SURVEY, EVALUATION, COLLECTION AND MULTIPLICATION OF RED JACKFRUIT (Artocarpus heterophyllus L.) TYPES GROWN UNDER SOUTHERN DISTRICTS OF KARNATAKA
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Date
2019-08
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University of Horticultural Sciences, Bagalkot. (College of Horticulture, Bengaluru).
Abstract
The study entitled “Survey, evaluation, collection and multiplication of red jackfruit (ArtocarpusheterophyllusLam.) types grown under Southern districts of Karnataka” was conducted during 2018-19. The survey was done in five districts and selected 23 red type jack trees for characterization. Among them, six were old age (> 40 years), 13 of medium age (20-40 years) and four were young age (< 20 years) with varied canopy shape. The canopy spread was maximum (NS -17.5 m, EW - 18.00 m) in ABS - 1 and minimum (NS - 2.3 m and EW - 2.5 m) in MYC-1. HSK-17 recorded maximum fruit length of 36.00 cm and width of 26.00 cm. The genotype ABS-1 recorded highest number of fruits per tree (90), highest yield (1080 kg per tree), highest fruit weight (12.00 Kg), fake mass (5.36 kg), flake per cent (44.63 %), maximum bulb weight (45.25 g), bulb mass (5.68 kg) and lower seed weight (2.58 g). The highest number of bulbs were observed in HGN-1 (188). The maximum bulb length and width was recorded in HSK-17, BHB-1 and BKH-3 (8.10 cm and 5.43 cm, respectively). The maximum instrumental colour value (a*) red (23.4), total carotenoids (3.45 mg /100g) and antioxidants (15.72 mg AAE 100-1g) were recorded in MDS-1. The highest moisture content (78.75 %), titrable acidity (0.47 %) and sugar acid ratio (97.40) was observed in MAK-1, KTC-4 and MHK-1, respectively.Significantly higher TSS (35.00 °B), total sugar (31.73 %) and reducing sugar (16.78 %) was recorded in the genotype HGN-1. Softwood grafting of elite 15 genotypes on six month old rootstocks showed graft success of 40.67 % (ABS-1) at 90 days after grafting and survivability percentage of 71.67 % (ABS-1) at 120 days after grafting. Other parameters such as number of leaves, sprouts, height and girth recorded significant difference.