International Symposium on Cereal Leaf Blights 2019 | University College Dublin, Ireland | 22-24 May 2019

Contribution of proteinaceous effectors in Parastagonospora nodorum blotch development in wheat and triticale.


Jakub Walczewski*
Plant Breeding and Acclimatization Institute (IHAR) - National Research Institute in Radzikow (Poland)

Piotr Ochodzki
Plant Breeding and Acclimatization Institute (IHAR) - National Research Institute in Radzikow (Poland)

Edward Arseniuk
Plant Breeding and Acclimatization Institute (IHAR) - National Research Institute in Radzikow (Poland)


Poster Presentation
Host Genetics and Resistance Breeding

Atrium, UCD O'Brien centre for Science
Poster 48

View this abstract online by visting isclb2019.com/see/ABS74458

Parastagonospora nodorum is a necrotrophic pathogen of wheat and triticale. It is known to produce several protein effectors which cause necrosis development in susceptible host genotypes. Pathogen can incite necrosis of leaves as well as glumes. Destruction of green plant parts affects photosynthesis adversely, what results in grain yield loss, quantitative and qualitative in nature.

Among Polish P. nodorum population, Tox1, Tox3 and Tox5 are most frequent effectors. ToxA is present only in minority of screened isolates. All of these effectors were purified and used to phenotype wheat and triticale lines. Diversified breading materials of wheat and triticale were utilized in disease evaluation trials in field and controlled environment conditions. Tox3 and Tox5 insensitivity were positively correlated with phenotypic resistance. Elimination of Tox3 sensitive lines as well as lines sensitive to other effectors can subsequently be used to increase P. nodorum resistance in wheat and triticale breeding materials.