VARIABILITY AND CHARACTER ASSOCIATION STUDIES OF CITRUS SPECIES AND GENOTYPES UNDER SUBTROPICAL CONDITIONS OF H.P.
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Date
2014
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UHF,NAUNI
Abstract
ABSTRACT
The present investigations entitled “Variability and character association analysis of citrus species
and genotypes under subtropical conditions of H.P.’’ were carried out at the Experimental Orchard, Regional
Horticulture Research Station (RHRS),Dhaulakuan, District Sirmour (HP) and the Department of Fruit Science,
Dr YS Parmar University of Horticulture and Forestry Nauni, Solan (HP) during 2012-13 to 2013-2014. The five
experiments were laid out in RBD (four replications in mandarin and three in sweet orange), T-statistics (five
replications each for lime and grapefruit) and Descriptive statistics (ten replication for lemon) design. Evaluation
of five citrus species and 18 cultivars were carried out for plant growth characters, flowering duration, pollen
viability, germinability, anthesis and anther dehiscence were determined. Pollen viability in mandarins, sweet
orange, lime, grapefruit and lemon cultivars was highest in ‘Kinnow’ (80.85 %), Jaffa (75.53 %), ‘Baramasi lime’
(85.42 %), ‘Ruby Red’ (83.57 %) and ‘Kagzi Kalan’ (70.44 %). Fruit characters namely fruit size, colour, peel
thickness, seed number per fruit, seed length, seedbreadth, TSS, total sugar, titratable acidity, Vitamin-C, juice
per cent and yield characters like fruit weight, number of fruit/tree and yield per tree were observed. Variability
studies indicated that maximum coefficient of variability was observed for leaf area, seed number per fruit, peel
thickness and fruit yield per tree whereas heritability was for leaf area, fruit breadth, TSS, and seed number per
fruit. Yield per plant was positively and significantly associated with traits like leaf area, peel thickness, fruit
breadth and weight, whereas path-coefficient analysis shows that leaf area, peel thickness, fruit breadth, weight
and acidity show maximum positive direct effect on the fruit yield. Hence, on the basis of present studies it is
concluded that ‘Kinnow’ (Mandarin), ‘Mosambi’ (Sweet orange) ‘Baramasi lime’ (Lime), ‘Ruby
Red’(Grapefruit), ‘Kagzi Kalan’ (Lemon) performed best for most of the horticultural traits and are best suited for
commercial cultivation under subtropical climate ofHimachal Pradesh.
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