Registration of Tx3499–Tx3503 sorghum germplasm resistant to acetyl-coenzyme A carboxylase-inhibiting herbicides

Abstract

The sorghum [Sorghum bicolor (L.) Moench ssp. bicolor] germplasm lines Tx3499–Tx3503 (Reg. no. GP-948–Reg. no. GP-952, PI 706257–PI 706261) were developed by the Texas A&M AgriLife Research sorghum breeding program in 2024. These lines are resistant to acetyl-coenzyme A carboxylase (ACCase)-inhibiting herbicides used for post-emergence control of common grass weeds. Genetic resistance to aryloxyphenoxypropionate and phenylpyrazoline class herbicides was introgressed into Tx3499–Tx3503 from a donor line that contained a single partially dominant gene. These lines represent diverse pedigrees and an array of combinations of grain color, plant color, maintenance of sterility or restoration of fertility to A₁ male-sterile cytoplasm, as well as other agronomic traits. They provide the sorghum industry with sources of resistance to ACCase-inhibiting herbicides in elite backgrounds for use as seed and pollinator parent germplasm.