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

08:00 EDT 12th July 2019 | BioPortfolio

Summary of "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. With little information on the barley pathogen in China, this study selected 12 typical barley genotypes to differentiate the pathotypes of . isolates collected in China. Seventy-one isolates were grouped into 19 Chinese pathotypes based on infection responses. Seventeen isolates were classified as pathotype 3, which has only been identified in China, whereas most (52 of 71) were classified as pathotype 1. All of the tested isolates had low virulence on the North Dakota (ND) durable, resistant line ND B112. Using 22 selected amplified fragment-length polymorphism (AFLP) primer combinations, genetic polymorphism was used to analyze 68 isolates, which clustered into three distinct groups using the unweighted pair group method average with the genetic distance coefficient. No relationship was found between the virulence of isolates and their origins. Isolates of the same pathotype or those collected from the same location did not group into clusters based on the AFLP analysis.

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This article was published in the following journal.

Name: Plant disease
ISSN: 0191-2917
Pages: PDIS11182103RE

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