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.
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