GENETICS OF PHYTOPATHOGENIC FUNGI: IX. HETEROCARYOSIS AND THE PARASEXUAL CYCLE IN PENICILLIUM ITALICUM AND PENICILLIUM DIGITATUM

Abstract

Ten nutritionally deficient strains of Penicillium italicum with mutant colors were involved in 13 heterocaryons. Three heterocaryons yielded diploid strains. Not all possible genotypes were present among the segregants from the diploids. One case of presumptive linkage was detected. Seven nutritionally deficient strains of P. digitatum with mutant colors were involved in five combinations to obtain heterocaryons. Heterocaryosis could not be definitely demonstrated in this species.