Vol. 7, Issue 10 (2018)

Author(s):
B Jalandhar Ram, G Suresh Babu, ON Singh, G Roopa Lavanya and K Madhukumar

Abstract:
Twenty one hybrids derived during kharif 2015 along with ten parents and three checks namely (viz., Jaya, IR 64 and Anjali) a total 34 genotypes were evaluated for 15 yield and yield attributing characters. The analysis of variance for combining ability showed high significance of crosses for all the traits studied. The variance due to lines and testers were significant for all the characters studied. All the traits were observed significant for line × tester interaction. The SCA variances were higher than GCA variances for all the characters indicating the predominance of non-additive gene action. The lines Sahabhagi dhan (1.03) and MTU 1010 (0.32) and the tester SHIATS Dhan1 (1.43) possessed significant positive GCA effects implying that they are good general combiners and may serve as useful source for improvement hybridization programmes. Three hybrids MTU 1010 x BM 71 (high x low), MTU 1001 x NDR 359 (low x high) and NLR 34449 x SHIATS dhan1 (low x high) were identified as good specific cross combinations based on positive sca effects and per se performance.