Light microscopic observation of nuclei and mitotic chromosomes of Botrytis species.
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The mean number of nuclei in a conidium of B. allii (seven isolates), B. byssoidea (three isolates), and B. cinerea (five isolates) was 1.3-1.5, 5.0-5.1, and 4.0-5.1; respectively, whereas that of B. squamosa (one isolate) was 18.4. The chromosome number was found to be 16 in B. byssoidea, B. cinerea, B. squamosa, and B. tulipae. Seven isolates of B. allii were divided into two groups according to the chromosome number: three isolates had 32 chromosomes, whereas the other four had 16