Allozyme variation of Fagus crenata in northeastern Japan
Takahashi, M. | Tsumura, Y. | Nakamura, T. | Uchida, K. | Ohba, K.
Genetic variation of Fagus crenata Blume was investigated in 14 populations of the Hokkaido and Honshu regions of northeastern Japan. Within populations, averages for the proportion of polymorphic loci (95% criterion), the number of alleles per locus, the effective number of alleles per locus, the expected average heterozygosity, and the observed average heterozygosity were 58.2, 2.63, 1.34, 20.2, and 16.0%, respectively. The relative magnitude of gene differentiation and the average genetic distance among populations were 0.014 and 0.002, respectively. The inbreeding coefficient averaged 0.036. Overall, we detected 24 rare alleles (less than 5% of the allele frequency). The genetic composition of Honshu and Hokkaido populations was essentially the same, except for the five rare alleles absent in Hokkaido populations. These results indicate that Hokkaido populations may have experienced a partial bottleneck in the process of seed dissemination from Honshu.
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