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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 (2019)
[Effective from January 1, 2019]
For more details click here

ICV 2017: 100.00
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2017: 100.00
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 2017: 100.00
NAAS RATING 2018: 5.38

Int.J.Curr.Microbiol.App.Sci.2018.7(4): 3084-3090
DOI: https://doi.org/10.20546/ijcmas.2018.704.350


Genetic Analysis of Resistance to Northern Leaf Blight in Maize (Zea mays L.) Reveals its Population Specificity
Shridhar Hegde1*, M. Kumar2, N. Meenakshi Ganesan3, C. Chinnusamy4, A.S. Krishnamoorthy5 and Mahantesh Gangashetti6
1Centre for Plant Breeding and Genetics, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India
2Department of Cotton
4Department of Agronomy
5Department of Pathology, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India
3Directorate of Research, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India
6Pioneer Hi-Bred Pvt. Ltd., Kallinayakanahalli 561 213, Gauribidanur, Chikkaballapur, Karnataka, India
*Corresponding author
Abstract:

The present investigation was conducted to understand the genetics of resistance to northern leaf blight in maize through six generation mean analysis in three crosses viz., PH234 X PH84K, PHM6M X PH17H and PHM6M X PHY0Z during kharif 2016-17. The scaling tests and joint scaling tests indicated the inadequacy of additive-dominance model and showed the presence of epistatic gene effects in all the three crosses for northern leaf blight. Further study revealed the importance of additive, dominance and additive × additive gene effects in the expression of the disease. The magnitude of dominance effect was more compared to additive gene effects. Duplicate gene interaction was evident in the inheritance of northern leaf blight resistance in all the crosses. The study also revealed that genetic architecture of northern leaf blight resistance was population specific. Both, additive and non-additive components were found important suggesting reciprocal recurrent selection as more effective for developing northern leaf blight resistant maize genotypes.


Keywords: Maize, Northern leaf blight, Generation means, Duplicate gene interaction, Reciprocal recurrent selection
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How to cite this article:

Shridhar Hegde, M. Kumar, N. Meenakshi Ganesan, C. Chinnusamy, A.S. Krishnamoorthy and Mahantesh Gangashetti. 2018. Genetic Analysis of Resistance to Northern Leaf Blight in Maize (Zea mays L.) Reveals its Population Specificity.Int.J.Curr.Microbiol.App.Sci. 7(4): 3084-3090. doi: https://doi.org/10.20546/ijcmas.2018.704.350