STUDIES ON CHEMICALLY MANIPULATED REGENERATION CAPACITY AND COMPARATIVE PERFORMANCE OF SOME STRAWBERRY (FRAGARIA x ANANASSA DUCH) CULTIVARS
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Date
2002
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Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu
Abstract
The present study on chemical manipulation in regeneration capacity and comparative performance of some strawberry cultivars, was conducted at Krishi Vigyan Kendra Farm, R.S. Pura, Jammu, during 2000-2001. The whole programme of study was divided into two experiments. Experiment 1 relates to find out the best chemical alongwith its concentration in relation to regeneration of two strawberry cultivars viz. Chandler and Gorella under Jammu plains which were treated through foliar spray in June with several chemicals (GA<sub>3</sub> - 25, 50 & 75 ppm; BAP - 15, 30 & 45 ppm, Urea - 0.5,1.0 & 1.5%, Boron - 50,100,150 ppm and control -water spray. Experiment 2. relates to select ttie best cultivar (s) for commercial cultivation under same condition of Jammu, out of 8 cultivars (Addie, Belrubi, Chandler, Brighton, Confitura, Fern, Gorella and Selva) tested during the course of investigations. Present study reveals that the application of 45 ppm BAP tended to increase the highest number of runner trains/plant (3.97), length of runner train (49.00 cm) and total number of runner (11.89), while its lowest concentration (15 ppm) proved its superiority in respect of number of runners per train (3.70). Average number of leaves/mother (12.58) and runner (7.20), leaf area of mother (49.83 cm<sup>2</sup>) and runner (40.69 cm<sup>2</sup>) plant were registered with the use of 75 ppm GA<sub>3</sub>. The application of 1.5% urea showed the highest photosynthetic effictency (4.33 μg). Other parameters relating to root studies like number of roots in mother (48.93) and runner (39.46) plants were recorded to be the highest with the use of 150 ppm boron. The same concentration of boron also showed the longest roots (17.03cm) next to 45 ppm BAP (17.58cm). In most of the cases, Gorella was statistically superior than Chandler in respect to regeneration capacity under these conditions. In second experiment, Selva cultivar was about one week late in respect to start of flowering as compared to other cultivars. The highest values for number of flowers per plant (16.40) and number of fruits per plant (13.87), fruit length (2.44 cm) alongwith lowest fruit malfomnation (25.56%) were recorded in the Belrubi whereas Gorella showed the highest average fruit weight (7.84 g), yield (81.90 g/plant), total sugars (7.08%) and TSS (9-10%) contents. The fruits of Belrubi were more acidic (0.86%) than other cultivars tested. The organoleptic rating for consumer acceptability was highest with Gorella followed by Belrubi and Chandler. From these results it can be concluded that use of 45 ppm BAP can be useful for regenerating the strawberry in subtropical parts of Jammu region. Gorella is promising cultivar for this zone in respect to regeneration capacity as well as for production. In addition to that, Belrubi and Chandler may also be recommended for commercial cultivation in this region.
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