福建柏地理种源湖南试点幼林期结果初报

研究表明,福建柏17个地理种源和48个家系幼林期树高、胸径、材积生长在山区、半山区、丘陵区均有极显著差异,其树高、胸径、材积遗传力值分别达0.556 1～0.9034、0.630 3～0.914 0、0.670 1～0.914 3,反映该差异主要受遗传因素影响.种源×地点交互作用显著,其3个主要性状生长量山区＞半山区＞丘陵区.根据材积遗传增益大于种源平均值15%以上的选择标准,初步选择出适宜不同生态环境造林地的10个优良种源和14个家系,其材积遗传增益分别为16.09%～88.70%、15.19%～184.80%.

Result on Geographical Provenance Trial at Young Fokienia hodginsii Stand in Hunan

The heredity variability of the height, diameter and volume growth, interaction effect between biomass and circumstance, relativity among characters, age and seedling growth of a 4 ~5 years old forest in 17 geographical provenances and 48 families in Hunan were studied. The results indicated there were obvious differences in the height, diameter and volume growth at mountainous, semi-mountainous and hilly areas. Heritabilities of the height, diameter and volume were 0. 556 1 - 0.903 4, 0.630 3 - 0.914 0, 0.670 1 - 0.914 3 respectively. For the interaction of provenances and environment , the rank of the height, diameter and volume growth was mountainous area > semi-mountainous area > hilly area. Based on the selection standard on the volume growth exceeded (15%) of average provenances, 10 superior provenances and 14 families were tentatively selected with the genetic gain of 16. 09% - 88. 70% , 15. 19% - 184. 80% respectively and could be afforested in different ecological environments.