Geographic Variation Pattern of Larix olgensis

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Geographic Variation Pattern of Larix olgensis

On the basis of the data of provenance test for 10 years in the total natural rangc of Larix olgensis from10 seeds collection sitcs, the geographie variation patterns have been made by means of canonical correlation analysis; (1)The basic variation patterns of growth characters is in vertical grudual change along the elevation gradient as principal, andgradual change along the latitude as supplement. (2) The Xiaobehu 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, high stability and finetimber quality. (3) The synthetical interaction between water and heat factors is the major factor to produce the variation ofL. olgensis and the tempcrayurc is the principal one. (4) Among the genetic variations of geographic population characters,the variation of growth is the most obvious one, and it could be taken as the main character for provenance division. (5) Byallocating the secds from the low equivalent latitude region to the northem suitable afforestation areas, the greater geneticgain could be obtained.