Indian Society of Genetics & Plant Breeding

Environmental effects on genetic parameters for oil and seed meal quality components of Indian mustard (Brassica juncea L.)

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The effects of environmental factors on genetic parameters
for oil, protein content, fatty acid profile and glucosinolate
content in a set of Indian mustard (Brassica juncea L.)
varieties and their interrelationships were studied. The
growing environments greatly influenced the estimates of
phenotypic and genotypic coefficient of variation,
heritability and genetic advance. The highest and the
lowest PCV were observed for eicosenoic acid (15.7-34.6%)
and oil content (2.1-4.1%) in different growing seasons.
The genetic variability, in general, over the 3 growing
seasons was the highest for eicosenoic acid followed by
saturated fatty acid and linolenic acid. Erucic acid, by and
large, consistently expressed high heritability estimates
(> 70.0%) while eicosenoic acid showed moderate
heritability irrespective of the growing seasons. The
saturated fatty acids (SFA), linoleic, linolenic and
eicosenoic acid consistently showed moderate to high
genetic advance over the growing seasons. Low to
moderate heritability associated with moderate to high
genetic advance for linoleic, linolenic and eicosenoic acid
suggested the pre-dominance of non-additive gene effects
in the expression of these characters. None of the
characters investigated showed a consistent pattern of
association over the 3 cropping seasons. Erucic acid
showed negative and significant relationship with oleic
and linoleic acid.

Keywords: Environmental effects, genetic parameters, oil, protein, glucosinolate content, fatty acid profiles, Indian mustard

Info

Year: 2012
Volume: 72
Issue: 4
Article DOI: N/A
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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