Bunt reaction of some varieties of hard red winter wheat
1938
Rodenhiser, H.A. | Quisenberry, K.S.
Bunt nurseries of hard red winter wheat were grown for 1 to 6 years at 10 experiment stations in the Great Plains states and at Kearneysville, W. Va., St. Paul, Minn., and Logan, Utah. Each nursery contained 50 varieties and strains of winter wheat grown in duplicate rows. The inoculum used was a composite of collections of T. levis and T. tritici obtained from fields selected at random throughout the state in which the test or tests were made. No variety or selection proved to be bunt-free at all stations, but a large number may be classed as resistant. Oro, Martin, and Hussar, and Minturki to a limited extent, contributed factors for resistance, in hybrid lines, to the races of the bunt organism used in these tests except those collected in Montana. The four above-mentioned varieties were susceptible when inoculated individually with certain races present in Montana and other wheat-growing areas. Bunt-resistant reactions determined by experiments in which bulk inoculum is used should be considered as preliminary evidence only, and such tests should be supplemented by others in which the known races of Tilletia are used individually. Only 10 of 50 wheats tested proved to be resistant to the so-called "dwarf" smut race of T. tritici prevalent in the vicinity of Logan, Utah, and in the Gallatin Valley of Montana. Factors for resistance to this race are present in Martin, Hussar, Ioturk, and Relief.
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