Search Strains

Caenorhabditis elegans wild isolate. Isolated from a compost bin from a Midmar Allotment public vegetable garden (field 1 plot 39) near Edinburgh Scotland on Nov. 26, 2005. Haplotype (according to Cutter 2006 and Dolgin et al 2008): J. For whole-genome sequence-verified wild strains, please request from the Caenorhabditis Natural Diversity Resource (www.caendr.org).

upIs1 [mup-4::GFP + rol-6(su1006)]. Rollers. [NOTE: 11/2006: Pamela Hoppe determined that the strain is homozygous for mup-4.]

Dpy suppresses Bli and Lon. Strain appears to be only slightly Dpy. Useful for mapping, especially Unc mutations. Separately, dpy-11 causes dumpiness, bli-6 adult worms develop blisters on their bodies, and lon-2 worms are about 150% WT length.

Maintain under normal conditions. Reference: Beg AA & Jorgensen EM, Nat Neurosci. 2003 Nov;6(11):1145-52.

Unc. Not caused by ttTi5605. Mos1 allele generated by NemaGENETAG consortium (Laurent Segalat). [NOTE: 11/15/11 - This strain contains unc-119(ed9), not unc-119(ed3) as previously reported. (C. Frokjaer-Jensen)] [NOTE: The Dernburg lab has noticed an increased number of rad-51 foci in EG4322 compared to N2. Please use the outcrossed version of this strain (EG6699) instead, which does not have this problem. (C. Frokjaer-Jensen)]

Utah natural isolate carrying peel-1(qq99) I. EG4348 was collected by M. Ailion from Salt Lake City, UT. qq99 designates the naturally occurring nonsense mutation in peel-1. Reference: Seidel HS et al. PLoS Biol. 2011 Jul;9(7):e1001115. For whole-genome sequence-verified wild strains, please request from the Caenorhabditis Natural Diversity Resource (www.caendr.org).

Caenorhabditis sp. 9 Male-female strain. Isolated from a sample collected by Joel Ehrenkranz on May 20, 2008, around 11 AM in Shinkolobwe, Katanga Province, Democratic Republic of the Congo (~11°S, 26°E). The sample was collected from worked soil which contained organic material around the foundation of a wattle hut. This time of year was the dry season in Katanga Province, so daytime temperatures were in the high 70s and nighttime temperatures in the low 50s. The specimen was placed in a ziplock bag with a slice of apple for transport to Susan Mango's lab at the Huntsman Cancer Institute, Salt Lake City, Utah. From the date of collection until the specimen reached the lab was approximately 2 weeks.

oxIs494 [peel-1p::GFP::peel-1 3'UTR + Cbr-unc-119(+)] II. GFP is expressed in the spermatogenic germline. During spermatogenesis, GFP remains in the residual body and is not packaged into sperm. Reference: Seidel HS, et al. PLoS Biol. 2011 Jul;9(7):e1001115.

qqIr7 [peel-1(qq99)] I. oxSi78 [peel-1p::peel-1 (introns included)::GFP::peel-1 3'UTR + Cbr-unc-119(+)] II. Genetic background is a mixture of N2 and wild isolate EG4348. The oxSi78 insertion produces a PEEL-1::GFP translational fusion. PEEL-1::GFP is expressed in the spermatogenic germline and packaged into sperm. PEEL-1::GFP appears to localize to fibrous body-membranous organelles. PEEL-1::GFP does not rescue peel-1(qq99). Reference: Seidel HS, et al. PLoS Biol. 2011 Jul;9(7):e1001115.

oxSi87 [peel-1p::N-terminal 12 amino acids of PEEL-1::GFP::peel-1 3'UTR + Cbr-unc-119(+)] II. GFP is expressed in the spermatogenic germline. During spermatogenesis, GFP is packaged into sperm. Reference: Seidel HS, et al. PLoS Biol. 2011 Jul;9(7):e1001115.

oxSi120 [peel-1p::tagRFP::msp-142 3'UTR + unc-119(+)]. Reference: Batchelder EL, et al. Proc Natl Acad Sci U S A. 2011 Jul 12;108(28):11429-34.

Unc. Not caused by cxTi10882. Mos1 allele generated by NemaGENETAG consortium (Laurent Segalat). Grows best on HB101 bacteria. Reference: Frokjaer-Jensen C, et al., Nat Genet. 2008 Nov;40(11):1375-83.

oxTi211 [eft-3p::GFP::unc-54 3'UTR + hsp::peel-1 + NeoR + Cbr-unc-119(+)]. Broad, cytoplasmic green fluorescence. pCFJ708 inserted into unc-119(ed3) III (11X outcross) background. Heat-shock inducible negative selection co-inserted (hsp::peel-1). NeoR selection co-inserted. Can be used for positive and negative selection against insertion. Please see www.wormbuilder.org for exact insertion site.

oxTi411 [eft-3p::tdTomato::H2B::unc-54 3'UTR + Cbr-unc-119(+)]. Maintain at 20C; somewhat sick at 25C. Broad, nuclear red fluorescence. pCFJ453 inserted into unc-119(ed3) III (11X outcross) background. Please see www.wormbuilder.org for exact insertion site.

oxTi705 [eft-3p::tdTomato::H2B::unc-54 3'UTR + Cbr-unc-119(+)]. Maintain at 20C; somewhat sick at 25C. Broad, nuclear red fluorescence. pCFJ453 inserted into unc-119(ed3) III (11X outcross) background. Please see www.wormbuilder.org for exact insertion site.

oxTi611 [eft-3p::tdTomato::H2B::unc-54 3'UTR + Cbr-unc-119(+)]. Maintain at 20C; somewhat sick at 25C. Broad, nuclear red fluorescence. pCFJ453 inserted into unc-119(ed3) III (11X outcross) background. Please see www.wormbuilder.org for exact insertion site.

oxTi711 [eft-3p::tdTomato::H2B::unc-54 3'UTR + Cbr-unc-119(+)]. Maintain at 20C; somewhat sick at 25C. Broad, nuclear red fluorescence. pCFJ453 inserted into unc-119(ed3) III (11X outcross) background. Please see www.wormbuilder.org for exact insertion site.

oxTi302 [eft-3p::mCherry::tbb-2 3'UTR + Cbr-unc-119(+)]; inserted in Chr. I: 10,166,145. oxTi75 [eft-3p::GFP::H2B::tbb-2 3'UTR + unc-18(+)] II; inserted in Chr. II: 5,448,544. oxTi411 [eft-3p::tdTomato::H2B::unc-54 3'UTR + Cbr-unc-119(+)] inserted in Chr. III: 6,076,837. Him. Somewhat sick at higher temperatures. Maintain at 20C or below. This mapping strain uses three dominant fluorescent insertions that can be distinguished when scoring segregation. Please see www.wormbuilder.org for additional strain information.

oxTi76 [eft-3p::GFP::H2B::tbb-2 3'UTR + unc-18(+)]; inserted in Chr. IV: 11,899,008. oxTi405 [eft-3p::tdTomato::H2B::unc-54 3'UTR + Cbr-unc-119(+)]; inserted in Chr. V: 15,838,568. oxTi421 [eft-3p::mCherry::tbb-2 3'UTR] inserted in Chr. X: 6,180,397. Him. Somewhat sick at higher temperatures. Maintain at 20C or below. This mapping strain uses three dominant fluorescent insertions that can be distinguished when scoring segregation. Please see www.wormbuilder.org for additional strain information.

oxTi886 [myo-3p::GFP::tbb-2 3'UTR + Cbr-unc-119(+)] II. Strain is healthy. NOTE: This strain is not necessarily homozygous - please verify before using. Cytoplasmic green fluorescence in body wall muscles visible under dissection microscope. This strain can be used for mapping or to facilitate genetic crosses. Integration site: (II:-14.32). Insertion into T08E11.8. Please see wormbuilder.org for exact insertion site. miniMos insertion of pCFJ1400 into unc-119(ed3)(11x outcrosss) with Cbr-unc-119(+) selection.

oxTi887 [myo-3p::GFP::tbb-2 3'UTR + Cbr-unc-119(+)] II. Strain is healthy. NOTE: This strain is not necessarily homozygous - please verify before using. Cytoplasmic green fluorescence in body wall muscles visible under dissection microscope. This strain can be used for mapping or to facilitate genetic crosses. Integration site: (II:2.59). Insertion into T08E11.8. Please see wormbuilder.org for exact insertion site. miniMos insertion of pCFJ1400 into unc-119(ed3)(11x outcrosss) with Cbr-unc-119(+) selection.

oxTi894 [eft-3p::GFP::2xNLS::tbb-2 3'UTR + Cbr-unc-119(+)] V. Strain is healthy. NOTE: This strain is not necessarily homozygous - please verify before using. Nuclear green fluorescence is broadly expressed (in most cells) and visible under dissection microscope. This strain can be used for mapping or to facilitate genetic crosses. Integration site: (V:11.54). Insertion into srh-131. Please see wormbuilder.org for exact insertion site. miniMos insertion of pCFJ1661 into unc-119(ed3)(11x outcrosss) with Cbr-unc-119(+) selection.

oxTi907 [eft-3p::GFP::2xNLS::tbb-2 3'UTR + Cbr-unc-119(+)] V. Strain is healthy. NOTE: This strain is not necessarily homozygous - please verify before using. Nuclear green fluorescence is broadly expressed (in most cells) and visible under dissection microscope. This strain can be used for mapping or to facilitate genetic crosses. Integration site: (V:11.98). Insertion into srz-92 (pseudogene). Please see wormbuilder.org for exact insertion site. miniMos insertion of pCFJ1661 into unc-119(ed3)(11x outcrosss) with Cbr-unc-119(+) selection.

oxTi911 [eft-3p::GFP::2xNLS::tbb-2 3'UTR + Cbr-unc-119(+)] V. Strain is healthy. NOTE: This strain is not necessarily homozygous - please verify before using. Nuclear green fluorescence is broadly expressed (in most cells) and visible under dissection microscope. This strain can be used for mapping or to facilitate genetic crosses. Integration site: (V:4.95). Insertion into dhc-3. Please see wormbuilder.org for exact insertion site. miniMos insertion of pCFJ1661 into unc-119(ed3)(11x outcrosss) with Cbr-unc-119(+) selection.

oxTi914 [eft-3p::GFP::2xNLS::tbb-2 3'UTR + Cbr-unc-119(+)] IV. Strain is healthy. NOTE: This strain is not necessarily homozygous - please verify before using. Nuclear green fluorescence is broadly expressed (in most cells) and visible under dissection microscope. This strain can be used for mapping or to facilitate genetic crosses. Integration site: (IV:-25.76). Insertion into F56A11.7. Please see wormbuilder.org for exact insertion site. miniMos insertion of pCFJ1661 into unc-119(ed3)(11x outcrosss) with Cbr-unc-119(+) selection.

oxTi968 [eft-3p::GFP::2xNLS::tbb-2 3'UTR + Cbr-unc-119(+)] X. Strain is healthy. NOTE: This strain is not necessarily homozygous - please verify before using. Nuclear green fluorescence is broadly expressed (in most cells) and visible under dissection microscope. This strain can be used for mapping or to facilitate genetic crosses. Integration site: (X:-3.89). Insertion into C09B8.3. Please see wormbuilder.org for exact insertion site. miniMos insertion of pCFJ1661 into unc-119(ed3)(11x outcrosss) with Cbr-unc-119(+) selection.

oxTi971 [eft-3p::GFP::2xNLS::tbb-2 3'UTR + Cbr-unc-119(+)] IV. Strain is healthy. NOTE: This strain is not necessarily homozygous - please verify before using. Nuclear green fluorescence is broadly expressed (in most cells) and visible under dissection microscope. This strain can be used for mapping or to facilitate genetic crosses. Integration site: (IV:11.69). Insertion into Y64G10A.6. Please see wormbuilder.org for exact insertion site. miniMos insertion of pCFJ1661 into unc-119(ed3)(11x outcrosss) with Cbr-unc-119(+) selection.

oxTi974 [eft-3p::GFP::2xNLS::tbb-2 3'UTR + HygroR] II. Strain is healthy. NOTE: This strain is not necessarily homozygous - please verify before using. Nuclear green fluorescence is broadly expressed (in most cells) and visible under dissection microscope. This strain can be used for mapping or to facilitate genetic crosses. Integration site: (II:-11.63). Insertion into fbxb-105. Please see wormbuilder.org for exact insertion site. miniMos insertion of pCFJ1660 into N2 with hygromycin B selection.

oxTi1007 [eft-3p::GFP::2xNLS::tbb-2 3'UTR + NeoR] V. Strain is healthy. NOTE: This strain is not necessarily homozygous - please verify before using. Nuclear green fluorescence is broadly expressed (in most cells) and visible under dissection microscope. This strain can be used for mapping or to facilitate genetic crosses. Integration site: (V:5.53). Insertion into srd-11. Please see wormbuilder.org for exact insertion site. miniMos insertion of pCFJ1659 into N2 with neomycin selection.

oxTi1011 [eft-3p::GFP::2xNLS::tbb-2 3'UTR + NeoR] II. Strain is healthy. NOTE: This strain is not necessarily homozygous - please verify before using. Nuclear green fluorescence is broadly expressed (in most cells) and visible under dissection microscope. This strain can be used for mapping or to facilitate genetic crosses. Integration site: (II:-1.99). Intergenic insertion. Please see wormbuilder.org for exact insertion site. miniMos insertion of pCFJ1659 into N2 with neomycin selection.

Crispr/Cas9 engineered mutation in unc-119. ox819 is an 11 bp deletion causing a frameshift after V110 (UNC-119a) and then appends 29 out-of-frame amino acids before a stop codon. unc-119(ox819) animals are phenotypically identical to unc-119(ed3) animals and can be rescued by expression of the smaller C. briggsae unc-119 gene (Cbr-unc-119). Reference: Schwartz ML, et al. High-efficiency CRISPR gene editing in C. elegans using Cas9 integrated into the genome. bioRxiv 2021.08.03.454883; doi: https://doi.org/10.1101/2021.08.03.454883

oxTi1121 [mex-5p::Cas9(+smu-2 introns)::tbb-2 3'UTR + hsp-16.41p::Cre::tbb-2 3'UTR + lox2272]) V. The Cas9 transgene was optimized for germline expression by including 4 large PATC-rich introns from smu-2. Inserted into W03F9.11. Reference: Schwartz ML, et al. High-efficiency CRISPR gene editing in C. elegans using Cas9 integrated into the genome. bioRxiv 2021.08.03.454883; doi: https://doi.org/10.1101/2021.08.03.454883

Animals with the duplication are WT. Animals which have lost the duplication are Unc, Sterile and Vul at all temperatures.

Maintain under normal condition. Heterozygotes are WT with pharyngeal GFP signal, and segregate WT GFP, arrested nT1[qIs51] aneuploids, and non-GFP tm2469 homozygotes (Sterile). tm2469 m+z- are sterile adults. Homozygous nT1[qIs51] inviable. Pick WT GFP and check for correct segregation of progeny to maintain. Reference: Petty EL, et al. PLoS Genet. 2009 Oct;5(10):e1000699. doi: 10.1371/journal.pgen.1000699. Csankovszki G, et al. (2009) Curr Biol 19(1):9-19. [NOTE: new stock received at CGC 05/26/2021. Original stock received in 2010 had broken down and was no longer segregating as expected.]

cldIs5 [pie-1p::capg-1::GFP + unc-119(+)]. GFP tagged CAPG-1 driven by the pie-1 promoter; expression is detected in the germline and in embryos. References: Collette K, et al. J Cell Sci. 2011 Nov 1;124(Pt 21):3684-94. Bembenek JN, et al. Curr Biol. 2013 Jun 3;23(11):937-46.

Heterozygotes are Unc and segregate additional hets, Unc-76 om40 homozygotes and dead eggs. om40 animals have multiple germline defects.

Male phenotype: loss of rays 7-9; incomplete penetrance/expressivity (80%); T lineage defect. Hermaphrodite phenotype: lowered brood size (100 progeny/hermaphrodite). Hypomorphic allele: uDf1/mab-19(bx38) results in embryonic arrest during morphogenesis.

Male-female strain. Reference WBG 11(4):89. See also WBPaper00001874. May crawl off the plates. Previously called C. vulgaris BK and C. vulgariensis BK. Walter Sudhaus has tentatively described this strain as C. remanei ssp. vulgaris; this description is not official and is contigent upon its being published. See WBPaper00002633 and WBPaper00003993.

V6 produces rays instead of alae in pal-1; sop01 mutants. No obvious phenotype in a pal-1(+) background. Previously called sop-1(bx107).

bxIs14 [pkd-2::GFP + pdx-1]. Ray axon defective.

Derived from RB1739 and RB911.

ieSi57 [eft-3p::TIR1::mRuby::unc-54 3'UTR + Cbr-unc-119(+)] II. Single copy transgene inserted into chromosome II (oxTi179) expressing modified Arabidopsis thaliana TIR1 tagged with mRuby in the soma. AID* and emGFP tag inserted into endogenous smc-3 locus. Derived by crossing parental strains PHX6035 with CA1200. Reference: Cahoon CK, Libuda DE. Conditional immobilization for live imaging Caenorhabditis elegans using auxin-dependent protein depletion. G3 (Bethesda). 2021 Oct 19;11(11):jkab310. doi: 10.1093/g3journal/jkab310. PMID: 34534266; PMCID: PMC8527506.

jyEx4 [zip-2::GFP + myo-2p::mCherry]. Pick animals with mCherry+ pharynx to maintain. Array is stable; might have integrated. ZIP-2::GFP protein is only expressed in the intestine when animals are infected with pathogenic Pseudomonas aeruginosa strain (PA14) or when other processes (e.g. translation) are perturbed (see Dunbar TL, et al. for more information). Reference: Dunbar TL, et al. Cell Host Microbe. 2012 Apr 19;11(4):375-86.

jyEx6 [zip-2::GFP + myo-2p::mCherry]. Pick animals with mCherry+ pharynx to maintain. zip-2p::GFP reporter is constitutively on. Reference: Dunbar TL, et al. Cell Host Microbe. 2012 Apr 19;11(4):375-86.

ieSi11 [syp-3p::EmGFP::syp-3::syp-3 3'UTR + Cbr-unc-119(+)] II. Maintain at 16-20C. mKate2 tag inserted into the C-terminus of endogenous nucl-1 locus. Nucleolar mKate2 expression. GFP::SYP-3 expression is readily detected in spermatocytes and oocytes in the germline, and localizes to the interface between paired homologous chromosomes during most of meiotic prophase. Reference: Mejia-Trujillo R, et al. bioRxiv 2025.05.07.652530; doi: https://doi.org/10.1101/2025.05.07.652530.

wrdSi23 [eft-3p::TIR1:F2A:mTagBFP::tbb2 3' UTR:: loxP] I. ieSi11 [syp-3p::EmGFP::syp-3::syp-3 3'UTR + Cbr-unc-119(+)] II. Maintain at 16-20C. AID*::GFP tag inserted at N-terminus of endogenous rpoa-2 locus. GFP::SYP-3 expression is readily detected in spermatocytes and oocytes in the germline, and localizes to the interface between paired homologous chromosomes during most of meiotic prophase. mKate2 tag inserted into the C-terminus of endogenous nucl-1 locus. Nucleolar mKate2 expression. This strain can be used for auxin-inducible degradation (AID) of RPOA-2 in somatic tissues. Reference: Mejia-Trujillo R, et al. bioRxiv 2025.05.07.652530; doi: https://doi.org/10.1101/2025.05.07.652530.

Temperature-sensitive. Maintain at 15C. Animals form germline tumors that prevent fertility at restrictive temerature (25C). This is the first strain reported to be used for the isolation of germ cells for in vitro culture. This strain allows germ cells to remain viable for longer periods than other tumorous mutant strains tested. Reference: Chaudhari SH, et al. Dev Cell. 2016 Jul 11;38(1):33-46.

Temperature-sensitive embryonic lethal. Maintain at 15C. Reference: O'Rourke SM, et al. PLoS One. 2011 Mar 1;6(3):e16644.

ruIs32 [pie-1p::GFP::H2B + unc-119(+)] III. ruIs57 [pie-1p::GFP::tubulin + unc-119(+)]. Maintain at 15C. Temperature-sensitive embryonic-lethal at restrictive temperature of 26C; viable at permissive temperature of 15C. Reversed AP polarity axis at restrictive temperature with his-11::GFP and tubulin::GFP expression. Reference: Keikhaee MR, et al. PLoS One. 2014 Sep 4;9(9):e106484.

Semi-dominant. Temperature-sensitive embryonic lethal. Maintain at 15C. Reference: O'Rourke SM, et al. PLoS One. 2011 Mar 1;6(3):e16644.