Vol. 6, Issue 12 (2017)

Author(s):
Satish Yadav, GC Yadav, Vimlesh Kumar and Dheeraj Yadav

Abstract:
The present investigation was conducted using 36 cross combination obtained by crossing 9 lines with 4 tester in Line × Tester mating design to know the gene effects with to respect to its nature and magnitude for growth, yield and quality characters. The study revealed estimates of sca variance were higher than gca variances for all most of the traits. The value of sca variances were found significant and positive for all the characters. Likewise, positive and significant gca variances were also exhibited by almost all the characters. The value of degree of dominance was more than unity (1) for all the traits except for plant height (0.76), pericarp thickness (0.74), number of fruits per plant (0.83) and ascorbic acid (0.90) and revealed over dominance in 2012 -2013. The value of degree of dominance was more than unity (1) for all the traits except for plant height (0.68) and ascorbic acid (0.83) and revealed over dominance in 2013-2014. Plant height, pericarp thickness and ascorbic acid in fruit exhibited average degree of dominance less than unity (1) indicating partial dominance. These results clearly indicates that in the majority growth, yield quality non-additive gene action were in preponderance practice of exploration of hybrid vigor in tomato.