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通过对兴安落叶松优树子代和长白落叶松种子园子代苗期及幼林的树高、直径和材积生长量观察和统计分析认为:两种落叶松子代存在丰富的遗传变异,苗期速生,幼林仍保持较大的生长优势,优良家系生长更为突出。兴安落叶松优树子代8a生材积比原产地对照大28.6％,优良家系大51.5％。长白落叶松种子园子代4a生树高比原产地对照大33.9％,优良家系大65.0％;兴安落叶松和长白落叶松主要生长性状具有较高遗传力,兴安落叶松树高、胸径、材积遗传力分别为0.58％、0.62、0.64;长白落叶松树高、地径分别为0.88、0.89;子代再选择遗传改良效果显著。兴安落叶松选择率为21.7％,材积遗传增益为32.8％。长白落叶松汪清和小北湖产地选择率分别为17.4％和35.0％,树高遗传增益分别为45.1％和33.7％;子代测定结果证明:兴安落叶松、长白落叶松初级种子园质量优良,能为生产提供良种。
Based on the observation and statistical analysis of tree height, diameter and volume growth of Larix gmelinii seedlings and seedlings of Larix olgensis in the seedlings of Larix gmelinii and Larix olgensis, the results showed that there were abundant genetic variations in the two larch progenies, Young forest still maintain a greater growth advantage, outstanding family growth is more prominent. Larix gmelinii seedlings on behalf of 8a raw material area larger than the control of origin 28.6%, 51.5% of elite families. Larix olgensis seedlings on behalf of 4a generation tree height 33.9% larger than the origin control, elite families 65.0%; Larix gmelinii and Larix olgensis main traits have high heritability, Larix gmelinii height, DBH, heritability Respectively, 0.58%, 0.62,0.64; tall white larch tree height, diameter were 0.88,0.89; offspring and then choose a significant genetic improvement. Larix gmelinii selection rate of 21.7%, volume genetic gain of 32.8%. The selection rates of Wangqing and Xiaobeihu producing areas were 17.4% and 35.0% respectively, and the genetic gain of tree height were 45.1% and 33.7% respectively. The progeny results showed that the quality of primary seed orchard of Larix gmelinii and Larix gmelinii was good, For the production of seed.