MODE OF ACTION OF GENES CONTROLLING ANTHESIS-SILKING INTERVAL (ASI) AND GRAIN YIELD AND ITS COMPONENT TRAITS IN MAIZE

NEELAVVA KONANAVAR¹*, E. GANGAPPA², S. RAMESH³, M.P. PAVAN^4
1Department of Genetics and Plant Breeding, College of Agriculture, University of Agricultural Sciences, Bengaluru, Karnataka, 560065, India
²Department of Genetics and Plant Breeding, College of Agriculture, University of Agricultural Sciences, Bengaluru, Karnataka, 560065, India
³Department of Genetics and Plant Breeding, College of Agriculture, University of Agricultural Sciences, Bengaluru, Karnataka, 560065, India
⁴Department of Genetics and Plant Breeding, College of Agriculture, University of Agricultural Sciences, Bengaluru, Karnataka, 560065, India
* Corresponding Author : k.neelamma9@gmail.com

Received : 06-12-2016     Accepted : 09-12-2016     Published : 18-12-2016
Volume : 8     Issue : 61       Pages : 3410 - 3413
Int J Agr Sci 8.61 (2016):3410-3413

Keywords : Maize, Triple Test Cross, Epistasis, Additive Variance, Dominance Variance
Academic Editor : Vaijayanthi P V, Dr Ali El-saied Sharief
Conflict of Interest : None declared
Acknowledgements/Funding : The author gratefully acknowledge Genetics and Plant Breeding department, UAS, GKVK, Bengaluru, for providing facility to carry out this research work
Author Contribution : The present reported work is a part of PhD thesis research

Triple test cross analysis was used to detect epistasis for eleven quantitative traits in maize. Analysis of variance for detection of epistasis revealed the presence of epistasis for all traits studied. Additive × additive (i type) digenic epistasis was highly significant for the traits such as days to tasseling, days to silking, cob width, kernel rows cob-1 and shelling per cent except ASI, cob length, kernels row-1, grain yield plot 1 and 100 grain weight. Both additive × dominance (j type) and dominance × dominance (l type) epistasis were significant for all characters. The degree of dominance was less than one for all the traits, indicating the presence of partial dominance in inheritance of all the traits. The correlation coefficient of sums and differences and F-value were found non-significant for all the traits. The magnitude of additive components was higher compared to dominance components for all traits.