rab-3(ftw74[rab-3::SL2::LoxP::GFP::dpy-10::LoxP(inv)]) II. Endogenous locus co-expresses GFP by trans-splicing using CRISPR-Cas9. Green fluorescence visible in neurons by dissection fluorescence microscopy. dpy-10 CRISPR/Cas9 entry site is located downstream of the GFP coding region. Inverted LoxP sites flank the GFP::dpy-10 insert. Please contact Ryan Littlefield prior to publishing work using this strain.

rab-3(ftw79[rab-3::SL2::LoxP::GFP::NLS::3'UTR::Abeta(inv)::sigPep(inv)::T2A(inv)::wrmScarlet11(inv)::LoxP(inv)]) II. Modified endogenous rab-3 locus co-expresses stochastic, switchable cassette by trans-splicing using CRISPR-Cas9. Green fluorescence visible in neurons by dissection fluorescence microscopy. Inverted LoxP sites flank the GFP-NLS and inverted wrmScarlet11::T2A::signalPeptide::Abeta insert. Please contact Ryan Littlefield prior to publishing work using this strain.

Heterozygotes are WT with pharyngeal GFP signal, and segregate WT GFP, arrested hT2 aneuploids, and non-GFP tm1508 ok1781 homozygotes (maternal sterile). Homozygous hT2[bli-4 let-? qIs48] inviable. Pick WT GFP and check for correct segregation of progeny to maintain. Reference: Parry JM, et al 2009 Current Biology 19(20):1752-7.

Homozygous lethal deletion 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 tm2429 homozygotes (embryonic lethal). Homozygous hT2[bli-4 let-? qIs48] inviable. Pick WT GFP+ and check for correct segregation of progeny to maintain. Reference: Jaramillo-Lambert A, et al. G3 (2015).

Homozygous lethal deletion 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 tm1761 homozygotes (embryonic lethal). Homozygous hT2[bli-4 let-? qIs48] inviable. Pick WT GFP+ and check for correct segregation of progeny to maintain. Reference: Jaramillo-Lambert A, et al. G3 (2015).

juIs76 [unc-25p::GFP + lin-15(+)] II.  Heterozygotes are wild-type with pharyngeal GFP signal, and segregate WT GFP, arrested nT1[qIs51] aneuploids, and non-pharyngeal GFP bec-1 homozygotes. Homozygous nT1[qIs51] inviable. Pick WT GFP and check for correct segregation of progeny to maintain.

Homozygous sterile mutation 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 sterile tm2223 homozygotes. Homozygous hT2[bli-4 let-? qIs48] inviable. Pick WT GFP and check for correct segregation of progeny to maintain. Reference: Furuta T, et al. Development. 2018 May 14;145(10). pii: dev161042. doi: 10.1242/dev.161042.

Heterozygotes are WT and GFP+. Segregate syp-3(me42) homozygotes that are non-GFP and lay mostly dead eggs; these mutants form abnormal synaptonemal complex formation during meiosis. Homozygous hT2[bli-4 let-? qIs48] animals are inviable.

krIs14 [hsp-16.48p::MosTransposase + lin-15B + unc-122p::GFP]. Heterozygotes are WT with GFP (GFP+ coelomocytes & GFP+ pharynx), and segregate WT GFP, arrested nT1[qIs51] aneuploids, and Dpy Unc homozygotes (GFP+ pharynx & GFP+ coelomocytes). Homozygous nT1[qIs51] inviable. Pick WT with GFP (GFP+ pharynx & GFP+ coelomocytes) and check for correct segregation of progeny to maintain. References: Robert V & Bessereau JL. EMBO J. 2007 Jan 10;26(1):170-83. doi: 10.1038/sj.emboj.7601463. PMID: 17159906. Rosu S, et al. Science. 2011 Dec 2;334(6060):1286-9. doi: 10.1126/science.1212424. PMID: 22144627. Toraason E, et al. Elife. 2024 Aug 8;13:e80687. doi: 10.7554/eLife.80687. PMID: 39115289.

meIs8 [pie-1p::GFP::cosa-1 + unc-119(+)] II. Transgene contains a combination of cDNA and genomic sequences of cosa-1 including 212 bp of 3'UTR. GFP is expressed in the adult germline as 6 bright foci per nucleus (one per chromosome pair) from late pachytene through diplotene stages. Homozygous sterile mutation balanced by GFP- and dpy-10-marked inversion. Heterozygotes are WT with relatively dim pharyngeal GFP signal, and segregate WT dim GFP, Dpy bright GFP (mIn1 homozygotes), and non-GFP me103 homozygotes (sterile adult). Pick WT dim GFP and check for correct segregation of progeny to maintain. nbs-1(me103) homozygotes have frayed and aggregated chromosomes at diakinesis of meiosis I. References: Girard C, et al. Proc Natl Acad Sci U S A. 2018 May 8;115(19):E4443-E4452. Yokoo R, et al. Cell. 2012 Mar 30;149(1):75-87.

Homozygous sterile mutation balanced by GFP- and dpy-10-marked inversion. Heterozygotes are WT with relatively dim pharyngeal GFP signal, and segregate WT dim GFP, Dpy bright GFP (mIn1 homozygotes), and non-GFP me103 homozygotes (sterile adult). Pick WT dim GFP and check for correct segregation of progeny to maintain. nbs-1(me103) homozygotes have frayed and aggregated chromosomes at diakinesis of meiosis I. Reference: Girard C, et al. Proc Natl Acad Sci U S A. 2018 May 8;115(19):E4443-E4452.

Homozygous viable mutation balanced by GFP- and dpy-10-marked inversion. Heterozygotes are wild-type with pharyngeal GFP signal, and segregate wild-type GFP+, Dpy bright GFP+ (mIn1 homozygotes), and non-GFP sbj3 homozygotes. Pick wild-type GFP+ to maintain. sbj3 homozygotes are morphologically wild-type but show reduction in viable progeny. Reference: Wolters S, et al. Genetics. 2014 Apr;196(4):985-99.

Homozygous viable mutation balanced by GFP- and dpy-10-marked inversion. Heterozygotes are wild-type with pharyngeal GFP signal, and segregate wild-type GFP+, Dpy bright GFP+ (mIn1 homozygotes), and non-GFP sbj3 homozygotes. Pick wild-type GFP+ to maintain. sbj3 homozygotes are morphologically wild-type but show reduction in viable progeny. Reference: Wolters S, et al. Genetics. 2014 Apr;196(4):985-99.

F28B12.3. Homozygous sterile deletion chromosome balanced by GFP- and dpy-10-marked inversion. Heterozygotes are WT with relatively dim pharyngeal GFP signal, and segregate WT dim GFP, Dpy bright GFP (mIn1 homozygotes), and non-GFP ok1181 homozygotes (sterile adult). Pick WT dim GFP and check for correct segregation of progeny to maintain. Klerkx et al, Dev Biol. 2009 335:12-21.

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 sterile homozygotes (produce only dead embryos). Homozygous hT2[bli-4 let-? qIs48] inviable. Pick WT GFP and check for correct segregation of progeny to maintain. Derived from strain XA3503. Reference: ima-2(ok256) is described in Askjaer et al., Mol Biol Cell. 2002 Dec;13(12):4355-70.

qaIs3502 [pie-1p::YFP::lmn-1 + pie-1p::CFP::H2B + unc-119(+)]. Germline expression of YFP::lmn-1. CFP::HIS is silenced in qaIs3502. 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 sterile homozygotes (produce only dead embryos). Homozygous hT2[bli-4 let-? qIs48] inviable. Pick WT GFP and check for correct segregation of progeny to maintain. Derived from strains XA3502 and XA3503. Reference: ima-2(ok256) is described in Askjaer et al., Mol Biol Cell. 2002 Dec;13(12):4355-70.

ojIs1 [pie-1p::GFP::tbb-2 + unc-119(+)]. qaIs3502 [pie-1p::YFP::lmn-1 + pie-1p::CFP::H2B + unc-119(+)]. Germline expression of YFP::lmn-1. CFP::HIS is silenced in qaIs3502. 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 sterile homozygotes (produce only dead embryos). Homozygous hT2[bli-4 let-? qIs48] inviable. Pick WT GFP and check for correct segregation of progeny to maintain. Derived from strains XA3502 and XA3503. Reference: ima-2(ok256) is described in Askjaer et al., Mol Biol Cell. 2002 Dec;13(12):4355-70.

Homozygous deletion chromosome balanced by GFP- and dpy-10-marked inversion. tm3039 homozygotes are viable but produce progengy that are primarily Lva or Lvl. Heterozygotes are WT with relatively dim pharyngeal GFP signal, and segregate WT dim GFP, Dpy bright GFP (mIn1 homozygotes), and non-GFP tm3039 homozygotes. Pick WT dim GFP and check for correct segregation of progeny to maintain. Reference: Rodenas E, et al. Mol Biol Cell. 2012 Mar;23(5):930-44.

vrIs13 [vrk-1p::VRK-1:GFP:VRK3UTR + unc-119(+)]. F28B12.3. Homozygous sterile deletion chromosome balanced by GFP- and dpy-10-marked inversion. Heterozygotes are WT with relatively dim pharyngeal GFP signal, and segregate WT dim GFP, Dpy bright GFP (mIn1 homozygotes), and non-GFP ok1181 homozygotes (sterile adult). Pick WT dim GFP and check for correct segregation of progeny to maintain. Klerkx et al, Dev Biol. 2009 335:12-21.

bqIs51 [pie-1p::GFP::npp-5 + unc-119(+)] IV. ltIs37 [pie-1p::mCherry::his-58 + unc-119(+)] IV. Expresses GFP::NPP-5 and mCherry in the germ line. Homozygous deletion chromosome balanced by GFP- and dpy-10-marked inversion. tm3039 homozygotes are viable but produce progengy that are primarily Lva or Lvl; bqIs51 transgene rescues the npp-5(tm3039) phenotype. Heterozygotes are WT with relatively dim pharyngeal GFP signal, and segregate WT dim GFP, Dpy bright GFP (mIn1 homozygotes), and non-GFP tm3039 homozygotes. Pick WT with dim GFP in the pharynx and check for correct segregation of progeny to maintain. Reference: Rodenas E, et al. Mol Biol Cell. 2012 Mar;23(5):930-44.

Homozygous deletion chromosome balanced by GFP- and dpy-10-marked inversion. ok1966 homozygotes are viable but produce progengy that are primarily Lva or Lvl. Heterozygotes are WT with relatively dim pharyngeal GFP signal, and segregate WT dim GFP, Dpy bright GFP (mIn1 homozygotes), and non-GFP tm3039 homozygotes. Pick WT dim GFP and check for correct segregation of progeny to maintain. Reference: Rodenas E, et al. Mol Biol Cell. 2012 Mar;23(5):930-44.

Homozygous sterile mutation balanced by GFP- and dpy-10-marked inversion. Heterozygotes are WT with relatively dim pharyngeal GFP signal, and segregate WT dim GFP, Dpy bright GFP (mIn1 homozygotes), and few GFP- tm2214 homozygotes animals which give very small brood size and hence can only be slowly propagated (see BP600 for detailed description for homozygote tm2214 phenotypes). Pick WT dim GFP and check for correct segregation of progeny to maintain.

antIs30 [attP-f + Cbr-unc-119(+) + glh-2p::phiC31 + rol-6(partial) + myo-2p::GFP + attP-r] II. antIs30 was inserted into ttTi5605 on LG II using MosSCI. GFP expression in pharynx is very weak (as it is single copy) and is easiest to see during the L1-L3 stages. This strain contains a phiC31 docking site and can be used for precise single-copy integration of transgenes via recombination mediated cassette exchange. The docking site contains inverted phiC31-attP sites flanking phiC31 integrase expressed from the glh-2 germline promoter. Integration constructs need to have inverted phiC31-attB sites that flank the intended sequence to be inserted. Reference: Yang FJ, et al. "phiC31 integrase for recombination mediated single copy insertion and genome manipulation in C. elegans." Genetics 2021.

antIs31 [attP-f + Cbr-unc-119(ant40) + glh-2p::phiC31 + rol-6(partial) + myo-2p::GFP + attP-r] II. Unc. antIS31 has been found to self-excise; check for GFP expression periodically to retain the insertion. GFP expression in pharynx is very weak (as it is in single copy) and is easiest to see during the L1-L3 stages. This strain contains a phiC31 docking site and can be used for precise single-copy integration of transgenes via recombination mediated cassette exchange. The docking site contains inverted phiC31-attP sites flanking phiC31 integrase expressed from the glh-2 germline promoter. Integration constructs need to have inverted phiC31-attB sites that flank the intended sequence to be inserted. antIs31 was derived by CRISPR/Cas9 knockout of Cbr-unc-119 in antIs30 creating ant40, a 691 bp deletion in Cbr-unc-119. Because antIs31 does not rescue unc-119(ed3), BRC566 facilitates the use of Unc-119 rescue as a selection marker for transgene insertions. Reference: Yang FJ, et al. "phiC31 integrase for recombination mediated single copy insertion and genome manipulation in C. elegans." Genetics 2021.

Homozygous sterile 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 ok308 homozygotes (mostly sterile or Mel, but can be slowly propagated at 20C). Pick WT dim GFP and check for correct segregation of progeny to maintain.

Homozygous sterile 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 nos-2 nos-1 homozygotes (segregate many dead embryos). Pick wild-type dim GFP and check for correct segregation of progeny to maintain. Reference: Hansen D, et al. Development. 2004 Jan;131(1):93-104.

Homozygous sterile mutation 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 sterile oz273 homozygotes. Homozygous hT2[bli-4 let-? qIs48] inviable. Pick WT GFP and check for correct segregation of progeny to maintain.

glp-1(oz264) is a gain-of-function allele. Homozygous sterile mutation 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 sterile oz273; oz264 homozygotes. Homozygous hT2[bli-4 let-? qIs48] inviable. Pick WT GFP and check for correct segregation of progeny to maintain.

Heterozygotes are Unc and segregate Uncs, dead eggs, and non-Uncs (dsb-1 homozygotes), which produce 99% inviable embryos due to meiotic nondisjunction. Pick Unc to maintain and check for correct segregation of progeny. we11 is a TCA to TAA nonsense mutation in the dsb-1 coding sequence that introduces a premature stop after leucine 96. Reference: Stamper EL, et al. PLoS Genet. 2013;9(8):e1003679.

mIs11 [myo-2p::GFP + pes-10p::GFP + F22B7.9::GFP]. Heterozygotes are wild-type with dim GFP signal in the pharynx. mIs11 homozygotes are wild-type with bright GFP in the pharynx. ieDf2 homozygotes (non-GFP) develop normally but produce 97.5% inviable embryos and a high frequency of males among the surviving self-progeny. Pick WT with dim GFP+ in pharynx to maintain. mIs11 homozygotes will quickly overtake the population if not selected against. GFP expression in 4-cell embryos, pharyngeal muscle and gut. ieDf2 is a deficiency of zim-1, zim-2, zim-3, and him-8 generated by MosDel, resulting in single-copy insertion of a copy of the C. briggsae unc-119 gene on Chromosome IV. The deletion spans the sequences from the beginning of the zim-1 coding sequence through the ttTi22866 Mos1 insertion site.

Faint or invisible alae in L1. Segregates males.

Temperature sensitive lethal: inviable at 25C, grows at 20C and 15C. Somewhat sickly. Small brood sizes. At 25C homozygotes have a starved translucent appearance, facilitating Nomarski visualization of neuron processes.

Variably Dpy, slow growing. Inviable on MYOB medium.

Dpy. Severe. Semidominant. Inviable at 15C.

Severe roundheaded Dpy. Almost inviable at 15C.

dpy-26(n199) is XO viable, XX lethal. eDp26 is a duplication of the left end of X, attached to X in an inverted orientation. Strain gives non-Dpy Egl hermaphrodites, intersexes, males and dead eggs.

eDp26 is a duplication of the left end of X, attached to X in an inverted orientation. CB4950 is homozygous for eDp26, which is XX viable and XO lethal. XX hermaphrodites are slightly small and slightly Egl.

At 20C or 25C heterozygotes are semi-Dpy and segregate semi-Dpys (heterozygotes), Dpys (dpy-25/dpy-25) and animals which arrest as Dpyish young larvae (let-552/let-552). Maintain by picking semi-Dpy. At 15C it is difficult to distinguish between let-552 homozygotes and dpy-25 homozygotes (e817 is inviable at 15C).

Obligate XO male/female strain, propagate by crossing. Low fertility. Fertile XO females and XO males; inviable XX embryos and larvae. Reference: Strain 7 Hodgkin (2002) PMID: 12399387.

Vab XX hermaphrodites and XO males, viable at all temperatures. Adult hermaphrodite tail spike is invariably shortened and/or vacuolated, often also abnormal in larvae. Possible excretory cell abnormalities. Rays of adult male tail variably abnormal, other structures normal; males can mate.

eEx541 [bus-8(+) + sur-5p::GFP]. Pick GFP+ to maintain. Nearly inviable, severely dumpy bus-8 mutant rescued by array. Reference: Partridge et al. (2008) PMID: 18395708.

Homozygous viable dpy. dpy-31(e2919) homozygotes are almost inviable, but lethality is efficiently suppressed by sqt-3(e2906). Reference: Novelli J, et al., Genetics. 2004 Nov;168(3):1259-73.

Squat, dumpy at 15C. Inviable at higher temperatures. Deletion of most of sqt-3 coding sequence. Null by antibody staining.

Maintain at 15C. Small, sluggish, slow-growing fragile hermaphrodites. Almost inviable above 20C. Reference: Novelli et al. (2009) PMID: 19751718.

Most L1 larvae are deformed with irregular shapes. Older larvae and adults exhibit variably bent-head. Resembles spon-1(e2623) II. Homozygous viable, but inviable as hemizygotes (e1210/maDf2). Reference: Hodgkin (unpublished).

Homozygous viable mutation balanced by GFP- and dpy-10-marked inversion. Heterozygotes are WT with relatively dim pharyngeal GFP signal, and segregate WT dim GFP, Dpy bright GFP (mIn1 homozygotes), and non-GFP cer140 gk401 homozygotes (synthetic sterile). Pick WT dim GFP and check for correct segregation of progeny to maintain. Generated by CRISPR-mediated deletion of ubh-4 in gk401 mutant background. Reference: Martinez-Fernandez C, et al. Cells. 2023 Mar 18;12(6):929. doi: 10.3390/cells12060929. PMID: 36980270

umnIs78 [myo-2p::mKate2 + NeoR, I: 12541645 (intergenic)] I. Superficially wild-type. Crossover suppressor for LGI right. Inversion includes unc-75 and unc-54. Derived by insertion of myo-2p::mKate2 transgene into hIn1 inversion in parental strain KR1949 using CRISPR/Cas9.

This strain is difficult and time consuming to maintain. Gives relatively few heterozygotes. Homozygous lethal mutation balanced by Dpy- and myo-2p::Venus-marked inversion. Heterozygotes are paralyzed Unc and Egl with relatively dim pharyngeal GFP (Venus) expression. Heterozygotes segregate heterozygous non-Dpy GFP+ paralyzed Unc and Egl, non-GFP embryonic lethal (homozygous n499), and Dpy with brighter GFP+ (tmC20 homozygous). Remove Dpy from plate to prevent them from taking over. Heterozygotes tend to stack up in parallel clumps. Populations can be enriched by transferring these clumps to new plates and allowing Dpy (tmC20 homozygotes) to crawl out into bacterial lawn, and then picking away Dpy or transferring the clump of Hets to another plate. Derived by balancing n499 from parental strain MT1102 over tmC20 from FX30179.

umnIs64 [myo-2p::GFP + NeoR, II:12833878 (intergenic)] II. tmIn8 is a CRISPR/Cas9-induced inversion between F13D12.6 and cup-14 in LG II covering region (Mb) 2.1 (11.7..13.9). Derived by insertion of myo-2p::GFP transgene into parental strain FX19134 using CRISPR/Cas9.

umnIs75 [myo-2p::GFP + NeoR, I: 12541645 (intergenic)] I. Superficially wild-type. Crossover suppressor for LGI right. Inversion includes unc-75 and unc-54. Derived by insertion of myo-2p::GFP transgene into hIn1 inversion in parental strain KR1949 using CRISPR/Cas9.