论文部分内容阅读
对火炬松 30个自由授粉家系 8个年度 (1～ 2 ,4～ 8,1 3年生 )的生长数据进行相关分析 ,结果表明 ,2 ,4～ 8年生生长量与 1 3年生生长量存在着显著或极显著的表型相关 ,年度性状间的遗传相关系数均大于相应的表型相关系数。早期选择可在 4年生依家系的胸径生长量进行 ,或在 2年生依家系的树高生长量作低强度选优 ,以指导从初级种子园采集优系种子及再选择建立改良种子园
The correlation analysis of the growth data of 30 free pollinated families of Pinus taeda in eight years (1-2, 4-8, and 13-year-olds) showed that there were significant differences between the annual growth of 2-4 years and the annual growth of 13 years Significant or extremely significant phenotypic correlation, genetic correlation coefficient between the annual traits were greater than the corresponding phenotypic correlation coefficient. The early selection can be carried out according to the DBH growth rate of 4-year-olds or the 2-year growth rate of tree height according to the family tree to guide the selection of excellent seed from the primary seed orchard and re-select the establishment of improved seed orchard