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GrainGenes Reference Report: PHY-81-1229

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Reference	PHY-81-1229
Title	Detection of the T gene for resistance to Puccinia graminis f. sp. tritici in barley seedlings.
Journal	Phytopathology
Volume	81
Pages	1229
Author	Steffenson BJ Miller JD
Type	abstract
Abstract	In barley, the T gene (Rpg1) confers resistance to many races of the wheat stem rust pathogen (Puccinia graminis f. sp. tritici [Pgt]); however, the identification of this gene in the seedling stage has been difficult because most genotypes exhibit a mixture of a high and low infection types (ITs). Seedlings of cultivars Chevron and Glenn (with T gene); Steptoe and Klages (without T gene); and Heitpas-5, Black Hulless, and PI 382313 (differenct resistance genes) were inoculated with races Pgt-MCC and -HPH. ITs were assessed on plants after 12 days incubation in a growth chamber at 25-28C. With both races, Chevron and Glenn exhibited low ITs (0;1) and Steptoe and Klages intermediate to high ITs (3-2 to 33+). Heitpas-5, Black Hulless, and PI 382313 could be differentiated from genotypes with the T gene since they gave ITs of 23- to 33+ to race HPH. These data demonstrate the usefulness of races MCC and HPH in differentiating genotypes with and without the T gene.
External Databases	https://www.apsnet.org/publications/phytopathology/backissues/Documents/1991Articles/phyto81n10_1133.pdf
Locus	dRpg1

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