杉木半同胞家系生产力评价的研究

对 12年生杉木半同胞家系测定林的研究结果表明 ,杉木半同胞家系在树高、胸径、材积生长性状具有丰富的遗传变异 ,受中度遗传控制。利用材积指标作为丰产性测度对杉木半同胞家系的生产力水平进行评价 ,从参试的 10 5个家系中评选出 2 2个材积大于群体平均值 15 %的家系 ,可作为高世代种子园的建园材料 ;7个材积大于群体平均值 2 5 %的家系可作为进一步探讨无性繁殖材料 ,以提高杉木的经营效益

Studies on the Productivity Evaluation of Half-Sib Families of Cunninghamia lanceolata

The study results of 12-year-old half-sib family test plantation of Cunninghamia lanceolata demonstrate that the height,DBH and volume growth characters of half-sib families possess rich genetic variations (under the moderate genetic control).The volume index is used to be the yielding ability measure to evaluate the family productivity level.Among 105 families tested,22 families whose volume increases by 15% over the population average and 7 excellent families whose volume in creases by 25% over the population average have been selected to use for various breeding work so as to raise the management benefit of C.lanceolata.