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

Mining the durum wheat gene pool in search for resistance to Septoria leaf blotch


Amor Hassine Yahyaoui*
International Maize and Wheat Improvement Center (CIMMYT) km. 45 Carretera México-Veracruz El Batan, Texcoco, Estado de México, CP 56130
CRP Wheat Septoria Phenotyping Platform, Tunisia

Sarrah Ben MBarek
Regional Field Crops Research Center of Beja (CRRGC) BP 350, 9000 Beja, Tunisia
CRP Wheat Septoria Phenotyping Platform, Tunisia

Carolina Saint Pierre
International Maize and Wheat Improvement Center (CIMMYT) km. 45 Carretera México-Veracruz El Batan, Texcoco, Estado de México, CP 56130

Marwa Laribi
University of Carthage, National Agronomic Institute of Tunisia (INAT), 43 Avenue Charles Nicolle, 1082 Tunis, Tunisia.
CRP Wheat Septoria Phenotyping Platform, Tunisia

Meriem Nefzaoui
CRP Wheat Septoria Phenotyping Platform, Tunisia

Chaima Araar
University of Carthage, Faculty of Sciences of Bizerte, Street, Bizerte Nord, Bizerte, Tunisia
CRP Wheat Septoria Phenotyping Platform, Tunisia


Poster Presentation
Host Genetics and Resistance Breeding

Atrium, UCD O'Brien centre for Science
Poster 42

View this abstract online by visting isclb2019.com/see/ABS31729

Septoria tritici blotch (STB) caused by Zymoseptoria tritici has become a major disease for durum wheat worldwide but particularly in the Mediterranean area.  For a long time, control of STB was ensured by a wide range of fungicides and not much was done on host resistance until 1990’s due to the appearance of Septoria resistance to fungicides that is a clear risk to wheat production. Faced with this situation, durum wheat breeding programs launched intensive work in search for resistance. Up to date Septoria resistance genes were characterized on bread wheat but none or very few were characterized on durum wheat.  CIMMYT with partners established a regional septoria phenotyping platform with major focus on screening durum wheat and aiming to provide information to collaborators. CRP Wheat led by CIMMYT supported the establishment, in partnership with the Government of Tunisia, of Septoria phenotyping platform that would lead the search for resistance to Z. tritici in close cooperation of stakeholders within Tunisia and NARS of North Africa as well as advanced research Instructions and Universities in Europe, USA, and Australia. Currently the platform has the potential to screen up to 20000 accessions annually at two distinct hot spot locations, complemented with artificial inoculation. Following first year round (year of testing) susceptible accessions are eliminated and the resistant ones are re-tested for second year information. In 2018-2019 season. Over nine thousand durum accessions from Tunisia (571) Algeria (223), CIMMYT (3394), ICARDA (1047), Bari-Italy (757), INRA France (195), Canada (287) and USDA (1570) are screened under field and growth chamber conditions. Good resistances were identified that would allow collaborators to further assess and eventually characterize resistance novel genes in durum wheat background. Capacity development and germplasm will be a major contribution of the platform at the local, regional and global level.

 

Keywords: Zymoseptoria tritici, durum wheat, resistance, CIMMYT, Phenotyping Platform