Search Strains

Severely Uncoordinated; Him; feminized at temperatures above 20C. Grow at 15C. Used for generating patroclinous WT males, by exploiting non-disjunction caused by him-8, and dominant sex-linked unc-1.

Phenotypically wildtype XX hermaphrodite at 20C; poor viability and fertility at 25C. Rare XO animals are hermaphrodite due to suppression of amber mutation e2115 and consequent transformation of XO due to tra-2(e2046) gain-of-function. Reference: Hodgkin & Albertson (1995) PMID: 8647390.

Self-fertile intersexual XX animals. Tra-3 masculinized phenotype suppressed by egl-26 mutation. Reference: Hodgkin (1986) PMID: 3770465.

Male/female strain. Maintain by mating. XX animals are female. XO animals are WT males.

Wildtype hermaphrodites segregating wildtype hermaphrodites and tra-1 XX males, which mate with greater efficiency than most tra-1 XX mutants. Reference: Hodgkin (1987) PMID:3428597.

Spontaneous mutation in TR679. Adults slightly Unc, slow and loopy. Larvae more affected, slow moving.

Spontaneous mutation in parental strain TR679. Adults backward coiler, slow forward, slight kinker. Larvae more affected, strong kinkers. Variable penetrance.

Hermaphrodites segregating males with abnormal ray lineages. Reference: Hodgkin et al. (1989) Genome, 31, 625-637. doi:10.1139/g89-116.

Poorly growing, low self-fertility masculinized XX hermaphrodites. Weak allele of tra-2, partly suppressed to self-fertility by smg (NMD) mutation; permits efficient selection of new feminizing mutations. References: Spence et al. (1990) PMID: 2317869. Zarkower et al. (1994) PMID: 7520378.

ZZ21 lev-1(x21) tra-3(e2333) isolated by Jim Lewis as EMS-induced levamisole resistant derivative of N2. Found to carry a cryptic tra-3 allele by Jonathan Hodgkin. XX animals are viable hermaphrodites which produce 500 rather than 330 self-progeny; occasionally Egl; no other signs of masculinization.

Wild type. previously called unc-110.

Grows poorly, best at 20C. Self-fertile intersexual XX hermaphrodite due to partial suppression of weak tra-1 allele by smg-2(NMD). References: Zarkower et al. (1994) PMID: 7520378. Hodgkin (1987) PMID:3428597.

Unc-cannot back. Egl. Males abnormal. Multiple defects in neuronal outgrowth and branching, also defects in excretory canal extension and in sex muscles migration.

Unc-32 hermaphrodites segregating Unc hermaphrodites and Unc Tra homozygous XX pseudomales with variable male tails, hermaphroditic gonads and adult yolk production. Class B2 allele (male tail, sterile hermaphrodite gonad) derived by mutation of tra-(gf) allele e1575. Reference: Hodgkin (1987) PMID:3428597.

Obligate male/female strain; maintain by crossing. Anatomically normal XX females and XX males. Male/female strain with sex determined by fem-1(+). Reference: Strain 11 in Hodgkin (2002) PMID: 12399387.

y1 is a temperature sensitive mutation affecting only XX animals. him-8(e1489) causes X non-disjunction, resulting in many males. Grow at 15C. XX and XXX animals not viable above 15C. After shifting to 25C, surviving population is almost all XO males.

Obligate male/female strain; maintain by crossing. Anatomically normal XX females and XX males. Male/female strain with sex determined by an extrachromosomal transgene array carrying fem-1(+). Reference: Strain 16 in Hodgkin (2002) PMID: 12399387.

Obligate male/female strain; maintain by crossing. Anatomically normal XX females and XX males. Male/female XX strain with sex determined by tra-2(+). Reference: Strain 6 in Hodgkin (2002) PMID: 12399387.

Variable phenotypes, slightly dumpy and/or uncoordinated, especially at 25C. Grows poorly at 15C. Low fertility. sup-33(st389) is a weak amber suppressor; e2017 and e138 are amber mutations. Reference: Kondo K, et al. (1990) J Mol Biol. 1990 Sep 5;215(1):7-19.

eEx24 [tra-3(+) + rol-6(su1006)]. Pick Rollers to maintain. Roller hermaphrodites producing more Rol hermaphrodites and non-Rol hermaphrodites that produce broods of 100% Tra-3 XX pseudomales. Tra-3 mutant rescued by transgenic tra-3(+); useful source of homozygous m+z- tra-3 XX hermaphrodites. Reference: Barnes & Hodgkin (1996) PMID: 8887539.

Wild type. Low Tc1 copy number; pattern X. [Obtained from Rothamsted by S. Brenner as 'Panagrellus redivivus'. Cross fertile with C. elegans N2.] Caenorhabditis elegans wild isolate. CB subclone of N3 (Tc1 pattern X). For whole-genome sequence-verified wild strains, please request from the Caenorhabditis Natural Diversity Resource (www.caendr.org).

Isolated from a pineapple field in Hawaii in 1972 by L. Hollen. Wild type. Low copy Tc1; pattern IX. C. elegans wild isolate. CB subclone of HA-8 (Tc1 pattern IX). See also WBPaper00005369. [NOTE (4-2014): Users reported abnormalities in CB4856 in late 2013 and early 2014. The current working stock at the CGC was thawed in 2-2014 from stock frozen in 1995.] For whole-genome sequence-verified wild strains, please request from the Caenorhabditis Natural Diversity Resource (www.caendr.org).

Intersexual self-fertile XX hermaphrodites with Smg (protruding vulva) phenotype. Grows poorly, does best at 20C. Class B1 allele of tra-1 combined with smg-2(NMD), useful for selection of modifiers. Reference: Zarkower et al. (1994) PMID: 7520378

Fertile hermaphrodites segregating more fertile hermaphrodites and sterile Class A10 tra-1(rh132) XX homozygotes, which have hermaphrodite non-gonadal anatomy and male gonads; Smg (NMD)-sensitive. Reference: Zarkower et al. (1994) PMID: 7520378

Weak Tra-2 allele, homozygous self-fertile XX. Slightly masculinized hermaphrodite, adults lack tail spike. Reference: Hodgkin & Barnes (1991) PMID: 1684664.

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.

Hypomorphic allele. Homozygous XX animals are masculinized; have hermaphrodite gonad, abnormal male non-gonadal anatomy; self-fertile.

Unc. Moves backward better than forward, kinker in forward movement.

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.

Male/female strain, propagate by crossing. XX females and tra-1 XX males. Low fertility. Fertile females and fertile males; male-biased sex ratio. Strain with sex determined by a feminizing fragment chromosome (LGIIIR); unusual sex ratio. Reference: Strain 15 in Hodgkin (2002) PMID: 12399387.

Attached X chromosome line. Long hermaphrodites with low fertility, producing some X^X X^X dead eggs. May spontaneously revert to unattached lon-2 XX. Reference: Hodgkin & Albertson (1995) PMID: 8647390.

eEx36 [F16E1 + rol-6(su1006)]. eEx36 carries multiple copies of fox-1, which confers a Xol phenotype and pRF4 which confers a Rol phenotype. dpy-26(n199) is XO viable and XX lethal. Strain consists mostly of Rol hermaphrodites and non-Rol males, all XO.

Male/female strain, propagated by crossing. eDp25 carries tra-1 gain-of-function allele. Anatomically normal XX females, tra-1(e1732) XO males, and intersexual tra-1(e1732) XX and e1732; eDp25 XO. References: Hodgkin (1987) PMID: 3428597. Zarkower et al. (1994) PMID: 7520378.

Hermaphrodites have abnormal truncated or blebbed tails, pale appearance, some excretory cell abnormalities, especially in adults. Males have variably abnormal tails, some are able to mate.

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.

Severely uncoordinated coiler, slow growing. Useful strain for selecting non-Sup-1 suppressors of unc-17(e245). Reference: Mathews et al. (2012) PMID: 23051648.

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.

Unable to propagate indefinitely: lines become sterile from F10-F28, with short telomeres and fused chromosomes. Hypersensitive to X-irradiation; weak Him phenotype; strong Him phenotype in later generations resulting from X-A fusions. Cross once or twice, freeze down many F2 mrt-2 plates, and go back to these plates every two months for fresh a mrt-2 line. A BstN1 RFLP makes the mrt-2 mutation easy to track.

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.

Recessive. Kinker Unc.

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.

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.

Dumpy. e2760/0 Dpy males are able to mate (ME 1/2), in contrast to other dpy-6 alleles. mrt-2 induced.

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.