Results of extensive lab tests of samples of stem rust have shown that the 2016 stem rust epidemics in Sicily were caused by a new, highly virulent variant of race TTTTF. The samples were collected during serious and unusual outbreaks of wheat stem rust on both durum wheat and bread wheat in Sicily during April - June 2016...Read more at Rusttracker
Digalu race (TKTTF)
The Digalu race (race TKTTF) is not part of the Ug99 race group; it is genetically unrelated. This race has been known from Turkey since at least 2005 and it is widely distributed in the Middle East region. It is being increasingly detected across a wide geographical range. Currently it has been confirmed in 9 countries (Turkey, Iran, Lebanon, Egypt, Ethiopia, Georgia, Azerbaijan, Eritrea, Yemen – see Map 1) with 2 additional countries (Germany and Denmark) detecting TKTTF-like variants in 2013. The German and Danish isolates differed by having virulence on 4 additional Sr genes: Sr33, Sr7a, SrTt-3, Sr45 (Olivera et al., 2015).
Ug99 (TTKSK) and the virulence/avirulence profiles of its varients
+ = virulent - = avirulent
|Source: Pablo Olivera|