| dc.description.abstract | Abstract :
Twelve parental lines were crossed in line x tester fashion comprising 8 lines and 4 testers at Research and Development farm of Energypac Agro Ltd. to estimate combining ability in tomato for fruit yield and yield contributing traits. The analysis of variance revealed higher gca variance than sea variance for all the traits except plant height and number of secondary branches per plant indicating the prevalence of additive gene action for the above traits. The lines played major important role towards number of secondary branches per plant (93.13%), number of clusters per plant (92.33%), fruits per plant (95.15%), fruits per cluster (66.03%), average fruit weight (90.20%), fruit length (62.60%), fruit diameter (75.17%), locule per fruits (82.29%), and yield per plant (92.89%) indicating predominant maternal influence for these traits. On the contrary, tester contributed most (13.17%) towards plant height. The contribution of maternal and paternal interactions (line x tester) were found vital only for plant height (79.21%). The line TM-1, OP-female, and RK-101 exhibited highly significant positive gca effects for all the studied traits indicating best general combiner among the tested lines. The crosses TM-1 x Diamond, RK-101 x Salamat, and Overuchi-10 x Roraa-VF were identified as most promising for yield based on sea effects. Hence, these could be used for the exploitation of heterosis for yield and related characters. These best combiners could be utilized in hybrid breeding programme. | en_US |
