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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2020)
[Effective from January 1, 2020]
For more details click here

ICV 2019: 96.39
Index Copernicus ICI Journals Master List 2019 - IJCMAS--ICV 2019: 96.39
For more details click here

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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

Int.J.Curr.Microbiol.App.Sci.2020.9(12): 1435-1459
DOI: https://doi.org/10.20546/ijcmas.2020.912.172


Analysis of Heterosis and Combining Ability for Yield and Yield Contributing traits in Medium Maturity Hybrids of Maize (Zea mays L.)
Deshraj Gurjar1* and Rambabu Dubey2
1Lovely Professional University Phagwara, Punjab, India
2Rajasthan college of Agriculture, Mpuat, Udaipur, India
*Corresponding author
Abstract:

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.


Keywords: Maize, Line X Tester Analysis, Per Se Performance, Combining Ability and Heterosis
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How to cite this article:

Deshraj Gurjar and Rambabu Dubey. 2020. Analysis of Heterosis and Combining Ability for Yield and Yield Contributing traits in Medium Maturity Hybrids of Maize (Zea mays L.).Int.J.Curr.Microbiol.App.Sci. 9(12): 1435-1459. doi: https://doi.org/10.20546/ijcmas.2020.912.172