Genetic Analysis of F4:F5 Marker Assisted Derived Lines of Rice against Bacterial Leaf Blight (BLB) and their Marker Validation
Shah Shoumik, Rashmi Deep, Loitongbam Bapsila, Bisen Prashant, Singh V. K., Sandhya, Singh U. S.1, Singh P. K.*
Department of Genetics and Plant Breeding, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi (U.P.), 221005, India
1IRRI-STRASA, India Office, Rajendra Place, New Delhi, India
*Corresponding author: P.K Singh, Department of Genetics and Plant Breeding, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi (U.P.), 221005, India, Email: firstname.lastname@example.org
The 23 F4:F5 lines of rice derived from the cross HUR 105 and IRBB 55 against bacterial leaf blight (BLB) at phenotypic and genetic levels were evaluated during Kharif 2015. The validation for the BLB resistance genes Xa21 and xa13 by the static markers pTA-248 and xa13pro conferring that these two genes were present in all the 23 F4:F5 rice lines. The highest value of heritability was obtained for plant height (89%) followed by number of effective tillers per plant (77.48%), test weight (74.81%) and grain yield per plant (73.66%). Positive and significant association were recorded between grain yield per plant with plant height, panicle weight, number of effective tillers, filled grains per panicle and total grains per panicle. Path analysis revealed direct and positive effect on grain yield per plant through traits like plant height, panicle weight, number of tillers, filled grains per panicle and total grains per panicle. Highest genetic advance was observed for total grains per panicle (31.87) followed by filled grains per panicle (22.84) and plant height (8.11). High heritability and high genetic advance may be attributed to additive gene action and simple selection could be applied for genetic improvement.