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 |
Present investigation was carried out with 12 advanced (M7) mutants developed using gamma rays on two varieties i.e., BPT-5204 and RP Bio-226 along with checks (Gangavati Sona and CSR-22) at Agricultural Research Station Gangavati, Karnataka state, India during kharif 2018. Analysis of variance revealed highly significant differences among the mutant lines for all morpho-physiological characters under study viz., Days to 50 per cent flowering, Plant height, Panicle length, Number of grains per panicle, Panicle weight, Productive tillers per hill, Length of flag leaf and Grain yield per plant. Higher magnitude of heritability (broad sense) and genetic advance as percentage of mean were observed for number of grains per panicle, productive tillers per hill, spikelet sterility, test weight, grain yield per plant, grain yield per ha and Na+/K+ ratio indicating presence of additive gene action and fixation of genes. Correlation study revealed that grain yield per plant exhibited significant positive association with plant height, panicle length, number of grains per panicle and panicle weight at phenotypic level under saline stress condition. However, significant negative association was observed in case of days to fifty per cent flowering. Path analysis revealed that plant height, panicle length, panicle weight and length of flag leaf exhibited direct positive effect on grain yield per plant. Hence, it would be rewarding to lay stress on these characters in selection programme for increasing the yield and to screen for salinity tolerance.
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