CHARACTERIZATION OF DIFFERENT GENOTYPES OF RADISH (Raphanus sativus L.) IN NORTHERN DRY ZONE OF KARNATAKA
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Date
2018-07
Authors
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Journal ISSN
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Publisher
University of Horticultural Sciences, Bagalkot. (KRC College of Horticulture, Arabhavi).
Abstract
Radish (Raphanus sativus L.) is a popular root vegetable and it is a rich source
of Vitamin- C. The investigation on “Characterization of different genotypes of radish
(Raphanus sativus L.) in northern dry zone of Karnataka” 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 thirty genotypes collected from various sources
were evaluated during kharif and rabi seasons 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 in kharif, rabi and also in pooled average of both the seasons.
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, root
diameter, root length, root to leaf ratio, root weight, root yield plot-1
, root yield ha-1
,
ascorbic acid, calcium content, fibre content, isothiocynates, potassium, protein,
sodium, total phenols and total sugars in both the seasons. 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 root yield per hectare
had maximum significant positive correlation with leaf area, root to leaf ratio and rot
weight. Root weight had maximum direct and indirect effect on root yield hectare-1
.
Hence direct selection for these traits would be more useful in the improvement of
yield hectare-1
.
Based on Mahalonobi’s D
2
analysis, 30 genotypes were grouped into
5 clusters in kharif, 8 clusters in rabi and 9 clusters in pooled average of seasons.
The intra-cluster distance was found maximum in cluster-I in kharif, cluster-IV in
rabi and cluster-II in pooled average of seasons.
Top five genotypes viz., HRESB-8, HRESB-7, HRESB-10, HRESB-16 and
HRESB-9 were identified on the basis of their per se performance for root yield and
top five viz., VRRAD-202, HUB-2, HUB-1, HRESB-24 and HRESB-6 for quality and
these ten genotypes were further assessed for their stability.