Saccharomycodes ludwigii の単胞子培養株について : (第4報) 細胞の乾燥重量および DNA 含量と倍数性

概要

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The present paper reports the results of the studies on the polyploidy of 23 strains obtained mostly in the previous studies.The polyploid rates of these strains were estimated from their cellular dry weights and DNA contents of their intact cells compared with those of the strain O-81 (II) as the standard diploid.The polyploid rates of 18 agglutinative (X or Y type) strains (spore clones), in which no segregation of the agglutination-type alleles was found (i.e. 4X or 4Y), varied from 1.0 to 1.8,in accordance with an increase in frequency of ascus formation. Therefore, these cultured strains were considered to be mixtures of non-sporiferous haploid cells and sporiferous self-diploidized cells (homozygous diploid of agglutination-type) in various proportions.The polyloidy of 4 non-agglutinative strains of Z type (2 spore clones and 2 hybrids copulated spore to spore) which segregated regularly (i.e. 2X2Y), was about 2.0,and the polyploidy of those abundantly sporiferous strains was the same as that of the standard culture used (i.e. diploid).
社団法人日本生物工学会の論文
1970-11-25