西南桦苗期生长性状的地理种源变异  

Geographical Provenance Variation in Growth Traits of Betula alnoides at Seedling Stage

作　　者：陈伟[1] 陈宏伟[1] 杨斌[2] 史富强[2] 陈绍安[2] 徐玉梅[2] 李江[2] 孟梦[2] 冯弦[2] 

机构地区：[1]国家林业局云南珍稀濒特森林植物保护和繁育实验室(云南省林业科学院),昆明650204 [2]云南省林业科学院

出　　处：《东北林业大学学报》2011年第12期12-15,共4页Journal of Northeast Forestry University

基　　金：国家林业公益性行业科研专项项目(200704041);中央财政林业科技推广示范项目(2009TQYN01)

摘　　要：利用滇西南9个种源80株西南桦优树种子在云南镇沅、龙陵、瑞丽进行苗期多点试验,研究不同种源的苗木生长差异、种源与环境互作效应及地理变异模式。结果表明:西南桦苗高、地径生长在两个试验点存在显著的种源效应,西南桦地理种源分化明显。种源×地点交互作用显著,不同种源在各试点上的生长相对表现差异显著。苗高与种源地纬度表现出显著的负相关,呈典型的纬向地理变异模式,产地温度是造成纬向变异模式的主要环境作用因子。Seedling tests were conducted at Zhenyuan, Longling and Ruili of Yunnan Province to study the provenance difference, provenance-environment interaction and geographic variation pattern of seedling growth of 80 plus trees of Betula alnoides from 9 provenances. Significant differences among provenances were detected in seedling height and ground diameter of B. alnoides seedlings at Zhenyuan and Ruili. Highly significant differences were also observed in provenance-environment interaction. The relative growth performance of B. alnoides seedlings from different provenances varied greatly in different experimental sites. Seedling height appeared to be significantly negatively related to the latitude of seed sources, and temperature in seed source was the main climatic factor leading to this variation pattern.

关 键 词：西南桦 种源试验 苗期性状 地理变异 

分 类 号：S722[农业科学—林木遗传育种]