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This article in AJ

  1. Vol. 48 No. 11, p. 526-527
     
    Received: Aug 25, 1956
    Published: Nov, 1956


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doi:10.2134/agronj1956.00021962004800110013x

Sources of Wheat Stem Rust Resistance1

  1. I. A. Watson and
  2. Donald M. Stewart2

Synopsis

Synopsis

Seedlings of Khapstein, a variety of T. vulgare resulting from the cross Steinwedel × Khapli emmer, were resistant to most isolates of the prevalent races of stem rust in North America used in this study. Within certain races or race groups, subraces indistinguishable on Khapli could be separated on the basis of their reaction on Khapstein.

Kenya 117A (C.I. 12568) and Kenya 117A (W 1347) were dissimilar in their reactions to many of these isolates of stem rust. Kenya 117A (C.I. 12568) differentiated biotypes or subraces of races 11-32 group, 15B, 17-29 group, and 38. Kenya 117A (W 1347) was not susceptible to any of the isolates used in these tests but its stem rust resistance was not equal to that of Kenya Farmer.

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