兰考泡桐无性系自然接干性状的遗传变异研究  

The Study on Genetic Variation of Natural Stem-join Characters of Paulownia elongata Clones

作　　者：叶金山[1] 孟伟[1] 谢青[1] 胡伟华[1] 杨文萍[1] 

机构地区：[1]国家林业局,泡桐研究开发中心,河南郑州450003

出　　处：《西北林学院学报》2008年第6期83-86,共4页Journal of Northwest Forestry University

基　　金：河南省自然科学基金项目(0611032600)

摘　　要：利用田间试验和统计分析的方法研究了兰考泡桐无性系自然接干性状的遗传变异规律。结果表明:(1)有8个自然接干性状(接干高、主干材积、接干材积、全干材积、接干材积/全干材积、接干形数、通直度、丛枝病等级)属于高度变异型(CV≥30);有10个自然接干性状(主干高、全干高、胸径、主干基径、主干1/2径、主干端径、接干1/2径、主干材积/全干材积、接干形率、主干平均削度)属于中度变异型(15≤CV<30);有4个自然接干性状(树高、主干形数、主干形率、冠幅)属于低度变异型(CV<15)。(2)接干高性状在影响和决定兰考泡桐无性系自然接干性状的总体表现上起着重要作用。(3)改良兰考泡桐的自然接干类型是改良兰考泡桐通直度和削度性状的关键。(4)一元方差分析表明,通直度性状存在显著性差异,而其余的自然接干性状都存在极显著差异。(5)多元方差分析证明,无性系间自然接干性状存在极显著差异。The genetic variation of natural trunk extension of Paulownia elongata clones was studied by means of field test and statistical analysis.The results showed that:(1)eight natural trunk extension characters-height,main stem volume,trunk volume,whole-stem volume,trunk volume/whole-stem volume,form factor of trunk,straightness of stem and witches' broom grade belonged to the grade of extremely significant variation(coefficient of variation ≥ 30);ten natural trunk extension characters-height of main stem,height of whole-stem,DBH,basal diameter of main stem,diameter at half main stem height,diameter at top end of main stem,diameter at half trunk height,main stem volume/whole-stem volume,from-quotient of main stem and mean taper of main stem belonged to middle grade variation(15≤coefficient of variation<30);whereas four natural trunk extension characters,which were height of tree,main stem form-factor,main stem form-quotient and crown breadth,belonged to the low grade variation(coefficient of variation<15);(2) height of natural trunk extension played an important role in affecting and determining overall performance of natural trunk characters of P.elongata clones;(3) the key to improve straightness of stem and taper of P.elongatawas to improve its natural trunk extension;.(4) univariate analysis of variance proved both straightness of stem had significant difference among while the other 21 natural trunk extension had extremely significant difference;(5)multivariate analysis of variance proved natural trunk extension characters had extremely significant difference among the clones of P.elongata;(6)Duncan analysis showed Duncan Grouping of natural trunk characters by clones of P.elongata;(7) principal component analysis not only determined the top three principal components but also their respective contribution rate as wel as their accumulative contribution rate.

关 键 词：兰考泡桐 无性系 自然接干性状 遗传变异 

分 类 号：S792.430.4[农业科学—林木遗传育种]