ESTIMATES OF GENETIC VARIABILITY, HERITABILITY AND GENETIC ADVANCE FOR YIELD AND YIELD COMPONENT TRAITS IN THERMO TOLERANT TOMATO (Solanum lycopersicum L.) GENOTYPES

MANISH KUMAR¹*, R.K. YADAV², RAJEEV K. YADAV³, T.K. BEHERA⁴, AKSHAY TALUKDAR^5
1Division of Vegetable Science, ICAR-Indian Agricultural Research Institute, New Delhi, 110012
²Division of Vegetable Science, ICAR-Indian Agricultural Research Institute, New Delhi, 110012
³Division of Vegetable Science, ICAR-Indian Agricultural Research Institute, New Delhi, 110012
⁴Division of Vegetable Science, ICAR-Indian Agricultural Research Institute, New Delhi, 110012
⁵Division of Genetics and Plant Breeding, ICAR-Indian Agricultural Research Institute, New Delhi, 110012
* Corresponding Author : imanishkumar91@gmail.com

Received : 30-12-2016     Accepted : 05-01-2017     Published : 12-01-2017
Volume : 9     Issue : 2       Pages : 3640 - 3642
Int J Agr Sci 9.2 (2017):3640-3642

Keywords : Solanum lycopersicum, Thermo tolerance, Variability, Heritability, Genetic advance
Academic Editor : Shaili Kumari, Kattula Nagaraju
Conflict of Interest : None declared
Acknowledgements/Funding : The Author would like to acknowledge the financial support of ICAR-IARI fellowship, during the M.Sc. research programme to conduct this experiment
Author Contribution : Manish Kumar -conception and design of the work, data collection, data analysis and interpretation, drafting the article, critical revision of the article, final approval of the version to be published and acted as corresponding author

Twenty one diverse thermo tolerant tomato genotypes were evaluated to estimate variability, heritability and genetic advance over mean for fruit yield and component characters. Analysis of variance revealed highly significant mean sum of square due to treatment for all the traits suggested thereby the substantial amount of genetic variability was existed in the material under study. Phenotypic coefficient of variation (PCV) was higher than the corresponding genotypic coefficient of variation (GCV) in all the morphological traits under study and the GCV was very close to PCV for most of the characters indicating a highly significant effect of genotype on phenotypic expression indicating ample scope for selection of genotypes from available germplasm for these traits. High heritability in combination with high genetic advance as per cent over mean was recorded in yield per plant, fruit pericarp thickness and fruit equatorial diameter explaining that these characters are governed by additive gene action which is crucial in selection.