摘要
对日×长杂种子代进行了杂种优势、超亲优势、显性度等分析，并用树高、胸径、基本密度、管胞长度、管胞宽度、管胞长宽比６个性状对参试家系进行了无约束指数选择，结果表明：落叶松杂种优势是明显的、可利用的，但优势的大小则因亲本组合而异；杂种优势的比例随着树龄的增加有所下降；杂种因生长较快，木材基本密度有下降趋势。综合指数选择结果表明，日１×长１等４个杂种在生长和材性方面表现良好，是有推广价值的杂交种。
?8 Hybrid advantage, super parent advantage and obvious degree of Japan larch×Changbai larch filial generation was analysed. Using characters of height, diameter, base density, tracheid length, tracheid width and the ratio of tracheid length and tracheid width, the restrictedless index of experimental families was selected. It shows that the hybrid advantage of larch are obvious and applicable, but the advantage degree is varied with the parent combination; the proportion of hybrid advantage decreases with tree age increasing; the wood basic density of hybrid has the tendency of declining because of fast growth; synthetical index selection indicates that 4 hybrids such as Japan larch 1 × Changbai larch 1 etc. are better in growth and wood properties, having popularization worth.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
1998年第3期25-28,共4页
Journal of Northeast Forestry University
基金
国家科技攻关
黑龙江省自然科学基金
关键词
落叶松
生长
材质性状
杂种优势
指数选择
Larch
Growth─wood property
Hybrid advantage
Index selection
