IDENTIFICATION AND CHARACTERIZATION OF ISOLATES OF TYPHULA CAUSING SNOW ROT OF WINTER BARLEY IN THE UNITED-KINGDOM

Isolates of Typhula causing snow rot disease of winter barley in the U.K. were all T. incarnata. Morphological characteristics, pectic zymograms and interspecific pairings clearly differentiated them from American isolates of T. ishikariensis var. ishikariensis and T. ishikariensis var. idahoensis. Intraspecific pairings revealed that U.K. T. incarnata isolates had tetrapolar incompatibility with multiple alleles at each locus. U.K. T. incarnata isolates were compatible with American isolates and a common allele was present in a U.K. and an American isolate.