摘 要 ：采用AFLP技术对平泉县的1个油松-落叶松混交林和2个油松纯林中油松毛虫（Dendrolimus tabulaeformis Tsai et Liu）的135个个体进行了遗传多样性和遗传结构的研究，并调查了3个油松林群落的各种环境条件。结果表明，纯林中油松毛虫种群的遗传多样性高于混交林中的油松毛虫种群；林木生长状况为影响不同油松纯林群落中油松毛虫种群遗传多样性的重要因素；混交林对油松毛虫种群之间的基因流有阻断作用，油松毛虫种群的基因流大小与油松林之间的物种多度呈反相关。
Abstract:Genetic diversity and genetic structure of Dendrolimus tabulaeformis populations in 1 Pinus tabulaeformis- Dahurian larch mixed forest and 2 Pinus tabulaeformis pure forests from Pingquan county were analyzed by using amplified fragment length polymorphism (AFLP),and the environmental conditions of 3 forest communities were also investigated.The results showed that the genetic diversity of populations in pure forests was higher than that in mixed forest.The important factor which influenced the genetic diversity of tabulaeformis in different pure forests was the growth status of forests.Mixed forest has obstructing effect on gene flow.The gene flow between populations was nagetively related with the species abundance of the forest.