长白落叶松种群地理变异研究

根据17年生长白落叶松种源试验资料,从生态遗传学的观点出发,采用典型相关分析等方法,揭示了长白落叶松地理变异规律可以认为,以海拔垂直梯度为主、纬向渐变为辅的连续型变异;低海拔、低等效纬度的小北湖种源是长白落叶松优良基因资源中心,生长较快、生长期较长;水热因子的综合选择作用是长白落叶松地理变异的重要因素,其中温度是主导因子;在地理种群的遗传分化中,生长性状的分化最为明显,可以作为种源区区划的主要性状;从长白落叶松分布的低等效纬度地区向高等效纬度地区调种(一般不超过2个等效纬度),可望获得较大的遗传增益.

Geographic variation of Larix olgensis.

Based on the data of provenance test for 17 years in the whole natural distrbution range of Larix olgensis,the geographic variation patterns were analyzed by canonical correlation analysis(CCA).The results showed that the basic variation patterns of Larix olgensis,and it had the genetic character of rapid growth and long growing period.The synthetical interaction between water and heat factors mainly caused the variation of Larix olgensis,and among those factors,the temperature was the key factor.Among the genetic variation of geographic population characters,the variation of growth character was the most obvious,and it could be taken as the main character for provenance division.Allocating seeds from low equivalent latitude region to northern suitable afforestation areas(within 2 equivalent latitudes)would bring on great genetic gain.