Abstract
Twenty-three genotypes of maitake (Grifola frondosa) from Asia, North America and Europe were compared for biological efficiency (BE), quality and crop cycle time. Significant differences among lines were found for BE and crop cycle time when mushrooms were produced on nutrient-supplemented (15% millet, 10% wheat bran and 0.2% gypsum) oak sawdust substrate. Four isolates (WC828, M036, M037, and M040) were found to have the most consistent and highest BEs (38.5%, 39.5%, 35.8%, and 38.9%, respectively) and quality ratings (1.2, 1.3, 1.4, and 1.2, respectively, where I is highest quality and 4 is lowest quality). A commercial line (M039) used in China had the shortest crop cycle time (8 weeks). Lines deemed to have the best commercial potential were of Asian origin.
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