|
|||||
|
|
Pathogenic and molecular variability among isolates of Pyrenophora tritici-repentis, causal agent of tan spot of wheat in Argentina |
|
| Authors: | M V Moreno S A Stenglein P A Balatti A E Perelló |
| Institution: | 1. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina 2. Laboratorio de Biología Funcional y Biotecnología (BIOLAB) Facultad de Agronomía de Azul, Universidad Nacional del Centro de la Provincia de Buenos Aires (UNICEN), Argentina, República de Italia N° 780, Azul, CP 7300, Buenos Aires, Argentina 3. Centro de Investigaciones de Fitopatología (CIDEFI), Facultad de Ciencias Agrarias y Forestales, Universidad Nacional de La Plata, Buenos Aires, Argentina 4. Comisión de Investigaciones Científicas, de la Provincia de Buenos Aires, Argentina (CICBA), Buenos Aires, Argentina |
| Abstract: | Tan spot, caused by Pyrenophora tritici-repentis, 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. tritici-repentis 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. |
| Keywords: | Tan spot Triticum aestivum Pyrenophora tritici-repentis ISSR pathogenic diversity |
| 本文献已被 SpringerLink 等数据库收录！ | |