森林与环境学报2024，Vol.44Issue(5)：476-483,8.DOI:10.13324/j.cnki.jfcf.2024.05.004
杉木单交F1代的表型变异及杂种优势分析
Analysis of F1 representative variation and heterosis of Chinese fir
摘要
Abstract
For targeted variation creation in Chinese fir and selection of superior individuals within families,this study targeted the 6421 by 27 elite crosses and their 6-year F1 progeny from a single cross.Variation analysis was conducted on phenotypic values for 12 traits indicative of morphology,growth,and wood properties to explore phenotypic variation behaviors and inter-trait relationships in superior Chinese fir germplasm.Results revealed variation coefficients for the 12 traits in the F1 population from 8.21%to 37.97%,with five traits exceeding 15%.Among 66 trait correlations,36.36%showed moderate positive relationships.Basic wood density displayed a coefficient of variation of 8.21%,correlating non-significantly with the other 11 traits.In total,131 F1 offsprings displaying mid-parental heterosis in both directions,presented eight traits exhibiting dominant effects,and heterosis rates ranging from-31.18%to 90.44%,notably with first-order lateral branch number showing significant over-dominance.Cluster analysis divided the 131 F1 offsprings into three major and six sub-clusters,each with precise characteristics.F1 hybrids of Chinese fir showed substantial variation in growth and branching traits,with dense and broad-crowned firs having a pronounced growth advantage in the early stages.First-order lateral branch numbers in Chinese fir demonstrated apparent hybrid vigor,and their morphological traits showed dominant inheritance.关键词
杉木/单交子代/表型变异/杂种优势/遗传效应/聚类分析Key words
Chinese fir/single-crossed offspring/phenotypic variation/hybrid vigor/genetic effect/cluster analysis分类
农业科技引用本文复制引用
万柯慧,徐德志,边黎明,张龙,陈志强..杉木单交F1代的表型变异及杂种优势分析[J].森林与环境学报,2024,44(5):476-483,8.基金项目
"十四五"国家重点研发计划课题"杉木高产优质高效新品种选育研究"(2022YFD2200201) （2022YFD2200201）
国家自然科学基金面上项目"杉木4个连续世代育种群体的变异模式与基因组选择信号研究"(32171818). （32171818）
