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

Weak dumpy. Variable tail abnormal at 20C or higher. Cold-sensitive: most arrest as pretzel-stage embryos, with some escapers arresting as severely distorted L1 larvae at 15. Unusual missense allele (K280E) of sqt-3, cold-sensitive lethal and suppressor of dpy-31 lethality. Reference: Novelli et al. (2006) PMID: 16452136.

muEx248 [(pNL209) daf-16::GFP::daf-16(cDNA) + podr-1::RFP]. Pick green (body) / red (head neurons) animals. Transmission efficiency ~50%. Can be grown at 20C with some sterility (30-50%). The higher the temperture, the greater the sterility.

dvIs14 [(pCL12) unc-54::beta 1-42 + (pCL26) mtl-2::GFP]. mtl-2::GFP produces strong constitutive intestinal expression of GFP at all developmental stages. Expresses human AB peptide and accumulates B-amyloid fibrils. AB toxicity enhanced at higher temperatures.

dvIs37 [myo-3p::GFP::A-Beta (3-42) + rol-6(su1006)]. Maintain at 16C. Roller. Diffuse and aggregated GFP expression in body wall muscle. Low brood size. Sicker at higher temperatures (e.g. 25C). Reference: Link CD, et al. (2008) Neurobiology of Disease,32(3):420-5.

dvIs62 [snb-1p::hTDP-43/3' long UTR + mtl-2p::GFP] X. Temperature-sensitive. Maintain at 16 to minimize selection against transgene. Uncoordinated from hatching; phenotype is stronger at higher temperatures. Intestinal GFP expression. Reference: Ash PE, et al. Hum Mol Genet. 2010 Aug 15;19(16):3206-18.

nmIs7 [Cni-mss-1(+) + Cni-mss-2(+) + Cbr-myo-2::GFP + unc-119(+)]. Insertion site of transgene is not known, but it is not in LG III or X. Males with this transgene are more competitive in siring progeny; also a higher ratio of males in the population. Derived from parental strain CP99, which in turn was derived from AF16. Reference: Yin D, et al. Science. 2018 Jan 5;359(6371):55-61.

Highly resistant to ivermectin. This strain cannot be sent to commercial recipients without approval from UT Southwestern. Do not distribute this strain; other labs should request it from the CGC. Received new stock 5/21/08. [NOTE: The correct genotype of this strain is avr-14(ad1305) I; avr-15(vu227) glc-1(pk54) V. This strain was incorrectly annotated as avr-14(ad1302) I; avr-15(ad1051) glc-1(pk54) V. when submitted to the CGC.]

WT gross phenotype, with GFP semi-dominantly expressed in 4-60 cell embyros, pharyngeal muscle and gut. Segregates WT, brighter Dpy GFP mIn1 homozygotes and non-GFP bli-2 unc-4 homozygotes. Pharyngeal and gut GFP is easily seen in a UV dissecting microscope; early embryonic signal requires higher magnification. mIs14 occasionally crosses off mIn1[dpy-10], apparently by double recombination. Pick WT, check for GFP and check for correct segregation of progeny to maintain. mIs14 is ccEx9747 integrated into mIn1[dpy-10]. This is a three-construct element containing myo-2 and pes-10 promoters and a gut enhancer fused individually to GFP coding sequence.

oxTi302 [eft-3p::mCherry::tbb-2 3'UTR + Cbr-unc-119(+)]; inserted in Chr. I: 10,166,145. oxTi75 [eft-3p::GFP::H2B::tbb-2 3'UTR + unc-18(+)] II; inserted in Chr. II: 5,448,544. oxTi411 [eft-3p::tdTomato::H2B::unc-54 3'UTR + Cbr-unc-119(+)] inserted in Chr. III: 6,076,837. Him. Somewhat sick at higher temperatures. Maintain at 20C or below. This mapping strain uses three dominant fluorescent insertions that can be distinguished when scoring segregation. Please see www.wormbuilder.org for additional strain information.

oxTi76 [eft-3p::GFP::H2B::tbb-2 3'UTR + unc-18(+)]; inserted in Chr. IV: 11,899,008. oxTi405 [eft-3p::tdTomato::H2B::unc-54 3'UTR + Cbr-unc-119(+)]; inserted in Chr. V: 15,838,568. oxTi421 [eft-3p::mCherry::tbb-2 3'UTR] inserted in Chr. X: 6,180,397. Him. Somewhat sick at higher temperatures. Maintain at 20C or below. This mapping strain uses three dominant fluorescent insertions that can be distinguished when scoring segregation. Please see www.wormbuilder.org for additional strain information.

Unc. Fertile with viable progeny at or below 20C. Glp-1 sterile at higher temperatures. No obvious visible phenotype associated with sog-3.

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

or131 mutant embyros have a highly penetrant mom-like defect with mutant embryos lacking gut and making extra pharyngeal tissue at 25C. Maintain at 15C.

Maintain at 15C. Temperature-sensitive embryonic-lethal at restrictive temperature of 26C. Viable embryos at permissive temperature of 15C. Mitotic spindle in one-cell stage embryo assembles normally, but microtubules destabilize at anaphase and spindle becomes mis-positioned toward the posterior pole leading to highly abnormal cleavage and chromosome segregation defects. References: Gonczy P, et al. Dev Cell. 2001 Sep;1(3):363-75. Bellanger JM, et al. J Cell Sci. 2007 Aug 15;120(Pt 16):2963-73.

fnEx4 [unc-85::GFP + rol-6(su1006)]. Rollers. GFP highly expressed in embryos, VPNs in L1, Intestine in L2, VPNs in L3-L4. Maintain by picking GFP+ rollers. Reference: Grigsby IF & Finger FP. (2008) Dev Biol 319(1):100-9.

rtEx233 [nlp-11p::GFP + lin-15(+)]. Raise at 20C or higher and pick non-Muv to maintain array.

rtEx234 [nlp-13p::GFP + lin-15(+)]. Raise at 20C or higher and pick non-Muv or GFP+ to maintain array.

rtEx247 [nlp-14p::GFP + lin-15(+)]. Raise at 20C or higher and pick non-Muv to maintain array.

rtEx251 [nlp-15p::GFP + lin-15(+)]. Raise at 20C or higher and pick non-Muv to maintain array.

rtEx256 [nlp-18p::GFP + lin-15(+)]. Raise at 20C or higher and pick non-Muv to maintain array.

rtEx260 [nlp-19p::GFP + lin-15(+)]. Raise at 20C or higher and pick non-Muv to maintain array.

rtEx330 [nlp-21p::GFP + lin-15(+)]. Raise at 20C or higher and pick non-Muv to maintain array.

rtEx336 [nlp-12p::GFP + lin-15(+)]. Raise at 20C or higher and pick non-Muv to maintain array.

HG231 exhibits an approximately 20% increase in mean, median and maxium lifespans compared to N2. HG231 exhibits somewhat reduced fertility and somewhat longer development time than N2. It has a normal appearance, movements and mating behavior. It's swimming rate in liquid is slightly higher than N2. STS mapping indicates the most likely location for age-2 is on LG I.

This double mutant exhibits a doubling of both mean and maximum lifespans at 25C compared to N2. It exhibits a longer lifespan at 25C than it does at 20C. It has somewhat reduced fertility. It has normal development time, appearance, movements and feeding behavior. It's swimming rate in liquid is slightly higher than N2. STS mapping indicates the most likely location for age-2 is on LG I.

quEx168 [sax-3::GFP + odr-1::RFP]. Pick RFP+ to maintain. GFP is visible at higher magnification but fades quickly. Strongest GFP is in the head region. The Chin-Sang Lab recommends researchers use this strain instead of IC450, as sax-3::GFP expression in IC699 is more consistent than in the comparable strain IC450.

Improvement in thermotolerance at 37C, though weaker than in null mutants. Longer lifespan than to tax-2(gk117937) null mutant. Higher frequency of dauer formation and survival at 28C than tax-2(gk117937) null mutant. Reference: Hwang HY, et al. Front Genet. 2020 Oct 6;11:566948. doi: 10.3389/fgene.2020.566948. PMID: 33133151

Unc. Fertile with viable progeny at or below 20C. Glp-1 sterile at higher temperatures. No obvious visible phenotype associated with sog-1. Do not distribute this strain; other labs should request it 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.

Unc. Fertile with viable progeny at or below 20C. Glp-1 sterile at higher temperatures. No obvious visible phenotype associated with sog-6. Do not distribute this strain; other labs should request it 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.

Halicephalobus mephisto wild isolate. Has approximately 1.15% snp heterozygosity. Parthenogenetic reproduction so it cannot be out-crossed. Can survive higher temperatures than C. elegans. Useful model organism for studying heat tolerance; has expanded Hsp70 and AIG1 gene families. References: Borgonie G, et al. Nature. 2011 Jun 2;474(7349):79-82. Weinstein DJ, et al. Nat Commun. 2019 Nov 21;10(1):5268.

Temperature sensitive dauer constitutive. Highly penetrant at 25C, much less so at 20C and 15C. The dauers recover almost immediately after temperature down shift, so one may work with synchronous broods. Semi-dominant: about 10% of heterozygotes form dauers.

seaSi40 [(pCFJ448) (eft-3p::fmo-2 + H2B::GFP) + Cbr-unc-119(+)] I. Higher level of FMO-2 over-expression compared to KAE9. Improved healthspan, stress resistance and longevity. Reference: Leiser SF, et al. Science 350.6266 (2015): 1375-8.

Defective response to short wavelength light; response strongly reduced but not eliminated. All other characteristics seem wild type, including reponse to mechanosensory stimuli. Strong, probably null, allele. This mutation also blocks the coordinated light response of unc-31(e928) and egl-30(ad805). To identify lite-1 homozygous mutants when crossing into different backgrounds, use a fluorescence stereomicroscope with a GFP filter and zoom to the hightest magnification (60-100X) to distinguish Lite from non-Lite animals. This works best when the animals are mired in thicker parts of the food to slow their spontaneous locomotion but not their response to light. Scan animals around the edge of the food where it is thickest. Leave the lid of the plate off for a minute or so before starting to let the animals adjust to air currents.

Slow-growing wild-type, Him. Segregates WT, DpyUnc, WT males and dead eggs (hDf8 homozygotes). Heterozygotes also exhibit low-penetrance vulval blips; these may be more pronounced, present at higher frequency and accompanied at times by tail blips upon recovery from starvation. hDf8 dominantly suppresses recombination from around unc-13 at least to dpy-5, and possibly to the left end of chromosome I. Maintain by picking WT and checking for correct segregation of progeny. This strain was generated by the Genetic Toolkit project, which should be acknowledged in any publications resulting from its use: The Genetic Toolkit is funded by the NIH National Center for Research Resources (NCRR) (USA) to Ann M. Rose, David L. Baillie, and Donald L. Riddle. Report all experimental results to Ann Rose.

Heterozygotes are WT and segregate WT (fluorescent), Dpys (highly fluorescent) and L3 lethals (non-fluorescent). GFP semi-dominantly expressed in 4-60 cell embyros, pharyngeal muscle and gut. Pharyngeal and gut GFP is easily seen in a UV dissecting microscope; early embryonic signal requires higher magnification. mIs14 occasionally crosses off mIn1[dpy-10], apparently by double recombination. mIs14 is ccEx9747 integrated into mIn1[dpy-10]. This is a three-construct element containing myo-2 and pes-10 promoters and a gut enhancer fused individually to GFP coding sequence. Called LB21B.

xchIs15 [hsp-16.2p::ssSel1::FLAG::superfolderGFP::spacer::humanAmyloidBeta1-42::let-858 3’UTR + rol-6(su1006)]. Maintain at 15C: Prone to transgene suppression at higher temperatures. Rollers. Upon heat shock, human amyloid beta is expressed and secreted into the extracellular space. Aggregates are found in the extracellular space after 16 hours. Generated in N2 background. Reference: Jongsma E, et al. eLife. 2023 Sep 20;12:e83465. doi: 10.7554/eLife.83465. PMID: 37728486.

kuIs118 [daf-15p::daf-15::mCherry + Cbr-unc-119(+)] II. kuIs118 is a single copy insertion into ttTi5605 via CRISPR/Cas9. Superficially wild-type. mCherry expression observed throughout the body. mCherry detected throughout development by western blot with anti-mCherry antibody, with highest expression levels in early larval stages. Reference: Sewell AK, et al. "The TORC1 phosphoproteome in C. elegans reveals roles in transcription and autophagy” iScience, 20 May 2022, 104186. https://www.sciencedirect.com/science/article/pii/S2589004222004564.

No visible phenotype. Severely decreased levels of the RoRNP-associated CeY RNA. Higher frequency of mutant 5S rRNA molecules into rop-1 ribosomes. See also WBPaper00003694.

nIs51 [egl-10(+) + lin-15(+)] X. Egl-C, Bor, hyperforaging, hyperactive locomotion, and male longevity and mating reduced. By Western blotting and staining the EGL-10 protein is highly overexpressed relative to N2. nIs51 was generated by injecting the lin-15 rescuing plasmid pEK1 at 50 ug/ml and the egl-10 rescuing fragment pMK21 at 80 ug/ml into MT1642 lin-15(n765) worms. The resulting strain was gamma irradiated and an integrant isolated, and was backcrossed to N2 four times. nIs51 was mapped to the right arm of X.

Bacteria. Jim Lewis received this E. coli strain from Henry Epstein in 1977. It is a prototroph and the worms grow well on it in liquid, even when the bacteria are highly labeled with 35-S. It hasn't been tested to see if it is temperature sensitive. It should be distributed as "Jim Lewis' NA22" until it has been confirmed that this is a certified version of NA22. Biosafety Level: BSL-1.

Caenorhabditis sp 36 wild isolate. Male-female strain. Maintain by mating. Maintain at 25C. A gonochoristic species isolated from adult weevils (Niphades variegatus), with whom they appear to be tightly associated during its life cycle. A genome comparison highlighted that C. sp. 36 has the smallest genome so far sequenced in the elegans supergroup, despite of being closely related to the largest genome species, C. japonica.

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 tm1598 homozygotes (produce ~100% dead eggs, slightly higher penetrance at 25C). Homozygous hT2[bli-4 let-? qIs48] inviable. Pick WT GFP and check for correct segregation of progeny to maintain. Reference: Peters N, et al., J Cell Sci. 2010 Mar 1;123(Pt 5):795-805.

otIs545 [gcy-5p::RFP + LacO repeats]. otIs593 [let-858p::GFP::LacI + ttx-3p::mCherry]. Maintain at 20C; otIs545 is very unstable at lower temperatures. RFP expression in ASER neuron. LACI::GFP aggregates on LacO repeats to form two dots in every nucleus. otIs545 is unstable, presumably due to the highly repetitive nature of the LacO array. Stock should be periodically examined for RFP expression and GFP localization to retain expression of the array. Reference: Patel T & Hobert O. eLife 2017.

otEx105 [lim-7::GFP + lin-15(+)]. Highly penetrant line, but non-Muv/Muv does not correlate well with presence/absence of extrachromosomal array. Maintain by picking GFP-positive animals under GFP-dissecting scope. GFP strongly expressed in gonad sheath cell pair 1.

syEx1136 [myo-2p::GFP + unc-119(+)]. unc-119 animal rescued with array that expresses GFP in the pharyngeal muscles. Pick non-Unc animals to maintain the array. Highly outcrossed version of unc-119(ed3) generated by the Sternberg lab. Pick Unc animals for heavily outcrossed unc-119(ed3) to use for out-crossing biolistic insertions, mosSCI insertions or miniMos insertions based on unc-119 selection. Reference: Frokjær-Jensen C, et al. Nat Methods. 2012 Jan 30;9(2):117-8.

ytEx209 contains [pRM8 (mel-46+) + pTG96(sur-5::GFP)]. GFP minus worms are Mel or sterile at 25 C (completely penetrant). Strong but not fully penetrant Mel at 15 C. Culture at 20°C or higher in order not to lose the transgene. To start a yt5 homozygous culture transfer several GFP minus worms to 15°C.

muIs84 [sod-3p::GFP + rol-6(su1006)]. Maintain at 20C or higher. Embryonic lethal at 15C. GFP should be visible at low magnification. Reference: Xu X, Kim SK. PLoS Genet. 2012;8(12):e1003108.

wgIs177 [egl-27p::TY1::EGFP::3xFLAG + unc-119(+)]. Maintain at 20C or higher. Embryonic lethal at 15C. Reference: Xu X, Kim SK. PLoS Genet. 2012;8(12):e1003108.