Registration of Grain Sorghum Seed (A/B) and Pollinator (R) Parent Lines for Chilling and Drought tolerance

Authors: PERUMAL, RAMASAMY - Kansas State University; TESSO, TESFAYE - Kansas State University; JAGADISH, S.V. KRISHNA - Kansas State University; KUMAR, VIPAN - Kansas State University; AKIEN, ROBERT - Kansas State University; Bean, Scott; Smolensky, Dmitriy; Peiris, Kamaranga; PRASAD, P.V. VARA - Kansas State University; LITTLE, CHRISTOPHER - Kansas State University

Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 1/10/2022
Publication Date: N/A
Citation: N/A

Interpretive Summary: Four sorghum [Sorghum bicolor (L.) Moench] seed parents male sterile A and four male fertile B maintainer lines from Agricultural Research Center, Hays, KS, were approved for release by the Kansas State University in July 2021. These ten lines were from different populations and were developed through recurrent selection (random mating) followed by pedigree and backcross breeding methods between the selected germplasms adapted breeding lines and different genetic male-sterile (GMS) ms3 lines in different combinations. Four parent lines are tolerant to chilling stress and six parent lines are tolerant to drought stress recommended to develop hybrids respectively for early (end of April to first week of May) and regular (end of May to first week of June) planting for the central Great Plains. Preliminary screening of all ten lines showed resistance to nine post-emergence herbicides. These ten parent lines are early to medium maturity, three-dwarf (dw1, Dw2, dw3, dw4) in height, photoperiod-insensitive, and possess unique combinations of plant and seed color. All ten parent lines are tannin free with good grain quality, short peduncle length, compact or semi-compact panicles with good exsertion, and combining ability for yield and standability.

Technical Abstract: Four sorghum [Sorghum bicolor (L.) Moench] seed parents male sterile A and four male fertile B maintainer lines [KS148A (Reg. No….), KS148B (Reg. No…), KS149A (Reg. No....), KS149B (Reg. No…), KS150A (Reg. No…), KS150B (Reg. No.…), KS151A (Reg. No.…), KS151B (Reg. No…)] and six pollinator parents [KS152R (Reg. No…), KS153R (Reg. No…), KS154R (Reg. No…), KS155R (Reg. No…), KS156R (Reg. No…) and KS157R (Reg. No…) from Agricultural Research Center, Hays, KS, were approved for release by the Kansas State University in July 2021. These ten lines were from different populations and were developed through recurrent selection (random mating) followed by pedigree and backcross breeding methods between the selected germplasms (PI574562, PI550610, PI574599, PI574560, PI 550607 and IS1269C), adapted breeding lines and different genetic male-sterile (GMS) ms3 lines (KP 8B, N310B, B06-41701-167, B9614, BHF14, BH8606-6) in different combinations. Parent lines KS148A&B, KS149A&B, KS152R and KS153R are tolerant to chilling stress and KS150A&B, KS151A&B, KS154R, KS155R, KS156R and KS157R are tolerant to drought stress recommended to develop hybrids respectively for early (end of April to first week of May) and regular (end of May to first week of June) planting for the central Great Plains. Preliminary screening of all ten lines showed resistance to nine post-emergence herbicides. These ten parent lines are early to medium maturity, three-dwarf (dw1, Dw2, dw3, dw4) in height, photoperiod-insensitive, and possess unique combinations of plant and seed color. All ten parent lines are tannin free with good grain quality, short peduncle length, compact or semi-compact panicles with good exsertion, and combining ability for yield and standability.