云南松地理种源表型性状生长比较研究

Growth Comparison of Phenotypic Characters of Pinus yunnanensis from Geographical Provenances

对玉溪市玉白顶国有林场收集保存的23个种源4年生林木生长进行观测。结果表明,云南种源的云南松表型性状生长量大于四川种源的,11个云南种源的云南松树高、地径、冠幅、枝下高和针叶长分别为2.18 m、5.87 cm、1.16 m、0.58 m和18.79 cm,12个四川种源的云南松各表型性状值分别为1.50 m、4.49 cm、0.76 m、0.38 m和18.70 cm。不同地理种源的云南松在树高、地径、冠幅、枝下高和针叶长5个性状上均有较大差异,显示出明显的表型多样性,云南松表型性状在群体间和群体内均存在极其丰富的变异。

The growth of 4-year-old Pinus yunnanensis from 23 provenances collected and preserved in Yubaiding State-owned Forest Farm of Yuxi City was observed.The results showed that the growth of phenotypic characters of Pinus yunnanensis from Yunnan provenances was greater than that from Sichuan provenances.The height,ground diameter,crown width,height to crown and needle length of Pinus yunnanensis from 11 Yunnan provenances were respectively 2.18 m、5.87 cm、1.16 m、0.58 m and 18.79 cm while the phenotypic characters from 12 Sichuan provenances were respectively 1.50 m、4.49 cm、0.76 m、0.38 m and 18.70 cm.There were significant differences in tree height,ground diameter,crown width,height to crown base and needle length among different geographical provenances,showing significant phenotypic diversity,which varied greatly among and within populations.