HETEROSIS AND COMBINING ABILITY STUDY FOR YIELD AND QUALITY ATTRIBUTES IN TOMATO (Solanum lycopersicon L.)
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Date
2012
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Institute of Agricultural Sciences, Banaras Hindu University
Abstract
The present investigation entitled "Heterosis and combining ability study for yield and quality attributes in tomato (Solanum lycopersicon L.)” using Line x tester analysis was carried. The material for the present study comprised five lines, two testers, ten F1 hybrids produced in a line x tester fashion and two commercial checks viz. DVRT-2 and ARTH-3. The experiment was conducted at Vegetables Research Farm, Department of Horticulture, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi during the period of January 2010 to 2012. The observations were recorded for the plant height (cm), days to 50 per cent fruit set, number of flowers per cluster, number of flower per cluster per plant, days to first picking (DAS), days to last picking, number of fruits per plant, locules per fruit, total soluble solids (0Brix), average fruit weight (g), weight of fruit per plant (kg) and total fruit yield (qt/ha). Estimate of GCA effect revealed that lines EC 620478 and EC 620493 for increased and decreased plant height respectively, EC 620496 for total soluble solids and reduced plant height, EC 620510 for days to 50 per cent fruit set and number of fruits per plant, EC 620495 for days to first harvest, days to last harvest, average fruit weight and yield quintal/hectare, Arka Abha for reduced plant height, Bilhai-2 for increased plant height, number of fruits per plant and number of flower clusters per plant were considered good general combiners. Estimate of SCA effects showed that EC 620510 x Bilhai-2 for total yield q/ha, EC 620496 x Bilhai-2 for number of flower clusters per plant, number of fruits per plant and EC 620493 x Arka Abha for number of fruits per plant were considered good specific combiner. In the light of of above investigation it can be concluded that the F1 hybrids EC 620510 x Bilhai-2, EC 620495 x Arka Abha, EC 620478 x Arka Abha and EC 620496 x Arka Abha exhibited higher mean performance and heterosis over check for total yield. These hybrids either surpassed or were at par with the check hybrids for other economic characters. Hence, the above F1 hybrids are recommended for further testing prior to their commercial release.
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Sah, S. K. 2012. Heterosis and combining ability study for yield and quality attributes in tomato (Solanum lycopersicon L.). M. Sc. (Ag.) Thesis, Horticulture, Institute of Agricultural Sciences, BHU, Varanasi.