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2018 - 201912020 - 20221
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Subject: Fruit Science × Author: BODH, SUMAN ×
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    ThesisItemOpen Access
    EXPLORATION OF BUD SPORT DIVERSITY IN THE APPLE (Malus × domestica Borkh.) ORCHARDS OF HIMACHAL PRADESH FOR GENETIC IMPROVEMENT
    (UHF,NAUNI, 2022-12) BODH, SUMAN; DOGRA, R K
    ABSTRACT The present investigation was undertaken during 2019-22 to identify bud sports in apple. Field surveys of existing apple plantation in the districts of Kullu, Mandi, Shimla, Kinnaur and Lahaul & Spiti in Himachal Pradesh were carried out during 2019-20.Based upon pre-selection criteria such as bearing habit, time of colour development and time of fruit maturation, screening of apple trees was done. Feedback information was also collectedfrom the orchardists/grower and the identified trees were marked for systematic evaluation studies. In all, 17 bud sports were identified. Fourteen of them were early colouring (HK, SK 1, SK 2, SN 1, SN 2, TM 1, TM 2, KM, JM 1, KP 1, KP 2, KP 3, ULS 1, ULS 2) in which colour development started 2-3 weeks earlier than in their mother trees. Two bud sports (RDM and JM 2) were late maturing as well as late in fruit peel colour development. One bud sport (KK) showed distinctive fruit peel colour. Apart from the distinguishing character for which the bud sports were identified, they also differed infruit shape, fruit size, fruit firmness, TSS and acidity. The distinct morpho-physicochemical variation observed in bud sports were validated by molecular marker studies. The three bud sports (HK, KP 3 and ULS 1) exhibited genetic variances among identified bud sports with their mother plants by using SSR markers. Theidentified bud sports have been vegetatively propagated for further studies in future.
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    ThesisItemOpen Access
    CHARACTERIZATION AND EVALUATION OF SOME PEACH [Prunus persica (L.) Batsch.] ACCESSIONS
    (UHF,NAUNI, 2018-09) BODH, SUMAN; THAKUR, DINESH SINGH
    ABSTRACT The present investigation entitled “Characterization and evaluation of some peach [Prunus persica (L.) Batsch.] accessions” was carried out in the field gene bank of National Bureau of Plant Genetics Resources, Regional Station Phagli, Shimla. Sixteen peach genotypes namely Shan-i-Punjab, Kanto-5, Fertilia, Yum Yong, Flordasun, Summerglo, Suncoast, FlordaBelle, Ambri, Early Redhaven, Okubo, Early Amber, Fire Prince, Belle of Georgia, Hale Haven, Nishiki were evaluated for their tree, foliage, floral and fruit characters. Flordasun recorded maximum plant height (6.13 m) and Minimum (2.07 m) in Nishiki. The fruit yield was maximum (24.66 kg/plant) in Shan-i-Punjab and minimum (11.00 kg/plant) in Flordasun and Belle of Georgia. Shedding of leaves started from 12th November (Suncoast) to 11th December (FlordaBelle). Time of full bloom extended from as early as (29th January) in FlordaBelle to (20th March) in Fertilia and Hale Haven. Pollen viability as tested in acetocarmine and in erythrosin B ranged from 91.35 per cent in Suncoast to 98.47 per cent in Belle of Georgia and 58.68 per cent in Kanto-5 to 93.90 per cent in FlordaBelle, respectively. In vitro pollen germination was maximum (84.33%) in Flordasun and minimum (11.54%) in Yum Yong under 10 per cent sucrose solution. Pollen germination under 15 per cent sucrose solution was maximum (74.22%) in FlordaBelle and minimum (11.56%) in Ambri. Heaviest fruits were found in Suncoast (203.83 g) and lightest fruits were observed in Ambri (72.33 g). Fruit firmness varied from 2.05 kg/cm2 in Shan-i-Punjab to 6.56 kg/cm2 in Hale Haven. Maximum pulp/stone ratio (43.39) was found in Flordasun and minimum (8.87) in Hale Haven. TSS content of fruit was maximum (13.43oB) in FlordaBelle and minimum (8.10oB) in Ambri. Titratable acidity was maximum (1.64%) in Summerglo and minimum (0.20%) in Belle of Georgia. Total sugars were maximum (10.53%) in Fertilia and minimum (6.25%) in Belle of Georgia. From the present investigations it may be concluded that Summerglo, Shan-i-Punjab, FlordaBelle, Flordasun, Yum Yong and Hale Haven may be suggested for cultivation in conditions of Himachal Pradesh for their better quality.