Tsuruga H, Mano T, Yamanaka M, Kanagawa H
Department of Theriogenology, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Japan.
Jpn J Vet Res. 1994 Dec;42(3-4):127-36.
Genetic variations within and between local populations of Hokkaido brown bears, Ursus arctos yesoensis, were quantified by means of DNA fingerprinting using a minisatellite DNA probe. The estimates of the average heterozygosity (gene diversity) H were 0.302 and 0.241 for the populations on the southwestern part of the Oshima peninsula and the Shiretoko peninsula, respectively. These values suggest that local populations studied in this study have low genetic variability compared with those for other animals. The degree of genetic differentiation between the populations, measured by the coefficient of gene diversity (GST), was 7.9 percent and 19.5 percent. These results indicate a low degree of genetic differentiation between the local populations. The results obtained are discussed in relation to a population bottleneck in the ancestors and subsequent expansion of their habitat.
利用小卫星DNA探针，通过DNA指纹技术对北海道棕熊（Ursus arctos yesoensis）当地种群内部和种群之间的遗传变异进行了量化。大岛半岛西南部和知床半岛种群的平均杂合度（基因多样性）H估计值分别为0.302和0.241。这些值表明，本研究中所研究的当地种群与其他动物相比，遗传变异性较低。用基因多样性系数（GST）衡量的种群间遗传分化程度分别为7.9%和19.5%。这些结果表明当地种群间的遗传分化程度较低。结合祖先种群瓶颈及其栖息地随后的扩张，对所得结果进行了讨论。
