| 摘要: |
| 对3.5年生42个木麻黄无性系对比试验林的7个性状进行了方差分析、遗传参数估算、相关分析，并进行了优良无性系的筛选。结果表明：7个性状在无性系间均有极显著差异；树高、胸径、地径的重复力较高，分别为0.809、0.758、0.737，遗传力较大，选择具有较好的效果；遗传相关分析显示，地径、树高、冠幅、通直度这4个性状之间存在遗传高度相关性；树高与冠幅早晚期相关分析显示，遗传相关和表型相关的强度趋势一致，而且相关系数值要大于表型的值。最后，筛选出8生个长迅速、适应性强的优良无性系及4个抗逆性强，冠幅开展，但树高、胸径生长缓慢的无性系。高径生长缓慢的无性系可用于与生长迅速的无性系材料进行混交，形成高低错落有致的复层混交结构，提高林分的防护功能。 |
| 关键词: 木麻黄 无性系 筛选 对比试验 |
| DOI： |
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| 基金项目:省科技厅农业攻关项目“木麻黄优良新品种选育研究”，2003～2007；省林业局林业科技计划“沿海防护林优良树种选育研究”，2004～2006 |
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| Study on Forestation effect of the different |
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Xu Xiuyu
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| Abstract: |
| Based on 7 traits of 3.5 years old of 42 Casnarina equisetifolia clones, analysis of variance, correlation, genetic parameter estimation were carried out, and the better clones have been selected. Results showed that there were significant diferences in 7 trait values between clones. The repeatability of height, diameter at breast height(DBH) and collar diameter were high, respectively 0.809, 0.758, 0.737. Analysis of genetic correlation indicated that the 4 traits of height, collar diameter, crown breadth, stem straightness have significant correlation between each other. Analysis of DBH and crown breadth correlation indicated that the intensity trend of genetic correlation and phenotypic correlation is accord, and the value of genetic correlation coefficient is bigger than phenotypic correlation. |
| Key words: Casnarina equisetifolia, clones, screening, contrast test |
