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 under taken with a view to estimate the extent of heterosis, per se performance, combining ability. The hybrids were attempted by adopting line x tester mating design among 15 inbred lines and 3 testers in maize (Zea mays L.) during Rabi 2015. These were evaluated during Kharif 2016 and Rabi 2016-17 in three environments in randomized block design with three replications. Data were recorded for fifteen traits. Analysis of variance revealed that mean squares due to genotypes x environments and its components viz., parents x environments, crosses x environments and parents v/s crosses x environments were significant for majority of the characters. This indicated the presence of considerable amount of variability in the present set of genotypes. An overall per se performance indicated that parental line L10 exhibited maximum mean for grain yield per plant (88.20g) along with maximum mean for harvest index (39.32%) and minimum mean value for days to 75 per cent brown husk (104.56 days). The hybrid L2 x T1 exhibited maximum mean value for grain yield per plant (163.13 g/plant) and exhibited maximum estimate of significant economic heterosis in E1 (36.12%), E2 (12.47%), E¬3 (34.58%) and on pooled basis (28.29%) indicating dominance of genes for higher grain yield per plant. This hybrid also showed significant estimate of economic heterosis for grain protein content in E1 (6.40 %), E2 (3.95 %) and over the environment (4.41 %). Out of 45 hybrids five best hybrids which exhibited positive significant sca effects for grain yield per plant are viz., L2 x T1 , L7 x T2, L10 x T3, L1 x T3 and L9 x T1. Hybrid L2 x T1 also exhibited higher magnitude of economic heterosis with higher mean performance. These hybrids L2 x T1, L7 x T2, L10 x T3, L1 x T3, and L9 x T1 were crosses between poor x good gca effects of parent for grain yield per plant.
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