Short communication: Emergence of a new race of leaf rust with combined virulence to Lr14a and Lr72 genes on durum wheat
Ver/Abrir
Autor/a
Soleiman, Nour H.
Solis, Ignacio
Soliman, Mahmoud H.
Sillero, Josefa C.
Alvaro, Fanny
Serra, Joan
Ammar, Karim
Martinez-Moreno, Fernando
Fecha de publicación
2016-08-31ISSN
2171-9292
Resumen
Leaf rust is a foliar disease caused by the fungus Puccinia triticina that may severely reduce durum wheat yield. Resistance to this pathogen is common in modern durum germplasm but is frequently based on Lr72 and Lr14a. After accounts of races with virulence to Lr14a gene in France in 2000, the present study reports the detection in 2013 for the first time of a new race with virulence to Lr14a and Lr72. The aim of this work was to characterize the virulence pattern of four Spanish isolates with virulence to Lr14a, and to discuss the consequences of this presence. Rusted leaves from cultivars ‘Don Jaime’ (Lr14a) and ‘Gallareta’ (Lr72) were collected in 2013 in the field at two Spanish sites, one in the south (near Cadiz) and another in the north (near Girona). Spores from single pustule for each cultivar and site were multiplied on susceptible cultivar ‘Don Rafael’. Then, the four isolates were inoculated on a set of 19 isogenic lines Thatcher to characterize their virulence spectrum. All isolates presented the same virulence
pattern. They were virulent on both Lr14a and Lr72 and the race was named DBB/BS. This race was very similar to those reported in 2009-11, but with added virulence to Lr14a. The resistance based on Lr14a has therefore been overcome in Spain, by a new race that has likely emerged via stepwise mutation from the local predominating races. This information is important to guide breeders in their breeding programmes and gene deployment strategies.
Tipo de documento
Artículo
Versión del documento
Versión publicada
Lengua
Inglés
Materias (CDU)
633 - Cultivos y producciones
Páginas
4
Publicado por
Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA)
Publicado en
Spanish Journal of Agricultural Research
Citación
Soleiman, Nour H., Ignacio Solis, Mahmoud H. Soliman, Josefa C. Sillero, Dolors Villegas, Fanny Alvaro, Conxita Royo, Joan Serra, Karim Ammar, and Fernando Martínez-Moreno. 2016. "Short Communication: Emergence Of A New Race Of Leaf Rust With Combined Virulence To Lr14a And Lr72 Genes On Durum Wheat". Spanish Journal Of Agricultural Research 14 (3): e10SC02. doi:10.5424/sjar/2016143-9184.
Program
Cultius Extensius Sostenibles
Este ítem aparece en la(s) siguiente(s) colección(ones)
- ARTICLES CIENTÍFICS [2549]
El ítem tiene asociados los siguientes ficheros de licencia:
Excepto si se señala otra cosa, la licencia del ítem se describe como http://creativecommons.org/licenses/by/4.0/