Indian Society of Genetics & Plant Breeding

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Diverse sources of resistance to leaf rust in durum wheat

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Inheritance and extent of diversity for leaf rust resistance
were seedling studied among five durum genotypes using
pathotype 12-2 (1R5). The F2 and F3 analyses showed that
resistance was controlled by one dominant gene each in B
276 and Guji S and by two dominant genes each in AKDW
4339, CPAN 6118 and VD 2001-14. Allelic tests revealed that
these genes were different from each other, except the one
common between VD 2001-14 and Guji S. Thus, seven diverse
genes for leaf rust resistance were identified among the
genotypes studied. The identity of these genes is not
known. However, they should be different from Lr23 which
is common in Indian durum germplasm; and from Lr3,
Lr14a, and Lr27+Lr31 among the Lr genes reported in durum
wheat, since the pathotype 12-2 (1R5) is virulent to all these
genes. The above genotypes can enrich diversity for leaf
rust resistance in durum improvement.

Keywords: Leaf rust resistance, genetic diversity, Triticum turgidum ssp. durum, Puccinia triticina, Lr genes

Info

Year: 2015
Volume: 75
Issue: 3
Article DOI: 10.5958/0975-6906.2015.00053.X
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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