Genotypic diversity in barley powdery mildew populations in northern France

• Published in: Plant pathology Vol. 48; no. 5; pp. 582 - 587
• Main Authors: Caffier, V, Brandle, U.E, Wolfe, M.S
• Format: Journal Article
• Language: English
• Published: Oxford, U.K. and Cambridge, USA Blackwell Science Ltd 01.10.1999; Blackwell; Wiley Subscription Services, Inc; Wiley
• Subjects: barley; Biological and medical sciences; Blumeria graminis; cultivars; Erysiphe graminis f. sp. hordei; Fundamental and applied biological sciences. Psychology; Fungal plant pathogens; genetic markers; genetic variation; Hordeum vulgare; Life Sciences; molecular markers; pathotypes; Phytopathology. Animal pests. Plant and forest protection; population; population genetics; random amplified polymorphic DNA technique; RAPD; SCAR; sequence characterized amplified regions; Variation, races, biotypes, parasitic specialization, genetics; virulence; France; Europe; Western Europe; Monocotyledones; Plant pathogen; Hordeum vulgare; Genetic marker; Virulence; Genetic diversity; Population genetics; Random amplified polymorphic DNA marker; Cereal crop; Fungi; Pathogenicity; Gramineae; Pathotype; Angiospermae; Ascomycetes; Spermatophyta; Erysiphe graminis f. hordei; Intraspecific comparison; Thallophyta; RAPD
• ISSN: 0032-0862; 1365-3059
• DOI: 10.1046/j.1365-3059.1999.00381.x

Diversity in populations of Erysiphe graminis (Blumeria graminis) f.sp. hordei was studied with virulence and molecular markers. Isolates were sampled in two locations in northern France from a winter barley cultivar (Plaisant) and a spring cultivar (Caruso). Only a few pathotypes (determined by virulence markers) were common. The rest of the population was diverse. Diversity within common pathotypes, estimated by five RAPD and two SCAR markers, was generally high, except for one pathotype, which was frequent on Plaisant. This pathotype carried only one virulence, Va22, out of the 11 virulences tested. It appeared as a clonal lineage, which had occurred previously, at least in 1992, in northern France, demonstrating survival of asexual lineages in populations that often reproduce sexually.