Pathotype Identification and Virulence Variation in in China.

Spot blotch caused by has become an important disease in the wheat-growing regions in China that has resulted from changes in the regional climate, agricultural cultivation patterns, and the susceptible wheat varieties that are widely grown. Little information is available about virulence variability and pathogenic specialization of the . isolates from major wheat-growing regions in China.

Virulence and Molecular Diversity in the Population Causing Barley Spot Blotch in China.

Spot blotch, caused by the fungal pathogen , is a limiting factor for barley () production in northeast China, which causes significant grain yield losses and kernel quality degradation. It is critical to determine the virulence diversity of . populations for barley resistance breeding and the judicious grouping of available resistance varieties according to the predominant pathotypes in disease epidemic regions.