Combining ability study in rice (Oryza sativa L.)

Abstract

In the present investigation combining ability study was undertaken by crossing five lines and four testers in Line x 
Tester fashion. Based on the gca effects, the five parents CO (R) 50,       
ADT 49, MDU 6, CSR 27 and Ezhome 1 
were identified as the best combiners for yield and various yield attributing traits and two other qualitative traits. 
Regarding hybrids, ADT 49 / CSR 23, ADT 49 / CSR 27, CO (R) 50 / Anna 4 and CO (R) 50 / CSR 23, MDU 6 / 
Ezhome 1,  ASD 16 / CSR 23 and CO (R) 50 / CSR 27 were identified as best specific combiners for yield and yield 
attributing traits. The study also reveals the preponderance of non-additive gene action which favors the commercial 
exploitation of these hybrids improve yield ultimately. The same hybrids would also produce promising and 
desirable segregants in the segregating generations.