INFIVE   05416
INSTITUTO DE FISIOLOGIA VEGETAL
Unidad Ejecutora - UE
artículos
Título:
Pathogenic and molecular variability among isolatesof Pyrenophora tritici-repentis, causal agent of tan spot of wheat in Argentina
Autor/es:
M. V. MORENO & S. A. STENGLEIN & P. A. BALATTI, A. PERELLÓ
Revista:
EUROPEAN JOURNAL OF PLANT PATHOLOGY
Referencias:
Año: 2008 p. 1 - 14
ISSN:
0929-1873
Resumen:
Tan spot, caused by Pyrenophora triticirepentis,
is a common disease of wheat (Triticum
aestivum) responsible for economic losses in some
wheat growing areas worldwide. In this study the
pathogenic and genetic diversity of 51 P. triticirepentisPyrenophora triticirepentis,
is a common disease of wheat (Triticum
aestivum) responsible for economic losses in some
wheat growing areas worldwide. In this study the
pathogenic and genetic diversity of 51 P. triticirepentisTriticum
aestivum) responsible for economic losses in some
wheat growing areas worldwide. In this study the
pathogenic and genetic diversity of 51 P. triticirepentis) responsible for economic losses in some
wheat growing areas worldwide. In this study the
pathogenic and genetic diversity of 51 P. triticirepentisP. triticirepentis
isolates collected from different ecological
regions of Argentina were analyzed. Virulence tests
were conducted on 10 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 19 of the isolates analyzed. Based on the reaction
type of each isolate/cultivar combination, 48 different
pathogenic patterns were detected. The molecular
analysis using Inter-Simple Sequence Repeats (ISSR)
revealed the existence of 36 different haplotypes
among 37 isolates of P. tritici-repentis originally
selected for this study. These results indicate that P.
tritici-repentis on wheat in Argentina is a heterogeneous
fungus, implying that screening wheat germoplasm
for resistance for tan spot disease requires a
wide range of pathogen isolates.P. tritici-repentis originally
selected for this study. These results indicate that P.
tritici-repentis on wheat in Argentina is a heterogeneous
fungus, implying that screening wheat germoplasm
for resistance for tan spot disease requires a
wide range of pathogen isolates.P.
tritici-repentis on wheat in Argentina is a heterogeneous
fungus, implying that screening wheat germoplasm
for resistance for tan spot disease requires a
wide range of pathogen isolates.on wheat in Argentina is a heterogeneous
fungus, implying that screening wheat germoplasm
for resistance for tan spot disease requires a
wide range of pathogen isolates.
Keywords Tan spot . TriticumTan spot . Triticum