pkIs1582 [let-858::GFP + rol-6(su1006)] V. Homozygous lethal lsm-8 deletion balanced by GFP-marked nT1 translocation. xe17 generated by CRISPR/Cas9-engineered replacement of the gene with a red pharyngeal marker. lsm-8 heterozygotes are wild-type (will roll in this case because of pkIs1582) green & red pharynx, and will segregate rolling heterozygotes (green & red pharynx), arrested nT1[qIs51] aneuploids (only green pharynx), and lsm-8 homozygotes (only red pharynx). Homozygous nT1[qIs51] inviable. Pick rollers with green & red pharynx and check for correct segregation of progeny to maintain. Reference: Mattout A, et al. Nat Cell Biol. 2020 May;22(5):579-590. PMID: 32251399

gwIs39 [baf-1::gfp-lacI::let-858 3'UTR + vit-5::GFP] III. bqSi225 [emr-1p::emr-1::mCherry + unc-119(+)] IV. gwIs59 [pha-4::mCherry::256xLacO::4xLexA + unc-119(+)]. Superficially wild-type. Express ubiquitous EMR-1::mCherry at the nuclear periphery. Expresses GFP-LacI from early embryogenesis and throughout development, which forms a small spot at the lacO array. Worms have red intestine (all stages) and green intestine (from late L4 stage). Reference: Harr JC, et al. Genes Dev. 2020 Apr 1;34(7-8):560-579. PMID: 32139421.

gwIs4 [myo-3p::RFP + baf-1::GFP-lacI:::let-858 3'UTR] X. Worms are slow growing, with reduced brood size and become sterile at elevated temperatures. Expresses GFP-LacI from early embryogenesis and throughout development, which forms a small spot at the lacO array. RFP expression in muscles. Reference: Gonzalez-Sandoval A, et al. Cell. 2015 Dec 3;163(6):1333-47. doi: 10.1016/j.cell.2015.10.066. PMID: 26607792.

gwIs39 [baf-1::gfp-lacI::let-858 3'UTR + vit-5::GFP] III. gwIs34 [myo-3::mCherry + 256xlacO + unc-119(+)] III. Superficially wild-type. Expresses GFP-LacI throughout development from early embryogenesis, forming a small spot at the lacO array. Worms have red muscle (from L1 stage) and green intestine (from late L4 stage). Reference: Meister P, et al. Genes Dev. 2010 Apr 15;24(8):766-82. PMID: 20395364

gwIs39 [baf-1::gfp-lacI::let-858 3'UTR + vit-5::GFP] III. gwIs58 [hsp-16.2p::mCherry::256xLacO::4xLexA + unc-119(+)]. Small transgene/large array. Superficially wild-type. Expresses GFP-LacI from early embryogenesis and throughout development, which forms a small spot at the lacO array. Worms have green intestine (from late L4 stage). Might still carry unc-119(ed3) in background. Reference: Rohner S, et al. J Cell Biol. 2013 Mar 4;200(5):589-604. doi: 10.1083/jcb.201207024. PMID: 23460676

gwIs39 [baf-1::gfp-lacI::let-858 3'UTR + vit-5::GFP] III. ygIs2 [baf-1::GFP::lmn-1(Y59C) + unc-119(+)]. caIs3 [pha-4::lacZ + rol-6(su1006)]. Rollers. Strain expressing low level of GFP::LMN-1 (carrying the Y59C mutation). Expresses GFP-LacI from early embryogenesis and throughout development, which forms a small spot at the lacO array. Worms have red muscle (from L1 stage) and green intestine (from late L4 stage). Reference: Mattout A, et al. Curr Biol. 2011 Oct 11;21(19):1603-14. doi: 10.1016/j.cub.2011.08.030. PMID: 21962710

gwIs39 [baf-1::gfp-lacI::let-858 3'UTR + vit-5::GFP] III. gwIs4 [baf-1p::GFP-lacI::let-858 3’UTR + myo-3p::RFP] X. Superficially wild-type. Expresses GFP-LacI throughout development from early embryogenesis, forming a large spot at the lacO array. Worms have red muscle (from L1 stage) and green intestine (from late L4 stage). Reference: Towbin BD, et al. Cell. 2012 Aug 31;150(5):934-47. PMID: 22939621

gwIs39 [baf-1::gfp-lacI::let-858 3'UTR + vit-5::GFP] III. gwIs58 [hsp-16.2p::mCherry::256xLacO::4xLexA + unc-119(+)]. Small transgene/large array. Slow growing and dumpy. Expresses GFP-LacI from early embryogenesis and throughout development, which forms a small spot at the lacO array. Worms have green intestine (from late L4 stage). Might still carry unc-119(ed3) in background. Reference: Rohner S, et al. J Cell Biol. 2013 Mar 4;200(5):589-604. doi: 10.1083/jcb.201207024. PMID: 23460676

gwIs4 [myo-3p::RFP + baf-1::GFP-lacI:::let-858 3'UTR] X. Worms are slow growing, with reduced brood size and become sterile at elevated temperatures. met-2 and set-25 mutants co-segregate with ~ 20cM distance. Expresses GFP-LacI from early embryogenesis and throughout development, which forms a small spot at the lacO array. RFP expression in muscles. Reference: Towbin BD, et al. Cell. 2012 Aug 31;150(5):934-47. PMID: 22939621

gwIs4 [myo-3p::RFP + baf-1::GFP-lacI:::let-858 3'UTR] X. [NOTE: transgene seems prone to silencing. Pick RFP+ to maintain.] Superficially wild-type. Expresses GFP-LacI from early embryogenesis and throughout development, which forms a small spot at the lacO array. RFP expression in muscles. Reference: Meister P, et al. Genes Dev. 2010 Apr 15;24(8):766-82. PMID: 20395364

gwIs39 [baf-1::gfp-lacI::let-858 3'UTR + vit-5::GFP] III. gwIs4 [baf-1p::GFP-lacI::let-858 3’UTR + myo-3p::RFP] X. Superficially wild-type. Expresses GFP-LacI throughout development from early embryogenesis, forming a large spot at the lacO array. Worms have red muscle (from L1 stage) and green intestine (from late L4 stage). Reference: Gonzalez-Sandoval A, et al. Cell. 2015 Dec 3;163(6):1333-47. PMID: 26607792

gwIs4 [myo-3p::RFP + baf-1::GFP-lacI:::let-858 3'UTR] X. Superficially wild-type. Expresses GFP-LacI from early embryogenesis and throughout development, which forms a small spot at the lacO array. Worms have red muscle (from L1 stage). Reference: Gonzalez-Sandoval A, et al. Cell. 2015 Dec 3;163(6):1333-47. doi: 10.1016/j.cell.2015.10.066. PMID: 26607792.

gwSi17 [cec?4p::cec?4::WmCherry::cec?4 3'UTR] II. gwIs4 [baf-1p::GFP-lacI::let-858 3’UTR + myo-3p::RFP] X. Worms are slow growing with reduced brood size and become sterile at elevated temperatures. Expresses GFP-LacI throughout development from early embryogenesis, forming a large spot at the lacO array. Worms have red muscle (from L1 stage). CEC-4::WmCherry is visible at the nuclear periphery in embryos and L1 stage animals. Reference: Cabianca DS, et al. Nature 2019 May;569(7758):734-739. PMID: 31118512

nuIs175 [myo-2p::RFP + unc-129p::RFP::snb-1] X. smn-1 heterozygotes are WT with pharyngeal GFP signal, and segregate WT GFP, arrested hT2 aneuploids, and non-GFP rt248 homozygotes (larval arrest). Homozygous hT2 [bli-4 let-? qIs48] inviable. Pick WT GFP and check for correct segregation of progeny to maintain. NOTE: myo-2p::RFP is not visible in this strain. rt248 is a 8 bp deletion in smn-1. [rt248: TTTTGATTAGC--------ATCCCAAAC] [wild-type: TTTTGATTAGCTCCGTATCATCCCAAAC] Reference: Dimitriadi M, et al. Proc Natl Acad Sci U S A. 2016 Jul 26;113(30):E4377-86. O'Hern PJ, et al. Elife. 2017 May 2;6. pii: e20752.

rtSi10 [smn-1p::smn-1 + Cbr-unc-119(+)] IV. nuIs175 [myo-2p::RFP + unc-129p::RFP::snb-1] X. rtSi10 transgene partially rescues smn-1(ok355): smn-1 homozygotes normally arrest as larvae, but somatic defects, including late larval lethality, are ameliorated by rtSi10. Sterility in smn-1(ok355) homozygotes is not rescued by rtSi10. Heterozygotes are WT with pharyngeal GFP signal, and segregate WT GFP, arrested hT2 aneuploids, and non-GFP ok355 homozygotes (sterile due to partial rescue by rtSi10). 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. Reference: O'Hern PJ, et al. eLife 2017;6:e20752 doi: 10.7554/eLife.20752

Heterozygtes are WT. Hets segregate WT, UncBli and DpyLet. ct42 homozygotes are inviable at all temperatures (recessive non-conditional larval lethal). ct42 is dominant temperature sensitive maternal effect lethal. ct42 hets give more inviable progeny at 25C than at 15C. dch-1 was previously called let-354(ct42).

Heterozygotes are WT and segregate WT, Dpy Mels and dead eggs.

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 ts maternal-effect embryonic lethal. Embryos show extensive cytoplasmic blebbing, often accompanied by small spindles and incomplete cytokinesis. Two cell embryos divide synchronously. Embryos arrest with eight to several hundred cells. Recessive non-ts maternal-effect embryonic lethal. Null may be WT. Maintain at 15C.

sbEx136 [(pAW33.1) let-502p::GFP + rol-6(su1006)]. pAW33.1 is about 6.6 kb BamH1 fragment from K06G1 and includes the first 12 amino acids of LET-502 clones into pPD95.67/BamH1. Should be nuclear localized, but is not nuclear localized. Maintain by picking Rollers.

Heterozygotes are green and segregate green WT, dead eggs and nonGreens that lay dead eggs with the defects in spindle organization, chromosome segregation, and cytokinesis.

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.

Segregates WT GFP+ heterozygotes, non-GFP Unc Sys, very rare GFP+ homozygous hT2, and dead eggs. Maintain by picking wild-type GFP+. Reference: Yamamoto et al. PLoS Genet. 2011 Oct;7(10):e1002308.

mig-1 confirmed by complementation tests, and cfz-2 by PCR. Segregates WT GFP+ heterozygotes, non-GFP Unc Sys, very rare GFP+ homozygous hT2, and dead eggs. Maintain by picking wild-type GFP+. Reference: Yamamoto et al. PLoS Genet. 2011 Oct;7(10):e1002308.

wIs51 [SCMp::GFP + unc-119(+)] V. GFP expression in seam cells. Heterozygotes are GFP+(pharynx) wild-type and segregate GFP+(pharynx) wild-type, GFP-(pharynx) Sys Psa Unc and dead eggs. PIck GFP+(pharynx) wild-type to maintain. Presence of cfz-2 was confirmed by PCR; mig-1 by complementation test. Reference: Yamamoto Y, et al. PLoS Genet. 2011 Oct;7(10):e1002308.

Heterozygotes are WT and GFP+. os37 homozygotes are Lvl and Psa. Pick GFP+ heterozygotes to maintain. qIs48 is an insertion of ccEx9747 with markers: myo-2::GFP expressed brightly in the pharynx throughout development, pes-10::GFP expressed in embryos, and a gut promoter driving GFP in the intestine, and is homozygous lethal. Reference: Shibata Y, et al. Dev Biol. 2012 Jan 15;361(2):349-57.

Heterozygotes are WT and GFP+. Segregate GFP- sterile Unc Psa (phasmid socket absent), very rare homozygous hT2 glowing animals, and dead eggs. ceh-20(os39) animals show defects in asymmetric T cell division.

Heterozygotes are WT GFP+ and segregate WT GFP+, Dpy GFP+ (mIn1 homozygotes), and os33 homozygotes (GFP-, Dpy, Muv, Steriles).

osEx108 [(pAY105) let-19::GFP + rol-6(su1006)]. Rollers. Pick rollers to maintain. Reference: Yoda et al. Development (2005) vol. 132 (8) pp. 1885-93.

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.

osEx138 [let-526::GFP + rol-6(su1006)]. Rollers. Pick rollers to maintain. GFP expression in most somatic nuclei. Reference: Shibata Y, et al. Dev Biol. 2012 Jan 15;361(2):349-57.

Heterozygotes are WT and GFP in the pharynx, and segregate WT GFP+, Sterile Psa(Phasmid socket absent) non-GFP homozygous os46) animals and dead eggs. Maintain by picking GFP progeny. Reference: Shibata et al. Development in press (2010).

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.

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 )

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.

mScarlet tag inserted into endogenous rack-1 locus. Ubiquitous mScarlet expression.

jcpEx2 [ced-1p::F58G11.6(genomic)::YFP::let-858 3'UTR + unc-119(+) + myo-2::GFP]. Maintain by picking GFP+. Individuals that lost the array produce only arrested embryos with spindle orientation defects, accumulate vesicles, and problems engulfing apoptotic corpses. Reference: Nieto C, et al. J Cell Sci. 2010 Jun 15;123(Pt 12):2001-7.

jcpEx3 [ccz-1p::ccz-1(genomic)::YFP::let-858 3'UTR + unc-119(+) + pha-1(+)]. Array rescues lethality. Individuals that lost the array produce only arrested embryos with spindle orientation defects, accumulate vesicles, and problems engulfing apoptotic corpses. Reference: Nieto C, et al. J Cell Sci. 2010 Jun 15;123(Pt 12):2001-7.

bmdSi15 [loxN + eef-1A.1p::GFP(1-10)::unc-54 3? UTR + let-858 terminator + myo-2p::mCherry::3xHA::tbb-2 3? UTR + loxP] I. bmdSi15 is a CRISPR-based integration into the ttTi4348 site (I:-5.32). Somatic expression of sfGFP(1-10) driven by the eft-3 promoter. GFP11 tag inserted into endogenous lmn-1 locus via CRISPR/Cas9 insertion into parental strain DQM104. Reference: Gregory EF, et al. MicroPubl Biol. 2023 Dec 13:2023:10.17912/micropub.biology.001022. doi: 10.17912/micropub.biology.001022. eCollection 2023. PMID: 38152058.

mScarlet::3xMyc tag inserted at the C-terminus of the endogenous nhr-23 locus by CRISPR. A flexible 30 amino acid linker is between the nhr-23 coding sequence and mScarlet. Allele obtained using the self-excising casstte, following Dickinson et al, 2015 method. Reference: Myles KM, et al. MicroPubl Biol. Oct 2:2023:10.17912/micropub.biology.000996. doi: 10.17912/micropub.biology.000996. eCollection 2023. PMID: 37854098.

linker::mScarlet::2xOLLAS::linker inserted at the C-terminus of the endogenous nas-37 locus by CRISPR using a Cas9 RNP. Allele obtained by replacing a modular mNeonGreen::3xFLAG cassette from wrd106.

linker::mScarlet::2xOLLAS::linker inserted at the C-terminus of the endogenous col-125 locus by CRISPR using a Cas9 RNP. Allele obtained by replacing a modular mNeonGreen::3xFLAG cassette from wrd300.

linker::mScarlet::2xOLLAS::linker inserted at the C-terminus of the endogenous col-103 locus by CRISPR using a Cas9 RNP. Allele obtained by replacing a modular mNeonGreen::3xFLAG cassette from wrd301.

linker::mScarlet::2xOLLAS::linker inserted at the C-terminus of the endogenous piit-1 locus by CRISPR using a Cas9 RNP. Allele obtained by replacing a modular mNeonGreen::3xFLAG cassette from wrd302.

linker::mScarlet::2xOLLAS::linker inserted at the C-terminus of the endogenous ctsa-1.1 locus by CRISPR using a Cas9 RNP. Allele obtained by replacing a modular mNeonGreen::3xFLAG cassette from wrd303.

linker::mScarlet::2xOLLAS::linker inserted at the C-terminus of the endogenous lon-8 locus by CRISPR using a Cas9 RNP. Allele obtained by replacing a modular mNeonGreen::3xFLAG cassette from wrd305.

mScarlet::2xOLLAS tag inserted at the C-terminus of the endogenous dpy-14 locus by CRISPR. Generated by replacing mNG::3xFLAG with mScarlet::2xOLLAS in parental strain JDW651.

30x linker::mScarlet(dpi)::10x linker tag inserted into the C-terminus of the endogenous dpy-13 locus by CRISPR using a Cas9 RNP. Derived by modification of syb3318[dpy-13::mNG] in parental strain PHX3318, replacing mNeonGreen with the mScarlet and linkers.