Physiologic specialization of puccinia recondita f. sp. tritici in canada in 1990

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Abstract

In 1990 leaf rust of wheat (Triticum aestivum) caused by Puccinia recondita f. sp. tritici was first observed on June 21 in southern Manitoba. Infection severity ranged from 20 to 100% in susceptible trap plots; however, commercial cultivars had sufficient resistance and yield losses were minimal in these wheats. A total of 37 virulence phenotypes of the fungus in Canada were detected using 15 isogenic Thatcher lines as differentials. The most common phenotypes were PBL-B in Ontario and Quebec; MDB-14a, MFB-14a, and TBG-14a in the prairies, and NBB-B,18 in British Columbia. No major changes in the identity and prevalence of P. recondita virulence phenotypes in Canada occurred between 1989 and 1990.

Original languageEnglish (US)
Pages (from-to)371-373
Number of pages3
JournalCanadian Journal of Plant Pathology
Volume13
Issue number4
DOIs
StatePublished - Dec 1991

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