Jan19, 2015: Preliminary report for Puccinia striiformis race analysis 2013 published by Global Rust Reference Center (GRRC), Aarhus University, Denmark.

GRRC-Logonew3 smallThe Global Rust Reference Center in Denmark has just published the latest report detailing the results of race analysis for Puccinia striiformis samples submitted during the period January – December 2013. A total of 79 isolates were recovered from 11 countries. The report details race analysis results from a total of 101 isolates from 12 countries obtained during 2012 and 2013.
Key highlights from the report are:
• As in previous years, no detection of virulence to Yr5 and Yr15
• Virulence for Yr10 was observed in East Africa. But it was also noted that virulence for Yr10 was common among European samples from Triticale and virulence for Yr17 was common for European wheat samples.
• Isolates recovered from Afghanistan appeared relatively diverse and additional fine-scale diversity based on modified infection types were quite often observed.
• Isolates considered to belong to the aggressive strain previously reported in many parts of the world were still common. The aggressive strain was also detected frequently in Kenya and in epidemic areas in Ethiopia with additional virulence for Yr1, Yr10, and Yr27. Thus, the combination of virulence for Yr27 and aggressiveness has proven to increase the epidemic
risks in many areas
• Molecular PCR based-markers to detect the aggressive strains are currently being developed by GRRC which will greatly facilitate rapid detection of such isolates (Walter et al. 2014, in preparation).
Yr27-virulent races were detected in many areas, e.g., Central and South Asia, East Africa and the Middle East.
A copy of the report – Hovmøller 2013: Global Rust Reference Center: Research funded by: Aarhus University,Denmark; CIMMYT; ICARDA – can be found on Wheatrust.org

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