STUDIES ON GENETIC VARIABILITY IN APPLE (Malus × domestica Borkh.)

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dc.contributor.advisorDOGRA, R K
dc.contributor.authorKUMAR, LOKENDER
dc.date.accessioned2020-01-09T10:46:07Z
dc.date.available2020-01-09T10:46:07Z
dc.date.issued2019-12
dc.description.abstractABSTRACT The present investigation entitled “Studies on genetic in apple (Malus × domestica Borkh.)” was carried out at Regional Horticultural Research and Training Station Bajaura, Seobagh (HP) during 2018-2019 with the objective of studying the variability in different apple cultivars and to assess the association among yield and other traits for quantification of promising cultivars for future use. Twelve cultivars of apple namely, Red Chief, Vance Delicious, Oregon Spur II, Super Chief, Scarlet Gala, Gale Gala, Red Delicious, Top Red, Scarlet Spur Red Delicious, Early Red One, Red Fuji and Gold Spur were evaluated for their plant growth, floral, fruiting and chemical characteristics. Analysis of variance showed significant differences among all the genotypes for all the characteristics under study viz., tree height, tree spread, trunk girth, annual shoot growth, tree volume, leaf area, bud burst, first flower open, full bloom, petal fall, duration of flowering, fruit shape, bearing habit, fruit colour, fruit set, fruit drop, fruit length, fruit breadth, fruit weight, fruit volume, yield per tree, yield efficiency, total soluble solids, fruit firmness, titratable acidity, sugaracid ratio, total sugars, reducing sugars and non-reducing sugars. The genotypes Scarlet Spur Red Delicious followed by Red Chief, Super Chief were found promising for fruit length, fruit breadth, fruit weight, fruit volume, titratable acidity and non-reducing sugars whereas Red Delicious V-22 was found promising for yield per plant (kg). A high phenotypic and genotypic coefficient of variation was recorded for tree volume. High heritability coupled with high genetic gain was obtained for trunk girth, tree spread, tree volume, titratable acidity, non-reducing sugars sugaracid ratio, fruit volume, fruit set and fruit drop. High heritability coupled with moderate genetic gain was obtained for leaf area, total soluble solids, total sugars, reducing sugars, fruit weight and fruit firmness, thereby indicating selection of these traits for crop improvement. A highly positive and significant correlation coefficient of yield per plant was observed with annual shoot growth followed by tree height, trunk girth, tree spread, tree volume and leaf area at both phenotypic and genotypic levels. Maximum positive direct effect cited towards yield were contributed by tree height followed by average leaf area, trunk girth, fruit firmness, yield efficiency, fruit breadth, tree spread, fruit weight, fruit volume and duration of floweringen_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810140082
dc.keywordsgenetic,apple, plant growth,yield efficiency, fruit breadth, tree spreaden_US
dc.language.isoenen_US
dc.pages66en_US
dc.publisherUHF,NAUNIen_US
dc.subFruit Scienceen_US
dc.subjectnullen_US
dc.themegenetic,apple, plant growth,yield efficiency, fruit breadth, tree spreaden_US
dc.these.typeM.Scen_US
dc.titleSTUDIES ON GENETIC VARIABILITY IN APPLE (Malus × domestica Borkh.)en_US
dc.typeThesisen_US
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