杉木杂交后代胸径生长和木材体积质量的遗传变异及联合选择

Chinese fir:genetic variation and combination selection in DBH growth and wood volume weight for filial generation

研究了 1 0年生杉木杂交后代试验林的胸径生长和木材体积质量的遗传变异规律。结果表明 :杉木胸径和木材体积质量在后代间存在显著差异 ,胸径的遗传变异系数为 7 39% ,而木材的变异系数只有 4 45% ,胸径的广义遗传力为 0 77,木材体积质量的广义遗传力则为 0 86;胸径与木材体积质量的遗传相关表现出中度以上的负相关 ( - 0 60 4 9)。采用简单指数法评选出 4个优良杂交组合 ,胸径遗传增益为 9 1 8% ,而木材体积质量与对照相近。表4参

This study was made in 10 year old Chinese fir plantation of filial generation in Fujian Province.The result shows that there is a great difference in DBH and wood volume weight among filial generations.The genetic variation coefficient of DBH is 7 39%,and wood volume weight is 4 45% only.The broad heritability of DBH is 0 77,and wood volume weight 0 86.There is a negative correlation in heredity between DBH and wood volume weight,and correlation coefficient is -0 604 9.Four superior cross combinations are selected by simple index method.Their genetic gain of DBH is 9 18%,and wood volume weight approximates to the ck(Weimin F 1 seed orchard).