AGROMORPHOLOGICAL AND NUTRACEUTICAL CHARACTERIZATION OF PORTULACA (Portulaca oleracea L.) ACCESSIONS.
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Date
2019-09-30
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K.R.C COLLEGE OF HORTICULTURE, ARABHAVI (UNIVERSITY OF HORTICULTURAL SCIENCES, BAGALKOT)
Abstract
The investigation on “Agromorphological and nutraceutical characterization of portulaca (Portulaca oleracea L.)accessions”. was conducted in the field of Vegetable Science of Kittur Rani Channamma College of Horticulture, Arabhavi. Twenty five genotypes collected from different parts of Karnataka were evaluated in randomized block design with three replications during Rabi 2018.
The analysis of variance revealed highly significant (both at P=0.01 and P=0.05) difference among the genotypes for all the characters studied indicating the higher magnitude of variability in the germplasm.
The very high estimates of heritability coupled with high values of genetic advance over per cent mean (GAM) were observed for traits such as plant height, leaf area, number of leaves, number of branches, number of nodes, number of inflorescence, number of flowers per plant, secondary branches, plant spread E-W, plant spread N-S, stem girth, 1000 seed weight, fresh weight of plant, dry weight of plant, foliage yield per plant, indicates predominance of additive components for these traits and hence direct selection would be more effective in improving these traits.
The results on correlation and path analysis revealed high positive and significant association of foliage yield per plant with characters viz., plant height, leaf area, stem girth, fresh weight of plant, dry weight of plant, number of leaves, number of branches per plant and these characters also had high direct and indirect effect on foliage yield per plant. Hence direct selection for these traits would be more useful in the improvement of yield per plant.
Based on Mahalonobi’s D2 analysis, 25 genotypes were grouped into 7 clusters. The cluster I showed maximum intra-cluster distance (D2 = 222.78), whereas, the maximum inter cluster distance was observed between cluster VI and VII (D2 =1093.79). Among the 21 characters studied, plant spread N-S content (28.33%) contributing maximum to genetic diversity. Top five genotypes viz., HUB-5, HUB-8, HUB-11, HUB-20 and HUB-25 were recorded high foliage yield per plant and quality parameters. Therefore, these genotypes can be further assessed for their stability.
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