Indian Society of Genetics & Plant Breeding

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INHERITANCE OF RESISTANCE TO WHITE RUST DISEASE IN INDIAN MUSTARD

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A complete diallel set of crosses was produced from ten diverse parents of varying
degrees of resistance and susceptibility to white rust and assessed to study the
inheritance of the disease caused by Albugo candida. Data from parents and their FIS
including reciprocals were analysed using Griffing and Jinks- Hayman methods of
diallel analysis. The experiments confirmed from the analysis of both the approaches
that additive gene action predominantly controlled the inheritance of white rust disease.
The parent Poorbijaya was the best general combiner followed by BJ-38. The cross
Glossy mutant x BJ-38 was found to be the best specific combination. All the crosses
showing superior sca effects could be utilised for getting transgressive segregates with
better resistance to white rust in mustard. The mean degree of dominance was partial.
Heritability estimates in narrow and broad senses were high. Predominance of additive'
genetic variance coupled with high heritability suggested that simple selection procedures
such as pedigree breeding would be useful for improving the level of resistance
 

Keywords: Brassica juncea, Albugo candida, diallel analysis, combining ability, degree of dominance, transgressive segragate

Info

Year: 2000
Volume: 60
Issue: 3
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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