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 |
A line X tester analysis was carried out in maize with nine lines and five tester under two plant population density (optimum planting density and high planting density) at the Govind Ballabh Pant University of Agriculture and Technology, Pantnagar. Combining ability analysis revealed significant variances due to GCA and SCA for most of the characters in both the environments, indicating importance of both additive and non-additive genetic variances. The magnitude of SCA variance was greater than GCA variance for all the characters in all the environments showing preponderance of non-additive variance and suitability of material for hybrid breeding. The GCA effects of the parents indicated that parental lines L1, L4, L8, L9 and testers T2 and T3 in optimum plant population density; lines, L1, L2, L4, L8 and L9 and testers T1, T3 and T4 in high plant population density and lines L2, L4, L8 and L9 and tester T1 in pooled environment were the best combiners. Hybrids L2 x T5, L7 x T1, L3 x T5 and L9 x T2 in optimum plant population density, L2 x T5, L3 x T5 and L8 x T1 in high plant population density and L2 x T5, L8 x T1 and L6 x T1 in pooled environment showed higher SCA effects for grain yield and its contributing traits.
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