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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
IJCMAS is now DOI (CrossRef) registered Research Journal. The DOIs are assigned to all published IJCMAS Articles.
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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 2018: 95.39
Index Copernicus ICI Journals Master List 2018 - IJCMAS--ICV 2018: 95.39
For more details click here

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Original Research Articles

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.2018.7(1): 3237-3246
DOI: https://doi.org/10.20546/ijcmas.2018.701.387


Genetic Analysis of Heat Adaptive Traits in Tropical Maize (Zea mays L.)
Krishnaji Jodage1, P.H. Kuchanur1*, P.H. Zaidi3, Ayyanagouda Patil2,Seetharam3, M.T. Vinayan3 and B. Arunkumar1
1Department of Genetics and Plant Breeding, University of Agricultural Sciences,Raichur-584 104, Karnataka, India
2Department of Molecular Biology and Agriculture Biotechnology, University of Agricultural Sciences, Raichur-584104, Karnataka, India
3International Maize and Wheat Improvement Center (CIMMYT) - Asia c/o ICRISAT, Patancheru, Hyderabad-502324, Telangana, India
*Corresponding author
Abstract:

Studies were conducted to determine the gene action for heat adaptive traits and grain yield under heat stress condition by using the hybrids generated in L×T and NCD-II. The results revealed predominance of non-additive gene action for heat stress adaptive traits in both the experiments. Among the parents, ZL135005 and CAL1730 of L×T experiment and ZL132088 and CZL0522 of NCD-II were good general combiners for heat tolerance component traits like leaf firing, tassel blast and also for yield contributing traits and hence these lines could be used for generating pedigree crosses for deriving second cycle in-breds. Hybrids viz., ZL134989×CML470 and ZL135003×CML 470 of L×T; VL1010963× ZL132070 and VL062655×CAL1427 of NCD-II showed desirable specific combining ability effects for maximum number of traits. These hybrids could be taken forward for multi-location testing under heat stress condition. Association studies revealed that plant height (0.199, 0.286) and number of grains per cob (0.458, 0.453) were positively associated with grain yield and ASI (-0.113, -0.107) leaf firing (-0.163) and tassel blast (-0.165) were associated negatively with grain yield. Tassel blast and leaf firing could be considered as negative traits for selection of tropical maize lines /hybrids under heat stress condition.


Keywords: Zea mays L.,Gene action,Heat tolerance, L×T, NCD-II
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How to cite this article:

Krishnaji Jodage, P.H. Kuchanur, P.H. Zaidi, Ayyanagouda Patil, K. Seetharam, M.T. Vinayan and Arunkumar, B. 2018. Genetic Analysis of Heat Adaptive Traits in Tropical Maize (Zea mays L.).Int.J.Curr.Microbiol.App.Sci. 7(1): 3237-3246. doi: https://doi.org/10.20546/ijcmas.2018.701.387