不同地理种源南方红豆杉幼林观赏性状遗传变异初探

收集南方10省25个地理种源，在福建明溪县进行观赏型南方红豆杉地理种源比较试验，2年生幼林的生长结果表明：观赏型南方红豆杉树高、地径、冠幅、一级侧枝数量、冠幅生物量鲜质量、根系生物量鲜质量等指标存在显著性差异，具有较高的广义遗传力和变异系数；根系生物量、冠幅生物量、树高均与其他观赏性状存在显著正相关；地径与冠幅、一级侧枝数量性状之间不存在显著性正相关。

A Preliminary Study on Genetic Variations in Ornamental Traits of Young Taxus chinensis var. mairei Plantation with Varied Geographic Provenances

Based on the collection of 25 geography provenances from 10 provinces in south China, a compara- tive experiment with the geographical provenances of Taxus chinensis var. mairei with landscaping characters was conducted in Mingxi County of Fujian Province. The growth results of the 2 years old young stands showed that there were significant differences in the tree height, basal diameter, crown breadth, number of first cycle of lateral branches, the fresh weight of the above ground biomass, the fresh weight of root biomass and other indices among the provenances. There were high levels of the broad heritability and the genetic variation coefficient among the 6 ornamental traits. The root biomass, the above ground biomass, the plant height were all significantly and positively correlated to the other ornamental characteristics. There was no significantly positive correlation between the basal diameter and the number of first cycle of lateral branches, neither between the crown breadth and the number of first cycle of lateral branch.