抄録
Starch gel electrophoresis was carried out to estimate the degree of genetic differentiation and amount of genetic variability in a haploid layer, Porphyra yezoensis. Twelve isozyme loci were examined in three locations. Fst value which measure genetic differentiation was 0.623, indicating that the population structure of Porphyra yezoensis had caused more geographical genetic differentiation than many other diploid organisms. The proportion of poly-morphic loci was 0.333 and heterozygosity over 12 loci varied from 0.100 to 0.141 with a mean of 0.127. The overall mean is similar to those obtained for various diploid organisms. High levels of genetic differentiation and genetic variability in these haploid plants can be explained by their system of propagation.
