马尾松种子园建园亲本性状遗传变异及优质速生无性系选育

The genetic variation of parent characteristics and clonal selection of high quality and fast growth in the seed orchard of Pinus massoniana

通过对11年生马尾松种子园无性系木材基本密度测定和11年生种子园自由授粉子代生长性状测定,结果表明:无性系间木材基本密度的差异,家系间树高、胸径、单株材积生长量的差异均达到极显著水平,具有较高的重复力(遗传力)。所评选出10个优质速生无性系的木材基本密度、子代的平均树高、胸径、单株材积分别为0.5443 g.cm-3、11.80 m、14.93cm、0.1011 m3,与群体平均值相比的遗传增益分别为8.7%、1.8%、3.6%、8.4%,在生产上具有良好的推广应用前景。

Based on the determination of the clone timber basic density and the growth characters of open-pollinated progenies in 11- year-old Pinus massoniana seed orchard, the results indicated that there were great significant difference between clones in basic density and between families in tree height, DBH and individual volume increment, respectively, which showed high heritability. The 10 selected clones with high quality and fast growth had basic timber density 0. 5443 g·cm^-3, average tree height of its progenies 11.80 m, average DBH of its progenies 14.93 m and individual volume of its progenies 0. 1011 m^3. Compared with the population average value, their genetic gains were 8.7 %, 1.8 %, 3.6 % and 8.4 %, respectively. These clones have good extension prospect in forestry product.