Combining ability estimates for yield and its contributing traits in tomato (Lycopersicon esculentum)
2008
Saidi, M. (Ilam Univ. (Iran). Dept. of Horticulture) | Warade, S.D. (College of Horticulture, Maharashtra State (India)) | Prabu, T. (Mahatma Phule Krishi Vidyapeeth, Maharashtra State (India.). Dept. of Horticulture)
Combining ability of eleven diverse breeding lines/varieties for yield and its contributing characters was evaluated trough a line x tester analysis. The results revealed that- the variances due to lines effects were found significant for number of fruits per plant, days to 50% flowering and height of plant. Mean sum of squares due to testers effects were found significant for number of fruits per plant, average weight of fruits and height of plant. While the variances due to lines x testers effects, were highly significant for all the characters under study. In general, the parental line, M-3-1 and the tester 18-1-1 were found to be the best general combiner for yield per ha, yield per plant, number of fruits per plant, days to 50% flowering and plant height. For yield per ha, yield per plant and number of fruits per plant, the cross M-3-1 x 18-1-1 was the best combination. Analysis of variance for combining ability manifested the predominance of additive gene action for plant height and dominance gene action for yield per ha, yield per plant and number of branches per plant. While, both additive and non-additive gene actions were involved in the expression of number of fruits per plant, average weight of fruits and days to 50% flowering.
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