马尾松无性系种子园自由授粉子代测定与配合选择

对都匀马尾松无性系种子园48个半同胞家系9年生测定林的胸径、树高、材积进行了测定分析,结果表明:各家系间树高、胸径、材积差异极显著,具有较高的遗传力。从中选择出9个优良家系,其树高、胸径和材积平均为7.12 m、9.84 cm和0.037 97 m3,遗传增益分别为10.44%、7.73%和20.80%。从优良家系内选择46株优良单株,其树高、胸径、材积分别增加了53.81%,56.65%和150.18%、材积预期增益为55.05%。这些优良单株可作为贵州省营建马尾松高世代种子园的备选材料。

Analysis on open-pollination progenies from clonal seed orchard of Pinus massoniana and combination ability selection

A half-sib progeny test was conducted on diameter at breast height(DBH),tree height and stem volume of 48 9-year-old families of Pinus massoniana from Duyun Masson Pine Clonal Seed Orchard.The results indicated there was great significant difference among families in tree height,DBH and volume,the heritability was high.9 families were selected,the average tree height,average DBH,average individual volume was 7.12 m,9.84 cm,0.037 97 m3,and the genetic gain was 10.44%,7.73% and 20.80% respectively.The 46 excellent individuals were selected from the 9 excellent families,the average height,average DBH and average individual volume increased 53.81%,56.65% and 150.18% respectively.The genetic gain of individual volume was 55.05%.They could be used as materials in building seed orchard of high cycle in Guizhou province.