COMBINING ABILITY AND HETEROSIS FOR SOME ECONOMIC TRAITS IN TOMATO (Lycopersicon esculentum MILL. ) | ||||
| Journal of Plant Production | ||||
| Article 9, Volume 1, Issue 5, May 2010, Page 757-768 PDF (496.38 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2010.86404 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| H. M. M. Ghobary; K. Y. Ibrahim | ||||
| Veget. Res. Dept., Hort. Res. Inst., Agric . Res. Center, Cairo, Egypt. | ||||
| Abstract | ||||
| Line x tester experiment was conducted to evaluate the performance of 21 hybrids along with 10 parents in tomato. Variance due to genotypes, crosses and lines x testers was significant or high significant for most studied traits. The estimate of variance of gca, sca, their ratio and degree of dominance indicated that the preponderance of non-additive gene action for all the studied traits suggesting that selection might not be made in the early generations and recurrent selection with periodic intercrossing appeared to be the best method. Narrow sense heritability was low for traits i.e., plant height and T.S.S.% and high for fruit shape index , while was moderate for the other studied traits . Contribution of lines towards the total variance was more than that of testers. Based on mean performance and gca effects, line MNS1 and tester Peto 86 were better for yield and its various components. Considering mean performance, sca effects and heterobeltiosis, three hybrids i.e., MNS1 x Peto 86, ClN2498E x Super Marmande and ClN2498E x Peto 86 were superior for yield and recommended for heterosis breeding after further evaluation . | ||||
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