DIALLEL ANALYSIS IN OKRA [Abelmoschus esculentus (L.) Moench]
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Date
2017-07
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K.R.C. COLLEGE OF HORTICULTURE, ARABHAVI (UNIVERSITY OF HORTICULTURAL SCIENCES, BAGALKOT)
Abstract
The investigation on diallel analysis in okra was carried out during the year 2016-17 at Vegetable Science unit, Kittur Rani Channamma College of Horticulture, Arabhavi. The experimental material comprised of eight parents and 28 cross combinations produced through half-diallel fashion and two commercial checks (Arka Anamika and MHY-10). All the crosses were evaluated along with the parents and the commercial checks in randomised block design with two replications. Magnitude of heterosis over the commercial check (MHY-10) was high in the desirable direction for number of branches per plant (58.33 %), number of seeds per fruit (40.09 %), number of nodes on the main stem (25.04 %), plant height at 60 DAS (24.21 %), internodal length at 60 DAS (-24.10 %), total yield per plant (20.35 %), yield per plot (20.25 %), yield per hectare (20.21 %) and number of leaves at 90 DAS (20.14 %). Magnitude of standard heterosis in the desirable direction over the commercial check (MHY-10) was medium to low for plant height at 45 DAS (18.31 %), plant height at 90 DAS (18.11 %), number of fruits per plant (17.35 %), number of leaves at 60 DAS (16.15 %), average fruit weight (14.50 %), days to 50 per cent flowering (-10.10 %), number of leaves at 45 DAS (9.31 %), fruit diameter (8.34 %), fruit length (6.79 %), days to first flowering (-5.00 %) and number of ridges on fruit surface (-1.96 %). Maximum standard (MHY-10) heterosis for yield per hectare was observed in the cross KO1606 x KO1608 (20.21 %) followed by KO1602 x KO1608 (14.53 %) and KO1603 x KO1606 (13.25 %).
The crosses KO1601 x KO1605 and KO1603 x KO1606 were identified as the good specific combiners for yield per hectare and the parents KO1606 and KO1608 were identified as the good general combiners for yield and yield attributing traits. Studies on combining ability variance revealed that non-additive gene action was predominant for number of nodes on the main stem, plant height at 90 DAS, average fruit weight, internodal length, days to first flowering, number of seeds per fruit and fruit length. Non additive component of genetic variance was slightly higher than additive component for total yield per plant and yield per hectare.
Description
TH600
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