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本文在“中国兴安落叶松种源试验研究(Ⅰ)——兴安落叶松地理变异规律和模式”的基础上,依据16个采种点8年生子代的遗传表现,参考自然区划、植被区划等,把分布于我国大小兴安岭兴安落叶松划分成4个种源。它们是:(1)大兴安岭北部种源(编号Ⅰ);(2)大兴安岭中南部种源(编号Ⅱ);(3)大小兴安岭过渡种源(编号Ⅲ):(4)小兴安岭东南部种源(编号Ⅳ)。在种源区划的基础上,提出了种子的调拨范围和方向,并对兴安落叶松优良基因资源的富集中心区——小兴安岭东南部种源的研究和利用提出了意见。文章还按林业部规划的今后每年兴安落叶松造林面积,全部采用最佳种源造林时,以种源研究中平均遗传增益20％及凉水试验点8年生种源高生长遗传增益的下限44％为据,进行了经济效益的估算。
Based on the study on the provenance experiment of Larix gmelinii in China (Ⅰ) - Geographic variation of Larix gmelinii, based on the genetic performance of 8-year-old offspring at 16 sampling points, referring to the natural division and vegetation division, The distribution of the size of our country Xing’an Larix Larix size into four provenances. They are: (1) the provenance of northern Greater Hinggan Mountains (No. Ⅰ); (2) the provenances of central and southern Daxinganling (No. Ⅱ); (3) No. Ⅳ). Based on the zonation of provenances, this paper proposed the scope and direction of seed allocation and put forward opinions on the research and utilization of provenances in the southeastern Xiaoxing’anling, which is the center of rich gene for Larix gmelinii. According to the planted afforestation area of Larix gmelinii in the future by the Ministry of Forestry, all the best provenances were afforestation, the average genetic gain of 20% in provenance and the lower limit of 44% As a basis, carried out estimates of economic benefits.