Studies Concerning the inheritance of Ascospore Length in Neurospora Crassa II. Selection Experiments With Wild-Type Strains

Abstract

Various types of selection with respect to ascospore length were practised with wild-type strains of Neurospora crass(L. The effect of all types of selection over 11 generations was essentially the same. A significant increase in mean ascospore length, a tendency for a decrease in the coefficient of variation, and a decrease in fertility were observed in each case. These results are discussed and a hypothesis to explain them is put forward.