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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
A polyphasic approach for studying colletotrichum
Fungal Diversity, Volume 39, Year 2009
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Description
Colletotrichum is the causal agent of anthracnose and other diseases on leaves, stems and fruits of numerous plant species, including several important crops. Accurate species identification is critical to understand the epidemiology and to develop effective control of these diseases. Morphologically-based identification of Colletotrichum species has always been problematic, because there are few reliable characters and many of these characters are plastic, dependent upon methods and experimental conditions. Rapid progress in molecular phylogenetic methods is now making it possible to recognise stable and well-resolved clades within Colletotrichum. How these should be reflected in a classification system remains to be resolved. An important step in providing a stable taxonomy for the genus is to epitypify existing names, and in so doing link them to genetically defined clades. We recommend a polyphasic approach to the recognition and identification of species within Colletotrichum, matching genetic distinctness with informative morphological and biological characters. This paper reviews various approaches in the study of Colletotrichum complexes including morphology, pathogenicity, physiology, phylogenetics and secondary metabolite production. A backbone phylogenetic tree using ITS sequence data from 42 ex-type specimens has been generated. Phylogenetic analysis using ITS sequence data is a useful tool to give a preliminarily identification for Colletotrichum species or place them in species complexes. However, caution must be taken here as the majority of the ITS sequences deposited in GenBank are wrongly named. Multi-gene phylogenetic data provides much better understanding of the relationships within Colletotrichum and should be employed where possible. We propose that an ideal approach for Colletotrichum systematics should be based on a multi-gene phylogeny, with comparison made with type specimens, and a well-defined phylogenetic lineage should be in conjunction with recognisable polyphasic characters, such as morphology, physiology, pathogenicity, cultural characteristics and secondary metabolites. Finally a set of protocols and methodologies is provided as a guideline for future studies, epitypification and the description of new species. © 2009 Kluwer Academic Publishers. All Rights reserved.
Authors & Co-Authors
Cai, Lei
China, Haidin
Novozymes China Investment Co. Ltd.
Hyde, Kevin D.
China, Beijing
Chinese Academy of Forestry
Thailand, Chiang Rai
Mae Fah Luang University
Taylor, P. W.J.
Australia, Melbourne
University of Melbourne
Weir, Bevan S.
New Zealand, Auckland
Landcare Research, Auckland
Waller, James M.
United Kingdom, Wallingford
Cabi, United Kingdom
Abang, Mathew M.
Taiwan, Tainan
Avrdc - the World Vegetable Center
Zhang, Jinze
China, Hangzhou
Zhejiang University
Yang, Youlian
China, Guiyang
Guizhou Academy of Agricultural Sciences
Phoulivong, Sitthisack
Thailand, Chiang Rai
Mae Fah Luang University
Liu, Zuoyi
China, Guiyang
Guizhou Academy of Agricultural Sciences
Prihastuti, Haryudian
Thailand, Chiang Rai
Mae Fah Luang University
Shivas, Roger G.
Australia, Brisbane
Queensland Department of Agriculture and Fisheries
McKenzie, Eric Huge Charles
New Zealand, Auckland
Landcare Research, Auckland
Johnston, Peter R.
New Zealand, Auckland
Landcare Research, Auckland
Statistics
Citations: 488
Authors: 14
Affiliations: 10
Identifiers
ISSN:
15602745
Research Areas
Genetics And Genomics
Study Design
Case-Control Study