Genetic variability, inheritance and
correlation for mineral contents in cabbage (Brassica oleracea var. capitata
L.).
Singh
B K, Sharma S R and Singh B
Journal
of Horticultural Research 21 (1): 91-97, 2013
E-mail:
bksinghkushinagar@yahoo.co.in
Abstract
Brassica vegetables are important sources of
dietary minerals. However, information on the inher-itance and correlation for
content of mineral elements such as iron, zinc, copper, manganese, potassium,
and calcium in cabbage, which is essential if the quality of this vegetable is
to be improved through breeding, is not available. Therefore, the experiment
was set up with seventy-one cabbage genotypes including cultivars, germplasm,
and F1 hybrids, grown in field. Mineral composition of the genotypes tested
differed highly significantly indicating the presence of adequate amount of
variability. A high heritability (>80%) accompanied by high genetic advance
as percentage of mean (>40%) for uptake and accumulation of Fe, Zn, Cu, Mn
and Ca indicates the predominance of additive gene, which could be improved by
hybridization followed by selection breeding approach. Nevertheless, heterosis
breeding would be an imperative in increasing the K content in cabbage heads as
indicated by non-additive gene action for K accumulation having high
heritability (>80%) and low genetic advance as percentage of mean (<30%).
Moreover, both additive and non-additive genes were responsible for individual
head weight. A positive correlation for Fe, Zn and Mn contents with other
minerals will help in simultaneous selection of mineral elements. Nevertheless,
major yield contributing ‘head weight’ was negatively correlated with minerals
content and emphasized the selection of smaller head size to maintain the
higher mineral content in tissues of cabbage heads. Hence, assessing the
heritability, inheritance and correlation for minerals would be useful in the
developing mineral-rich and productive genotypes.
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