Abstract
Rhy-1, one mutant strain of Neurospora crassa which shows arrhythmicity at high temperature, has been isolated by DNA insertional mutagenesis. The phase, i.e., the time of the first maximum conidiaiton after transfer to continuous darkness, was delayed by several hours in comparison with that of the wild-type strain. Also, the germination of ascospores was seriously inhibited. The arrhythmicity which was observed at high temperatures may be due to a stoppage of the circadian clock.
