Search Strains

bnIs1 [pie-1::GFP::pgl-1 + unc-119(+)]. GFP is brightest at 25C and the strain should be grown at that temperature. Routinely pick bright GFP+ worms to maintain. Because the transgene can become silenced, you should check the worms for GFP expression and freeze as soon as possible.

Maintain by picking GFP+ worms. deps-1 mutants are temperature-sensitive maternal-effect sterile (>80% sterile at 24.5C). Grow these balanced worms at 25C to verify that GFP+ worms are fertile and GFP- worms (deps-1 M+Z-) produce sterile progeny (M-Z-). It is best to keep deps-1 balanced because deps-1 M-Z- animals tend to lay many dead eggs and fewer eggs than WT at lower temps (15-20C).

Heterozygotes are wild-type with pharyngeal GFP signal, and segregate wild-type GFP, arrested nT1[qIs51] aneuploids, and non-GFP iow1 homozygotes (viable; see note below). Homozygous nT1[qIs51] inviable. Pick wild-type GFP and check for correct segregation of progeny to maintain. iow1 is a separation-of-function allele of mre-11. Homozygotes develop into adults wild-type in appearance, but laying dead eggs due to defects in meiotic DSB repair: mre-11(iow1) worms form meiotic DSBs but are impaired in their resection. Pick GFP+ to maintain (mre-11(iow1)/nT1[qIs51]) and GFP- to obtain homozygous mre-11(iow1) worms for analysis. Reference: Yin Y & Smolikove S. Mol Cell Biol. 2013 Jul;33(14):2732-47. doi: 10.1128/MCB.00055-13. Epub 2013 May 13. Erratum in: Mol Cell Biol. 2015 Jul;35(14):2568. PubMed PMID: 23671188; PubMed Central PMCID: PMC3700128.

Heterozygotes are wild-type with pharyngeal-expressed GFP, and segregate wild-type GFP+(pharynx) heterozygotes, arrested nT1[qIs51] homozygotes, and viable non-GFP(pharynx) rad-51(iow53[GFP::rad-51]) homozygotes. Balancer is prone to breaking down. If a population contains a mix of bright and dim GFP animals, pick dim GFP and check for correct segregation of progeny to maintain. iow53 inserted a GFP tag at the N-terminus of the endogenous rad-51 locus, but the tagged protein is not fully functional. non-GFP(pharynx) rad-51(iow53[GFP::rad-51]) homozygotes form GFP foci in the germline that are mostly spo-11 dependent, and GFP::rad-51 homozygotes have defects in unloading RAD-51. Created by CRISPR using pDD282, therefore may also contain 3XFLAG. Reference: Koury E, et al. Nucleic Acids Res. 2018 Jan 25;46(2):748-764.

Homozygous gfp and 3xflag C’ terminal tag inserting just before the STOP codon of mre-11. The strain is fertile and contains wild type germline (examined by DAPI). GFP is expressed in all germline nuclei. Maintain the strain by picking worms at 20C, no selection required. gfp::3xflag was added by CRISPR/Cas9 using pDD282-based vector. Reference: Reichman R, et al. Genetics. 2018 Apr;208(4):1421-1441.

Homozygous sterile double mutant balanced by bli-4- and GFP-marked translocation. Heterozygotes are wild-type with pharyngeal GFP signal, and segregate wild-type GFP heterozygotes, arrested hT2 aneuploids, and non-GFP ok1627 homozygotes. Homozygous hT2[bli-4 let-? qIs48] inviable. Pick wild-type GFP and check for correct segregation of progeny to maintain. rpa-4(iow24) deletion generated by CRISPR/Cas9 in the rpa-2(ok1627) mutant background. Reference: Hefel et al., Nucleic Acids Res. 2021 Jan 21;gkaa1293. doi: 10.1093/nar/gkaa1293.

N-terminal 3xFLAG tag inserted into the endogenous rpa-4 locus using Crispr/Cas9. Homozygous sterile deletion balanced by bli-4- and GFP-marked translocation. Heterozygotes are wild-type with pharyngeal GFP signal, and segregate wild-type GFP heterozygotes, arrested hT2 aneuploids, and non-GFP ok1627 homozygotes. Homozygous hT2[bli-4 let-? qIs48] inviable. Pick wild-type GFP and check for correct segregation of progeny to maintain. Generated in rpa-2(ok1627) background. Reference: Hefel et al., Nucleic Acids Res. 2021 Jan 21;gkaa1293. doi: 10.1093/nar/gkaa1293.

Homozygous lethal deletion chromosome balanced by GFP-marked translocation. Heterozygotes are WT with pharyngeal GFP signal, and segregate WT GFP, arrested nT1[qIs51] aneuploids, and non-GFP gk526 homozygotes (variable arrest, early larval). Homozygous nT1[qIs51] inviable. Pick WT GFP and check for correct segregation of progeny to maintain.

iowSi8 [pie-1p::GFP1-10::him-3 3’UTR + Cbr-unc119(+)] II. Germline-specific split-GFP construct. If germline silencing occurs, transgene expression can be recovered by growing worms at 25C for 2 generations. iowSi8 was generated by MosSCI insertion into Chr II ttTi5605 in parental strain EG6699. Reference: Hefel A & Smolikove S. G3. 2019 Jun 5;9(6):1933-1943. PMID: 30992318.

akir-1(iow88[GFP11::akir-1]) I. iowSi8[pie-1p::GFP1-10::him-3 3UTR + Cbr-unc119(+)] II. CRISPR/Cas9 insertion of GFP11 tag into endogenous akir-1 locus in background strain SSM471. GFP::AKIR-1 fluorescence only observed in the germline. If germline silencing occurs, transgene expression can be recovered by growing worms at 25C for 2 generations. Reference: Hefel A & Smolikove S. G3. 2019 Jun 5;9(6):1933-1943. PMID: 30992318.

rpa-1(iow89[GFP11::rpa-1]) II. iowSi8 [pie-1p::GFP1-10::him-3 3’UTR + Cbr-unc119(+)] II. CRISPR/Cas9 insertion of GFP11 tag into endogenous rpa-1 locus in background strain SSM471. GFP::RPA-1 fluorescence only observed in the germline. If germline silencing occurs, transgene expression can be recovered by growing worms at 25C for 2 generations. Reference: Hefel A & Smolikove S. G3. 2019 Jun 5;9(6):1933-1943. PMID: 30992318.

syp-4(iow90[GFP11::syp-4]) I. iowSi8[pie-1p::GFP1-10::him-3 3UTR + Cbr-unc119(+)] II. CRISPR/Cas9 insertion of GFP11 tag into endogenous syp-4 locus in background strain SSM471. GFP::SYP-4 fluorescence only observed in the germline. If germline silencing occurs, transgene expression can be recovered by growing worms at 25C for 2 generations. Reference: Hefel A & Smolikove S. G3. 2019 Jun 5;9(6):1933-1943. PMID: 30992318.

Heterozygotes are wild-type with pharyngeal-expressed GFP, and segregate wild-type GFP+(pharynx) heterozygotes, arrested nT1[qIs51] homozygotes, and viable non-GFP(pharynx) ubc-9(iow97[3xFLAG::ubc-9]) homozygotes. Maintain the strain by picking wild-type GFP+ worms and checking for correct segregation of progeny. iow97 was created by CRISPR/Cas9 insertion of a 3xflag tag at the N-terminus of the endogenous ubc-9 locus; however, the tagged protein is not fully functional. SSM491 is a replacement for SSM291: analysis shows that in all parameters tested, SSM491 is identical to SSM291, which was genetically unstable and prone to breaking down. Reference: Reichman R, et al. Genetics. 2018 Apr;208(4):1421-1441.

Crispr/Cas9-engineered indel in the 5’ region of rpa-1. Larval-lethal mutation balanced by GFP- and dpy-10-marked inversion. Heterozygotes are wild-type with relatively dim pharyngeal GFP signal, and segregate WT dim GFP, Dpy bright GFP (mIn1 homozygotes), and non-GFP iow117 homozygotes (larval lethal). Pick wild-type dim GFP and check for correct segregation of progeny to maintain. iow117 was generated in mre-11::GFP background and outcrossed to N2. Reference: Hefel et al., Nucleic Acids Res. 2021 Jan 21;gkaa1293. doi: 10.1093/nar/gkaa1293.

ssrIs919 [daf-7p::flp-7::mCherry]. ssrIs615 [unc-122p::GFP]. Strain can be used for FLP-7 peptide secretion assays. Reference: Palamiuc L,. et al. Nat Commun. 2017 Jan 27:8:14237. doi: 10.1038/ncomms14237. PMID: 28128367.

ssrIs1222 [hlh-11p::hlh-11::GFP]. ssrIs1031 [myo-2p::mCherry]. Translational hlh-11::GFP reporter. Reference: Littlejohn NK, et al. Elife 2020 Oct 20:9:e58815. doi: 10.7554/eLife.58815. PMID: 33078707.

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

ssrIs1240 [ges-1p(deltaB)::ins-7::mCherry]. ssrIs615 [unc-122p::GFP]. The INS-7::mCherry fusion protein localizes in GFP-labeled coelomocytes. ges-1p(deltaB) is an INT1-specific promoter. Reference: Liu CC, et al. Nat Commun. 2024 Aug 11;15(1):6869. doi: 10.1038/s41467-024-51077-3. PMID: 39127676.

ssrIs496 [atgl-1p::GFP + rol-6(su1006)]. Rollers. Transcriptional atgl-1::GFP reporter. Reference: Noble T, et al. Cell Metab. 2013 Nov 5;18(5):672-84. doi: 10.1016/j.cmet.2013.09.007. PMID: 24120942.

ncIs1 [eat-20::GFP + rol-6(su1006)]. Rollers.

ncIs2 [pH20::GFP + pBlueScript]. Heterozygotes are WT and segregate WT, BliEglUnc, and animals with muscle attachment defects and ventral cord displacement and detachment which arrest in larval development. Not well balanced. Neurons visualized with ncIs2.

ncIs2 [pH20::GFP + pBlueScript]. Heterozygotes are WT and segregate WT, Uncs, and animals with muscle attachment defects and ventral cord displacement and detachment which arrest in larval development. Not well balanced. Neurons visualized with ncIs2.

ncIs2 [pH20::GFP + pBlueScript]. Expresses GFP in nearly all neurons. No morphological or behavioral phenotypes.

ncIs2 [pH20::GFP + pBlueScript]. Heterozygotes are WT and segregate WT, SmaUnc, and animals with muscle attachment defects and ventral cord displacement and detachment which arrest in larval development or as embryos. Not well balanced. Neurons visualized with NcIs2.

ncIs2 [pH20::GFP + pBlueScript]. Heterozygotes are WT and segregate WT, DpyUnc, and animals with muscle attachment defects and ventral cord displacement and detachment which arrest in larval development or as embryos. Not well balanced. Neurons visualized with NcIs2.

ncIs2 [pH20::GFP + pBlueScript]. Heterozygotes are WT and segregate WT, DpyUnc, and animals with muscle attachment defects and ventral cord displacement and detachment which arrest in larval development or as embryos. Not well balanced. Neurons visualized with NcIs2.

ncEx2351 [unc-47p::Arch::eGFP + (pCFJ90) myo-2p::mCherry]. Pick GFP+ animals to maintain. Reference: Okazaki A, et al. PLoS One. 2012;7(5):e35370.

ncEx2365 [del-1p::Arch::eGFP + (pCFJ90) myo-2p::mCherry]. Pick GFP+ animals to maintain. Reference: Okazaki A, et al. PLoS One. 2012;7(5):e35370.

ncEx2371 [acr-5p::Arch::eGFP + (pCFJ90) myo-2p::mCherry]. Pick GFP+ animals to maintain. Reference: Okazaki A, et al. PLoS One. 2012;7(5):e35370.

ncIs3 [pH20::GFP + pBlueScript]. Expresses GFP in nearly all neurons. Heterozygotes are WT and segregate WT, DpyUncs, and animals with muscle attachment defects and ventral cord displacement and detachment which arrest in larval development.

ncIs2 [pH20::GFP + pBlueScript]. Heterozygotes are WT and segregate WT, DpyUnc, and animals with muscle attachment defects and ventral cord displacement and detachment which arrest in larval development. Not well balanced. Neurons visualized with ncIs2.

ncEx3003 [hsp16-2p::Arch::eGFP + rol-6(su1006)]. Pick Rollers to maintain. Reference: Okazaki A, et al. PLoS One. 2012;7(5):e35370.

ncEx3026 [aex-3p::Arch::eGFP + rol-6(su1006)]. Pick GFP+ animals to maintain. Reference: Okazaki A, et al. PLoS One. 2012;7(5):e35370.

ncEx3031 [myo-3p::Arch::eGFP + rol-6(su1006)]. Pick GFP+ animals to maintain. Reference: Okazaki A, et al. PLoS One. 2012;7(5):e35370.

ncEx3034 [F25B3.3p::Arch::eGFP + rol-6(su1006)]. Pick GFP+ animals to maintain. Reference: Okazaki A, et al. PLoS One. 2012;7(5):e35370.

ncEx3090 [tph-1p::Arch::eGFP + (pCFJ90) myo-2p::mCherry]. Pick GFP+mCherry+ animals to maintain. Reference: Okazaki A, et al. PLoS One. 2012;7(5):e35370.

ncIs2 [pH20::GFP + pBlueScript]. Heterozygotes are WT and segregate WT, DpyUncs, and animals with muscle attachment defects and ventral cord displacement and detachment which arrest as embyros or in larval development. Not well balanced. Neurons visualized with ncIs2.

ncIs3 [pH20::GFP + pBlueScript]. Expresses GFP in nearly all neurons. No morphological or behavioral phenotypes.

ncIs13 [ajm-1::GFP].

ncIs17 contains [hsp-16.2::eGFP + pBluscript]. Superficially wild-type.

hrtIs5 [gcy-5p::ebp-2::gfp + unc-119(+)] I. EBP-2::GFP expression in ASER. Reference: Harterink M, et al. J Cell Sci. 2018 Oct 22;131(20):jcs223107. PMID: 30254025.

hrtIs3 [des-2p::myr::GFP + unc-122p::DsRed]. hrtEx52 [des-2p::mKate::GS1(high) + unc-119(+) + myo-2p::tdTomato]. Pick tdTomato+ animals to maintain. Myristylated GFP marker for PVD. PVD development is quite strongly affected by high levels of actin-perturbing DeAct-GS1 expression in PVD and FLP. Phenotype is more severe than that of the low DeAct-GS1 expressing strain STR199, but weaker than that of the DeAct-SpvB expressing strain STR200. Reference: Harterink M, et al. J Cell Sci. 2018 Oct 22;131(20):jcs223107. PMID: 30254025.

wdIs51 [F49H12.4::GFP + unc-119(+)]; likely integrated in X. hrtEx53 [des-2p::mKate::GS1(low) + unc-119(+) + myo-2p::tdTomato]. Pick tdTomato+ animals to maintain. PVD development is somewhat affected by moderate levels of actin-perturbing DeAct-GS1 expression in PVD and FLP. Phenotype is less severe than that of the high DeAct-GS1 expressing strain STR198 and DeAct-SpvB expressing strain STR200. Reference: Harterink M, et al. J Cell Sci. 2018 Oct 22;131(20):jcs223107. PMID: 30254025.

hrtIs3 [des-2p::myr::GFP + unc-122p::DsRed]. hrtEx54 [des-2p::mKate::SpvB + unc-119(+) + lin-48p::tdTomato]. Pick animals with tdTomato expression in the tail to maintain. Myristylated GFP marker for PVD. PVD development is severely affected by low levels of actin-perturbing DeAct-SpvB expression in PVD and FLP. Phenotype is more severe than that of DeAct-GS1 expressing strains STR198 and STR199. Reference: Harterink M, et al. J Cell Sci. 2018 Oct 22;131(20):jcs223107. PMID: 30254025.

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.

hrtSi1 [mec-17p::ebp-2::gfp + unc-119(+)] I. hrtSi1 inserted into ttTi4348. GFP marker for microtubules. Reference: Harterink M, et al. J Cell Sci. 2018 Oct 22;131(20):jcs223107. PMID: 30254025.

hrtSi41 [des-2p::unc-33L::GFP + unc-119(+)] I. hrtSi41 inserted into ttTi4348. UNC-33L::GFP expression in PVD and FLP. Functional UNC-33::GFP fusion with internal GFP tag inserted at the start of the S isoform. Reference: He L, et al. eLife 2020;9:e55111 doi: 10.7554/eLife.55111.

C-terminal GFP tag inserted into endogenous unc-119 locus. Reference: He L, et al. eLife 2020;9:e55111 doi: 10.7554/eLife.55111.

hrtSi69 [des-2p::GFP::unc-33s + unc-119(+)] I. hrtSi69 inserted into ttTi4348. GFP::UNC-33S expression in PVD and FLP. Reference: He L, et al. eLife 2020;9:e55111 doi: 10.7554/eLife.55111.

hrtEx161 [des-2p::PA-GFP::tba-1 + des-2p::mKate2 + unc-119(+) + myo-2p::mCherry]. Pick mCherry+ animals to maintain array. PA-GFP::TBA-1 expression in PVD and FLP; fluorescence can be induced illumination by blue light. Reference: He L, et al. eLife 2020;9:e55111 doi: 10.7554/eLife.55111.