摘要
为了改良白花泡桐的干形，对树冠结构、生长性状与干形的遗传相关进行了剖析和通径分析，计算出主要树冠性状、生长性状对干形的６３个选择指数方程。结果表明，胸径、小枝数、分枝总长、冠表面积和树高对形数、圆满度的决定系数在０．４０５～０．９４０和０．４２６～１．０６４之间。由以上５性状和形数或圆满度组成的综合选择指数方程效果最好。对形数选择的遗传进度、相对效率分别为０．１５５和１５９．０１５７％。对圆满度选择的遗传进度、相对效率分别为０．１７４和１２８．３６７９％。
To improve the tree trunk form of Paulownia fortunei,the genetic,pheno-type and
environment correlation between tree crown,growth characteristics,stem form inP. .fortunei
were analyzed on the basis of quantitative genetics,their direct and
indirectpath-coefficients.The results show that the determination coefficient of the
characteristics ofgrowth and tree crown to stem form in P,fortunei is higher in diameter,amount
of thinbranches total length of branches, surface area of tree crown and tree height.he
advantageof genetics and relative efficiency of selecting index of single character of stem form
is smallerthan the that of directly selected.Selecting indexes of multishare characters is better
thanthat of the single character. Genetic advantages and relative efficiency of selecting index
thatwas made up of a number of thin branch,diameter, total length of branches,surface area
oftree crown and tree height is best in the 61 selecting indexes. GS and RGS of
comprehensiveselecting index of fullness and trunk form is 0.155,159.015 7%and
0.174,128.367 9%re- spectively.It is effective to use multishare comprehensive selecting index
for tree valuationand selection the stem form improvement of Paulownia clones.
出处
《林业科学研究》
CSCD
北大核心
1995年第1期82-87,共6页
Forest Research
基金
国家"八五"攻关
关键词
白花泡桐
树冠
结构
生长性状
干形改良
Paulownia ,tree crown structure,growth characteristics,improvement oftree trunk form
