Virulence of Puccinia triticina and Puccinia tritici-duri on durum wheat in southern Spain, from 2020 to 2022

Leaf rust is a major wheat disease in southern Spain, where durum wheat is an important crop. Until the 2019/2020 season, this disease was effectively managed, as the most widely planted cultivars in southern Spain had effective resistance genes. A problem arose in the spring of 2020, when every far...

Full description

Saved in:
Bibliographic Details
Published in:Phytopathologia mediterranea 2023-04, Vol.62 (1), p.29-34
Main Authors: RODRIGUEZ VAZQUEZ, Jaime Nolasco, AMMAR, Karim, SOLIS, Ignacio, MARTINEZ-MORENO, Fernando
Format: Article
Language:English
Subjects:
Basidiomycota
Causes of
Crop diseases
Cultivars
Diseases and pests
Distribution
Durum wheat
Farms
Fungi, Phytopathogenic
Genetic aspects
Germplasm
Growing season
Identification and classification
Infections
Inoculation
Leaf rust
Leaves
Microbiological research
Pasta
Pathogens
Puccinia triticina
Rust diseases
Signs and symptoms
Telia
Triticum durum
Virulence
Virulence (Microbiology)
Wheat
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Leaf rust is a major wheat disease in southern Spain, where durum wheat is an important crop. Until the 2019/2020 season, this disease was effectively managed, as the most widely planted cultivars in southern Spain had effective resistance genes. A problem arose in the spring of 2020, when every farm field and durum wheat trial examined displayed leaf rust symptoms. Leaves had few but large uredinial pustules, different from those of the normal leaf rust caused by Puccinia triticina, and telia developed rapidly after only a few days. The symptoms clearly fitted with P. tritici-duri, another wheat leaf rust species already reported in the western Mediterranean Basin. This species is not new in southern Spain but has never been observed at such high severity on almost every durum wheat cultivar grown in that region. Leaf rust severity was assessed in durum wheat field trials in the 2020, 2021 and 2022 growing seasons in four provinces of southern Spain. During 2020 and 2021, 13 single pustule isolates of leaf rust were also collected from different cultivars of durum wheat. Inoculation of the isolates on a differential host set showed that four different races were present, two being of P. tritici-duri. Only cultivar Calero showed consistent resistance to the races of P. tritici-duri employed in this study.
ISSN:0031-9465
1593-2095
DOI:10.36253/phyto-14227