【摘要】 利用10年生长白落叶松全分布区种源试验的生长资料,从生态遗传学的观点出发,采用典型相关分析等方法,揭示了长白落叶松生长性状的地理变异规律与模式:(1)海拔垂直梯度渐变为主、纬向渐变为辅的连续型变异是长白落叶松生长性状的基本变异模式;(2)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,其遗传特点是生长快、稳定性好、材性优良;(3)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;(4)在地理种群性状的遗传分化中,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;(5)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,可望获得较大的遗传增益。更多还原

【Abstract】 On the basis of the data of 10-year old provenance testing in the total range of the Larix olgensis distribution from 10 seed collection sites, the geographic variation rule and pattern of the growth characters have been made by means of canonical correlations analysis. (1) The basic variation pattern of the growth characters is in vertical gradual change along the elevation gradient as principal and gradul change along the latitude as supplement. (2) The Xiaobeihu provenance with low elevation and low equivalent latitude is the good gene resource center of L. olgensis. It has the genetic characters of rapid growth, good stability and fine timber quality. (3) The synthetical interaction of water and heat factors is the major factor to produce the variations of L. olgensis and the temperature is the principal one. (4) Among the genetic variations of geographic population characters, the variation of growth is the most obvious. It could be a main character of provenance division. (5)By allocating the seeds from the low equivalent latitude region to the northern suitable afforestation areas, the greater genetic gains can be obtained.更多还原