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 |
The present investigation was carried out during kharif 2017-2018, at Main Rice Research Centre farm, Navsari Agricultural University, Navsari. The experimental material for present investigation comprised of Six generations viz., P1, P2, F1, F2, BC1 and BC2 of following four crosses were involved eight diversified cultivars of rice (Oryza sativa L.) were used to study the genetic analysis of quantitative and qualitative traits. The results of the scaling tests revealed that the additive-dominance model was inadequate for all of the characters evaluated in all of the four crosses, suggested the existence of epistasis in the inheritance of these characters. On the basis of six parameter model, main effect viz., mean (m), additive (d) and dominance (h) and all three digenic interactions viz., additive x additive (i), additive x dominance (j) and dominance x dominance (l) were significant for days to 50% flowering in cross 2 (GNR-3 X IET-25446) and cross 3 (GNR-5 X IET-25471), for days to maturity in cross 2 (GNR-3 X IET-25446), for plant height in cross 2 (GNR-3 X IET-25446), for grain yield per plant in cross 4 (IET-15429 X IET-25453), for harvest index in cross 2 (GNR-3 X IET-25446), cross 3 (GNR-5 X IET-25471) and cross 4 (IET-15429 X IET-25453), for amylose content in cross 1 (NAUR-1 X IET-25457), for zinc content in cross 1 (NAUR-1 X IET-25457), for leaf area in cross 3 and for chlorophyll content in cross 3 (GNR-5 X IET-25471) indicated that involvement of additive, dominance as well as epistasis interaction for controlling this trait. The duplicate epistasis was observed in almost all traits except grains per panicle in cross 2 (GNR-3 X IET-25446), making it difficult to fix genotypes with increased level of character manifestation because the opposite effect of one parameter would be cancelled out by the negative effect of another parameter.
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