Search Strains

Male-female strain. Reference WBG 9(3) 121. Isolated from sugar cane in Trinidad by D.J. Hunt (Commonwealth Institute of Parasitology). [7/7/93: Scott Baird and David Fitch question whether this strain is really C. remanei.] [7/95: Not cross-fertile with the authentic C. remanei isolated by Walter Sudhaus.] Previously called C. remanei by the CGC. Walter Sudhaus has tentatively described this strain as Caenorhabditis sp.; this description is not offical and is contigent upon its being published. See WBPaper00002633 and WBPaper00003993. sp. 4 in Kiontke and Sudhaus Wormbook Ecology chapter.

Heterozygous. Maintain by picking fertile hermaphrodites. Stable XX male/female strain (fertile XX females and low fertility XX males); males sire only female progeny. Reference: Strain 3 in Hodgkin (2002) PMID: 12399387.

Self-fertile hermaprodite or female. Protruding vulva. tra-1(e2272) XX homozygotes are sterile with abnormal gonads; e2272 mutation is partly suppressed by NMD (smg-2(e2008)), hence double mutants are fertile. Reference: Zarkower et al. (1994) PMID: 7520378.

Hermaphrodites are WT. Males form copulatory plug when mating. Weaker than CB3855 males.

Intragenic partial revertant of tra-1(e2272). Fertile hermaphrodites or females. Reference: Zarkower et al. (1994) PMID: 7520378.

WT hermaphrodites segregate WT hermaphrodites and males, Dpy hermaphrodites and males and Stu (Sterile and Uncoordinated) hermaphrodites and males.

WT hermaphrodite if grown at 15-20C. WT females if grown at 25C. When crossed, these females yield only XX viable hermaphrodite progeny, all XO progeny are dead.

Attached X strain with autosomal unc-4 marker, which facilitates test-crosses. Uncoordinated Long hermaphrodites, reduced fertility with many X^X X^X unhatched eggs. Reference: Hodgkin & Albertson (1995) PMID: 8647390.

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.

ar221 is a tra-2 ts allele. Strain will grow at 15C as Egl hermaphrodites. When grown at 25C, all animals mature into X males, many of which are fertile. Good source of pure XX mating males. ar221 isolated by Jane Hubbard.

Him. Temperature-sensitive: infertile above 20C. Variably masculinized XX hermaphrodites segregating normal XO males. Stronger XX masculinization than null alleles of tra-3. Reference: Francis et al. (1995) PMID: 7713420.

fox-1(e2643) is a 1.2 kb deletion of fox-1; functional null. Hermaphrodites and males are WT in gross phenotype, slightly abnormal in hermaphrodite fertility and male mating. Synergistic masculinizing effects with some X chromosome deletions.

Unc. See also WBPaper00002536.

Obligate XO hermaphrodite. Low fertility, segregating many dead XX and nullo-X zygotes. Double mutant combining two null or near-null mutations. Reference: van den Berg MCW, et al. Genetics. 2006 Jun;173(2):677-83. doi: 10.1534/genetics.106.056093. PMID: 16582430.

mIs12 [myo-2p::GFP + pes-10p::GFP + F22B7.9p::GFP] II. Hermaphrodites expressing compound GFP reporter (see PD4790). Strong pharyngeal muscle expression, easily scored by GFP dissecting scope. mIs12 is tightly linked to unc-4 II, and not to LG III or IV as previously reported. mIs12 homozygous males mate well (ME3).

Maintain by crossing males and hermaphrodites; may revert to purely hermaphrodite line. Fertile hermaphrodites and fertile males. Obligate XX strain with sex determined by her-1 V. Reference: Strain 9 in Hodgkin (2002) PMID: 12399387.

Unc hermaphrodites and males. Mate have variably abnormal tail anatomy. ME 0.

ccIs4251 [(pSAK2) myo-3p::GFP::LacZ::NLS + (pSAK4) myo-3p::mitochondrial GFP + dpy-20(+)] I. Superficially WT hermaphrodites and males expressing GFP in nuclei and mitochondria of body wall muscles. Fluorescent body wall muscle nuclei can be seen by dissecting microscope with epifluoresence optics. Males mate poorly (ME 1/2). ccIs4251 mapped to LGI, + 2.5.

vhl-1 deletion. Constitutive HIF-1 in normoxia, slow growth and reduced brood size. See also WBPaper00005962.

Male/hermaphrodite strain, propagate by crossing. Fertile XX hermaphrodites and fertile XX males. Obligate XX strain with sex determined by amber-suppressing tRNA, sup-34. Reference: Strain 14 in Hodgkin (2002) PMID: 12399387.

Temperature-sensitive: Maintain at 15C. Stable, temperature-sensitive tetraploid strain: fertile 4A;3X hermaphrodites and 4A;2X males at 15C; fertile 4A;3X females and feminized sterile 4A;2X males at 25C. Reference: Hodgkin (2002) PMID: 12399387.

Viable slightly dumpy hermaphrodites, drug and bleach sensitive, resistant to M. nematophilum (Bus phenotype) and Leucobacter Verde1, hypersensitive to Leucobacter Verde1. References: Partridge et al. (2008) PMID: 18395708. Hodgkin et al. (unpublished, in preparation).

Some hermaphrodites (<50%) have single small protrusion posterior to vulva, occassional vulval rupture.

Viable hermaphrodites with slightly skiddy locomotion, drug- and bleach-sensitive, resistant to infection by M. nematophilum and Leucobacter Verde2, hypersensitive to Leucobacter Verde1. Reference: Yook & Hodgkin (2007) PMID: 17151260.

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.

Severe dumpy; dominant, hence crossing with wild-type males yields dumpy hermaphrodites and dead eggs (dpy-25/+; xol-1/0).

Notched head. Recessive. 100% Penetrance. Male spicules abnormal. M-MATING-NO SUCCESS. See also WBPaper00002236.

No obvious phenotype, apparently wildtype sensitivity to pathogens. Reference: O’Rourke et al. (2005) PMID: 16809667.

No obvious phenotype, apparently wild-type sensitivity to pathogens. Derivative of RB1663, further out-crossed into wild-type background. Reference: O’Rourke et al. (2005) PMID: 16809667.

Anatomically normal hermaphrodites and males; Bus (resistant to infection by M. nematophilum); weakly resistant to Leucobacter Verde2; insensitive to Leucobacter Verde1. Reference: J Hodgkin (unpublished).

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

No obvious phenotype, apparently normal sensitivity to bacterial pathogens. Derived from RB1897; further out-crossed into wild-type background. References: O’Rourke et al. (2005) PMID: 16809667. D J O'Rourke and J Hodgkin, unpublished.

Long. Mapping marker standard. M-MATING++++ >30%WT.

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).

Skiddy hermaphrodites, bleach-sensitive, drug-hypersensitive, abnormal bacterial pathogen resistance. Reference: Stroud et al (in preparation).

Skiddy, bleach-sensitive hermaphrodites. Resistant to infection by Leucobacter Verde1. Reference: O'Rourke et al. (in preparation).

Him. Skiddy, bleach-sensitive hermaphrodites and males. Resistant to Leucobacter Verde1. Reference: O'Rourke et al. (in preparation).

Pick wild-type to maintain. Wild-type hermaphrodites segregate wild-type and dead masculinized embryos. e3026 is nonsense mutation in essential gene Y47D3B.1. Reference: O'Rourke et al (in preparation).

wIs78 [SCMp::GFP + ajm-1p::GFP + F58E10 (cosmid) + unc-119(+)] IV. Heterozygous strain. Wild-type hermaphrodites segregating wild-type, Dpy-18, and dead eggs (subs-4 homozygotes). Pick wild-type to maintain. Reference: Gravato-Nobre et al (in preparation).

ccIs4251 [(pSAK2) myo-3p::GFP::LacZ::NLS + (pSAK4) myo-3p::mitochondrial GFP + dpy-20(+)] I. mIs12 [myo-2p::GFP + pes-10p::GFP + F22B7.9p::GFP] II. frIs7 [nlp-29p::GFP + col-12p::DsRed] IV. uIs69 [pCFJ90(myo-2p::mCherry) + unc-119p::sid-1] V. Mapping strain. This strain is homozygous for integrated fluorescence markers on LG I, II, IV and V, all of which are easily and independently scored using a fluorescent dissecting microscope, plus an easily scored visible marker (dpy-17) for LGIII. The good markers on all five autosomes facilitate linkage assignment of unmapped mutations, and enable rapid replacement of chromosomes when outcrossing heavily mutagenized strains such as those from the Million Mutation Project.

eEx849 [C28H8.4(sdmV186E)]. unc-17 missense mutant suppressed by missense C28H8.4 transgene. Pick non-Unc hermaphrodites to maintain. Animals that have lost the array are severely Unc (coilers). Reference: Stroud et al (in preparation).

eEx855 [erd-2(sdmV186E) + sur-5p::GFP]. unc-17 missense mutant partly suppressed by missense erd-2 (a.k.a. sup-2) transgene. Pick GFP+ (weak Unc) hermaphrodites to maintain. Animals that have lost the array are severely Unc (coilers). Reference: Stroud et al (in preparation).

Superficially wild-type. References: Rosu S, et al. Science. 2011 Dec 2;334(6060):1286-9. doi: 10.1126/science.1212424. PMID: 22144627. Toraason E, et al. Curr Biol. 2021 Apr 12;31(7):1508-1514.e5. doi: 10.1016/j.cub.2021.03.008. Epub 2021 Mar 18. PMID: 33740427. Toraason E, et al. Elife. 2024 Aug 8;13:e80687. doi: 10.7554/eLife.80687. PMID: 39115289.

Unc-weak kinker. Fairly active. Healthy. See WBPaper00002474. Previously called unc-24(e927).

Notched head. Tail abnormalities. Variable expression. Incomplete penetrance. Especially seen in L1. M-MATING++++ >30%WT. See also WBPaper00003843 and WBPaper00003865. Previously called efn-1(e96).

Resistant to radiation-induced apoptosis (Dam); non-Gla; very weak Rad; no gross phenotype. This strain cannot be distributed to commercial organizations. This strain cannot be used for any commercial purpose or for work on human subjects.

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. ubh-4(cer25[F73V]) is a missense mutation mimicking a human BAP1 cancer mutation. Reference: Martinez-Fernandez C, et al. Cells. 2023 Mar 18;12(6):929. doi: 10.3390/cells12060929. PMID: 36980270

Superficially wild-type. ubh-4(cer32[A87D]) is a missense mutation mimicking a human BAP1 cancer mutation. Reference: Martinez-Fernandez C, et al. Cells. 2023 Mar 18;12(6):929. doi: 10.3390/cells12060929. PMID: 36980270

Isolated in 1991 by Carlos E. Winter in soil samples taken at the University of Sao Paulo in Brazil. Hermaphrodite strain. Adults are smaller than C. elegans. The life cycle is a little longer than C. elegans at 22C. Each lays about 300 eggs in the three days following the moult from L4 to adult. Eggs are laid just after being fertilized resulting sometimes in plates with many eggs (much more than C. elegans). See Comp. Biochem. Physiol 103B: 189, 1992. See Nematology 2(1): 89-98, 2000. Can be grown and maintained on NGM. L1s easily frozen and stored in liquid nitrogen. This strain is deposited in Paul Sternberg's collection under the name PS1022. The species has not yet been determined; Lynn Carta will publish a paper proposing Oscheius brevesophaga. DO NOT use this name before the paper is published. Contact Carles E. Winter or Lynn Carta before publishing anything official about this strain. See also WBPaper00004471 and WBPaper00004485. AKA Oscheius sp. 1.