Search Strains

CRISPR/Cas9 engineered tagged endogenous locus. Reference: Reilly MB, et al. Widespread employment of conserved C. elegans homeobox genes in neuronal identity specification. bioRxiv 2022.04.29.490095; doi: https://doi.org/10.1101/2022.04.29.490095

Deletion of the Nuclear Localization Sequence (NLS; 220-235aa) in the endogenously-tagged ifet-1 locus; mMaple tag inserted at the C-terminus. No embryonic viability defect in hermaphrodites. Reference: Bhatia P, et al. Life Sci Alliance. 2025 May 29;8(8):e202503387. doi: 10.26508/lsa.202503387. PMID: 40441896.

CRISPR/Cas9-engineered deletion of Lectin domain within endogenously-tagged LAT-1A. Internal eGFP and FLAG tags with poly-A linkers inserted into endogenous lat-1 locus before 651 aa. Reduced brood size and high levels of embryonic and larval lethality. Reference: Carmona-Rosas G, et al. bioRxiv 2023.05.04.539414; doi: https://doi.org/10.1101/2023.05.04.539414.

sybIs62 [NISH-1::EGFP::3xFLAG + unc-119(+) + myo-2p::mCherry]. Transgene rescues nish-1(syb767) rilemenidine-induced longevity, rilemenidine-induced heat resistance, and rilemenidine-induced healthspan (body bends). Reference: Bennett DF, et al. Aging Cell. 2023 Feb;22(2):e13774. doi: 10.1111/acel.13774. PMID: 36670049.

ccIs55 [unc-54::lacZ + sup-7(st5)] V. Occasional bags and L1 lethality. ga89 is temperature sensitive. Maintain at 16C.

ccIs55 [unc-54::lacZ + sup-7(st5)] V. Unc - recessive kinker. Daf-c at 25C. Egl, Clumpy, Lon, low brood size. Dauers do not recover when moved to 15C in the presence of food. Daf-c, Lon, Clumpy, and fertility defects can be rescued maternally.

Temperature sensitive. Unc-difficulty in crawling backwards. Behavior phenotype more pronounced at 25C than at 16C or 20C. Trichlorfon resistant. This strain replaced strain DH401 because Mike Nonet tested DH401 and found it didn't contain cha-1, but did have an unc-11 mutation (5/97).

Mild (leaky) allele of cha-1. Has approximately 10% WT ChAT activity. Behaviorally normal-normal growth and development. Males mate. Sensitive to cholinesterase inhibitor aldicarb.

Completely deficient in Class C acetylcholinesterase activity. Behavior is completely normal.

Male-female strain. Gonochoristic. Grows well on OP50. Freezes well with C. elegans protocol. Isolated by Robin Giblin-Davis in October 1990 in Dade County, FL in the abdomen of an adult female of Metamasius hemipterus. Consult Walter Sudhaus or Robin Giblin-Davis for appropriate taxonomy before publication. Do not distribute this strain; other labs should request it from the CGC. sp. 3 in Kiontke and Sudhaus Wormbook Ecology chapter.

syIs9 [pJMGoQL + (pMH86) dpy-20(+)]. Phenotype of dominant activated Go alpha is lethargic and egg-laying defective - phenotype increases in severity as animal matures and ages. Animals frequently wander to the side of the plate. Animals move with decreased amplitude of sinusoidal waves. Dpy and WT revertants are frequent. Linkage unknown. Do not distribute this strain; other labs should request it from the CGC.

sy326 suppresses the sterility of n1058. Dpy.

Fertile Unc-38. sy326 has no phenotype on its own. Suppresses sterility of let-23(sy10) and lin-3(n1058). Sterile in double mutant combination with lfe-1 alleles. Do not distribute this strain; other labs should request it from the CGC.

Suppresses sterility of lin-3(n1058) and let-23(sy10). Not involved in vulva development. Synthetic sterile in combination with lfe-2(sy326). Previously called lfe-1. Do not distribute this strain; other labs should request it from the CGC.

Suppresses sterility of lin-3(n1058) and let-23(sy10). Not involved in vulva development. Synthetic sterile in combination with lfe-2(sy326). Previously called lfe-1. Do not distribute this strain; other labs should request it from the CGC.

Suppresses sterility of lin-3(n1058) and let-23(sy10). Not involved in vulva development. Synthetic sterile in combination with lfe-2(sy326). Previously called lfe-1. Do not distribute this strain; other labs should request it from the CGC.

Suppresses sterility of lin-3(n1058) and let-23(sy10). Not involved in vulva development. Synthetic sterile in combination with lfe-2(sy326). Previously called lfe-1. Do not distribute this strain; other labs should request it from the CGC.

Suppresses sterility of lin-3(n1058) and let-23(sy10). Not involved in vulva development. Synthetic sterile in combination with lfe-2(sy326). Previously called lfe-1. Do not distribute this strain; other labs should request it from the CGC.

Subtle ovulation defect which is viewable by Nomarski - 2 oocytes ovulate (pass into uterus) at the same time. Double mutants with lfe-2(sy326) and lfe-1(sy290) show sterility. Double mutant with lin-3(n1058) is fertile. Do not distribute this strain; other labs should request it from the CGC.

sy143 suppresses sy97 viability from 15% to 100%, P12 -> P11 transformations from 27% to 14% and Vul from 100% to 3%. Do not distribute this strain; other labs should request it from the CGC.

syIs528 [15xUAS::kin-2(G310D dominant negative)::let-858 3'UTR + ttx-3p::GFP + 1kb DNA ladder(NEB)] cGAL effector to lower PKA activity.

Bacteria. E. coli harboring the plasmid PB255, which uses the lin-31 promoter variant to express the lin-31::VP16 chimeric gene. It is particularly useful for the expression of heterologous genes in the vulval precursor cells. PB255 possesses three main components : an enhancer, a promoter region, a multi-cloning site (MCS), and a 3' UTR derived from the unc-54 gene. [CGC note: The plasmid in this strain was constructed from pBS II KS(+) and is likely Amp-R, but Amp-R has not been confirmed]. Biosafety Level: BSL-1.

Isolated at Devil's Lake State Park, Lincoln City, OR. Off a path about 200 feet from a dock in wet, organic topsoil in a forest.

Male-female strain. Low fecundity and fitness. PX356 is an inbred strain derived from EM464. Reference: Fierst JL, et al. PLoS Genet. 2015 Jun 26;11(6):e1005323. doi: 10.1371/journal.pgen.1005323. PMID: 26114425.

Male-female strain. Low fecundity and fitness. PX439 is an inbred derivative of isofemale line PB259 originally collected from a forest in Ohio (USA) by Scott Baird (Wright State University). Reference: Fierst JL, et al. PLoS Genet. 2015 Jun 26;11(6):e1005323. doi: 10.1371/journal.pgen.1005323. PMID: 26114425.

Male-female strain. Reference strain for the new chromosome-level assembly of the C. remanei genome. This is a natural isolate (BioProject PRJNA577507) inbred to reduce heterozygosity. Reference: https://www.biorxiv.org/content/10.1101/797035v1 (Accepted at Genetics).

Inbred strain with low fecundity and fitness. Originally collected in Wuhan, China. Reference: Adams PE, et al. Mol Biol Evol. 2023 Mar 4;40(3):msad039. doi: 10.1093/molbev/msad039. PMID: 36807460.

fxDf1 (II: 2,484,339 - 2,487,244) removes nspf-1, nspf-2, and nspf-3. Him. This strain carries a knockout of the Nematode-Specific Peptide family, group F (NSPF) gene family, which localizes to sperm membranous organelles. There are no effects on spermatogenesis, male fertility, or sperm competitive ability. Hermaphrodites produce approximately 30% males. Reference: Kasimatis KR, et al. (2018) BioRxiv 290221; doi: https://doi.org/10.1101/290221.

fxSi1 [pie-1p::TIR-1::mRuby::unc-54 3' UTR + loxP, I: 2851003] I. Degron tag was inserted into the endogenous spe-44 locus in the JU2526 wild isolate background, allowing auxin-inducible spermatogenesis arrest and reversible male sterility. Reference: Kasimatis, KR et al. (2020) Post-Insemination Selection Dominates Pre-Insemination Selection in Driving Male Competitive Ability. bioRxiv doi: https://doi.org/10.1101/2021.06.23.449605

fxIs1 [pie-1p::TIR1::mRuby, I:2851009] I. Auxin-inducible spermatogenesis arrest, resulting in hermaphrodite self-sterility. AID* tag was inserted into the endogenous spe-44 locus. Reference: Kasimatis KR, et al. (2018) Auxin-Mediated Sterility Induction System for Longevity and Mating Studies in Caenorhabditis elegans. BioRvix. doi: https://doi.org/10.1101/284232.

fxIs1 [pie-1p::TIR1::mRuby, I:2851009] I. Auxin-inducible spermatogenesis arrest, resulting in hermaphrodite self-sterility and reversible male sterility. Him: males produced at ~30%. AID* tag was inserted into the endogenous spe-44 locus. Reference: Kasimatis KR, et al. (2018) Auxin-Mediated Sterility Induction System for Longevity and Mating Studies in Caenorhabditis elegans. BioRvix. doi: https://doi.org/10.1101/284232.

fxSi3 [hsp-16.41p::PEEL-1::tbb-2 3' UTR + rpl-28p::mKate2::unc-54 3'UTR + rps-0p::HygR::unc-54 3' UTR, I:2851003] I. fxSi4 [hsp-16.41p::PEEL-1::tbb-2 3'UTR + loxP, II: 8420157] II. Heat-shock strain can be maintained at 20C without any issues. Degron tag was inserted into the endogenous spe-44 locus, allowing auxin-inducible spermatogenesis arrest and reversible male sterility. Heat-shock-induced expression of PEEL-1 will cause lethality in both sexes. Five generations of lab adaptation following genome editing, all in the CB4856 background. Reference: Kasimatis, KR et al. (2021) Post-Insemination Selection Dominates Pre-Insemination Selection in Driving Male Competitive Ability. bioRxiv doi: https://doi.org/10.1101/2021.06.23.449605

fxSi1 [pie-1p::TIR-1::mRuby::unc-54 3' UTR + loxP, I: 2851003] I. fxSi4 [hsp-16.41p::PEEL-1::tbb-2 3'UTR + loxP, II: 8420157] II. fxSi6 [hsp-16.41p::PEEL-1::tbb-2 3' UTR + rpl-28p::mKate2::unc-54 3'UTR + rps-0p::HygR::unc-54 3' UTR, III: 10158855] III. Heat-shock strain can be maintained at 20C without any issues. Degron tag was inserted into the endogenous spe-44 locus, allowing auxin-inducible spermatogenesis arrest and reversible male sterility. Heat-shock-induced expression of PEEL-1 will cause lethality in both sexes. fxSi4 was originally inserted in a CB4845 background, but has been sufficiently backcrossed so that PX658 is >98.5% JU2526 genetic background. Reference: Kasimatis, KR. et al. (2021) Post-Insemination Selection Dominates Pre-Insemination Selection in Driving Male Competitive Ability. bioRxiv doi: https://doi.org/10.1101/2021.06.23.449605

Slighty Dpy. Slighty Unc. Ventral clear patch due to distal tip cell migration defects. Ectopic expression of AWA neuronal markers.

kyIs104 [str-1::GFP]. AWB expression of GFP. mef-2 suppresses the phenotypes of kin-29 (small body size, hypersensitivity to dauer pheromone, reduced expression of the str-1 chemoreceptor in the AWB olfactory neurons). WT looking.

kyIs104 [str-1::GFP]. AWB expression of GFP. hda-4 suppresses the phenotypes of kin-29 (small body size, hypersensitivity to dauer pheromone, reduced expression of the str-1 chemoreceptor in the AWB olfactory neurons). WT looking.

kyIs104 [str-1::GFP]. AWB expression of GFP. mef-2 suppresses the phenotypes of kin-29 (small body size, hypersensitivity to dauer pheromone, reduced expression of the str-1 chemoreceptor in the AWB olfactory neurons). WT looking.

This double mutant strain has a severely deformed tail tip and is intolerant of cold (will not grow then die at 15°C) and of dietary saturated fatty acids. Its cell membranes are rigid and rich in saturated fatty acids, and the strain has a small brood size, slow locomotion, permeable cells, autophagy defects as well as other phenotypes. References: Svensson E, et al. PLoS ONE 6(6):e21343. PMID: 21712952. Devkota R, et al. Genetics (in press). Volume 219, Issue 1, September 2021. https://doi.org/10.1093/genetics/iyab093

This double mutant strain contains an excess polyunsaturated fatty acids in its cell membranes accompanied by excess lipid peroxidation, cell permeability, increased autophagy and other defects. The nhr-49(et8) C9873765T [WS200] mutation can be detected by PCR using the following primers: nhr-49 Fwd: 5’-CAGATTATGATTCGTGATGCTAGA-3; nhr-49 WT Rev: 5’-GAGATGAAAGATGTTGCTGTAGAG-3; nhr-49 Mut Rev: 5’-GAGATGAAAGATGTTGCTGTAGAA-3’. Annealing 65°C, expected products ~300 bp. The mdt-15(et14) C5832666T [WS200] mutation can be detected by PCR using the following primers: mdt-15(et14) Mut Fwd: 5’-GTGCCTCCAGATCCACAGCT-3’; mdt-15(et14) WT Fwd: 5’-GTGCCTCCAGATCCACAGCC-3’; mdt-15 Rev: 5’-CACCCATTGGAGCACCACT-3’. Annealing 65°C, expected product ~400 bp. Reference: Devkota R, et al. Genetics (in press). Volume 219, Issue 1, September 2021. https://doi.org/10.1093/genetics/iyab093

This triple mutant strain contains an excess polyunsaturated fatty acids in its cell membranes accompanied by excess lipid peroxidation, cell permeability, increased autophagy and other defects. The acs-13(et54) mutation (G125R) can be detected using PCR with the following primers: WT FWD: 5´CTA CCA GGG TGT TCG CCA TG 3; acs-13 mutant FWD: 5´CTA CCA GGG TGT TCG CCA TA 3; acs-13 REV: 5´TCA AAC TTG GGC ATT GCT CC 3´. Annealing 65°C, expected product 395 bp. The nhr-49(et8) C9873765T [WS200] mutation can be detected by PCR using the following primers: nhr-49 Fwd: 5’-CAGATTATGATTCGTGATGCTAGA-3; nhr-49 WT Rev: 5’-GAGATGAAAGATGTTGCTGTAGAG-3; nhr-49 Mut Rev: 5’-GAGATGAAAGATGTTGCTGTAGAA-3’. Annealing 65°C, expected products ~300 bp. The mdt-15(et14) C5832666T [WS200] mutation can be detected by PCR using the following primers: mdt-15(et14) Mut Fwd: 5’-GTGCCTCCAGATCCACAGCT-3’; mdt-15(et14) WT Fwd: 5’-GTGCCTCCAGATCCACAGCC-3’; mdt-15 Rev: 5’-CACCCATTGGAGCACCACT-3’. Annealing 65°C, expected product ~400 bp. Reference: Devkota R, et al. Genetics (in press). Volume 219, Issue 1, September 2021. https://doi.org/10.1093/genetics/iyab093

Increased lethality and male frequency. Synthetic lethal with helq-1(tm2134). Sensitive to camptothecin. Interacts with rip-1 and rfs-1. Reference: McClendon TB, et al. Genetics. 2016 May;203(1):133-45.

Gin is Glucose INtolerant. gin-1(cv10) is a Diet/nutrition-dependent maternal effect embryonic lethal. Lethality is significantly increased with growth on OP50 seeded on glucose supplemented plates. Grown on HB101, HT115 or fresh OP50 (seeded less than five days)

Mitani Laboratory allele. Gro, Maternal-effect, diet/nutrition-dependent embryonic lethal. Strain segregates near 100% lethality when grown on glucose, UV-treated OP50, older OP50, and DA837. Lethality is suppressed on fresh OP50 (less than 5 days from seeding), HB101, and HT115.

Maternal-effect, diet/nutrition-dependent embryonic lethal. Strain segregates increased embryonic lethality when grown on glucose, UV-treated OP50, older OP50, and DA837. Lethality is suppressed on fresh OP50 (less than 5 days from seeding), HB101, and HT115.

Gin is Glucose INtolerant. gin-2(cv11) is a Diet/nutrition-dependent maternal effect embryonic lethal. Lethality is significantly increased with growth on OP50 seeded on glucose supplemented plates. 20C, Grown on HB101, HT115 or fresh OP50 (seeded less than five days).

dvIs19 [(pAF15) gst-4p::GFP::NLS] III. Hypomorphic allele of skn-1 that may be propagated as a homozygote. High rate of embryonic lethality and slightly lower brood size compared to N2. Reference: Tang L, Dodd W, Choe K. G3 (Bethesda). 2015 Dec 29.

Hypomorphic allele of skn-1 that may be propagated as a homozygote. High rate of embryonic lethality and slightly lower brood size compared to N2. Reference: Tang L, Dodd W, Choe K. G3 (Bethesda). 2015 Dec 29.

rdEx1 [GFP::tra-1 + rol-6(su1006)]. Rollers. Array can cause sterility. Maintain by picking gravid Rollers. GFP::tra-1 fusion protein. Reference: Mathies LD, et al. Development. 2004 Sep;131(17):4333-43.

F58D5.1 Heterozygous. Homozygous lethal deletion chromosome balanced by GFP-marked translocation. Heterozygotes are wild-type with pharyngeal GFP signal, and segregate wild-type GFP+, arrested hT2 aneuploids, and non-GFP ok1278 homozygotes (larval arrest). Homozygous hT2[bli-4 let-? qIs48] inviable. Pick WT GFP and check for correct segregation of progeny to maintain. NOTE: (04/2019) RB1333 was originally described as a homozygous strain carrying an unknown GFP transgene in the background. It was recently reported by a user that the strain is heterozygous for ok1278. Their characterization of the strain found that the deletion is balanced by a GFP-marked balancer, most likely hT2[qIs48], though the identity of the balancer has not been molecularly confirmed. Outer Left Sequence: tccaaatcctgaaaatccca. Outer Right Sequence: cagatcccagttttgcgaat. Inner Left Sequence: ttgtgtgtgcgtccaatttt. Inner Right Sequence: acattccaacggacgtcttc. Inner Primer PCR Length: 3310. Estimated Deletion Size: about 1700 bp. Attribution: This strain was provided by the C. elegans Gene Knockout Project at the Oklahoma Medical Research Foundation, which was part of the International C. elegans Gene Knockout Consortium, which should be acknowledged in any publications resulting from its use. Paper_evidence WBPaper00041807

F43D9.5, F43D9.2. Superficially wild type. Attribution: This strain was provided by the C. elegans Reverse Genetics Core Facility at the University of British Columbia, which is part of the international C. elegans Gene Knockout Consortium, which should be acknowledged in any publications resulting from its use. Paper_evidence WBPaper00041807