title: Fire blight resistance of pear genotypes from different European countries.
abstract: Several old cultivars, and breeding clones of European pearPyrus communisL. originating from Belgium, England, Sweden, and Switzerland were evaluated for their resistance/susceptibility to fire blight. Studies were carried out during three consecutive years 2007-2009 in the greenhouse of Warsaw University of Life Sciences, Poland. Strain 691 ofErwinia amylovorawas used for artificial infection of plants. Genotypes included in this study considerably varied in their resistance to fire blight. The most resistant was the old English cultivar 'Hessle'. The other two genotypes, i.e., 'Gränna Rödpäron' originating from Sweden, andPyrus communisFG 1606 from Switzerland were included in a group of low susceptible ones. The most susceptible were Cra Py H 18, Cra Py V 22 and Cra Py W 14 from Belgium.
authors.affiliation: Department of Pomology, Faculty of Horticulture and Landscape Architecture, Warsaw University of Life Sciences, Warsaw, Poland.
authors.forename: Andrzej A
authors.initials: AA
authors.lastname: Przybyla
authors.affiliation: Department of Plant Genetics, Breeding, and Biotechnology, Faculty of Horticulture and Landscape Architecture, Warsaw University of Life Sciences, Warsaw, Poland.
authors.forename: Kamila L
authors.initials: KL
authors.lastname: Bokszczanin
authors.affiliation: Department of Plant Pathology, Faculty of Horticulture and Landscape Architecture, Warsaw University of Life Sciences, Warsaw, Poland.
authors.forename: Malgorzata
authors.initials: M
authors.lastname: Schollenberger
authors.affiliation: Department of Experimental Design and Bioinformatics, Faculty of Agriculture and Biology, Warsaw University of Life Sciences, 159 Nowoursynowska Str, 02-776 Warsaw, Poland.
authors.forename: Dariusz
authors.initials: D
authors.lastname: Gozdowski
authors.affiliation: Department of Experimental Design and Bioinformatics, Faculty of Agriculture and Biology, Warsaw University of Life Sciences, 159 Nowoursynowska Str, 02-776 Warsaw, Poland.
authors.forename: Wieslaw
authors.initials: W
authors.lastname: Madry
authors.affiliation: Department of Pomology, Faculty of Horticulture and Landscape Architecture, Warsaw University of Life Sciences, Warsaw, Poland.
authors.forename: Slawomir
authors.initials: S
authors.lastname: Odziemkowski
keywords: Cluster analysis; Dynamics of infection; Erwinia amylovora; Mixed model ANOVA; Pyrus communis L.; Resistance assessments