Analysis of combining ability for yield, yield components and quality characters in tomato (Lycopersicon esculentum Mill.)
2008
Chishti, S.A.S. (Vegetable Research Inst., AARI, Faisalabad (Pakistan)) | Khan, A.A. (Vegetable Research Inst., AARI, Faisalabad (Pakistan)) | Sadia, B. (Vegetable Research Inst., AARI, Faisalabad (Pakistan)) | Khan, I.A. (University of Agriculture, Faisalabad (Pakistan). Dept. of Plant Breeding and Genetics)
A study was conducted at Vegetables Research Institute, AARI, Faisalabad and University of Agriculture, Faisalabad, Pakistan during 2004-05. Plant material comprised 12 parental lines and their 66 F1 hybrids (direct crosses). Observations were recorded for days taken to flowering, number of flowers per cluster, number of fruits per cluster, number of marketable fruits per plant, fruit length, fruit width, fruit weight, fruit yield per plant, pericarp thickness, fruit firmness at red stage; total soluble solids and pH of juice. Analysis of variance revealed highly significant differences among genotypes, parents and hybrids for all characters. Mean squares due to GCA and SCA were significant for all characters. The ratio of sigma2g/ sigma2s indicated that non-additive variance prevailed in genetic determination for most of the characters. None of the parents exhibited good GCA effects for all characters The crosses UC-134 x Roma, 88572 x Lyp No. 1 and Cchaus x Rio Fuego were identified as best combinations on the basis of yield performance
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