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Genetic Diversity of Gaeumannomyces graminis var. tritici Populations Using RAPD and ERIC Markers | OMICS International | Abstract
ISSN: 2157-7471

Journal of Plant Pathology & Microbiology
Open Access

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Research Article

Genetic Diversity of Gaeumannomyces graminis var. tritici Populations Using RAPD and ERIC Markers

Sadeghi L1, Alizadeh A1, Safaie N1* and Jamali SH2

1Plant Pathology Department, Tarbiat Modares University, Tehran, Iran

2Plant Variety Registration Department, Seed and Plant Certification and Registration Institute, Karaj, Iran

*Corresponding Author:
Safaie N
Plant Pathology Department
Tarbiat Modares University
Tehran, Iran
E-mail: [email protected]

Received date: October 17, 2012; Accepted date: November 16, 2012; Published date: November 20, 2012

Citation: Sadeghi L, Alizadeh A, Safaie N, Jamali SH (2012) Genetic Diversity of Gaeumannomyces graminis var. tritici Populations Using RAPD and ERIC Markers. J Plant Pathol Microb 3:143. doi:10.4172/2157-7471.1000143

Copyright: © 2012 Sadeghi L, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

Take-all disease which is caused by Gaeumannomyces graminis var. tritici (Ggt) is the most damaging root disease of wheat. Twenty four isolates of pathogen were recovered from diseased samples collected from different provinces of Iran including Fars, Markazi, and Mazandaran. All isolates were specifically identified as Ggt and simultaneously divided into two subpopulations of A and B types. Five primers of RAPD and ERIC primer pair were used to determine the DNA polymorphisms. Cluster analysis was noticed that with the exception of OPC-08 primer, the all remaining RAPD primers and ERIC separated T-28 (having both simple and lobed hyphopodia) from other Ggt isolates with simple hyphopodia. Additionally, these primers identified and separated the two varieties of the pathogen, Gaeumannomyces graminis var. graminis (Ggg) and Ggt. Polymorphism Information Content (PIC) value was estimated between 0.23-0.3. The tested isolates were divided into three groups including a single member group housed T-28 isolate at 39.5% similarity. All Ggt isolates with simple hyphopodia can be divided into two groups, the first group from Markazi province with a 12.5% frequency consisting of three isolates including two B-types (T-1, T-9) that also separated by Principle Component Analysis (PCA). The second group (A-type) contained 83.3% of the remaining isolates. The Iranian population of Ggt shows a high level of genetic diversity dominated by A-type. The dominant population of Ggt isolates provides the pathogen with the ability to fight or overcome any commonly used control measures such as chemicals or resistant cultivars.

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