Indian Society of Genetics & Plant Breeding

Genetic variability for micro- and macro-nutrients in Indian mustard [Brassica juncea (L.)] under two environments

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Twenty two Indian mustard [Brassica juncea (L.)] genotypes
were evaluated in a randomized complete block design
with three replications during rabi 2008-2009 under two
dates of sowing, viz., November 09 (E1) and November 25
(E2) to assess variability effects of environment on micro
(Zn, Cu, Fe, Mn) and macro nutrients (Na, K). The results
revealed that genotypes had substantial genetic variability
for both micro- and macro-nutrients in seeds. However, the
delayed sowing exposed the crop to heat stress especially
during seed development appreciably reduced nutrients
content. Both genotypic and phenotypic variations were
high under delayed sowing (E2) except for Cu and Fe
content. Genotypes CS-3000-1-1-1-5, BPR-538-10 and BPR-
560-6-B exhibited high Mn, Fe and Na content, respectively
under both environments, E1 and E2 and would be potential
sources for utilization in the breeding programme for
enhancing nutritional value of the animal feed. Cu and Fe
contents also showed consistently high heritability and
genetic advance under both environments, implying that
these characters could possibly be controlled by additive
gene effects and could be improved by simple selection in
segregating generations.

Keywords: Genetic variability, micronutrients, Indian mustard, heritability, Brassica juncea

Info

Year: 2013
Volume: 73
Issue: 2
 Article DOI: 10.5958/j.0975-6906.73.2.025
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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