Selection and characterization of superior genotypes from seedling tree population of mango (Mangifera indica L.) in Himachal Pradesh
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Date
2016
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UHF,NAUNI
Abstract
ABSTRACT The present study “Selection and characterization of superior genotypes from seedling tree population of mango (Mangifera indica L.) in Himachal Pradesh” aimed to assess variation among already existing mango trees of seedling origin. A total of 81 healthy and bearing mango trees of seedling origin were marked across mango growing areas of Kangra and Hamirpur districts of Himachal Pradesh during 2013-15. Marked trees were observed to be erect to spreading in growth habit, oblong to semi-circular in shape of crown having sparse to dense foliage density ranges of tree height (7.3-34.7 m), trunk girth (0.65-4.1 m) and crown diameter (2.8-36.8 m). During „on‟ year yield ranged from 5.4-374.3 kg/tree with efficiency of 0.0056-0.203 kg/cm2. But in „off‟ year it is ranged from 0.0-21.41 kg/tree with an efficiency of 0.0-0.0184 kg/cm2. Low variation witnessed in various leaf and floral characters. None of the marked trees was reported to be regular bearer. Physical characters like fruit dimensions, fruit weight, fruit volume, stone weight, stone length and width, stone thickness, pulp weight, peel weight, skin thickness, edible and non-edible portion per cent, stone:pulp, peel:pulp and TSS were 13.98-80.58 cm2, 27.55-169.12 g, 31.50-178.83 ml, 6.34-40.31 g, 17.78-71.47 mm, 10.95-51.28 mm, 14.83-37.26 mm, 14.04-112.00 g, 6.1627.03 g, 0.867-2.95 mm, 48.10-66.21 per cent, 33.79-51.90 per cent, 0.353-0.561, 0.150.547 and 8.45-18.37 ºBrix respectively. Out of 81 mango seedling trees studied 11 trees were designated as „elites‟ based upon overall distinct attributes. These selections excel in one or more horticulturally desirable traits and have been vegetatively propagated for field conserved as a part of elite germplasm conservation. Sensory evaluation of fruit flavours, aroma, texture and taste of all 11 mango seedling selections was carried out by panelist. Also, the specific consumptive use (table, pickling or sucking) of each of the mango selections has been worked out. On the whole, the present study has resulted in some elite mango selections of indigenous origin representing a valuable genepool for use in future.
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