Pathogens

TTTTF

From Rusttracker:

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)

from Rusttracker:

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).

More information at Rust Tracker

Ug99 (TTKSK) and the virulence/avirulence profiles of its varients

+ = virulent   - = avirulent

Race Year Sr31 Sr21 Sr24 Sr36 SrTmp Sr30 Sr9h
TTKSK 1998 + + - - - + -
TTKSF 2005 - + - - - + -
TTKST 2006 + + + - - + -
TTTSK 2007 + + - + - + -
TTKSP 2007 - + + - - + -
PTKSK 2007 + - - - - + -
PTKST 2007 + - + - - + -
TTKSF 2010 + + - - - + +
TTHST 2013 + + + - - - -
TTKTK 2014 + + - - + + -
TTKTT 2014 + + + - + + -
TTHSK 2015 + + - - - - -
PTKTK 2015 + - - - + + -
Source: Pablo Olivera