ISHS Acta Horticulturae 637: XXVI International Horticultural Congress: Advances in Vegetable Breeding
GENETIC ANALYSIS OF YIELD IN TOMATO BY INVOLVING GENETIC MALE STERILE LINES |
| Authors: | P. Kaur, M.S. Dhaliwal, S. Singh |
| Keywords: | Combining ability, hybrids evaluation, Lycopersicon esculentum Mill., line x tester analysis |
| Abstract:
Thirty-six F1 tomato hybrids developed by involving three genetic male sterile lines and twelve superior performing male parents were grown along with parents and two check hybrids, TH 802 and TH 2312, to study combining ability effects of parents and hybrids. The experiment was laid out in an RBD using three replications and observations were recorded on fruit weight (g), marketable yield (kg/plant) and total yield (kg/plant). The ANOVA for the experimental design revealed significant differences among genotypes, parents, hybrids and parents vs. hybrids. Combining ability analysis revealed the greater importance of additive gene effects for fruit weight and non-additive gene effects for total yield and marketable yield. Among lines, ms 45 was a good combiner for fruit weight and total yield. Among testers I 181, I 183 and S 286 were good combiners for marketable and total yield. These parents are recommended for their utilization in hybridization programme to develop high yielding true breeding lines. The crosses ms 1036 x I 181, ms 1547 x U 301 and ms 45 x I 181 exhibited high SCA effects for total yield. These hybrids also proved significantly higher yielding compared to the two check hybrids and are therefore, recommended for multi-location testing before their commercial use. | |
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