ISHS Acta Horticulturae 275: International Symposium on the Culture of Subtropical and Tropical Fruits and Crops
VEGETATIVE COMPATIBILITY IN FUSARIUM OXYSPORUM F. SP. CUBENSE: CLASSIFYING PREVIOUSLY NONCHARACTERIZED STRAINS |
| Author: | R.C. Ploetz |
| Abstract:
Nitrate nonutilizing (nit) mutants were used to determine vegetative compatibility among strains of Fusarium oxysporum Schlecht. f. sp. cubense (E.F. Smith) Snyd. & Hans. (incitant of fusarial wilt of banana or Panama disease). Seventy-two strains of Races 1, 2, 4, or of unknown Race which were not characterized in a previous study (Ploetz and Correll, 1988) were classified; strains were recovered in Australia, Brazil, Burundi, Costa Rica, Florida (USA), Guadeloupe, Honduras, Ivory Coast, Jamaica, Malawi, the Philippines, Tanzania, Uganda, and Zaire. Fifty-seven of the strains fell into one of seven previously described vegetative compatibility groups (VCGs). Six additional strains fell into one of two new VCGs (VCG 01211, Australia, two strains; VCG 01212, Tanzania, four strains). For the 63 strains which were classified, a good correlation existed between VCG and Race. The origins and relatedness of these strains are discussed. Nine strains did not fall into any of the eleven previously or two presently described VCGs and their relationship to other strains is uncertain. | |
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