A phylogenetic and biogeographic study of Hamamelis (Hamamelidaceae), an eastern Asian and eastern North American disjunct genus
A phylogenetic and biogeographic study of Hamamelis (Hamamelidaceae), an eastern Asian and eastern North American disjunct genus
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DOI：
10.1016/s0305-1978(98)00067-2
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发表时间：
1999-01-01
影响因子：
1.6
通讯作者：
Shi, SH
中科院分区：
文献类型：
--
作者：
Wen, J;Shi, SH
金缕梅科金缕梅科金缕梅属植物由4~6种组成，分散分布于东亚和北美东部。利用核糖体DNA的内部转录间隔区(ITS)区域的序列进行系统发育分析。金缕梅的北美种形成了一个单系群。先前提出的东亚日本血吸虫与北美东部血吸虫之间的亲缘关系没有得到ITS系统发育的支持。据报道，大多数东亚和北美东部的分离属之间没有直接的洲际姊妹种关系，这表明分离模式相对古老。化石证据支持白令大陆桥假说，作为哈马梅利斯分离模式形成的解释。来自美国东南部的大叶海棠和来自墨西哥的墨西哥海棠与来自欧扎克高原的海南海棠具有相同的分布特征，但与海南海棠不同，这表明需要对其进行分类复查。(C)1998爱思唯尔科学有限公司。保留所有权利。
Hamamelis (Hamamelidaceae) consists of four to six species disjunctly distributed in eastern Asia and eastern North America. Phylogenetic analyses were conducted using sequences of the internal transcribed spacer (ITS) regions of the nuclear ribosomal DNA. The North American species of Hamamelis formed a monophyletic group. The previously proposed close relationship between the eastern Asian H. japonica and the eastern North American H. vernalis was not supported by the ITS phylogeny. The lack of direct intercontinental sister species relationship was reported from most other eastern Asian and eastern North American disjunct genera, suggesting the relative antiquity of the disjunct pattern. Fossil evidence supported the Bering land bridge hypothesis as the explanation for the formation of the disjunct pattern in Hamamelis. Although generally treated under the synonymy of H. virginiana, H. macrophylla from southeastern US and H. mexicana from Mexico had an identical ITS profile with H. vernalis from the Ozark Plateau, but distinct from H. virginiana, suggesting the need for a taxonomic reexamination. (C) 1998 Elsevier Science Ltd. All rights reserved.