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Urediniospore isolates of Puccinia triticina were obtained from wheat leaf collections made in three wheat-growing regions in Nebraska in 1997 and in four regions in 1998. Using 16 Thatcher lines that are near-isogenic for leaf rust resistance, 17 virulence phenotypes were found among 121 single uredinial isolates in 1997, and 42 virulence phenotypes were found among 178 isolates in 1998. The most prevalent phenotype in 1997 was MDRR (virulent on Lrl, 3, 3ka, 10, 11, 18, 23, 24, and 30). In 1998, virulence phenotypes MDRR and MDRM (virulent on Lr1, 3, 3ka, 10, Il, 23, 24, and 30) were the most prevalent. In both years, virulence frequency was above 80% to genes Lr1, 3, 3ka, 10, 11, 23, 24, and 30 and below 21% to Lr2a, 17, and 26. Virulence frequency to Lr2c was 37% in 1997 and 22% in 1998. No virulence was found to Lr9, 16, or 21 in either year. New virulence phenotypes were detected in 1998 that were not found in 1997. In 1998, virulence was less frequent on Lr2a, 2c, 3ka, 18, 24, and 26 and more frequent on Lr17 than in 1997.

Titel:	Virulence of Puccinia triticina on wheat in Nebraska during 1997 and 1998
Autor/in / Beteiligte Person:	WATKINS, J. E ; SCHIMELFENIG, J ; BAENZIGER, P. S ; ESKRIDGE, K. M
Link:	Full Text Finder (Volltext) View record from PASCAL Archive
Zeitschrift:	Plant disease, Jg. 85 (2001), Heft 2, S. 159-164
Veröffentlichung:	St. Paul, MN: American Phytopathological Society, 2001
Medientyp:	academicJournal
Umfang:	print, 21 ref
ISSN:	0191-2917 (print)
Schlagwort:	Amérique du Nord North America America del norte Amérique America Etats Unis United States Estados Unidos Nebraska Agronomy, agriculture, phytopathology Agronomie, agriculture, phytopathologie Entomology Entomologie Microbiology, infectious diseases Microbiologie, maladies infectieuses Sciences biologiques et medicales Biological and medical sciences Sciences biologiques fondamentales et appliquees. Psychologie Fundamental and applied biological sciences. Psychology Agronomie. Sciences du sol et productions vegetales Agronomy. Soil science and plant productions Génétique et amélioration des plantes d'intérêt économique Genetics and breeding of economic plants Sélection variétale. Amélioration spéciale, objectifs d'amélioration Varietal selection. Specialized plant breeding, plant breeding aims Résistance aux organismes nuisibles Pest resistance Agents phytopathogènes Plant pathogens Phytopathologie. Zoologie agricole. Protection des cultures et des forets Phytopathology. Animal pests. Plant and forest protection Champignons phytopathogènes Fungal plant pathogens Variations, races, biotypes, spécialisation parasitaire, génétique Variation, races, biotypes, parasitic specialization, genetics Angiospermae Basidiomycetes Fungi Gramineae Monocotyledones Phytopathogène Plant pathogen Fitopatógeno Plante céréalière Cereal crop Planta cerealista Spermatophyta Thallophyta Essai en champ Field experiment Ensayo en campo Lignée isogénique Isogenic line Línea isogénica Lignée plante Line (plant) Línea (planta) Pouvoir pathogène Pathogenicity Poder patógeno Puccinia recondita f. tritici Résistance champignon Fungus resistance Resistencia a los hongos Spécificité hôte Host specificity Especificidad huesped Triticum aestivum Subject Geographic: Amérique du Nord North America America del norte Amérique America Etats Unis United States Estados Unidos Nebraska
Sonstiges:	Nachgewiesen in: PASCAL Archive Sprachen: English Original Material: INIST-CNRS Document Type: Article File Description: text Language: English Author Affiliations: Department of Plant Pathology, University of Nebraska, Lincoln 68583-0722, United States ; Department of Agronomy, University of Nebraska, Lincoln 68583-0722, United States ; Department of Biometry, University of Nebraska, Lincoln 68583-0722, United States Rights: Copyright 2001 INIST-CNRS ; CC BY 4.0 ; Sauf mention contraire ci-dessus, le contenu de cette notice bibliographique peut être utilisé dans le cadre d’une licence CC BY 4.0 Inist-CNRS / Unless otherwise stated above, the content of this bibliographic record may be used under a CC BY 4.0 licence by Inist-CNRS / A menos que se haya señalado antes, el contenido de este registro bibliográfico puede ser utilizado al amparo de una licencia CC BY 4.0 Inist-CNRS Notes: Agronomy. Soil sciences and vegetal productions ; Phytopathology. Agricultural zoology. Crops and forests protection

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Virulence of Puccinia triticina on wheat in Nebraska during 1997 and 1998