杉木二代家系区域选择头.PDFVIP

第 23 卷第 1 期 南 京 林业大 学学 报 Vol. 23 No.l 1999 年 1 月 ]ournal of Nanjing Forestry Uni versity ]an. 1999 杉木二代家系区域选择头 金 王 (安徽省休宁县林业局 黄山 245400) 摘 要 我国第一批杉木二代家系区域试验黄山试点 39 个家系幼林阶段的调查分析表明， 二 代家系具较高生产力水平，但家系间差异显著， 在二代家系中再选择、推广，仍具有较大的增产 潜力，其中 16 个家系树高、胸径、材积的遗传增益期望值分别达 6.22 % ~ 11. 43 %、 8. 86% ~ 25.36%和 21. 43% ~53. 76% ，家系间生长量与抗雪压倒伏能力极显著相关，为杉木生长性状 与抗雪压能力开展联合选择提供了可能。 关键词 杉木: 二代家系:遗传增益:区域选择 中图分类号 S722 Studies on the Family Selection in Region Tests of the Second- Generation Genetic Improvement of Chinese fir Wang ]infu (Xiunin Forest Bureau An hui Province Huangshan 245400) Abstract The region tests of the second-generation seletions were arranged in the main distribution of Chi nese fir in China in 1992. The results of studies on 39 families of the early stage in the site of Huangshan showed that the families of the second-generation improvement had a good production level , but the differ- ence of growth among families was significant , so re-selection from the families of the second-generation and then generalization would bring g∞d potential of increase of growth. The expected genetic gains of height , dbh and volume of 16 re-selectecl families would be 6.22 % ~ 11.43% , 8.86 % ~25.36 % and 21.43 % ~ 53. 76 % respectively. The correlation between the growth of family and the ability of anti-snow damage was at 0.01 level , so it was possible for the joint selection of growth and anti-snow. Key words Chinese fir; Family of the second-generation; Genetic gains; Regi