ALLOZYMIC VARIATION AND REGIONAL DIFFERENTIATION IN WILD POPULATIONS OF THE FISH ORYZIAS-LATIPES
ALLOZYMIC VARIATION AND REGIONAL DIFFERENTIATION IN WILD POPULATIONS OF THE FISH ORYZIAS-LATIPES
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作者：
SAKAIZUMI, M;MORIWAKI, K;EGAMI, N
研究了采自53个地点的日本野生群体的21个等位基因座的等位酶变异。根据ADH、PGM、IDH和SOD基因座的独特等位基因，日本群体可分为北方群体和南方群体两大类群。在这些基因座上没有观察到倾斜性分布，但两个区域的边界非常明显。根据ACP、AMY、AAT、Me和PGD的独特等位基因，将南方群体进一步划分为5个亚群。在这种情况下，边界也是明确的。北方的人口非常同质化。南方人口是可变的。日本青竹野生种群在地区上有明显的分化。由于几乎没有观察到斜生分布，推测这种分化主要是由于地理上的隔绝。
Allozymic variation was studied at 21 loci in Japanese wild populations of the freshwater fish O. latipes, collected at 53 localities. By means of the unique alleles at the Adh, Pgm, Idh and Sod loci, the Japanese populations could be divided into 2 major groups, the northern population and the southern population. No clinal distribution was observed at these loci, but the boundary of 2 regions were very distinct. The southern population was further divided into 5 subpopulations by the unique alleles at Acp, Amy, Aat, Me and Pgd. In this case also, the boundary was clear. The northern population was very homogeneous. Southern population was variable. Japanese wild populations of medaka are remarkably differentiated regionally. As little clinal distribution is observed, it is supposed that the differentiation is primarily due to geographical isolation.