There were a lot of variation between provenances and families of Alnus formosana with consider-able potential of breeding. Seedling evaluation could offer reference for early selection of superior families of A. formosana. The growth indexes of 7-month seedlings of Alnus formosana within 65 families of 5 provenances were investigated by ANOVA analysis. There were differences or significant differences between provenances and families. Shuangliu and Weizhi provenances were better than the others. Using improved breggin multi-in-dex comprehensive evaluation method, and using seedling height, ground diameter and variable coefficient as evaluation indexes,13 superior families were selected. Their average seedling height and ground diameter were 69.60 cm and 4.19 mm,respectively,which were 12.44%and 10.85%higher than those of the popula-tion,respectively.%台湾桤木(Alnus formosana)种源和家系存在着较为丰富的变异,选育潜力大,苗期评价可为台湾桤木优良家系早期选择提供参考.本研究对台湾桤木的5个种源、65个家系7个月生苗木的生长指标进行分析,结果表明种源和家系间存在显著或极显著性差异,表现较好的是双流和卫子种源.采用改良后的布雷金多性状综合评定法,并以苗高、地径和变异系数为评价指标进行评价,初选出13个优良家系,其平均苗高69.60 cm、平均地径4.19 mm,分别比群体平均值高12.44%和10.85%.
展开▼
