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Population structure of South African and Australian Pyrenophora teres isolates.

Lehmensiek, A. and Bester-van der Merwe, A.E. and Sutherland, M.W. and Platz, G. and Kriel, W.M. and Potgieter, G.F. and Prins, R. (2010) Population structure of South African and Australian Pyrenophora teres isolates. Plant Pathology, 59 (3). pp. 504-515.

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Article Link(s): http://dx.doi.org/10.1111/j.1365-3059.2009.02231.x

Publisher URL: http://www3.interscience.wiley.com

Abstract

There are two recognized forms of the disease net blotch of barley: the net form caused by Pyrenophora teres f. teres (PTT) and the spot form caused by P. teres f. maculata (PTM). In this study, amplified fragment length polymorphism analysis was used to investigate the genetic diversity and population structure of 60 PTT and 64 PTM isolates collected across Australia (66 isolates) and in the south-western Cape of South Africa (58 isolates). For comparison, P. tritici-repentis, Exserohilum rostratum and Bipolaris sorokiniana samples were also included in the analyses. Both distance-and model-based cluster analyses separated the PTT and PTM isolates into two strongly divergent genetic groups. Significant variation was observed both among the South African and Australian populations of PTT and PTM and among sampling locations for the PTT samples. Results suggest that sexual reproduction between the two forms is unlikely and that reproduction within the PTT and PTM groups occurs mainly asexually.

Item Type:Article
Corporate Creators:Department of Employment, Economic Development and Innovation (DEEDI), Agri-Science, Crop and Food Science
Business groups:Agri-Science, Crop and Food Science
Additional Information:© The Authors. © John Wiley & Sons, Inc. © British Society for Plant Pathology.
Keywords:Barley; form-specific markers; genetic variation; Hordeum vulgare; Pyrenophora teres f. maculata; Pyrenophora teres f. teres; multilocus genotype data; net blotch; genetic-structure; causal agent; f maculata; rapid analysis; spot form; barley; markers; AFLP.
Subjects:Science > Botany > Cryptogams
Science > Biology > Genetics
Plant pests and diseases
Deposited On:08 Sep 2010 03:13
Last Modified:25 Oct 2011 05:05

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