Phytopathologia Mediterranea (2014) 53, 250-268

Mame P. Sarr, M'baye Ndiaye, Johannes Z. Groenewald and Pedro W. Crous (2014)
Genetic diversity in Macrophomina phaseolina, the causal agent of charcoal rot
Phytopathologia Mediterranea 53 (2), 250-268
Abstract: Macrophomina phaseolina (Botryosphaeriaceae) is an important soil- and seed-borne pathogen. This pathogen has a broad geographic distribution, and a large host range. The aim of the present study was to determine the genetic variation among a global set of 189 isolates of M. phaseolina, isolated from 23 hosts and 30 soil samples in 15 countries. To achieve this goal a multi-gene DNA analysis was conducted for the following five loci, ITS, TEF, ACT, CAL and TUB. Based on these results two well-defined clusters could be delineated, one corresponding to M. phaseolina s. str., for which a suitable epitype is designated. The second clade corresponds to M. pseudophaseolina, a novel species occurring on Abelmoschus esculentus, Arachis hypogaea, Hibiscus sabdarifa and Vigna unguiculata in Senegal. No consistent correlation was found among genotype, host and geographic location, and both species could even occur on the same host at the same location. Although M. pseudophaseolina is presently only known from Senegal, further research is required to determine its virulence compared to M. phaseolina, and its geographic distribution.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Pedro W. Crous, Johannes Z. Groenewald, Mbaye Ndiaye

Research topic(s) for pests/diseases/weeds:
molecular biology - genes

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Macrophomina phaseolina	Cowpea and relatives (Vigna)	Niger
	Macrophomina phaseolina	Cowpea and relatives (Vigna)	Senegal
	Macrophomina phaseolina	Hibiscus (crop)	Senegal