高产脂马尾松半同胞、全同胞子代产脂力测定

Determination of Rosin-producing Capacity of Half and Whole Compatriot Progeny of High Rosin-producing Pinus massoniana Varieties

对高产脂马尾松半同胞、全同胞子代产脂力测定结果表明:7年生16个半同胞子代的产脂力,各家系总平均数为9.67 g/10 cm,大于总平均数的有8个家系;21个半同胞子代产脂力的平均遗传力为78.21%,遗传增益为61.46%,属中等水平.4个7年生全同胞子代产脂力,1株(杂交组合43×16人工授粉)为24.1 g/10 cm,其余都在10 g/10 cm以上.说明全同胞子代的产脂力比半同胞子代更为优越.

Rosin - producing capacity of both the half and the whole compatriot progenies of high rosin - producing varieties of Pinus massoniana was determined. It was showed by the determination that the average rosin - producing capacity of 16 families of 7 - year - old half - compatriot progenies was 9.67 g/10 cm, among which the capacity of 8 families was above the average. The average heritability of rosin - producing capacity of 21 half - compatriot progenies was 78.21%, and the genetic gain was 61.46%, belonging to intermediate level. Among the 4 families of 7 - year- old whole- compatriot progenies, one （cross combination 43 × 16 by artificial pollination） had 24.1 g/10 cm of rosin - producing capacity, and the rosin-producing capacity of the rest three whole- compatriot progenies surpassed 10 g/10 cm, indicating that the rosin - producing capacity of whole - compatriot progenies was generally superior to that of the half- compatriot ones.