杉木高世代杂交子代生长与木材性状遗传分析  

Genetic analysis of growth and wood character of advanced generation hybrid offspring of Chinese fir

作　　者：牛慧敏 张振[2,3] 邱勇斌 沈汉 徐金良 何贵平 NIU Huimin;ZHANG Zhen;QIU Yongbin;SHEN Han;XU Jinliang;HE Guiping(National Key Laboratory of Forest Tree Genetic and Breeding,Northeast Forestry University,Harbin,Heilongjiang 150040,China;Research Institute of Subtropical Forestry,Chinese Academy of Forestry,Hangzhou,Zhejiang 311400,China;Zhejiang Provincial Key Laboratory of Tree Breeding,Hangzhou,Zhejiang 311400,China;Kaihua County Forest Farm,Kaihua,Zhejiang 324300,China)

机构地区：[1]东北林业大学林木遗传育种全国重点实验室,黑龙江哈尔滨150040 [2]中国林业科学研究院亚热带林业研究所,浙江杭州311400 [3]浙江省林木育种技术研究重点实验室,浙江杭州311400 [4]开化县林场,浙江开化324300

出　　处：《森林与环境学报》2024年第2期120-126,共7页Journal of Forest and Environment

基　　金：“十四五”国家重点研发计划"杉木高产优质高效新品种选育研究"(2022YFD2200201);浙江省"十四五"林木新品种选育"高碳汇优质用材树种新品种选育"(2021C02070-8)。

摘　　要：为揭示杉木高世代杂交子代生长与材性性状的遗传效应,选择优良的杂交组合,利用设置在浙江省开化县林场的4×5双因素交叉设计的杉木高世代杂交子代测定林,研究8年生杉木的生长性状、木材基本密度和树干碳含量,估算各性状一般配合力(GCA)/特殊配合力(SCA)效应值及相对重要性,分析遗传控制方式及性状间的相关性。结果表明:杉木树高、胸径、单株材积、木材基本密度、树干碳含量在杂交组合间均差异显著(P<0.05),含碳率在组合间差异不显著。父母本配合力分析显示,树高、胸径、单株材积、树干碳含量的母本效应均大于父本效应,C25-3母本效应最大,B109-3父本效应最大;杂交组合各性状均以加性基因效应控制为主,杉木高世代育种工作仍需注重亲本的选配。性状间相关性分析表明,树干碳含量与生长性状呈显著正相关,按10%的入选率,联合选择出3211和3215两个速生高固碳的杂交组合,单株材积较对照(CK)增加30.91%以上,树干碳含量较CK增加26.95%以上,而木材基本密度与生长性状呈弱相关或负相关,筛选出3218和3216两个木材性状优良的杂交组合,木材基本密度较CK增加2.17%以上。We used a 4×5 two-factor crossover design of fir advanced generation hybrid progeny in a forest farm in Kaihua County,Zhejiang Province,to study the growth traits,basic wood density,and trunk carbon content of 8 years old fir to estimate the general combining ability and special combining ability(GCA/SCA)effect values and relative importance of each trait,analyze the genetic control mode and correlation between traits,reveal the genetic effects of growth and timber traits in fir advanced generation hybrid progeny,and select high-performing hybrid combinations.We estimated the GCA/SCA effect values and relative importance of each trait and analyzed the genetic control mode and correlation between the traits.The results showed that the differences in height,diameter at breast height,volume of wood per plant,basic density of wood,and carbon content of the trunk of cedar trees were significant(P<0.05)among the hybrid combinations,while the differences in carbon content were not significant among the combinations.Parent-parent fitness analysis showed that the maternal effects of tree height,diameter at breast height,volume of wood per plant,and trunk carbon content were greater than the paternal effects,with C25-3 having the greatest maternal effect and B109-3 having the greatest paternal effect.The hybrid combinations were mainly controlled by the effects of additive genes for each trait,and focusing on the selection of the parents for breeding tall fir tree generations is vital.Correlation analysis between traits showed that trunk carbon content and growth traits were significantly positively correlated.and two fast-growing and high carbon sequestration hybrid combinations(3211 and 3215)were jointly selected based on the 10%selection rate.The volume of wood per plant increased by>30.91%compared with that of control check(CK),and the carbon content of the trunk increased by>26.95%compared with that of CK,whereas the basic density of wood was weakly correlated or negatively correlated with the growth traits.Two hybri

关 键 词：杉木 遗传力 配合力 生长性状 木材基本密度 

分 类 号：S791.27[农业科学—林木遗传育种]