1. College of Foresty,Northeast Forestry University,Harbin 150040,China
2. Poplar Research Institute of Liaoning Province,Gaizhou 115200,Chian
3. Forestry Headquarter of Tiefa Coal Industry (Group) Limited Liability Company,Dangpu Tun Forestry Field,Tieling 112000,China
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文章历史+
Received
Accepted
Published
2024-10-31
Issue Date
2025-05-19
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摘要
通过对引种的哈萨克斯坦桦树开展多点区域试验,分析其适应性,筛选出优良家系,为引种桦树家系的选择和应用提供理论依据。以定植在黑龙江省大庆市、黑龙江省尚志市及辽宁省锦州市11年生23个哈萨克斯坦桦树家系及2个帽儿山种源的中国白桦家系为研究对象,分析其树高、胸径、材积和通直度等性状的遗传变异规律,采用R语言ASReml4.0软件包,拟合具有异质方差的混合线性模型,通过最佳线性无偏预测法(best linear unbiased prediction,BLUP)获得不同试验地点各家系的育种值,并结合GGE (Genotype main effects and genotype × environment interaction)双标图对各参试点和家系进行综合评价及选择。在以地点为固定效应的混合效应模型中,发现地点间环境影响显著,生长性状在不同地点间及同一试验地点内家系间均达到显著差异(P<0.05,方差分量估计值与其标准误差的比值(Z ratio)大于1.5);大庆试验点中17号家系的保存率和育种值最高,具有较好的耐盐性;基于BLUP法的GGE双标图显示,引种桦树3号家系速生性最优,9号家系稳定性最强。基于各家系稳定性及速生性综合排序,按照30%入选率,并结合各家系材积遗传增益,选出20号、9号、7号、24号共4个优良家系。
1.2.4 GGE(Genotype main effects and genotype×environment interaction)双标图
基于不同地点的综合育种值数据,运用R语言中的GGEBiplotGUI软件包绘制出不同试验地点和家系的GGE双标图。在进行参数设置时,将Scaled选项设为0(表示非标准化),将Centered选项设为G+GE,并根据图形类型将特征值选项(singular value partitioning,SVP)设为1或2[22]。
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