GENOTYPE x ENVIRONMENT INTERACTION FOR YIELD AND ITS ATTRIBUTING TRAITS IN SINGLE CROSS HYBRIDS OF MAIZE (Zea mays L.) IN SOUTHERN KARNATAKA

PUTTARAMANAIK¹*, R. PAVAN², NAGABHUSHANA³, H.B. HEMAREDDY⁴, H.C. LOHITHASWA^5
1All India Coordinated Research Project on Maize, Zonal Agricultural Research Station, V. C. Farm, Mandya.
²Department of Genetics and Plant Breeding, University of Agricultural Sciences, GKVK, Bengaluru, Karnataka 560065
³Department of Genetics and Plant Breeding, University of Agricultural Sciences, GKVK, Bengaluru, Karnataka 560065
⁴Department of Genetics and Plant Breeding, University of Agricultural Sciences, GKVK, Bengaluru, Karnataka 560065
⁵Monsanto Research Center, Bengaluru, Karnataka
* Corresponding Author : putnic_vcf@rediffmail.com

Received : 09-06-2016     Accepted : 22-11-2016     Published : 30-11-2016
Volume : 8     Issue : 58       Pages : 3231 - 3235
Int J Agr Sci 8.58 (2016):3231-3235

Keywords : Maize, Hybrids, Genotype xEnvironment Interaction, Additive
Academic Editor : Shrvan Kumar, Parmeshwar Kumar Sahu, Stuti Mishra, Monpara B A
Conflict of Interest : None declared
Acknowledgements/Funding : Authors acknowledge the financial support provided by the ICAR, New Delhi, for carrying out the research
Author Contribution : Puttaramanaik, Pavan, Nagabhushana and Hemareddy evaluated the hybrids, Pavan analyzed the data and Puttaramanaik, Pavan and Lohithaswa wrote the paper

The present study was undertaken to evaluate newly developed maize hybrids in four locations belonging to three different zones of southern Karnataka in order to identify high yielding and stable hybrid. Analysis of variance was highly significant for hybrids and environments for all the traits indicating differential response of the hybrids to varying environments. The variance due to environment (linear) was significant for all the characters indicating that environmental effects were additive. The pooled deviation was also significant for all the characters except days to 50 per cent pollen shedding, days to 50 per cent silking, kernels per row and kernel rows per ear indicating that non-linear component of hybrid× environment interaction was predominant. Stability parameters for grain yield per plant revealed that hybrids viz., CM-202 × NAI-116, SKV-11 × NAI-116, CM-202 × SKV-11, CM-202 × CM-500 and SKV-11 × CM-202 had higher mean performance. Out of 12 hybrids, SKV-11 × NAI-116 recorded higher grain yield per plant, unit regression coefficient and deviation from regression was found non-significant which indicated that the hybrid was found promising in all environments.