在中国鹅掌楸全分布区内抽样 15个种源 ,于长江中下游 5省区按统一试验设计营造种源试验林。 7年生时全面测定其树高 ( H)、胸径 ( DBH)、冠幅 ( RC)等主要生长性状 ,进行遗传变异分析。结果表明 :中国鹅掌楸生长性状在种源间存在显著的遗传差异。地点间差异极显著 ,种源对环境反映灵敏 ,种源与地点间存在明显的交互作用。H、DBH和材积 ( V)的广义遗传力分别为 0 .50 3、0 .52 6、0 .52 1,受较强的遗传控制 ;RC受遗传控制程度相对较低 ( H2 =0 .30 1)。相继进行了遗传稳定性、生长适应性分析和幼成龄相关分析 ,分析结果为种源选择和评价提供了理论依据。多点综合选择选出黎平、叙永两个优良种源 ,遗传增益 11.8%。单点选择分别选出 1～ 3个丰产种源 ,遗传增益达 15.4 %～ 51.5%。 Fifteen provenances were sampled from the full distribution area of ​​Liriodendron chinense, and a provenance trial plantation was designed according to the uniform design in 5 provinces in the middle and lower reaches of the Yangtze River. The major growth traits such as tree height (H), DBH (diameter at breast height) and crown width (RC) were measured comprehensively at 7 years of age, and genetic variation analysis was carried out. The results showed that there were significant genetic differences among the provenances of Liriodendron chinense. There were significant differences among the locations, the provenance was sensitive to the environment, and there was a significant interaction between provenances and sites. The general heritabilities of H, DBH and volume (V) were 0.50 3,0. 52 6,0. 52 1, respectively, which were controlled by strong genetic control. The genetic control of RC was relatively low (H2 = 0.30 1). Successive genetic stability, growth adaptability and juvenile age-related analysis, the results provide a theoretical basis for the selection and evaluation of provenances. Multi-point comprehensive selection of Liping, Syria Yong two elite provenance, genetic gain 11.8%. Single point selection were selected 1 to 3 high yield provenance, genetic gain of 15.4% ~ 51.5%.