云南松不同组合杂交种苗期生长分析

Seedling Growth of the Different Combinations of Pinus yunnanensis Hybrids

为详细了解云南松杂交育苗及苗期生长情况,对云南松51个杂交组合和19个半同胞苗木的苗高和地径生长性状进行了测定与分析,结果表明,38个云南松种内杂交种幼苗苗高与地径生长差异大部分达到极显著水平,有15个种内杂交种的苗高生长值超过了总体平均值,有18个种内杂交种的地径生长值超过了总体平均值;云南松种内杂交相同母本的不同杂交组合类别之间的苗高和地径生长差异大部分达到极显著水平,有11个类别杂交种的苗高和地径生长均显著高于半同胞苗木的生长性状;13个云南松与思茅松种间杂交种幼苗苗高与地径生长差异均达到极显著水平,有7个种间杂交种的苗高和地径生长均超过了总体平均值;云南松与思茅松种间杂交种的苗高总体均值约是云南松种内杂交种苗高总体均值的1.4倍,二者的地径生长均值基本接近;云南松与思茅松种间杂交相同母本的不同杂交组合类别之间的苗高生长差异均达到极显著水平,地径生长差异不显著,有4个类别杂交种的苗高和地径生长均显著高于半同胞苗木的生长性状。

The growth traits of seedling height and ground diameter of 51 Pinus yunnanensis hybrid combinations and 19 half-sib seedlings were measured and analyzed in this study. The results showed that significant differences existed in the seedling height and ground diameter among the most 38 P. yunnanensis hybrids, the height growth of 15 hybrid seedlings exceeded the overall average value, the ground diameter growth of 18 hybrids was higher than that of the population value ; The seedling height and ground diameter growth of different hybrids in the intraspecif- ic hybridization with the same female parent had highly significant differences, the growth traits of 11 hybrids were significantly higher than that of half-sib seedlings ; The growth traits of 13 hybrid seedlings of P. yunnanensis × P. kesiya var. langbianensis showed significant difference, and the seedling height and diameter growth of 7 hybrids were higher than the overall average value; The mean value of seedling height of P. yunnanensis×P, kesiya hybrids was about 1.4 times than that of the P. yunnanensis hybrids , and the average ground diameter growth of the two type was close; The seedling height growth of different hybrids of P. yunnanensis and that of P. kesiyavar. langbianensis, with same female parent, reached extremely significant difference, while the difference of ground diameter growth was not significant, and the growth traits of the 4 categories were significantly higher those of the half-sib seedlings.