Intraspecific geographic variation and primary selection on the best provenance ofPinus sylvestris var.mongolica

This paper summarizes the result from the provenance test of eight years oldPinus sylvestris var.mongolica in Liangshui Natural Reserve comprehensively. The main contents include:(l) the geographic variation of the growth characters ofPinus sylvestris var. mongolica, tends to negative change gradually at latitude and has obvious climatic nature, (2) no significant difference exists in the morphological adaptability and resistant characteristics and so on; (3)on the basis of the geographic variation study on the growth characteristics, the provenances ofPinus sylvestris var.mongolica were classified into two geographic populations and two subpopulations as follows: the northern population of the Daxing’an Mountain (I) and the southern population of the Daxing’an Mountain as well as the Xiaoxing’an Mountain (II), which includes Honghuarji subpopulation (II -1) and Kalunshan subpopulation (II-2). (4) the height growth rhythm was analyzed according to the divided population and subpopulation; (5) the best provenance was selected for the Liangshui Natural Reserve and its neighborhood according to the results from SSR test of the growth characteristics (the breast height diameter and height of eight year old trees), the possibility of the early provenance selection was also verified by the method of order correlation analysis on the height growth of three, five, seven and eight years old provenances.