Search Strains

Caenorhabditis sp. 14 Male-female strain. Made by inbreeding EG5716 for 30 generations by picking a single L4 female and male at each generation.

Caenorhabditis sp. 19 Male-female strain. Isolated from a rotten fruit/seed of Ausubo (Manilkara dentata) collected by Susan Dalton in El Yunque, Puerto Rico, near El Verde (~18.3°N, 65.8°W), around March 28, 2010.

oxTi374 [unc-18(+) + ttTi5605 NeoR] V. oxEx1873 [Cbr-unc-119(+)]. Pick wild-type to maintain. oxTi374 is a Mini-Mos insertion of ttTi5605 MosSCI landing site in repressive region at position 3,339,184 of Chr V; can be used with standard ttTi5605 mosSCI targeting vectors. Animals carrying the array are wild-type and segregate Unc animals that can be used for MosSCI injections. This strain carries a rescuing unc-119(+) array for easier maintenance; inject Unc-119 animals that have lost the array. Reference: Froekjaer-Jensen et al. Cell (2016).

oxTi176 [unc-18(+) + ttTi5605 NeoR] V. oxEx1807 [Cbr-unc-119(+)]. Pick wild-type to maintain. oxTi176 is a Mini-Mos insertion of ttTi5605 MosSCI landing site in a generally permissive region at position 15,383,969 of Chr V; can be used with standard ttTi5605 mosSCI targeting vectors. Animals carrying the array are wild-type and segregate Unc animals that can be used for MosSCI injections. This strain carries a rescuing unc-119(+) array for easier maintenance; inject Unc-119 animals that have lost the array. Reference: Froekjaer-Jensen et al. Cell (2016).

oxTi173 [unc-18(+) + ttTi5605 NeoR] V. oxEx1795 [Cbr-unc-119(+)]. Pick wild-type to maintain. oxTi173 is a Mini-Mos insertion of ttTi5605 MosSCI landing site in a repressive region at position 17,523,246 of Chr V; can be used with standard ttTi5605 MosSCI targeting vectors. Animals carrying the array are wild-type and segregate Unc animals that can be used for MosSCI injections. This strain carries a rescuing unc-119(+) array for easier maintenance; inject Unc-119 animals that have lost the array. Reference: Froekjaer-Jensen et al. Cell (2016).

oxTi357 [unc-18(+) + ttTi5605 NeoR] V. oxEx1876 [Cbr-unc-119(+)]. Pick wild-type to maintain. oxTi357 is a Mini-Mos insertion of ttTi5605 mosSCI landing site in a repressive region at position 20,921,413 of Chr V; can be used with standard ttTi5605 MosSCI targeting vectors. Animals carrying the array are wild-type and segregate Unc animals that can be used for MosSCI injections. This strain carries a rescuing unc-119(+) array for easier maintenance; inject Unc-119 animals that have lost the array. Reference: Froekjaer-Jensen et al. Cell (2016).

oxSi1091 [mex-5p::Cas9 (+ smu-2 introns)::tbb-2 3'UTR + unc-119(+)] inserted into ttTi5605 II. Superficially wild-type. 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

oxTi1127 [mex-5p::Cas9(+smu-2 introns)::tbb-2 3'UTR + hsp-16.41p::Cre::tbb-2 3'UTR + myo-2p::2xNLS::cyOFP::let-858 3'UTR + lox2272] III. Inserted into F53A2.9. High Cas9 activity. Superficially wild-type. Cas9 insertion marked with myo-2p::cyOFP (cyan-excitable Orange Fluorescent Protein), a long-Stokes-shift fluorescent protein that is spectrally separable from common green and red fluorophores. 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

oxTi1128 [mex-5p::Cas9(+smu-2 introns)::tbb-2 3'UTR + hsp-16.41p::Cre::tbb-2 3'UTR + myo-2p::2xNLS::cyOFP::let-858 3'UTR + lox2272]) I. Outcrossed to remove unc-119 mutation. Superficially wild-type. Cas9 insertion marked with myo-2p::cyOFP (cyan-excitable Orange Fluorescent Protein), a long-Stokes-shift fluorescent protein that is spectrally separable from common green and red fluorophores. Inserted into W01A8.6. 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

egxSi116 [mex-5p::GFP::mex-5(F294N, F339N) + unc-119(+)] II. Modified MEX-5::GFP forms a much weaker gradient in the cytoplasm of the one-cell zygote than wild type. Reference: Han et al, Current Biology 2017.

egxSi100 [mex-5p::GFP::pos-1 + unc-119(+)] II. Single-copy transgene expressing GFP::POS-1 forms a weaker gradient in the cytoplasm of the one-cell zygote than in wild-type. Reference: Han et al, Current Biology 2017.

egxSi126 [mex-5p::hsp-3(aa1-19)::halotag::HDEL::pie-1 3’UTR + unc-119(+)] I. Superficially wild-type. Stable expression of Halotag in the ER lumen in the germline and embryos. Reference: Fan X, et al. G3 (accepted).

egxSi136 [mex-5p::tomm-20::halotag::pie-1 3’UTR + unc-119(+)] II. Superficially wild-type. Stable expression of TOMM-20 tagged with Halo on the outer membranes of mitochondria in the germline and embryos. Reference: Fan X, et al. G3 (accepted).

egxSi144 [mex-5p::cox-4::halotag::pie-1 3’UTR + unc-119 (+)] II. Superficially wild-type. Stable expression of COX-4 tagged with Halo in the mitochondrial matrix in the germline and embryos. Reference: Fan X, et al. G3 (accepted).

egxSi145 [mex-5p::hsp-3(aa1-19)::halotag::HDEL::pie-1 3’UTR + unc-119(+)] II. Superficially wild-type. Stable expression of Halotag in the ER lumen in the germline and embryos. Reference: Fan X, et al. G3 (accepted).

egxSi152 [mex-5p: tomm-20::gfp::pie-1 3’UTR + unc-119(+)] II. Superficially wild-type. Stable expression of TOMM-20 tagged with GFP on the outer membranes of mitochondria in the germline and embryos. Reference: Fan X, et al. G3 (accepted).

egxSi155 [mex-5p::tomm-20::mKate2::pie-1 3’UTR + unc-119(+)] II. Superficially wild-type. Stable expression of TOMM-20 tagged with mKate2 on the outer membranes of mitochondria in the germline and embryos. Reference: Fan X, et al. G3 (accepted).

egxSi157 [mex-5p::tomm-20::Dendra2::pie-1 3’UTR + unc-119(+)] II. Superficially wild-type. Stable expression of TOMM-20 tagged with photoconvertible Dendra2 on the outer membranes of mitochondria in the germline and embryos. Reference: Fan X, et al. G3 (accepted).

lwEx27 [inx-3::GFP]. inx-3(lw68) embryos display a wide range of developmental defects. All L1s that manage to hatch have a Pun (pharynx unattached) phenotype. inx-3::GFP transgene rescues lw68 to wild-type. Pick L2s or later to maintain. Reference: Starich, et al., 2003. Dev. Biol. 256:403.

Heterozygotes are superficially wildtype and express GFP in body wall muscle nuclei. They segregate sterile ekl-1(om83) homozygotes and unc-15(e73) ccIs4251 homozygotes that are severely uncoordinated and GFP+ in body wall muscle nuclei. Pick wild-type GFP+ and check for correct segregation of progeny. The ccIs4251 insertion carries [(pSAK2) myo-3p::GFP::LacZ::NLS + (pSAK4) myo-3p::mitochondrial GFP + dpy-20(+)]. Reference: She X, et al. PLoS Genet. 2009 Aug;5(8):e1000624. doi: 10.1371/journal.pgen.1000624. PMID: 19714217.

Pick wild-type GFP+ to maintain. Heterozygotes are wild-type GFP+ (pharynx), and segregate wild-type GFP+ heterozygotes, Dpy Sterile GFP+, and non-GFP om129 homozygotes (reduced fertility, maternal effect embryonic lethality, and high incidence of male offspring). om129 homozygote defects become more severe over successive generations and are more severe at 25C. om129 is a CRISPR-engineered deletion completely removing cid-1 and pup-2 loci. cid-1 also known as pup-1. nIs189 [myo-2::GFP] integrated in or near qC1. No recombination seen between nIs189 and qC1; fails to complement all markers on qC1. Reference: Yang B, et al. PLoS Genet. 2019 Feb 22;15(2):e1007992. doi: 10.1371/journal.pgen.1007992. PMID: 30794539. Superficially wildtype strain expresses GFP in the pharynx and segregates GFP+ dumpy sterile qC1 homozygotes and homozygous pup-1/-2(om129) animals that have reduced fertility and maternal effect embryonic lethality and are Him. Phenotype becomes more severe over successive generations and is more severe at 25°C. Reference: Li Y, et al. Development. 2018 Oct 10;145(19):dev165944. doi: 10.1242/dev.165944. PMID: 30305273.

Pick wild-type GFP+ to maintain. Heterozygotes are wild-type GFP+ (pharynx), and segregate wild-type GFP+ heterozygotes, Dpy Sterile GFP+, and non-GFP om138 homozygotes (reduced fertility, reduced embryonic viability and a high proportion of male offspring). om138 is a frameshift mutation. nIs189 [myo-2::GFP] integrated in or near qC1. No recombination seen between nIs189 and qC1; fails to complement all markers on qC1. Reference: Yang B, et al. PLoS Genet. 2019 Feb 22;15(2):e1007992. doi: 10.1371/journal.pgen.1007992. PMID: 30794539.

Pick wild-type GFP+ to maintain. Heterozygotes are wild-type GFP+ (pharynx), and segregate wild-type GFP+ heterozygotes, Dpy Sterile GFP+, and non-GFP non-GFP smrc-1(om138) met-2(n4256) homozygotes (reduced fertility, reduced embryonic lethality, and produce a high frequency of male offspring). These phenotypes are more severe at 25C, and at 25C the subsequent M-Z- generation produces essentially no viable embryos. The smrc-1(om138) allele was generated with CRISPR/Cas9 on the met-2(n4256) chromosome. nIs189 [myo-2::GFP] integrated in or near qC1. No recombination seen between nIs189 and qC1; fails to complement all markers on qC1. Reference: Yang B, et al. PLoS Genet. 2019 Feb 22;15(2):e1007992. doi: 10.1371/journal.pgen.1007992. PMID: 30794539.

Pick wild-type GFP+ to maintain. Heterozygotes are wild-type GFP+ (pharynx), and segregate wild-type GFP+ heterozygotes, Dpy Sterile GFP+, and non-GFP smrc-1(om138) met-2(om142) homozygotes (reduced fertility, reduced embryonic viability and high incidence of male offspring). Defects are more prominent in M-Z- animals at 25C. 3xFlag tag inserted at N-terminus of endogenous met-2 locus using Crispr/Cas9. nIs189 [myo-2::GFP] integrated in or near qC1. No recombination seen between nIs189 and qC1; fails to complement all markers on qC1. Reference: Yang B, et al. PLoS Genet. 2019 Feb 22;15(2):e1007992. doi: 10.1371/journal.pgen.1007992. PMID: 30794539.

Pick wild-type GFP+ to maintain. Heterozygotes are wild-type GFP+ (pharynx), and segregate wild-type GFP+ heterozygotes, Dpy Sterile GFP+, and non-GFP q136 homozygotes (reduced fertility, reduced embryonic viability, and increased frequency of male offspring). q136 is a nonsense mutation. nIs189 [myo-2::GFP] integrated in or near qC1. No recombination seen between nIs189 and qC1; fails to complement all markers on qC1. Reference: Yang B, et al. PLoS Genet. 2019 Feb 22;15(2):e1007992. doi: 10.1371/journal.pgen.1007992. PMID: 30794539.

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.

WT strain, Pellioditis pelhamensis. See WBG 12(5)14. Male/Female strain. Previously and incorrectly called Rhabditis maupasi by the CGC. Also previously called DF5039.

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.

WT strain, Pelodera teres. See WBG 12(5) 14. Male/Female strain. Previously called DF5016.

Full CRISPR deletion of rcs-1 via CRISPR in a dpy-10 background, outcrossed 3x to wild-type. Superficially wild-type. Reference: Panek J, et al. Proc Natl Acad Sci USA. .2020 Apr 7;117(14):7950-7960. doi: 10.1073/pnas.1918417117. PMID: 32193347.

Full CRISPR deletion of fbxa-75 via CRISPR in a dpy-10 background, outcrossed 3x to wild-type. Superficially wild-type. Reference: Panek J, et al. Proc Natl Acad Sci USA. .2020 Apr 7;117(14):7950-7960. doi: 10.1073/pnas.1918417117. PMID: 32193347.

Full CRISPR deletion of fbxa-158 via CRISPR in a dpy-10 background, outcrossed 3x to wild-type. Superficially wild-type. Reference: Panek J, et al. Proc Natl Acad Sci USA. .2020 Apr 7;117(14):7950-7960. doi: 10.1073/pnas.1918417117. PMID: 32193347.

This strain carries an engineered P55Q mutation in rpl-36A. Maintain at 16-20C. Superficially wild-type, confers resistance to Cycloheximide (CHX). Reference: Zhao Q, et al. Genetics. 2025 Sep 10:iyaf189. doi: 10.1093/genetics/iyaf189. PMID: 40929375.

fphEx1 [aak-2Cp::aak-2C::GFP + unc-119(+)]. Pick wild-type (non-Unc) to maintain. aak-2C isoform expressed from its own promoter in aak-2(ok524) background. Reference: Jeong JH, et al. Nat Commun. 2023 Jan 18;14(1):288. doi: 10.1038/s41467-023-35952-z. PMID: 36653384.

fphEx2 [aak-2A/Cp::aak-2A/C::GFP + unc-119(+)]. Pick wild-type (non-Unc) to maintain. aak-2A and aak-2C isoforms expressed from their own promoter in aak-2(ok524) background. Reference: Jeong JH, et al. Nat Commun. 2023 Jan 18;14(1):288. doi: 10.1038/s41467-023-35952-z. PMID: 36653384.

fphEx3 [aak-2Ap::aak-2C::GFP + unc-119(+)]. Pick wild-type (non-Unc) to maintain. aak-2c isoform expressed from the aak-2a promoter in aak-2(ok524) background. Reference: Jeong JH, et al. Nat Commun. 2023 Jan 18;14(1):288. doi: 10.1038/s41467-023-35952-z. PMID: 36653384.

fphEx4 [vha-6p::aak-2A::GFP + unc-119(+)]. Pick wild-type (non-Unc) to maintain. aak-2A isoform expressed from the intestinal vha-6 promoter in aak-2(ok524) background. Reference: Jeong JH, et al. Nat Commun. 2023 Jan 18;14(1):288. doi: 10.1038/s41467-023-35952-z. PMID: 36653384.

orIs19 [pie-1::GFP::dylt-1 + unc-119(+)]. Superficially wild-type. Reference: O'Rourke SM, et al. PLoS Genet. 2007 Aug;3(8):e128.

Heterozygotes are Unc and segregate Unc and wild type animals which give only dead progeny.

ltIs37 [pie-1p::mCherry::his-58 + unc-119(+)] IV. orIs13 [pie-1p::GFP::npp-22(genomic)::pie-1 3'UTR + unc-119(+)]. GFP-tagged NPP-22. Superficially wild-type. Might still carry unc-119(ed3) in background. [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: O'Rourke SM, et al. PLoS Genet. 2007 Aug;3(8):e128.

Heterozygotes are Unc and segregate Unc and wild type animals which give only dead progeny.

ruIs57 [pie-1p::GFP::tubulin + unc-119(+)]. Superficially wild-type. mKate2 was inserted into the C-terminus of ebp-2 endogenous locus. Reference: Sugioka K, et al. (2018) PNAS, Jan 30;115(5): E954-E963. (PubMed ID: 29348204)

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

umnIs32 [myo-2p::GFP + NeoR, II: 11755713 (intergenic)] II. or1985 is a CRISPR/Cas9 engineered deletion of zyg-9 removing the entire open reading frame. Heterozygotes are wild-type and GFP+ and segregate WT GFP+ (hets), or1948 homozygotes (GFP-, lay 100% dead embryos) and paralysed DpyUnc GFP+ (mnC1 homozygotes). Maintain by picking WT GFP+. Reference: Harvey AM, et al. PLoS Genet. 2023 Jan 6;19(1):e1010363. doi: 10.1371/journal.pgen.1010363. PMID: 36608115

Heterozygotes are Unc and segregate Unc and wild type animals which give only dead progeny.

Heterozygotes are wild-type and segregate wild-type (heterozygotes), Dpy, and sterile tm1296 homozygotes. Dev Biol. 2010 Aug 15;344(2):758-71.

Temperature-sensitve sterile. Maintain at 15-20C. Superficially wild-type at permissive temperatures; contains large bubble-like structures on the inside in all stages (described as large early endosomes), reduced brood size. Sterile and very sick at 25°C with some single escapers that are sterile and sick themselves. Suppressors have been observed after long culturing over several months, periodically check for sterility at 25C.

Superficially wild-type. Reference: Delaney K, et al. Genetics. 2018 Apr 10. pii: genetics.300909.2018. doi: 10.1534/genetics.118.300909. [Epub ahead of print].

Superficially wild-type. Null mutation: premature STOP codon and frame shift. Reference: Delaney K, et al. Genetics. 2018 Apr 10. pii: genetics.300909.2018. doi: 10.1534/genetics.118.300909. [Epub ahead of print].