Search Strains

oxIs12 [unc-47p::GFP + lin-15(+)]. Ventral cord commissural motor neuron axon guidance defects. Mild Unc.

oxIs12 [unc-47p::GFP + lin-15(+)]. Ventral cord commissural motor neuron axon guidance defects. Mild Unc.

Heterozygotes are wild-type with pharyngeal GFP signal, and segregate WT GFP, arrested nT1[qIs51] aneuploids, and non-GFP rike-1(syb1165) homozygotes (early larval lethality). Homozygous nT1[qIs51] inviable. Pick WT GFP and check for correct segregation of progeny to maintain. Reference: Cheng X, et al. Autophagy. 2023 Jan;19(1):241-255. doi: 10.1080/15548627.2022.2071381. PMID: 35521960.

C. briggsae wild type strain collected from Okayama, Japan. For whole-genome sequence-verified wild strains, please request from the Caenorhabditis Natural Diversity Resource (www.caendr.org).

C. briggsae wild type strain collected in Sendai, Japan. For whole-genome sequence-verified wild strains, please request from the Caenorhabditis Natural Diversity Resource (www.caendr.org).

Superficially wild-type except for a slightly shorter body length in adults. Crispr/Cas9 was used to create a 13 bp deletion in exon7 of ccar-1a; breakpoints: CTGATTCGGGAG/sda11/ATCGGAAGTTTC. sda11 is an isoform-specific deletion allele. It only affects the function of CCAR-1A and CCAR-1D, but not CCAR-1B and C. In addition, because CCAR-1D is not expressed in embryos,this allele can be used to specifically inactivate CCAR-1A (the full-length isoform that is the most similar to human CCAR1) during embryogenesis. Reference: Fu R, et al. J Cell Sci. 2018 May 10.

sos-1 gain-of-function allele originally isolated as a suppressor of sem-5(n1619) lethality. pd10 causes a E99K substitution within the N-terminal histone fold domain of SOS-1. Single mutants appear wild-type.

sos-1(pd9) is a gain-of-function allele causing a C662Y substitution within the Ras exchange motif of SOS-1. Originally isolated as a suppressor of sem-5(n1619) lethality. Single mutants appear wild-type. Reference: Wooller A & Hopper N. (2014) European Worm Meeting. (Anyone using this allele may cite Neil Hopper as a personal communication based on this meeting abstract.)

Caenorhabditis sp. 77 wild isolate. Male-female. Maintain at 20C or warmer. Elegans group. Isofemale line isolated from rotting banana flowers collected in a forest near Batu, East Java, Indonesia, on 28 Apr 2024. GPS -7.803387, 112.516604. Reference: Devi, et al. G3 (Bethesda). 2025 Aug 6;15(8):jkaf134. doi: 10.1093/g3journal/jkaf134. PMID: 40542721.

Caenorhabditis sp. 78 wild isolate. Male-female. Maintain at 20C or warmer. Elegans group. Isofemale line isolated from rotting flowers of Stewartia pseudocamellia collected near Malino, South Sulawesi, Indonesia, on 6 May 2024. GPS -5.242944, 119.868592. Reference: Devi, et al. G3 (Bethesda). 2025 Aug 6;15(8):jkaf134. doi: 10.1093/g3journal/jkaf134. PMID: 40542721.

Caenorhabditis sp. 79 wild isolate. Male-female. Maintain at 20C or warmer. Elegans group. Isofemale line isolated from leaf litter collected in a forest near Jeneberang River Lake, Parangloe, South Sulawesi, Indonesia, on 6 May 2024. GPS -5.238297, 119.642281. Reference: Devi, et al. G3 (Bethesda). 2025 Aug 6;15(8):jkaf134. doi: 10.1093/g3journal/jkaf134. PMID: 40542721.

Caenorhabditis sp. 81 wild isolate. Male-female. Maintain at 20C or warmer. Elegans group. Isofemale line isolated from rotting Brugmansia flowers collected in a forest near Batu, East Java, Indonesia, on 28 Apr 2024. GPS -7.805005, 112.516905. Reference: Devi, et al. G3 (Bethesda). 2025 Aug 6;15(8):jkaf134. doi: 10.1093/g3journal/jkaf134. PMID: 40542721.

Caenorhabditis sp. 80 wild isolate. Male-female. Maintain at 20C or warmer. Elegans group. Isofemale line isolated from rotting wild Musa pseudostems collected in the forest on the road between Bromo and Malang, East Java, Indonesia, on 11 May 2024. GPS -7.99746, 112.87387. Reference: Devi, et al. G3 (Bethesda). 2025 Aug 6;15(8):jkaf134. doi: 10.1093/g3journal/jkaf134. PMID: 40542721.

Heterozygotes are WT and segregate WT, DpyUncs and Unc Steriles that are slightly Long. sb56 is a recessive zygotic suppressor of let-502(ca201) early larval lethality. Likely null of mel-11.

Dominant ts maternal-effect embryonic lethal. Embryos arrest prior to morphogenesis or at two-fold. Non-ts recessive mid-larval lethal. Maintain at 15C. Freezes poorly.

Dominant temperature sensitive maternal effect lethal. Will segregate some Vab. Maintain at 15C: about 30% of homozygotes hatch at 15C. Will not grow at 20C or 25C. Unc.

This strain can grow at 11.5C but is embryonic lethal at 15C and above. Temperature shifts in late embryogenesis or in larval stages result in defects in many asymmetric cell divisions in postembryonic develoment.

osEx211[apr-1::GFP + unc-76(+)]. This strain expresses functional APR-1::GFP driven by the apr-1 promoter. In the seam cells, just prior to the onset of mitosis, APR-1::GFP localizes to the anterior cortex.

osEx229 [pry-1::GFP + unc-76(+)]. This strain expresses functional pry-1::GFP driven by the pry-1 promoter. In the seam cells, just prior to the onset of mitosis, pry-1::GFP localizes to the anterior cortex.

osIs5 [scm::wrm-1::Venus + unc-76(+)]. WRM-1::GFP localizes to the anterior cortex in the seam cells prior to or during cell division, and to the posterior daughter's nucleus after cell division.

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

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

vpIs1 [elt-3::GFP + lin-15(+)] X. Heterozygotes are WT with pharyngeal GFP signal, and segregate WT GFP, arrested hT2 aneuploids, and non-GFP n3091 homozygotes (Sys Unc Psa). Homozygous hT2[bli-4 let-? qIs48] inviable. Pick WT GFP and check for correct segregation of progeny to maintain. Reference: Yamamoto Y, et al. PLoS Genet. 2011 Oct;7(10):e1002308.

Heterozygotes are WT with pharyngeal GFP. Segregates WT GFP+, Dpy GFP+ (mIn1 homozygotes) and few GFP- dsh-2(or302) mig-5(tm2639) homozygotes (Sys). Pick WT GFP+ animals and check for correct segregation of progeny to maintain.

vpIs1 [elt-3::GFP + lin-15(+)] X. Heterozygotes are WT with pharyngeal GFP signal, and segregate WT GFP, arrested nT1[qIs51] aneuploids, and non-GFP ok546 homozygotes (Unc Egl). Homozygous nT1[qIs51] inviable. Pick WT GFP and check for correct segregation of progeny to maintain. Reference: Yamamoto Y, et al. PLoS Genet. 2011 Oct;7(10):e1002308.

Heterozygotes are WT with pharyngeal GFP. Segregates WT GFP+, Dpy GFP+ (mIn1 homozygotes) and few GFP- dsh-2(or302) dsh-1(ok1445) homozygotes (Sys Unc). Pick WT GFP+ animals and check for correct segregation of progeny to maintain.

Heterozygotes are WT with pharyngeal GFP. Segregates WT GFP+, Dpy GFP+ (mIn1 homozygotes) and non-GFP triple homozygotes (mostly Emb with a few animals surviving to early L1). Pick WT GFP+ animals and check for correct segregation of progeny to maintain.

One or no gonad arm. Frequently ruptures at vulva.

osIs158 [eft-3p::TIR1(F79G)::mRuby] II. Single copy insertion into ttTi5605 on LG II. This strain expresses the improved version of TIR1 used for improved auxin-inducible degradation (AID2) technology. Reference: Negishi T, et al. Genetics. 2021 Dec 2;iyab218. doi: 10.1093/genetics/iyab218.

osIs158 [eft-3p::ccvTIR-1(F79G)::mRuby] single copy inserted into ttTi5605 on LG II. ieSi58 [eft-3p::AID*::GFP::unc-54 3'UTR + Cbr-unc-119(+)] IV. This strain expresses the improved version of TIR1 used for improved auxin-inducible degradation (AID2) technology. Reference: Negishi T, et al. Genetics. 2021 Dec 2;iyab218. doi: 10.1093/genetics/iyab218.

ieSi58 [eft-3p::AID*::GFP::unc-54 3'UTR + Cbr-unc-119(+)] IV. osIs182 [eft-3p::TIR1(F79G) + LoxP + myo-2p::GFP + rps-27p::neoR + LoxP] V. ieSi58 is a single copy transgene inserted into chromosome IV (oxTi177) expressing degron::GFP in the soma. osIs182 is a single copy insertion of TIR1(F79G) into chromosome V (oxTi365) and expresses the improved version of TIR1 used for improved auxin-inducible degradation (AID2) technology. Reference: Negishi T, et al. Genetics. 2021 Dec 2;iyab218. doi: 10.1093/genetics/iyab218.

Homozygous lethal deletion chromosome balanced by bli-4- and GFP-marked translocation. Heterozygotes are WT with pharyngeal GFP signal, and segregate WT GFP, arrested hT2 aneuploids, and non-GFP tm514 homozygotes (probable embryonic or early larval arrest). Homozygous hT2[bli-4 let-? qIs48] inviable. Note: qIs48 has been observed to recombine off hT2, typically leaving behind a functional homozygous viable hT2 with Bli-4 phenotype. Pick WT GFP and check for correct segregation of progeny to maintain.

Bacteria. Genotype: F-, mcrA, mcrB, IN(rrnD-rrnE)1, rnc14::Tn10(DE3 lysogen: lacUV5 promoter -T7 polymerase) (IPTG-inducible T7 polymerase) (RNAse III minus). This strain grows on LB or 2XYT plates. This strain is tetracycline resistant. Researchers using this strain should test for expression by transforming in one of the plasmids from the Fire Vector Kit (1999) (pLT76, e.g.) using standard CaCl2 transformation techniques. Biosafety Level: BSL-1.

Egg-laying (Egl) defects and subsequent internal hatching of progeny (Bagging) in > 95% of animals. xe11 is a C-to-U point mutation in each of the endogenous let-7 complementary sites, LCS1 and LCS2 [I:C9,335,211T & I:C9,335,260T]. xe11 is a weak gain-of-function allele: mutation of two functionally relevant let-7 binding sites impairs repression by let-7 causing over-expression of LIN-41 in L4 stage animals. Reference: Ecsedi M, et al. Dev Cell. 2015 Feb 9;32(3):335-44. Do not distribute this strain; other labs should request it directly 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.

Low penetrance Pvl (i.e., tagged protein appears not fully functional). CRISPR/Cas9-engineered allele adds GFP and 3xflag tag to LIN-29. Do not distribute this strain; other labs should request it directly 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. Reference: Aeschimann F, et al., Mol Cell. 2017 Feb 2;65(3):476-489.

Superficially wild-type. CRISPR/Cas9-engineered allele adds GFP and 3xflag tag to the N-terminus of LIN-29A. Do not distribute this strain; other labs should request it directly 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. Reference: Aeschimann F, et al., (2019). A single let-7 target to coordinate transition to adulthood. Life Science Alliance 2, e201900335. http://dx.doi.org/10.26508/lsa.201900335 )

Partially penetrant Pvl and Egl. xe40 specifically disrupts the LIN-29A isoform. The GFP tag was inserted at the shared C-terminus of LIN-29A/B in the xe40 background, so only the labeled B isoform is expressed. Do not distribute this strain; other labs should request it directly 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. Reference: Pereira et al., (2019) Timing mechanism of sexually dimorphic nervous system differentiation. eLIFE 8: e42078. https://doi.org/10.7554/eLife.42078

Pick GFP+ Egl to maintain. Segregates GFP- lin-41(xe8) homozygotes (die by vulval bursting as young adults), lin-41(xe8)/lin-41(bch28[eft-3p::gfp::h2b::tbb-2 3'UTR] xe70) heterozygotes (GFP+ Egl), and lin-41(bch28[eft-3p::gfp::h2b::tbb-2 3'UTR] xe70) (GFP+ Ste Dpy). lin-41(xe8) is a deletion of let-7 binding sites in the lin-41 3'UTR. The balancer was derived from lin-41(bch28), a lin-41(0) allele in which an expression cassette that drives ubiquitous nuclear GFP from the eft-3 promoter has been inserted into the lin-41 coding sequence (Katic et al., G3 (2015) 5:1649-56). References: Katic et al., G3 (2015) 5:1649-56 for lin-41(bch28) starting allele for balancer generation. Aeschimann F, et al. (2019). A single let-7 target to coordinate transition to adulthood. Life Science Alliance 2, e201900335. for balanced line. Do not distribute this strain; other labs should request it directly 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.

Temperature-sensitive embryonic lethal, maintain at 15C. Shift L4 hermaphrodites to 25C overnight for mutant embryos. Mutant embryos are sensitive to osmolarity and pressure. Previously called pod-4(or344).

Temperature-sensitive embryonic lethal, maintain at 15C. Shift L4 hermaphrodites to 25C overnight for mutant embryos. Mutant embryos are sensitive to osmolarity and pressure. Previously called pod-5(ye121).

Temperature-sensitive embryonic lethal, maintain at 15C. Shift L4 hermaphrodites to 24C overnight for mutant embryos. Mutant embryos are sensitive to osmolarity and pressure. Previously called pod-3 and mat-2.

Temperature-sensitive embryonic lethal, maintain at 15C. Shift L4 hermaphrodites to 25C overnight for mutant embryos. Mutant embryos are sensitive to osmolarity and pressure. Previously called pod-3 and mat-2..

Temperature-sensitive embryonic lethal, maintain at 15C. Shift L4 hermaphrodites to 25C overnight for mutant embryos. Mutant embryos are sensitive to osmolarity and pressure. Previously called pod-3 and mat-2.

Temperature-sensitive embryonic lethal, maintain at 15C. Shift L4 hermaphrodites to 25C overnight for mutant embryos. Mutant embryos are sensitive to osmolarity and pressure. Previously called pod-6(ye143).

muIs16 [mab-5::GFP]. Larval lethal at L3/L4 stage. Ectopic expression of GFP in the arrested sor-1 mutant homozygotes (L3 stage). NOTE: This allele is published as bp1, but has been curated in WormBase as bp_1 in order to differentiate it from the STS marker bP1.

muIs16 [mab-5::GFP]. Larval lethal at L3/L4 stage. Ectopic expression of GFP in the arrested sor-1 mutant homozygotes (L3 stage).

bpIs131 [sepa-1p::sepa-1::GFP + unc-76(+)]. Him. SEPA-1::GFP aggregates form in a temporal pattern. Diffuse SEPA-1::GFP is detectible in most cells at the comma stage and greatly diminished by the 2-fold stage. After hatching, cytoplasmic SEPA-1::GFP aggregates were found in a few unidentified cells in the head and tail regions and also in the intestine, especially in the anterior and posterior pairs of intestine cells. Reference: Tian Y, et al. Cell. 2010 Jun 11;141(6):1042-55.

bpIs37 [dcap-1p::dcap-1::DsRed + rol-6(su1006)]. Rollers. Translational DsRed reporter for the P body-specific marker dcap-1, which encodes the C. elegans ortholog of decapping complex component DCAP1. Low levels of expression are homogenously distributed in the cytoplasm at all stages of embryogenesis. Reference: Sun YY, et al. Protein Cell. 2011 Nov;2(11):918-39.

wIs51 [SCMp::GFP + unc-119(+)] V. GFP expression in seam cells. Temperature-sensitive: maintain at 20C or lower. bp323 mutants show reduced number of seam cells when raised at restrictive temperature (25C). Reference: Huang XX, et al. Dev Biol. 2009 Sep 15;333(2):337-47.

bxIs16 [cat-2::YFP + tph-1::CFP]. Temperature sensitive: lethal at 25C. Maintain at 20C.