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ABSTRACT
Twenty-four unique genotypes of Lentinus edodes were evaluated for their biological efficiency (BE), mushroom size and mushroom quality on a nutrient enriched sawdust substrate. Significant differences among lines were found for these parameters. Biological efficiencies ranged from 124% (WC 305) to 6.1% (WC 295). Percentages of mushrooms produced with abnormal morphology ranged from a low of 0% to a high of 88%. Breeding and selection of shiitake lines for improved biological efficiency, size and quality would reduce production costs and may help to increase consumption of fresh shiitake mushrooms.
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