Indian Society of Genetics & Plant Breeding

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IDENTIFICATION OF CHROMOSOMES CARRYING GENES FOR RESISTANCE TO LOOSE SMUT OF BREAD WHEAT (TRITICUM AESTIVUM L.) IN INDIA

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The breadwheat variety Cadet and all its monosomic lines (except mono 3A) were
inoculated with a mixture of loose smut chlamydospores. The inoculated seed was grown
during normal (rabi) and off-season (summer) conditions. Cadet was found to be resistant
to loose smut. Resistance was governed by at least three genetic factors located on
chromosomes 18, 30 and 70. The gene on chromosome 30 was major. Genes on
chromosomes 1 8 and 70 were modifiers whose hemizygous ineffectiveness resulted in
slight weakening of the resistance of the variety (only one late tiller of these susceptible
plants developed the disease). While the gene on 18 was effective during both seasons, the
effect of the one on 70 was not discernible during the normal season.
 

Keywords: Monosomic analysis, loose smut, Triticum aestivum

Info

Year: 1997
Volume: 57
Issue: 2
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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