大兴安岭北段天然樟子松林遗传多样性与主要生态因子的相关性研究

该文利用ISSR技术分析了大兴安岭北段4个不同海拔梯度、3个不同群落及3个纬度梯度的樟子松天然林群体的遗传多样性及遗传分化.16个筛选出的随机引物在3组共240株个体中，分别检测出162、156和169个多态位点，总多态位点的百分率分别达到85.26%、82.11%和88.95%,樟子松天然林群体具有较高的遗传多样性.在海拔、群落和纬度等不同的尺度上，樟子松天然林群体间的遗传变异较低，遗传变异多来自群体内部.海拔及纬度因子显著影响樟子松天然林群体的遗传多样性水平，不同群落类型对群体的遗传多样性影响不大. 

Corelativity analysis between the main ecological factors and genetic diversity of Pinus sylvestris var. mongolica population in the north part of Great Xing' an Mountains

The genetic diversity of different natural Pinus sylvestris var. mongolica populations was analyzed along four altitude grades, three community types and three latitude grades by using ISSR DNA technique. Sixteen arbitrary primers were selected in the amplification, 162,156 and 169 polymorphic loci were produced in three groups with 240 sampled individuals. The total percentages of polymorphic loci reached 85.26 %, 82.11% and 88.95 % in three groups, which indicated the higher genetic diversity of natural P. sylvestris var. mongolica populations in the study area. Along the altitude, community and latitude factors, the genetic variations among the populations were relatively low. The genetic variations were mainly occurred within P. sylvestris var. mongolica populations. Genetic diversity of P. sylvestris var. mongolica was notably affected by the altitude and latitude, and little influenced by the community types in the study area.