Identification of Blast Resistant Breeding Lines through Uniform Blast Nursery in Rice (Oryza sativa L.)

Rice blast disease caused by the fungus Magnaporthe oryzae is most devastating of rice causing considerable yield losses. Development resistant varieties effective and environment friendly strategy to combat RNR 15048 (Telangana sona) (IET23746) a popular local variety possessing desirable, short-slender grain type with low glycemic index, good cooking quality having Pi2 gene for blast. However, it moderately susceptible bacterial blight no durable resistance weak culm. In this context, improvement blast, leaf important reduce Present study was carried out screen identify breeding lines in at Regional Agricultural Research station, Polasa, Jagtial, PJTSAU during Rabi, 2022-2023. 18 F3 were screened uniform nursery along parents 15048, MTU 1010 NILs, ISM NILs. TN1 NLR 34449 used as checks, respectively screening resistance. Screening done following 0-9 Standard Evaluation Scale (SES) Among studied 12 found score 3 6 reaction 5. showed highly 9 1.