NDLI: Gibberella xylarioides Sensu Lato from Coffea canephora: a New Mating Population in the Gibberella fujikuroi Species Complex

Content Provider	PubMed Central
Author	Lepoint, Pascale C. E. Munaut, Françoise T. J. Maraite, Henri M. M.
Copyright Year	2005
Abstract	Gibberella xylarioides Heim & Saccas (presumed anamorph, Fusarium xylarioides Steyaert) is the causal agent of coffee wilt disease, an economically important tracheomycosis in Africa. In vitro crosses carried out with Congolese, Ugandan, and Tanzanian single-ascospore/conidial isolates originating from diseased Coffea canephora/excelsa demonstrated a heterothallic mating system, controlled by a single locus with two alleles, MAT-1 and MAT-2. Compatible isolates produced fertile perithecia within 2 to 8 weeks after mating. Mating type (MAT) was characterized by PCR with primer pairs previously developed for the Gibberella fujikuroi species complex (GFC) and for Fusarium oxysporum. All strains analyzed were morphologically identical and corresponded to Booth's description of the “female” F. xylarioides strain. Based on crossing results and MAT-2/translation elongation 1-α (tef) sequence data, G. xylarioides, as currently understood, is demonstrated to encompass at least three “groups”: G. xylarioides sensu strictu Ia, defined hitherto by two “historical” West African strains originating from the severe 1930s to 1950s epidemic (CBS 25852 and CBS 74979); G. xylarioides sensu strictu Ib, defined by two “historical” Central African lowland strains (DSMZ 62457 and ATCC 15664); and G. xylarioides sensu lato II, containing Congolese, Ugandan, and Tanzanian C. canephora/excelsa isolates. Infertility of crosses between the coffee wilt pathogen and known GFC mating populations demonstrates that G. xylarioides sensu lato constitutes a new biological species within the G. fujikuroi complex. MUCL 44532/MUCL 43887 and MUCL 35223/MUCL 44549 are proposed as G. xylarioides sensu lato II MAT-1/MAT-2 reference mating type tester strains.
Related Links	http://dx.doi.org/10.1128/aem.71.12.8466-8471.2005
Ending Page	8471
Page Count	6
Starting Page	8466
File Format	PDF
ISSN	00992240
e-ISSN	10985336
Journal	Applied and Environmental Microbiology
Issue Number	12
Volume Number	71
Language	English
Publisher	American Society for Microbiology
Publisher Date	2005-12-01
Access Restriction	Open
Rights Holder	American Society for Microbiology
Subject Keyword	Biotechnology Food Science Ecology Applied Microbiology and Biotechnology Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Ecology Food Science Applied Microbiology and Biotechnology Biotechnology

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