アロザイムによるアカエゾマツとエゾマツの天然雑種の同定

抄録

Trees showing intermediate morphological characteristics between Picea glehnii MAST, and Picea jezoensis CARR. occur in natural forests in Hokkaido, Japan. Their allozyme variations were analyzed by electrophoresis. By the analysis of 14 enzyme systems for artificial hybrids of P. glehnii and P. jezoensis, we detected one locus for glycerate-2-dehydrogenase (G2DH) and one locus for glutamate dehydrogenase (GDH) respectively. P. glehnii and P. jezoensis in a natural forest had different genes at Gdh. The intermediate individuals could be divided into Types A and B by morphological characteristics. Type A individuals had genes from both populations of P. glehnii and P. jezoensis. It suggested that Type A individuals are the F₁ hybrids between these two species. Type B individuals had no genes from the population of P. glehnii, but had only genes from the population of P. jezoensis. Therefore Type B individuals were not confirmed as hybrids by this analysis.