossed more than 10 times; in addition, the left arm of LG I was recombined with lin-28 to remove the mutator locus.

PHA and PHB dye-filling defect. About 50% athermotactic. ch3 deletes exon 3, causes frameshift and premature stop. [NOTE: Miyazaki, et al. (2022) report that this strain carries the fln-2(ot611) mutation in the background.]

otIs433 [dat-1::NLS::RFP + ttx-3::mCherry] V. gtEx4094 [glit-1p::GFP::glit-1 3'UTR + myo-3p::mCherry]. Pick animals with red fluorescence in body muscles to maintain. Transcriptional glit-1 reporter. Reference: Offenburger SL, et al. https://www.biorxiv.org/content/early/2017/10/13/203067.

Endogenous lem-3 locus carries GFP tag and two misense mutations in conserved residues [Y556A G558A] of GIY-YIG nuclease domain. Homozygous viable, though [Y556A G558A] mutants exhibit increased embryonic lethality after irradiation and abolished localization of GFP::LEM-3 at the midbodies. Reference: Hong Y, et al. Nat Commun. 2018 Feb 20;9(1):728.

Semi-dominant. Reversible paralysis. Straight and rigid body form at the restrictive temperature (30C); recovers to WT when the temperature is lowered. Previously called mah-2(cn110) and unc-110(cn110). See WBPaper00004376.