Plant Protect. Sci., 2010, 46(3):98-106 | DOI: 10.17221/17/2009-PPS

Diversity of oat crown rust (Puccinia coronata f.sp. avenae) isolates detected by virulence and AFLP analyses

Hana Klenová-Jiráková1, Leona Leišová-Svobodová2, Alena Hanzalová2, Ladislav Kučera2
1 Ministry of Environment of the Czech Republic, Prague, Czech Republic
2 Division of Plant Genetics, Breeding and Product Quality, Crop Research Institute, Prague-Ruzyně, Czech Republic

Forty Puccinia coronata f.sp. avenae isolates from several European countries and Israel were tested for virulence to 18 differential oat lines. Amplified Fragment Length Polymorphism (AFLP) analysis was used to evaluate diversity among the studied isolates. Twenty-nine different pathotypes were identified. The prevailing occurrence of pathotypes with a limited number of virulence genes may indicate that oat cultivars grown in Europe possess the limited number of resistance genes. A total of 501 AFLP polymorphic fragments were scored in the studied isolates using twelve primer combinations. All isolates had the unique AFLP molecular pattern. The genetic similarity of isolates from Serbia. Austria and from the Czech Republic indicates that oat crown rust urediniospores may often migrate to particular areas. The number of virulence genes in isolates also seems to play an important role in the clustering. Most isolates possessing a lower number of virulence genes (0-4) were grouped into two clusters, whereas another cluster was composed of a majority of isolates with 4-7 virulence genes. A significant correlation relationship of 0.187 (P = 0.007) was found between AFLP and virulence/avirulence genes based on distance matrices.

Keywords: Puccinia coronata f.sp. avenae; oat crown rust; oat; virulence; AFLP; diversity

Published: September 30, 2010  Show citation

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Klenová-Jiráková H, Leišová-Svobodová L, Hanzalová A, Kučera L. Diversity of oat crown rust (Puccinia coronata f.sp. avenae) isolates detected by virulence and AFLP analyses. Plant Protect. Sci. 2010;46(3):98-106. doi: 10.17221/17/2009-PPS.
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