Journal of General Plant Pathology (2008) 74, 230-241

Akiko Yamagashira, Chihiro Iwai, Masakazu Misaka, Kenji Hirata, Yoshikatsu Fujita, Yukio Tosa and Motoaki Kusaba (2008)
Taxonomic characterization of Pyricularia isolates from green foxtail and giant foxtail, wild foxtails in Japan
Journal of General Plant Pathology 74 (3), 230-241
Abstract: Twenty-eight Pyricularia isolates from two wild foxtails-green foxtail (Setaria viridis) and giant foxtail (S. faberii)-in Japan were taxonomically characterized by DNA analyses, mating tests, and pathogenicity assays. Although most of the isolates failed to produce perithecia in mating tests with Magnaporthe oryzae, a diagnostic polymerase chain reaction-restriction fragment length polymorphism phenotype of M. oryzae was detected in the beta-tubulin genomic region in all isolates. The pathogenicity assays revealed that host ranges of the isolates were similar to those of isolates from foxtail millet (S. italica), which were exclusively pathogenic on foxtail millet. In addition to the 28 isolates from wild foxtails, 22 Pyricularia isolates from 11 other grasses were analyzed by RFLP using single-copy sequences as probes. In a dendrogram constructed from the RFLP data, isolates that were previously identified as M. oryzae formed a single cluster. All the wild foxtail isolates formed a subcluster with foxtail millet isolates within the M. oryzae cluster. From these results, we conclude that Pyricularia isolates from the wild foxtails are closely related to isolates from foxtail millet and should be classified into the Setaria pathotype of M. oryzae.
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Link to article at publishers website
Database assignments for author(s): Yukio Tosa

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Pyricularia oryzae