Gene Action and Heterosis Study in Hybrids Derived from New Inbred Lines in Maize (Zea mays L.)  

Udaykumar Kage1 , M.C. Wali2 , Deepa Madalageri3 , Prakash Natikar1 , Prakash Gangashetty1
1. Department od Genetics and Plant Breeding, Univarsity of Agricultural Sciences (UAS), Dharwad, India
2. AICRP on Maize, ARS, Arabhavi, UAS, Dharwad, India
3. Department of Food Science and Nutrition, UAS, Dharwad, India
Author    Correspondence author
Molecular Plant Breeding, 2013, Vol. 4, No. 18   doi: 10.5376/mpb.2013.04.0018
Received: 26 May, 2013    Accepted: 10 Jun., 2013    Published: 13 Jun., 2013
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This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Kage et al., 2013, Gene Action and Heterosis Study in Hybrids Derived from New Inbred Lines in Maize (Zea mays L.), Molecular Plant Breeding, Vol.4, No.18 146-149 (doi: 10.5376/mpb.2013.04.0018)


The present study was conducted to estimate the heterosis for yield and yield related traits in 30 hybrids developed from ten lines crossed with three testers and explore them in commercial breeding. Thirty F1s generated were evaluated and the results shown that the ratio of sca / gca variance revealed that there was preponderance of non additive gene action in the expression of all the traits under study except for days to 50% tasseling and ear girth. Among thirty, three hybrids L2×T1, L1×T2 and L8×T3 showed significant positive standard heterosis over both EH434042 and 900M (Commercial checks). These hybrids can be further tested in large scale and can be released commercially or used as development crosses in developing the inbred lines.

Heterosis; Gene action; Maize (Zea mays L.)
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