楸树优良无性系早期选择研究  

Study on Early Selection of Superior Clones of Catalpa bungei

作　　者：王秋霞 Wang Qiuxia(Nanyang Forestry Research Institute,Nanyang Henan 473000,China)

机构地区：[1]南阳市林业科学研究院,河南南阳473000

出　　处：《河南林业科技》2019年第4期12-16,共5页Journal of Henan Forestry Science and Technology

摘　　要：首先对收集汉江流域11个不同类型的楸树无性系的苗期物侯期、生长量、抽枝能力的观测分析。各个指标在无性系内差异不显著,在无性系间差异显著。进而对4 a生对比试验林楸树各无性系树高、胸径生长量、胸径生长位次及年度相关性进行了分析,选择出1号、2号两个优良无性系。通过对楸树无性系的测定,能够较早而准确地评价出楸树优树干性、分枝、抗性、生长量等受遗传基因的制约成度,达到林木早期选择和改良的目的。First of all,the observation and analysis on the seedling stage,growth and branch extraction ability of 11 different types of Catalpa bungei clones in Hanjiang River Basin were carried out.Each index has no significant difference within clones,but has significant difference among clones.Furthermore,the tree height,DBH growth,DBH growth order and annual correlation of each clone of Catalpa bungei in the four-year comparative test forest were analyzed,and two excellent clones,No.1 and No.2,were selected.Through the determination of Catalpa bungei clones,the degree of restriction of genetic genes on the superior trunk sex,branching,resistance and growth of Catalpa bungei can be evaluated early and accurately enough to achieve the purpose of early selection and improvement of trees.

关 键 词：楸树 无性系 早期选择 

分 类 号：S792.99[农业科学—林木遗传育种]