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European Journal of Plant Pathology (2019) 154, 995-1007

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Victória Vieira Bertagnolli, Jéssica Rosset Ferreira, Zhaohui Liu, André Cunha Rosa and Carolina Cardoso Deuner (2019)
Phenotypical and genotypical characterization of Pyrenophora tritici-repentis races in Brazil
European Journal of Plant Pathology 154 (4), 995-1007
Abstract: Tan spot, caused by Pyrenophora tritici-repentis, is one of the major wheat diseases in southern Brazil as well as in the wheat production areas of several other countries. The fungal isolates have been classified into eight races according to the production of three fungal necrotrophic effectors. The knowledge about the pathogen population structure is essential for disease control strategies, but such information is lacking in Brazil. The aim of this study was to determine the P. tritici-repentis race structure of Brazilian isolates using, for the first time, biological and molecular techniques. P. tritici-repentis isolates were characterized for their virulence on a set of wheat genotypes, and for the presence of ToxA and ToxB gene. The results from the PCR amplification with the gene specific primers showed that all Brazilian P. tritici-repentis isolates carried ToxA, but no ToxB is present. Race typing on the set of wheat genotypes indicate 65% of the isolates were race 2 while 35% were race 1. This is the first study on the P. tritici-repentis race structure in Brazil and the information will be useful to the local wheat breeders who aim to improve tan spot resistance in wheat cultivars.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Full text of article
Database assignments for author(s): Zhaohui Liu

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution
molecular biology - genes


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Pyrenophora tritici-repentis Wheat (Triticum) Brazil (south)