Search Strains

Heterozygotes are WT and segregate WT heterozygotes, Sterile spe-4 homozygotes, and dead eggs (sDf5 homozygotes).

Heterozygotes are WT and segregate WT heterozygotes, Sterile Unc spe-4 unc-15 homozygotes, and dead eggs (sDf5 homozygotes). Pick wild-type to maintain.

Heterozygotes are WT. Segregates Dpy Uncs, and females (primary spermatocyte death). Do not distribute this strain; other labs should request it directly from the CGC.

Heterozygotes are WT and segregate wild-type, wild-type heterozygotes, and Sterile Dpy (spe-4 dpy-20 homozygotes). Homozygous mutants are weak Dpy and partially fertile at 15C. Sterile at 20-25C. Spermatogenesis arrests at the spermatocyte stage.

Him. Temperature-sensitive sterile. Small brood size even at permissive temperatures; pick fertile animals and maintain at 15C. Worms lacking spe-45 function produce morphologically normal and motile sperm that cannot fuse with oocytes despite direct contact in the reproductive tract. spe-45 hermaphrodites and males are subfertile at 16C and sterile at 25C. Reference: Singaravelu G, et al. Current Biology 2015. http://dx.doi.org/10.1016/j.cub.2015.10.055

mScarlet::3xMyc tag inserted at the C-terminus of the endogenous spe-44 locus by CRISPR. Allele obtained using the self-excising cassette, following Dickinson et al, 2015 method. SEC was excised; there is a lox511I in the synthetic intron left by the excision. Reference: Ragle JM, et al. Development. 2020 Nov 27;147(22):dev193862. doi: 10.1242/dev.193862. PMID: 33060131.

mScarlet::TEV::AID*::3xFLAG tag inserted at the C-terminus of the endogenous spe-44 locus by CRISPR. Insertion includes a flexible 30 amino acid linker between SPE-44 and mScarlet and was produced by SEC excision. Strain contains a lox511I site in a synthetic intron. Reference: Ragle JM, et al. Development. 2020 Nov 27;147(22):dev193862. doi: 10.1242/dev.193862. PMID: 33060131.

axIs1717 [pie-1p::GFP::histone H2B::spe-41 3'utr + unc-119(+)]. Transgene is prone to silencing -- maintain at 25C.

yokSi3 [spe-11p::trp-3A::TagRFP-T::tbb-2 3'UTR + Cbr-unc-119(+)] II. Reference: Takayama J & Onami S. Cell Rep. 2016 Apr 19;15(3):625-637.

Brood size 13.5 Brood size may increase after many passages. Do not distribute this strain; other labs should request it from the CGC.

fxSi1 [pie-1p::TIR-1::mRuby::unc-54 3' UTR + loxP, I: 2851003] I. Degron tag was inserted into the endogenous spe-44 locus in the JU2526 wild isolate background, allowing auxin-inducible spermatogenesis arrest and reversible male sterility. Reference: Kasimatis, KR et al. (2020) Post-Insemination Selection Dominates Pre-Insemination Selection in Driving Male Competitive Ability. bioRxiv doi: https://doi.org/10.1101/2021.06.23.449605

fxIs1 [pie-1p::TIR1::mRuby, I:2851009] I. Auxin-inducible spermatogenesis arrest, resulting in hermaphrodite self-sterility. AID* tag was inserted into the endogenous spe-44 locus. Reference: Kasimatis KR, et al. (2018) Auxin-Mediated Sterility Induction System for Longevity and Mating Studies in Caenorhabditis elegans. BioRvix. doi: https://doi.org/10.1101/284232.

fxIs1 [pie-1p::TIR1::mRuby, I:2851009] I. Auxin-inducible spermatogenesis arrest, resulting in hermaphrodite self-sterility and reversible male sterility. Him: males produced at ~30%. AID* tag was inserted into the endogenous spe-44 locus. Reference: Kasimatis KR, et al. (2018) Auxin-Mediated Sterility Induction System for Longevity and Mating Studies in Caenorhabditis elegans. BioRvix. doi: https://doi.org/10.1101/284232.

fxSi3 [hsp-16.41p::PEEL-1::tbb-2 3' UTR + rpl-28p::mKate2::unc-54 3'UTR + rps-0p::HygR::unc-54 3' UTR, I:2851003] I. fxSi4 [hsp-16.41p::PEEL-1::tbb-2 3'UTR + loxP, II: 8420157] II. Heat-shock strain can be maintained at 20C without any issues. Degron tag was inserted into the endogenous spe-44 locus, allowing auxin-inducible spermatogenesis arrest and reversible male sterility. Heat-shock-induced expression of PEEL-1 will cause lethality in both sexes. Five generations of lab adaptation following genome editing, all in the CB4856 background. Reference: Kasimatis, KR et al. (2021) Post-Insemination Selection Dominates Pre-Insemination Selection in Driving Male Competitive Ability. bioRxiv doi: https://doi.org/10.1101/2021.06.23.449605

fxSi1 [pie-1p::TIR-1::mRuby::unc-54 3' UTR + loxP, I: 2851003] I. fxSi4 [hsp-16.41p::PEEL-1::tbb-2 3'UTR + loxP, II: 8420157] II. fxSi6 [hsp-16.41p::PEEL-1::tbb-2 3' UTR + rpl-28p::mKate2::unc-54 3'UTR + rps-0p::HygR::unc-54 3' UTR, III: 10158855] III. Heat-shock strain can be maintained at 20C without any issues. Degron tag was inserted into the endogenous spe-44 locus, allowing auxin-inducible spermatogenesis arrest and reversible male sterility. Heat-shock-induced expression of PEEL-1 will cause lethality in both sexes. fxSi4 was originally inserted in a CB4845 background, but has been sufficiently backcrossed so that PX658 is >98.5% JU2526 genetic background. Reference: Kasimatis, KR. et al. (2021) Post-Insemination Selection Dominates Pre-Insemination Selection in Driving Male Competitive Ability. bioRxiv doi: https://doi.org/10.1101/2021.06.23.449605

Pick wild-type to maintain.

Heterozygotes are Unc and express myo-2::GFP in the pharynx. spe-42(tn1231) homozygotes are non-Unc and non-GFP. spe-42(tn1231) produces <1 self progeny at 16C and no self progeny at 25C. The Spe defect can be rescued by WT sperm. Homozygous nT1[unc-?(n754) let-? qIs50] are embryonic lethal.

Heterozygotes are Unc and express myo-2::GFP in the pharynx. unc-42(e270) spe-42(eb5) homozygotes are Unc and non-GFP. Whle unc-42(e270) spe-42(eb5) self progeny have not been quantified, spe-42(eb5) alone produces 9 self progeny at 16C and <1 self progeny at 25C. The Spe defect can be rescued by WT sperm. Homozygous nT1[unc-?(n754) let-? qIs50] are embryonic lethal.

K01A11.4. Apparent homozygous lethal deletion chromosome balanced by dpy-10-marked translocation. Heterozygotes are WT, and segregate WT, arrested mT1 aneuploids, sterile Dpys (mT1 homozygotes), and ok1590 homozygotes (arrest stage/phenotype undetermined). Pick WT and check for correct segregation of progeny to maintain. External left primer: TCACTATCCCCACAGAAGCC. External right primer: ATACCTACGCCCGCCTACTT. Internal left primer: GCGCGTAAACTTCTTTCCAG. Internal right primer: TCTCCACATTTTCCACCACA. Internal WT amplicon: 3007 bp. Deletion size: 1099 bp. Attribution: This strain was provided by the C. elegans Reverse Genetics Core Facility at the University of British Columbia, which is part of the international C. elegans Gene Knockout Consortium, which should be acknowledged in any publications resulting from its use. Paper_evidence WBPaper00041807