关键词: 香椿, 家系, 生长差异性, 评价

Abstract: An afforestation experiment of Toona sinensis containing 70 families from 12 provenances was conducted in Yongchun and Hua’an, Fujian Province. The investigation on two-year-old T. sinensis superior progeny test forest was carried. The results showed that the height and ground diameter of the progeny of 2-year-old T. sinensis in Hua’an were 1.10—2.80 m and 1.24—3.72 cm, respectively, and the height and ground diameter of the progeny of 2-year-old T. sinensis in Yongchun were 0.91—2.71 m and 1.18—3.68 cm, respectively. The difference of tree height and ground diameter between different Chinese toon families in Hua’an and Yongchun experimental sites reached a very significant level (P<0.01). The variation coefficients of tree height and ground diameter at Hua’an test site were 20.22% and 23.68%, respectively. Six families with excellent early growth performance were preliminarily selected, and their average tree height and ground diameter were 2.55 m and 3.44 cm, respectively. The average genetic gains were 23.70% and 30.16%, respectively. The variation coefficients of tree height and ground diameter at Yongchun test site were 26.44% and 26.48%, respectively. Nineteen families with excellent early growth performance were preliminarily selected. The average tree height and ground diameter were 2.52 m and 3.34 cm, respectively. The average genetic gains were 25.07% and 24.96%, respectively. Based on cluster analysis and growth comparison of height and ground diameter of superior progenies of T. sinensis, 70 families were divided into five categories: superior, superior, medium, inferior and extreme. Based on the growth performance of two experimental sites, four families, No. 4, No. 23, No. 53 and No. 65, were preliminarily identified as excellent families.

Key words: Toona sinensis, family, growth difference, preliminary evaluation