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We investigated the utility of mating type, soluble protein profiles obtained after isoelectric focusing, and acid phosphatase (ACP) patterns as genetic markers for the blackleg fungus, Leptosphaeria maculans. Fertile matings were obtained in vitro by pairing single-ascospore isolates. A method for dissecting asci and recovering the eight component ascospores was developed that allowed tetrad analysis. Protein electrophoresis revealed limited polymorphism among the 73 single-ascospore field isolates. Only one isolate (H5) displayed a different soluble protein profile (SPP), termed SPP − , characterized by one missing band and one additional band. We found three ACP patterns in our collection. Protein profiles and ACP patterns were mitotically and meiotically stable
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Claude Gall (1994) studied this question.
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