INVESTIGADORES
MORENO Maria virginia
artículos
Título:
Pathogenic and genetic diversity of isolates of Pyrenophora tritici-repentis causing tan spot of wheat in Argentina
Autor/es:
MORENO M. V.; STENGLEIN S.A.; BALATTI, P.; PERELLÓ, A. E.
Revista:
EUROPEAN JOURNAL OF PLANT PATHOLOGY
Editorial:
SpringerLink
Referencias:
Año: 2008 vol. 122 p. 239 - 252
ISSN:
0929-1873
Resumen:
Tan spot, caused by Pyrenophora tritici-repentis, is a common disease of wheat (Triticum aestivum L.) responsible of economic losses in some wheat growing areas worldwide. In this study the pathogenic and genetic diversity of fifty one P. tritici-repentis isolates collected from different ecological regions of Argentina were analyzed. Virulence tests were conducted on ten selected wheat cultivars: Buck Halcón, Chris, Gabo, Glenlea, Klein Dragón, Klein Sendero, Max, ND 495, ProInta Guazú and ProInta Imperial. Data revealed significant differences between all main factors evaluated and the interactions for nineteen of the isolates analyzed. Based on the reaction type of each isolate/cultivar combination in particular, forty eigth different pathogenic patterns were detected. The molecular analysis using Inter-Simple Sequence Repeats (ISSR) revealed the existence of thirty six different haplotypes among thirty seven isolates of P. tritici-repentis originally selected for this study. These results indicates that P. tritici-repentis on wheat in Argentina is a heterogeneous fungus, implying that screening wheat germoplasm for resistance for tan spot disease need involved a wide range of isolates of the pathogen.