Initial material for solving the main problems encountered in breeding winter rye in the northwestern zone of the USSR by V. D. Kobylyanskij

“…Nine commercial varieties with a high yield potential and winterhardiness were bred. Short-strawed donors resistant to powdery mildew and brown rust (Imering 4, Fletera 2, Immunnaja 5), unique in their kind and very valuable, were bred by introgression of the genes for resistance, which had been discovered in the populations of wild species and older varieties. …”
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