【摘要】 测定和分析了金缕梅科（Ｈａｍａｍｅｌｉｄａｃｅａｅ）壳菜果亚科等各亚科代表属的核糖体ＤＮＡＩＴＳ区和５８Ｓ编码区序列．应用最大简约法构建的分子系统树表明：壳菜果亚科（Ｍｙｔｉｌａｒｉｏｉｄｅａｅ）植物形成１个单系类群［含壳菜果属（Ｍｙｔｉｌａｒｉａ）和山桐材属（Ｃｈｕｎｉａ）］，支持壳菜果亚科作为１个独立的亚科．本研究所得到的ＩＴＳ数据表明马蹄荷亚科（Ｅｘｂｕｃｋｌａｎｄｉｏｉｄｅａｅ）与红花荷亚科（Ｒｈｏｄｏｌｅｉｏｉｄｅａｅ），金缕梅亚科（Ｈａｍａｍｅｌｉｄｉｏｉｄｅａｅ）与双花木亚科（Ｄｉｓａｎｔｈｏｉｄｅａｅ）分别为姐妹群关系（其自展数据支持率各为９５％和５８％）．分子系统树还表明，测得的所有金缕梅科植物形成一单系类群（其自展数据支持率为９９％），枫香亚科（Ｌｉｑｕｉｄａｍｂａｒｏｉｄｅａｅ）为该科最基础的１个分支．这结果与１９９７年所得到的结论相一致．更多还原

【Abstract】 The phylogenetic relationships between Mytilarioideae and the other subfamilies of Hamamelidaceae based on internal transcribed spacers(ITS) and 5 8S coding region of nuclear ribosomal DNA were shown in this study. The monophyly of Mytilarioideae including Mytilaria and Chunia was strongly supported, which suggests that Mytilarioideae is an independent subfamily. The ITS data indicated that there was a sister relationship between Exbucklandioideae and Rhodoleioideae (with 95% bootstrap value supporting), and Hamamelidioideae and Disanthoideae (with 58% bootstrap value supporting) respectively. All taxa of Hamamelidaceae sampled in this study formed a monophletic group and Liquidambar formosana was cladistically basal within the family, which supported the result of our last study in 1997.更多还原