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. ISSN 0032-0862

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There are two recognised forms of the disease net blotch of barley. The net form of net blotch is caused by P. teres f. teres (PTT) while the spot form is 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, Pyrenophora 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 South Africa and Australia harbour different biotypes for each form of P. teres. The isolates collected for this study will form the basis of an on-going collection available for future studies.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Author version deposited in accordance with the copyright policy of the publisher. Copyright 2010 The Authors. Journal compilation Copyright 2010 BSPP.
Faculty / Department / School: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 07 Sep 2010 12:18
Last Modified: 26 Sep 2013 00:09
Uncontrolled Keywords: AMOVA; NTSYS; Hordeum vulgare; form specific markers; barley; genetic variation
Fields of Research : 06 Biological Sciences > 0607 Plant Biology > 060704 Plant Pathology
06 Biological Sciences > 0605 Microbiology > 060505 Mycology
06 Biological Sciences > 0604 Genetics > 060411 Population, Ecological and Evolutionary Genetics
Socio-Economic Objective: B Economic Development > 82 Plant Production and Plant Primary Products > 8205 Winter Grains and Oilseeds > 820501 Barley
Identification Number or DOI: 10.1111/j.1365-3059.2009.02231.x
URI: http://eprints.usq.edu.au/id/eprint/8324

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