National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Soil sodicity poses a significant challenge to rice (Oryza sativa L.) production, especially in the salt-affected regions of India. This study aimed to evaluate the combining ability of rice genotypes for yield and morphophysiological traits under sodic soil conditions using a Line × Tester mating design. Thirteen diverse lines and four testers were crossed to produce 52 F? hybrids, which were evaluated along with their parents under sodic conditions during the Kharif seasons of 2023 and 2024. Significant variation among genotypes was observed for all eleven traits studied, indicating ample genetic diversity. Line × Tester analysis revealed that specific combining ability (SCA) variance was higher than general combining ability (GCA) variance for most traits, suggesting the predominance of non-additive gene action. Among the parents, lines such as NDRK 5081, NDRK 5012, and NDRK 50030 were identified as good general combiners for grain yield and associated traits, while some genotypes like NDRK 5082 showed poor GCA effects. Testers such as IR 6 and CSR 28 also demonstrated favorable GCA for key traits under sodic conditions. Several hybrids, including NDRK 5081 × IR 6 and NDRK 5012 × CSR 28, exhibited high SCA effects for grain yield, plant height, and panicle length, making them promising candidates for hybrid development. The findings highlight the potential of utilizing both additive and non-additive gene actions through the selection of superior parental lines and hybrids for improving rice performance in sodic soils.
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