基于分子证据确认秦岭藤属与驼峰藤属(夹竹桃科)的系统位置

廖 苗<sup>1</sup>; 曾思金<sup>2</sup>; 唐光大<sup>1; 3*</sup>

引用本文:	廖苗, 曾思金, 唐光大.基于分子证据确认秦岭藤属与驼峰藤属(夹竹桃科)的系统位置[J].广西植物,2022,42(10):1717-1729.[点击复制]
	LIAO Miao, ZENG Sijin, TANG Guangda.Confirmation of the systematic positions about Biondia and Merrillanthus(Apocynaceae)based on molecular evidence[J].Guihaia,2022,42(10):1717-1729.[点击复制]

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基于分子证据确认秦岭藤属与驼峰藤属(夹竹桃科)的系统位置
廖苗¹, 曾思金², 唐光大^1,3*
1. 华南农业大学林学与风景园林学院, 广州 510642;2. 中国科学院华南植物园植物资源保护与可持续利用重点实验室广东省数字植物园重点实验室, 广州 510650;3. 韶关学院英东生物与农业学院, 广东韶关 512005

摘要:

秦岭藤属(Biondia Schltr.)是中国特有属,约13种,驼峰藤属(Merrillanthus Chun & Tsiang)是仅在我国与柬埔寨分布的单种属,目前两个属均被归并到白前属(Vincetoxicum Wolf),由于取样和系统发育分析尚存一些欠缺,因此其系统位置和归属尚需进一步确认。该文使用2个核糖体基因序列片段(ITS、ETS)、5个叶绿体基因序列片段(psbA-trnH、trnG、trnL、trnL-F、trnT-L),以及二者的合并数据,重建娃儿藤亚族(Tylophorinae)(包含属的模式秦岭藤 [B. chinensis Schltr.=V. shaanxiense(Schltr.)Meve & Liede]与驼峰藤 [M. hainanensis Chun & Tsiang=V. hainanense(Chun & Tsiang)Meve, H. H. Kong & Liede])的系统发育树。结果表明:秦岭藤属与驼峰藤属均包含在白前属中,秦岭藤与青龙藤 [B. henryi(Warb.)Tsiang & Li=V. henryi(Warb.)Meve & Liede]互为姐妹类群,并与V. kawaroense Meve & Liede聚为一支,而黑水藤 [B. insignis Tsiang=V. insigne(Tsiang)Meve, H. H. Kong & Liede]在另一分支中(亚热带分支Subtropical Clade); 驼峰藤属与V. cissoides(Blume)Kuntze和V. philippicum Meve, Omlor & Liede聚为一支。核糖体和叶绿体基因数据均支持秦岭藤属与驼峰藤属归并入白前属,但秦岭藤属为多系,尚需收集更多种类和数据合并分析,深入探讨归并后白前属的种间系统关系和位置。

关键词: 夹竹桃科, 白前属, 秦岭藤属, 驼峰藤属, 系统发育, 中国

DOI：10.11931/guihaia.gxzw202108036

分类号:Q949.7

文章编号:1000-3142(2022)10-1717-13

基金项目:广东省林业局项目(粤财农 [2019]51; 粤财资环 [2020]130号)[Supported by Project of Guangdong Provincial Forestry Bureau(Guangdong Finance and Agriculture [2019] 51; Guangdong Financial Resources and Environment [2020]130)]。

Confirmation of the systematic positions about Biondia and Merrillanthus(Apocynaceae)based on molecular evidence

LIAO Miao¹, ZENG Sijin², TANG Guangda^1,3*

1. College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, China;2. Key Laboratory of Plant Resources Conservation and Sustainable Utilization &3.Guangdong Provincial Key Laboratory of Digital Botanical Garden, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China;4.3. Henry Fok School of Biology and Agriculture, Shaoguan University, Shaoguan 512005, Guangdong, China

Abstract:

Biondia Schltr., containing about 13 species, is endemic to China, and Merrillanthus Chun & Tsiang is a monotypic genus distributing only in China and Cambodia. These two genera have been included in Vincetoxicum Wolf, but their phylogenetic positions and taxonomic status need further study because of insufficient samples and phylogenetic analysis. We reconstructed the phylogenetic trees of Tylophorinae based on two ribosomal gene sequence data(ITS, ETS)and five chloroplast gene sequence data(psbA-trnH, trnG, trnL, trnL-F, trnT-L)individually and combined data, which contained two types of species samples [including B. chinensis Schltr.=V. shaanxiense(Schltr.)Meve & Liede and M. hainanensis Chun & Tsiang=V. hainanense(Chun & Tsiang)Meve, H. H. Kong & Liede]. The results showed that Biondia and Merrillanthus were nested inside the Vincetoxicum; the type species B. chinensis Schltr.=V. shaanxiense(Schltr.)Meve & Liede were sister to B. henryi(Warb.)Tsiang & Li=V. henryi(Warb.)Meve & Liede, and formed a clade with V. kawaroense Meve & Liede; while B. insignis Tsiang=V. insigne(Tsiang)Meve,H. H. Kong & Liede belonged to the Subtropical Clade; Merrillanthus formed a clade with V. cissoides(Blume)Kuntze and V. philippicum Meve, Omlor & Liede. Our results support that Biondia and Merrillanthus should be included in Vincetoxicum, but Biondia is polyphyletic, more species samples and data need to be collected and analysed to further explore their phylogenetic positions about Vincetoxicum.

Key words: Apocynaceae, Vincetoxicum, Biondia, Merrillanthus, phylogeny, China