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AFLP analysis for examining genetic differences in cultivated strains and their single-spore isolates and for confirming successful crosses in Agaricus blazei

AFLP analysis for examining genetic differences in cultivated strains and their single-spore isolates and for confirming successful crosses in Agaricus blazei

Mycoscience 48(5): 297-304

ISSN/ISBN: 1340-3540

DOI: 10.1007/s10267-007-0372-6

Amplified fragment length polymorphism (AFLP) analysis was used to examine genetic differences in Agaricus blazei cultivated strains and their single-spore isolates (SSIs). AFLP analysis with five primer combinations identified a total of 267 AFLP bands from nine cultivated strains (one from Brazil and eight from Japan), of which 165 were polymorphic between the nine strains. An AFLP data dendrogram grouped the eight Japanese strains, with the Brazilian strain acting as an outlier, suggesting that the Brazilian and Japanese strains are genetically quite different. Twelve SSIs derived from each of four cultivated strains were subjected to AFLP analysis. All the AFLP bands detected in the cultivated strains were also found in at least one SSI, but some unique bands were detected in SSIs. The total number of AFLP bands from individual SSIs was clearly less than those from their parental strains, and many of polymorphic AFLP bands from the parental strains segregated in SSIs at a ratio of 1 : 1, suggesting that the SSIs are homokaryotic. Distance values based on presence or absence of individual AFLP bands among SSIs from different strains were clearly higher than those among SSIs from a single strain. In addition, AFLP analysis was shown to be useful in confirming hybrid formation in crosses between SSIs.

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Accession: 014930737

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