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DNA based characterization of Ceratocystis fimbriata isolates associated with mango decline in Oman
M.
van Wyk A D,
A. O.
Al-Adawi B,
B. D.
Wingfield A,
A. M.
Al-Subhi C,
M. L.
Deadman C,
M. J.
Wingfield A
A
Department of Genetics, Forestry and Agricultural Biotechnology Institute, University of Pretoria, Pretoria 0002, South Africa.
B
Ghadafan Agriculture Research Station, Ministry of Agriculture and Fisheries, PO Box 204, Sohar 311, Sultanate of Oman.
C
Department of Crop Sciences, Collage of Agricultural and Marine Sciences, Sultan Qaboos University, PO Box 34, Al-Khod 123, Sultanate of Oman.
D
Corresponding author. Email: marelize.vanwyk@fabi.up.ac.za
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Australasian Plant Pathology 34(4) 587–590 http://dx.doi.org/10.1071/AP05080
Submitted: 9 March 2005
Accepted: 26 July 2005
Published online: 2 December 2005
Abstract
A serious mango decline disease has recently been reported from the Sultanate of Oman. Based on morphological characteristics, the pathogen responsible for the disease was previously identified as Ceratocystis fimbriata. C. fimbriata is one of the most important pathogens of mango in Brazil and its appearance in Oman is of great concern. Recent phylogenetic studies have shown that C. fimbriata most likely represents a species complex. The aim of this study was to confirm the identity of the mango pathogen in Oman based on DNA sequences. Sequence data were obtained for the internal transcribed spacer 1 and 2 regions and the 5.8S rRNA gene regions and these were compared with sequence data of C. fimbriata from several hosts and geographic areas. The isolates from Oman where shown to represent C. fimbriata sensu lato and also to be most closely related to an isolate from mango in Brazil. This provides some evidence that the mango pathogen in Oman might have originated in Brazil.
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Australasian Plant Disease Notes
