世界各国的日本枫树垂枝型园艺品种资源

简述了世界各国的“日本枫树”垂枝型园艺品种资源概况。指出“日本枫树”是日本槭属植物所有种的泛称。品种选育起始于江户时代，距今已有300余年历史。现有品种数量估计在600个左右，其中垂枝型品种40余个，约占品种总数的7％。西方各国从19世纪20年代开始引种栽培，现有品种数量估计亦在600个左右，其中垂枝型品种90余个，约占品种总数的15．3％。园艺品种主要来自鸡爪枫（Acearpalmatum Thunb．）、大红叶枫（Acer amoenum Carr．）、山红叶枫Acer amoenum var.matsumurae（Koidz．）Makino]等种或变种，绝大多数为实生或枝变选育。“日本枫树”园艺品种广受世界各国爱好者青睐，垂枝型品种更加备受重视。提出了中国开发利用枫树资源途径方法的建议。

Garden Variety Resources of Weeping Type Japanese Maple in the World

Garden variety resources of weeping type of ‘ Japanese maple＇ planted in different countries around the world were summarized. ‘Japanese maple＇ is a general term for all kinds of species in Acer in Japan. Breeding selection dated back to ＂Edo＂ times, about 300 years ago. The existing number of varieties estimated about 600, including weeping type more than 40 and accounting for 7% of all species. The weeping type maple was introduced to western countries since 1820s. The existing number of varieties in western countries was about 600, including weeping type more than 90 and accounting for 15.3% of all species. Garden varieties mainly originated from the species and varieties of Acer palmatum Thunb, Acer amoenUm Carr, Aeer amoenum var. matsumurae （Koidz.） Makino, most of them were seedling selection and branch sport selection. The garden variety ‘ Japanese maple＇ was favored by the lovers from all over the world, especially weeping type variety was received much concern. The suggestions of developing and utilizing maple variety resources in China were proposed.