为筛选出优良的滇楸无性系，研究了61个滇楸无性系的生长情况，并通过聚类分析筛选出优良滇楸无性系。结果发现，无性系胸径变化范围1.47~4.55 cm，平均为2.57 cm；树高变化范围在1.44~3.58 m，平均为2.27 m。方差分析发现，无性系间胸径和树高均存在显著差异。采用胸径和树高2个生长指标对所有无性系进行聚类分析，61个无性系可明显的划分成4类，且各类间两指标均存在显著差异。筛选出040、36-1、gz-11、yn-031-2、yn-041-5、yn-042-1、yn-1、yn-2、yn-36、109-1、142-2等11个无性系具有较大的胸径和树高，可作为今后滇楸无性系的重点推广对象。
Abstract
Sixty-one Catalpa duclouxii clones, were induced to choose better clones in Dongtai City, Jiangsu Province. Growth indices, such as diameter at breast height (DBH), height (H), were monitored in a Catalpa duclouxii test forest. The range was 1.47-4.55 cm, with the mean of 2.57 cm, for DBH, and 1.44-3.58 m, with mean of2.27 m for H. 61 clones were clustered to 4 group through cluster analysis, and significantly differences were found among these 4 groups for DBH and H. 040, 36-1, gz-11, yn-031-2, yn-041-5, yn-042-1, yn-1, yn-2, yn-36, 109-1, 142-2 were chose out due to higher DBH and H. These 11 clones could be pay more attention to.
关键词
滇楸无性系； 树高； 胸径； 聚类
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Key words
Catalpa duclouxii clones; height; breast height; cluster analysis
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