Phylogenetic and biogeographic diversification of Berberidaceae in the northern hemisphere
Phylogenetic and biogeographic diversification of Berberidaceae in the northern hemisphere
复制标题
北半球小檗科的系统发育和生物地理多样性
DOI：
10.1600/036364407783390791
复制
发表时间：
2007-10-01
影响因子：
1
通讯作者：
Li, Jian-Hua
中科院分区：
文献类型：
--
作者：
Wang, Wei;Chen, Zhi-Duan;Li, Jian-Hua
利用叶绿体基因matK、rbcL和核糖体ITS2序列对小檗科植物进行系统发育分析。三个主要分支被识别出来，分别对应于染色体碱基数x = 6,7和8/10。Bongardia是包含Achlys和podophyum组的分支的姐妹，后者由双叶门，中国足叶门，足叶门和Dysosma组成。欧亚大陆和北美之间6个分离属的分化时间估计在7.5 +/- 2.3 Ma到1.0 +/- 0.7 Ma之间。小檗科的洲际分离谱系可能起源于东亚，然后迁移到欧洲和北美。然而，远距离的扩散可能解释了阿克里斯的分布模式。西南亚小檗科荒漠旱生植物的起源是对不同时期干旱气候的响应；Bongardia在46.5 +/- 3.6 Ma时与裸子种分化，而Leontice在10.3 +/- 3.2 Ma时与裸子种分化。
Sequences of the chloroplast genes matK and rbcL and nuclear ribosomal ITS2 were used for phylogenetic analyses of Berberidaceae. Three major clades were recognized, corresponding to the chromosome base numbers x = 6, 7, and 8/10. Bongardia was sister to the clade containing Achlys and the Podophyllum group, which consists of Diphylleia, Sinopodophyllum, Podophyllum, and Dysosma. The estimated times of divergence of six disjunct genera between Eurasia and North America ranged from 7.5 +/- 2.3 Ma to 1.0 +/- 0.7 Ma. The intercontinental disjunct lineages of Berberidaceae may have originated in eastern Asia and then migrated to Europe and North America. However, long-distance dispersal may explain the distribution pattern of Achlys. Desert xerophytes of Berberidaceae in southwestern Asia originated in response to the advent of dry climate at different times; Bongardia diverged from its closest relatives at 46.5 +/- 3.6 Ma, whereas Leontice differentiated from Gymnospermium at 10.3 +/- 3.2 Ma.