Screening of Rice Germplasm against Multiple Diseases and their Yield Performance

A large rice germplasm accessions was evaluated for resistance against major three diseases, viz., bacterial leaf blight (Xanthomonas oryzae pv.oryzae), sheath blight (Rhizoctonia solani) and sheath rot (Soracladium oryzae) in two successive generation i.e.Kharif 2017 and Kharif 2018 along with six checks.All the genotypes were evaluated under artificial field inoculation.On the basis of disease intensity, none of the entries were found immune or resistant for all the three major diseases for both the years.However, eleven genotypes viz., Ayepyaung, Umari, R 1882-306-4-243-1, Dubraj-11, Jaya, YNP 7066, CR 3856-29-14-2-1-1-7-1, CR 3504-12-2-1-1-1-1, Madhuraj-55, Barhasaal and Krishnanjana; three genotypes namely, Umari, R 2053-202-2-145-1 and IC : 124525 and only two genotypes Kamini Joha and Loktimachhi were showed moderately resistant reaction for bacterial leaf blight, sheath blight and sheath rot, respectively.Low severity for both bacterial leaf blight and sheath rot were found in Umari, CR 3856-29-14-2-1-1-7-1 and R 2053-202-1245-1.The genotypes CR 3504-12-2-1-1-1-1 moderately resistant for BLB, IC : 124525 moderately resistant for sheath blight and Loktimachhi moderately resistant for sheath rot were found to be significantly superior for yield per plant.These genotypes can be further exploit for the development of high yielding resistant varieties.