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Race specific expression of oat crown rust resistance conditioned by major and minor genes



Race specific expression of oat crown rust resistance conditioned by major and minor genes



Euphytica 32(3): 857-862



In the oat [Avena sativa] lines Pc 50-2 and Pc 50-4, identically resistant (infection type 0) to many crown rust isolates [Puccinia coronata f. sp. avena], an unusual difference in reaction to the Polish crown rust isolate 7-77P was found. Whereas Pc 50-4 was highly susceptible and severely affected, Pc 50-2 showed a reproducibly very low occurrence of resistant infection types (0; 1, 2). Genetic analyses of these lines to a rust isolate, avirulent to both lines, indicated that each of them contains a different major resistance gene. The crown rust resistance in Pc 50-2 was indicated to be influenced by a group of minor genes controlling the infection severity and the frequency of infection types when attacked with rust isolate 7-77P.

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Accession: 006248192

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