Abstract
Dedikaryotization causing flat sectors in the dikaryotic mycelia of Pholiota nameko was investigated at different temperatures. Flat sectors appeared in the colonies of the most stocks at a high temperature (30℃) whereas they did not at lower temperatures. Therefore, the high temperature environment is considered to be one of the causes that promote dedikaryotization in the mycelial colony. The successively subcultured stocks showed increase frequencies of dedikaryotization even at a low temperature (25℃) as compared with the colonies with less subculturing.
