1.5代杉木种子园不同无性系生长和结实性状的评价

为进一步优化1.5代杉木种子园的质量,通过对福建漳平杉木种子园内21个杉木无性系生长和球果特征的调查,分析不同无性系生长和结实性状的差异及其相互关系,采用层次分析法对不同无性系的生长性状和结实性状进行综合评价。结果表明:1.5代杉木种子园不同无性系之间的生长和结实性状存在明显差异;不同无性系的结实量、球果体积、球果鲜重与其种子产量显著相关,生长性状与结实量、结实量与种子发芽率的相关性不显著。根据不同无性系生长性状和结实性状的综合评价结果,有6个无性系具有生长快且结实量高的特性,可作为重建1.5代杉木种子园的材料。

Evaluation on Growth and Seed Characters of Different Clones in 1.5-generation Seed Orchard of Chinese Fir

In order to further optimize the quality of 1.5-generation seed orchard, the growth and setting characteristic of 21 Chinese fir (Cunninghamia lanceolata) clones in 1.5-generation of seed orchard at Wuyi State-owned Forest Farm, Zhangping, Fujian Province, were investigated, and the difference and relationship of growth and setting characters among clones were analyzed. The characters of growth and setting of 21 clones was comprehensively evaluated by the analytic hierarchy process (AHP). The results showed that there were significant differences in growth and setting characters among different clones in 1.5-generation seed orchard. There was significant correlation between seed yield and setting amount, volume, fresh weight of cone, but no significant correlation between growth characters and cone setting amount, seed germination rate, respectively. According to the comprehensive evaluation on growth and setting characters of different clones, 6 clones of Chinese fir were selected owing to fast-growing and high seed yield. It was suggested that they could be used as materials for reconstruction 1.5-generation seed orchard of Chinese fir.