STUDIES ON GENETIC VARIABILITY, DIVERGENCE AND CHARACTER ASSOCIATION IN VEGETABLE AMARANTHUS (Amaranthus tricolor L.)
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Date
2018-09-12
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K.R.C. COLLEGE OF HORTICULTURE, ARABHAVI (UNIVERSITY OF HORTICULTURAL SCIENCES, BAGALKOT)
Abstract
Amaranthus (Amaranthus tricolor L.) is a popular leafy vegetable and it is a
rich source of vitamin- A, calcium, iron and vitamin-C. The investigation on “Studies
on genetic variability, divergence and character association in vegetable amaranthus
(Amaranthus tricolor L.)” was conducted in the field of Vegetable Science, Kittur
Rani Channamma College of Horticulture, Arabhavi, Gokak (Karnataka). The
experiment was laid out in RCBD design with two replications. The treatment
included twenty five genotypes collected from various sources were evaluated during
kharif season of 2017.
The analysis of variance revealed highly significant 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 leaf area, number
of spikes and leaves per plant, iron, vitamin-C, magnesium, calcium, copper, phenols
and oxalate content of leaves. This indicates predominance of additive components
for these traits and hence direct selection would be more effective in improving these
traits.
The results of correlation and path analysis revealed that leaf yield per plant
had maximum significant positive correlation with number of leaves per plant, stem
girth, number of branches per plant, number of spikes per plant and spike length.
Number of leaves per plant had maximum direct and indirect effect on leaf yield
plant-1. Hence direct selection for these traits would be more useful in the
improvement of yield plant-1.
Based on Mahalonobi’s D2 analysis, 25 genotypes were grouped into 4
clusters. The intra-cluster distance was found maximum in cluster-IV followed by
cluster-III.
Top five genotypes viz., HUB-19, HUB-18, HUB-20, HUB-1 and Arka
Samraksha were identified on the basis of their per se performance for leaf yield
plant-1 these five genotypes were further assessed for their stability.
Description
TH-653
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