Geographical variation of morphology characters for natural populations of Pinus koraiensis
天然红松种群形态特征地理变异的研究

Three typical habitats of Liangshui, Xiaobeihu and Changbai Mountain were selected according to the difference of altitude and latitude in natural distributive of Pinus koraiensis area of China. The needles length of the first class branches, the length and width of cones, the seed number of per cone, the weight per 1000 grains of seeds and the morphology of bark were measured. The results indicate that the average length of needles of Korean pine distributing in the middle part is longer than that in the Northern and Southern of China. The length of needles, has the highest variation (0 1486) within the Liangshui population,and lowest variation (0 1056)in Changbai Mountain population. There is an evident differentiation among the populations. For the morphological characters of cones, there is a big variation range and variation source. The width of cones has quite stable characters. The variation of morphological characters is 22 7% among the population and 77 3% within population, The frequency of individuals of F.pachiaermis Wang et Chi increase as the latitude rises.