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). This strain is difficult and time consuming to maintain. Gives relatively few heterozygotes. 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.

Break points: In(F53G12.8 T02E1.7 In(gsp-3 sre-23)) I. Covered region (Mb) 8.1 (0.1..8.3) Balancer marked with myo-2p::Venus. tmIs1219 is inserted in unc-14, but Unc phenotype is not detectable. Reference: Dejima K, et al. Cell Rep. 2018 Jan 2;22(1):232-241.

Break points: In(F53G12.8 T02E1.7 In(gsp-3 sre-23)) I. Covered region (Mb) 8.1 (0.1..8.3) Balancer marked with myo-2p::Venus. Dpy. Reference: Dejima K, et al. Cell Rep. 2018 Jan 2;22(1):232-241.

juIs76 [unc-25p::GFP + lin-15(+)] II. Precise deletion of src-1 generated by Cas9 genome editing. Balancer marked with myo-2p::Venus. Heterozygotes are wild-type with Venus+ pharynx, and will segregate wild-type with Venus+ pharynx (heterozygotes), sterile adults without Venus in pharynx (lq185 homozygotes), and Dpy with Venus+ pharynx (tmC20 homozygotes). GFP expression in GABAergic motor neurons. Reference: Mahadik S, et al. bioRxiv 2023.05.20.541322; doi: https://doi.org/10.1101/2023.05.20.541322.

juIs76 [unc-25p::GFP + lin-15(+)] II. D381A substitution mutation generated by Cas9 genome editing. Balancer marked with myo-2p::Venus. Heterozygotes are wild-type with Venus+ pharynx, and will segregate wild-type with Venus+ pharynx (heterozygotes), embryonic lethality (syb7248 homozygotes), and Dpy with Venus+ pharynx (tmC20 homozygotes). GFP expression in GABAergic motor neurons. Reference: Mahadik S, et al. bioRxiv 2023.05.20.541322; doi: https://doi.org/10.1101/2023.05.20.541322.

Balancer recombination happens frequently at 23-25C, strain must be maintained at 16-20C. Homozygous lethal mutation balanced by Dpy- and myo-2p::Venus-marked inversion. Heterozygotes are non-Dpy with relatively dim pharyngeal GFP (Venus) expression, and segregate heterozygous non-Dpy Venus+, non-Venus cc2557 homozygotes (L1 arrest), and Dpy with brighter Venus+ (tmC20 homozygotes). Pick wild-type Venus(+) and check for proper segregation of progeny to maintain. cc2557 is an engineered mutation creating an early stop (T8*). Presumptive rps-10 null. Heterozygous rps-10(cc2557)/tmC20 animals are delayed in development. Reference: Cenik ES, et al. Dev Cell. 2019 Mar 25;48(6):811-826.e6. doi: 10.1016/j.devcel.2019.01.019. PMID: 30799226.