Phylogenetic analyses and chromosome evolution in Convallarieae (Ruscaceae sensu lato), with some taxonomic treatments
Phylogenetic analyses and chromosome evolution in Convallarieae (Ruscaceae sensu lato), with some taxonomic treatments
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DOI：
10.1007/s10265-004-0169-z
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发表时间：
2004-10-01
影响因子：
2.8
通讯作者：
Tamura, MN
中科院分区：
文献类型：
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作者：
Yamashita, J;Tamura, MN
铃兰族（Convallarieae）包括10属95种，最近已从自己的科转移到广义的Ruseaceae。本研究对8属19种植物的trnK和rbcL基因序列进行了分析，并对7属17种植物的染色体形态进行了分析。trnK和rbcL序列的简约性分析表明铃兰族是单系的。虽然早期分支没有得到强有力的引导支持，铃兰属分歧的第一个分支，其次是Speirantha。其余的部落被分成三个分支：一个是Reineckea，第二个是Campylandra和Rohdea，第三个是Tupistra，Tricalistra和Aspidistra。两个单型属，Rohdea和Tricalistra，分别嵌入Campylandra和开口箭属的一个分支。根据中期染色体的基本数目和形态，可将该族分为三种核型：铃兰属（Convallaria）型（x = 19，染色体长度为单峰）、开口箭属（Tupistra）型（x = 19，染色体长度为三峰）和盾叶箭属（Aspidistra-elatior）型（x = 18，染色体长度为三峰）。分子树特征态分布表明铃兰属是近晶型的，由其衍生出开口箭属和盾叶箭属。本文还对Campylandra与万年青、Tricalistra与开口箭进行了分类学处理。
The tribe Convallarieae, comprising 10 genera and 95 species, has recently been transferred from its own family to Ruseaceae sensu lato. In this study, sequence data from trnK and rbcL were analyzed for 19 species in 8 genera, and chromosome morphology was analyzed for 17 species in 7 genera. The parsimony analysis of trnK and rbcL sequences showed that Convallarieae are monophyletic. Although early branches did not receive strong bootstrap support, Convallaria diverged at the first branch, followed by Speirantha. The rest of the tribe was split into three, well-supported clades: one with Reineckea, the second with Campylandra and Rohdea, and the third with Tupistra, Tricalistra, and Aspidistra. Two monotypic genera, Rohdea and Tricalistra, were embedded in a clade of Campylandra and of Tupistra, respectively. Three karyotypes were distinguished in the tribe on the basis of the basic number and morphology of metaphase chromosomes: Convallaria type (with x = 19 and unimodal chromosome length), Tupistra type (with x = 19 and trimodal chromosome length), and Aspidistra-elatior type (with x = 18 and trimodal chromosome length). The character-state distribution in the molecular tree showed that the Convallaria type is plesiomorphic, from which was derived the Tupistra type and subsequently the Aspidistra-elatior type. Taxonomic treatments to transfer Campylandra to Rohdea and Tricalistra to Tupistra are also given.