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Genetic diversity of Pyrenophora tritici-repentis in Algeria as revealed by amplified fragement length polymorphism (AFLP) analysis

Author: Benslimane, H.
Author: Lababidi, S.
Author: Yahyaoui, A.
Author: Ogbonnaya, F.
Author: Bouznad, Z.
Author: Baum, M.
Year: 2013
ISSN: 1684-5315
Abstract: Tan spot caused by Pyrenophora tritici-repentis is a major wheat disease. DNA of 61 isolates of P.$$tritici-repentis from different cereal growing areas in Algeria were analyzed using amplified fragment$$length polymorphism (AFLP) in order to study the genetic diversity among this population. Initially, 78$$primer combinations were tested, of which 12 were selected and applied to the 61 isolates. There was a$$high genetic diversity in this population of P. tritici-repentis with 61 different haplotypes among the 61$$isolates selected. The Jaccard similarity index range was 1.43 to 68.37%. Cluster analysis showed that,$$clustering of isolates was independent of their race classification, geographic origin, or host plant.$$However, one isolate (Ptr24) that showed a new virulence pattern in our previous race analysis study$$was clearly distinguished from the rest of the population studied. This isolate had not only new$$virulence but also different genetic makeup to other P. tritici-repentis isolates and requires additional$$studies to decipher complete knowledge of host-pathogen interactions for tan spot of wheat.
Format: PDF
Language: English
Publisher: Academic Journals
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Type: Article
Pages: 4082-4093
Issue: 26
Volume: 12
DOI: 10.5897/AJB2012.2969
Keywords: AFLP
Publisher URI:
Journal: African Journal of Biotechnology

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  • Wheat
    Wheat - breeding, phytopathology, physiology, quality, biotech

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