11年生马尾松种子园自由授粉子代测定林的分析研究

Analysis of the determination plantation of open-pollination progenies from 11-year-old seed orchard of Pinus massoniana

通过对漳平五一国有林场11年生90个家系马尾松种子园自由授粉子代测定林的生长性状调查研究,在对比分析、方差分析基础上判定家系优劣,估算遗传参数与计算遗传增益。结果表明:各家系间树高、胸径、单株材积差异达极显著水平,具有较高的遗传力。11年生时入选的28个优良家系平均树高、平均胸径、平均单株材积分别为11.7 m、15.0 cm、0.0991 m3,遗传增益分别为3.3%、13.4%、31.8%;在优良家系内进行优良单株选择,入选103个单株,平均树高、平均胸径、平均单株材积分别达到12.4 m、17.7 cm、0.1440 m3。遗传增益分别达4.7%、23.9%、69.1%。可显著提高马尾松用材林的产量。

Based on the investigation of the growth status of open-pollination progenies from 90 families of 11-year-old seed orchard of Pinus massoniana in Zhangping Wuyi National Forest Farm, the comparison and variation analysis were applied to determine the family quality, to assess genetic parameters and to calculate genetic gain. The results indicated there was great significant difference among families in tree height, DBH, individual volume, therefore it had higher heritability, of the selected 11-year-old 28 families, the average tree height, average DBH, average individual volume was 11.7 m, 15.0 cm, 0.0991 m^3, respectively, and the genetic gain was 3.3 %, 13.4 %, 31.8 %, respectively. The excellent families were used to select elite trees, 103 individuals, with average height 12.4 m, average DBH 17.7 cm and average individual volume 0.1440 m^3, and the genetic gain was 4.7%, 23.9 % and 69.1%, respectively. This could obviously improve the yield of Pinus rnassoniana timber plantation.