Plant Breeding (1998) 117, 505-513

K.N. Adhikari and R.A. McIntosh (1998)
Inheritance of wheat stem rust resistance in triticale
Plant Breeding 117 (6), 505-513
Abstract: Genetic studies were conducted on nine triticale cultivars and lines to determine the presence and identity of stem rust resistance genes. The lines were intercrossed and their F₂ and F₃ generations were tested with selected pathotypes of Puccinia graminis tritici. Segregation in seedling tests showed the presence of two new genes SrLa1 and SrLa2 in 'Lasko', SrBj and SrJ in 'Bejon', SrVen in 'Currency', SrBj in 'Abacus' and 'RM4', and SrNin in 'Tahara', 'Maiden' and 'Madonna'. SrBj, SrNin, SrLa1 and SrLa2 were genetically independent and each conferred resistance to the currently important Australian P. graminis tritici pt 34-2,12,13, whereas SrJ and SrVen conferred moderately susceptible reactions to the same pathotype. SrVen segregated independently of SrBj, but the relationship of SrVen with the other genes was not determined. The typical low infection types conferred by SrBj and SrJ were best expressed at temperatures above 21°C. Prolamine separations using sodium dodecyl sulphate-polyacrylamide gel electrophoresis confirmed that SrNin and SrBj were located in chromosome 2R. The gene SrLa1 behaved as a third allele at or near the Sr27/SrSatu locus in chromosome 3R. The present work demonstrated that chromosomes 2R and 3R are important bearers of genes for stem rust resistance in hexaploid triticale.
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Link to article at publishers website
Database assignments for author(s): Kedar N. Adhikari

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Puccinia graminis	Triticale (xTriticosecale rimpaui)