杂种落叶松优良家系选择研究

以8年生杂种落叶松21个处理为对象,对生长性状进行变异分析的结果显示:树高、胸径家系内存在较丰富的变异。其中,树高变异较大的前4个家系为日3×石51、兴5×兴9、兴9×日76-2、日5×长77-3,胸径变异较大的前4个家系为日3×石51、兴5×兴9、兴7×日77-2、兴9×日76-2。对比5年与8年生杂种落叶松生长性状变化的结果显示:兴6×和6、日11×兴2、日12×兴9这3个家系表现出较快的生长速度,年平均树高、胸径生长量较大。对杂种落叶松3次测量数据进行相关分析的结果显示:8年生树高、胸径与5年、6年生长性状均为正相关,且均达到显著水平。对8年生杂种落叶松树高、胸径数据进行方差分析的结果显示:生长性状杂种间差异达到显著水平。最终选择兴6×和6、兴7×日77-2、日11×兴2这3个家系为杂种落叶松优良家系,其平均树高与胸径遗传力分别为0.652、0.619,遗传增益分别为45.08%、39.97%。

Research on hybrid larch superior families selection

Based on the 8 -year- old hybrid larch as an object, analyzed the growth traits variation, the results showed that there were rich variations on tree height and DBH within the families. L. kaempferi 3 × L. olgensis 51, L. gmelini 5 × L. gmelini 9, L. gmelini 9 × L. kaempferi 76 - 2, L. kaempferi 5 × L. olgensis 77 - 3, are much more variations. Large DBH variations are L. kaempferi 3 × L. olgensis 51, L. gmelini 5 × L. gmelini 9, L, gmelini 7 × L. kaempferi 77 -2, L. gmelini 9 × L. kaempferi 76 - 2. Compared with 5 - year - old and 8 - year - old growth traits, the results showed ： L. gmelini 6 × L. olgensis 6, L. kaempferi 11 × L. gmelini 2, L. kaempferi 12 x L. gmelini 9 showed a fast growth speed, the annual average tree height and DBH growth are high. The correlation analysis results showed that 8 - year - old height and DBH were positive correlation 5 - year - old, 6 - year - old growth traits was positive correlation, and relevant had reached significant level. The variance analysis results showed that growth traits among hybrid larch families reached significant level. Finally we thought L. gmelini 6 × L. olgensis 6, L. gmelini 7L. × kaempferi 77 - 2, L. kaempferi 11 × L. gmelini 2 were the superior hybrid larch families, tree height and DBH heritability were 0. 652, 0. 619, the genetic gain were 45.08% and 39.97%, respectively.