Indian Society of Genetics & Plant Breeding

Genetic diversity for adult plant resistance to leaf rust in bread wheat (Triticum aestivum L.)

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There is an increasing worldwide interest in adult plant
resistance (APR) since most examples of durable resistance
to leaf rust in wheat are this kind. Twelve bread wheat
genotypes were studied for inheritance of APR to leaf rust
using pathotype 77-5 (121R63-1), the most prevalent and
widely virulent one on bread wheat germplasm in India.
Resistance was controlled by a pair of dominant and
recessive genes each in CPAN 1676 and CSP 44 and by two
independent dominant genes each in CPAN 1796, Frontana,
HD 2009, HD 2135, HUW 37, HW 517, Nainari 60, Pavon 76,VL
404 and WG 138. Segregation patterns observed in their
intercrosses showed the presence of at least four genes,
including a recessive one, among these genotypes in
addition to known APR genes Lr34, Lr46, Lr48, Lr49 and
Lr68. The present findings are expected to contribute
toward enriching diversity for leaf rust resistance in bread
wheat improvement programmes.

Keywords: Leaf rust resistance, adult plant resistance, genetic diversity, pathotype, Puccinia triticina


Year: 2015
Volume: 75
Issue: 2
Article DOI: 10.5958/0975-6906.2015.00026.7
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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