福建柏优树子代测定及初步选择

Progeny testing of plus trees and selection of Fokienia hodginsii

对福建省永安国有林场5年生80株福建柏Fokienia hodginsii优树子代测定林进行测定与分析。结果表明,不同家系在树高、胸径和材积等指标上差异达到极显著水平,这些差异主要由家系遗传特性决定。以材积为主要选择指标,兼顾树高、胸径和通直度指标,从参试子代测定林中选出J007和N001等13个优良家系,其5年生平均树高、胸径和材积分别为4.05m,5.57cm和0.00594m3,平均遗传增益分别为9.36%,16.46%和33.77%;选出Di001和Di002等35个优良个体,平均树高、胸径和材积分别为4.65m,7.5cm和0.01066m3,遗传增益分别为24.19%,42.17%和146.93%。这些优良家系、优良个体表现出明显的生长优势,可用作种子园建园材料和无性繁殖材料。

In order to chose plus trees of Fokienia hodginsii to utilization, mensuration and analysis were conducted on 80 families of Fokienia hodginsii from 5-year-old progeny in the National Forest Farm of Yongan, Fujian Province, in 2005. We used balanced lattice square method with 10 replications. Results showed significant differences （P〈0.01） among families for tree height, diameter at breast height （DBH）, and stem volume which were mainly controlled by genetic factors. According to progeny tests and based on stem volume while considering tree height, DBH, and straightness, thirteen superior families （J007, NO01 etc.） and 35 superior individuals（Di001, Di002 etc.） were preliminarily selected. For 13 superior families, average tree height was 4.05 m with a 9.36% average genetic gain, average DBH was 5.57 cm and 16.46%, and average stem volume was 0.005 94 m^3 and 33.77%. For the 35 superior individuals, average tree height was 4.65 m with 24.19% average genetic gain, average DBH was 7.5 cm and 42.17%, and average stem volume was 0.010 66 m^3 and 146.93%. These superior families and individuals showed favorable growth traits and could be used for seed orchard or vegetative propagation.