DEVELOPMENT OF F1 HYBRIDS IN RIDGE GOURD [Luffa acutangula (L.)Roxb.]
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Date
2017-09
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K.R.C. COLLEGE OF HORTICULTURE, ARABHAVI (UNIVERSITY OF HORTICULTURAL SCIENCES, BAGALKOT)
Abstract
The present study was carried out at Vegetable Science unit of Kittur Rani Channamma College of Horticulture, Arabhavi, Belagavi (Karnataka) in the year 2016-17. Thirty crosses were derived from 10 lines and three testers which were evaluated in RCBD and data was subjected to line x tester analysis. The magnitude of heterosis over the commercial check (Naga) was high in the desirable direction for vine length at 45 DAS (60.03%), vine length at 90 DAS (39.88%), number of leaves at 90 DAS (48.70%), number of branches at 45 DAS (61.54 %), number of branches at 90 DAS (40.38 %), nodes to first male flowering (-34.09 %), sex ratio (-50.87 %), fruit length (47.68 %), fruit diameter (22.31 %), per cent fruit set (66.85 %), rind thickness (69.70 %), flesh thickness (48.98 %), number of fruits per vine (20.87 %), average fruit weight (90.30 %), fruit yield per vine (143.01 %), fruit yield per plot (128.03%) and fruit yield per hectare (128.01%). Maximum standard heterosis was found in crosses DWD local x CO-1 (128.01%), ERG-2 x Deepthi (119.09%), ERG-1 x Deepthi (112.09%), ERG-2 x PSN (85.97 %) and DMRG-25 x Deepthi (61.41%) for total yield per hectare .
The cross DWD local x CO-1, ERG-1 x Deepthi, IC-92637 x Deepthi, HSN local x CO-1 and DMRG-25 x Deepthi were identified as good specific combiners and parents DWD local, ERG-2, ERG-1 and DMRG-1 were identified as good general combiners for total yield and yield attributed traits. Studies on combining ability variances revealed that non additive gene action was predominant for the characters vine length at 45 and 90 DAS, number of branches at 45 and 90 DAS, number of leaves at 45 and 90 DAS, days to first male flowering, node to first male flowering, days to first harvest, days to last harvest, sex ratio, fruit length, fruit diameter, number of fruits per vine, fruit yield per vine, fruit yield per plot, fruit yield per hectare, per cent fruit set, flesh thickness and rind thickness and these characters could be further improved through recurrent selection or heterosis breeding. Additive gene action was predominent for average fruit weight and node to first female flowering. Thus these characters can be improved by simple selection.
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TH619
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