Factor analysis of geographic variations and molecular

本文分析了日本鼹鼠属Mogera的地理大小变异和分子进化因素。小鼹鼠M.minor的260个标本来自本州和四国的27个地点，M.wogura的280个标本来自本州、四国和九州的23个地点，M.tokudaM.41个标本来自本州和佐渡岛。作为大小变异的生境因子，利用附近气象站的5个气象资料，对生境面积（以稻田面积表示）、土壤硬度进行回归分析。鼹鼠的地理大小变化与栖息地面积呈正相关，但与温度和降水的关系因鼹鼠种类不同而不同：尾仓鼹鼠的大小与年平均最低气温呈负相关，而小鼹鼠的大小与年平均气温呈正相关。土壤硬度（软土层深度）与鼹鼠的大小无显著相关，细胞色素c氧化酶亚基Ⅰ基因的核苷酸序列和20个位点的同工酶分析与Abe（1967）提出的鼹鼠分类学一致，表明鼹鼠在地方种群中存在一定的种内变异。

We analized factors of geographic size variations and molecular evolution of Japanese moles, genus Mogera, Consisting of 260 specimens from 27 localities in Honshu and Shikoku in M.minor, 280 specimens from 23 localities in Honshu, Shikoku and Kyushu in M.wogura, and 41 specimens from Honshu and Sado Island in M.tokudae. As the habitat factors for the size variations, the size of habitat area (indicated by the area of paddy field), soil hardness, five meteorological data taken by nearby meteorological stations were employed for regression analysis. Geographic size variations of moles showed positive correlation with the size of habitat area, but the relation with temperature and precipitation was different according to the species of moles : The size of M.wogura varied negatively with mean minimum temperature and that of M.minor had a positive correlation with yearly mean temperature. Soil hardness (soft soil depth) did not have any significant correlation with the size of mole.The nucleotide sequences of the cytochrome c oxidase subnit I gene and isozyme anaysis of 20 loci well agreed the mole taxonomy presented by Abe (1967) and showed that there are some intraspecific variations in local populations of the moles.