雷公藤速生无性系的早期选择研究
首发时间:2008-12-31
摘要:以23个雷公藤优良单株为试验材料,开展雷公藤速生无性系的早期选择研究结果表明:雷公藤根扦插平均成活率为94.4%,扦插苗生长呈现出“快--慢--快--停”年生长节律;1.5年生苗木的枝数、地径、主藤长生长量差异达到显著性水平,枝数、地径的广义遗传力分别为0.3612、0.4664;通过聚类分析,23个无性系划分为粗壮型、伸展型、中间型、普通型4个生长类型;苗木生长性状之间存在显著的相关性,以地径、枝数为选择性状开展联合选择,选出11、7、4、2、8、9、13、15、6、17号共10个苗期速生无性系。
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Research on early selection ofTripterygium wilfordii Hook.f fast growing clone
Abstract:The average survival rate of the cuttings from the 23 plus trees was 94.4% and no disease or insect damage was found. The TW cuttings grow rhythm is typical as “rapid- slow –speed -stop”. The variance of BN(branch number), GD(ground diameter), ACL(main cane length) at 1.5-years-old plantlets is visible and the generalized heritibility of BN, and GD are 0.3612 and 0.4664 respectively. The growth of the 23 clones is better than the checked and the 23 clones can be classified into 4 groups by hierachical cluster analysis, ie. the sturdy, stretch, mdiate and normal. A general correlation was found among the 3 growth traits in the seedling stage, of which GD is the central trait correlated with the others. Using GD and BN as the select criteria, 10 elite clones were selected with rapid growth at nursery stage and their average growth gain of BN and GD was 10.17% and 22.75% respectively, compared to the average of the 23 clones.
Keywords: Tripterygium wilfordii Hook.f clonal test early selection broad heritability
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