Saccharomycodes ludwigiiの単胞子培養株について : (第6報) 栄養細胞間交雑による異核接合体の形成 : (その2) 両親型および三倍体, 四倍体細胞や二核体細胞の形成過程

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The conjugation of a haploid and a homozygous diploid cell or two homozygous diploid cells of opposite agglutination types (X and Y) has provided further evidence that the occurrence of dicaryotic nuclear division, i. e., conjugate division, followed by delayed fusion of parental nuclei, leads to the formation of daughter cells (B_1 and B_2) of both parental types each from terminal locations of a zygote-like cell, and of a nonagglutinative type (Z) cell (B_0) at the midpoint of a conjugation tube.However, when the parental nuclei were fused, before the nuclei divided by conjugate division, the resulting B_0 cells were triploid or tetraploid, i.e., they were hybrids. On the other hand, when the compatible nuclei were not fused after the conjugate division, the resulting B_1 and B_2 cells were of both parental types and the B_0 cells were dicaryons, i. e., binucleate cells.The strains derived from these parental type cells were homogeneous and predominantly of the X type, perhaps due to the faster nuclear division, whereas a heterogeneous cell population was produced from the dicaryons mentioned above. Actually, the segregation of the agglutination type alleles in one of the strains originated from the dicaryon showed the population to be composed of heterozygous diploid, triploid, and tetraploid cells. In these mixed cell populations, the agglutination type declined from a weak X type to the Z type as described in the previous paper, probably because of the predominance of triploid or tetraploid cells over the homozygous diploid cells of the X type.
社団法人日本生物工学会の論文
1971-10-25

Saccharomycodes ludwigiiの単胞子培養株について : (第6報) 栄養細胞間交雑による異核接合体の形成 : (その2) 両親型および三倍体, 四倍体細胞や二核体細胞の形成過程

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