东北林蛙8个地理种群的形态聚类分析

目的]确定东北林蛙系统地理分布图。方法]对长白山和小兴安岭自然分布的东北林蛙8个地理种群的4个形态指标(体长、体重、前肢长和后肢长)进行测定,并对测定结果进行方差分析和聚类分析。结果]形态学分析表明,雄性种群中,属于完达山的东方红种群与小兴安岭种群和长白山种群存在明显的形态差异(P<0.05);雌性种群中,属于小兴安岭种群的鹤北种群与长白山种群存在明显的形态差异(P<0.05)。聚类结果显示,雄性东北林蛙可以分为3组:泉阳、天北、朝阳、大口钦种群一组,铁力、鞍山种群一组,东方红种群一组;雌性东北林蛙也可聚为3组:泉阳、朝阳一组,天北、大口钦一组,鹤北种群一组。结论]三江平原极有可能是东北林蛙的地理起源中心,东北林蛙沿着松花江逆流向长白山和小兴安岭2个地区适应辐射,形成现有的东北林蛙地理分布格局。

Cluster Analysis of Morphologic Characteristic of Eight Geographical Populations of Rana Dybowskii

Objective] The research aimed to determine the geographic distribution map of system of Rana dybowskii.Method] Four morphologic indices(body length,body weight,forelimb length,hindlimb length) of eight geographical populations of R.dybowskii which naturally distribute in Changbai Mountain and Xiaoxing′an Mountain were measured.Measure results were variance analyzed and cluster analyzed.Result] Variance analysis showed: the genetic branching among the Dongfanghong male population(belongs to Wandashan) and Xiaoxing′an Mountain male population and Changbai Mountain male population were significantly different(P<0.05);the genetic branching between the Hebei female population(belongs to Xiaoxing′an Mountain) and Changbai Mountain female population was significantly different(P<0.05).Cluster analysis showed: male R.dybowskii can be divided into three groups: the first group included Quanyang,Tianbei,Chaoyang and Dakouqin,the second group included Tieli and Anshan,the third group included Dongfanghong;and the female R.dybowskii can be divided into three groups: the first group included Quanyang and Chaoyang,the second group included Tianbei and Dakouqin,the third group included Hebei.Conclusion] The paper deduced that the Sanjiang Plain was the geographical origin center of R.dybowskii which radiated to Changbai Mountain and Xiaoxing′an Mountain along the adverse current of Songhua River basin,therefore,the current distribution pattern of R.dybowskii was formed.