CAJ | 학술논문

通过线粒体matR基因序列分析探讨了山茶科的分类学范围和系统演化关系.结果显示,传统山茶科的两个核心--山茶亚科(Theoideae或Camellioideae)和厚皮香亚科(Ternstroemioideae)不构成姐妹群关系,山茶亚科是一个支持率很高的单系类群,厚皮香亚科没有形成单系;山茶亚科下可区分出3个明显的分支,基部的分支由紫茎属(Stewartia)和舟柄茶属(Hartia)组成,木荷属(Schima)、美洲荷属(Franklinia)和美国大头茶属(Gordonia)构成第2个分支,该分支与由山茶属(Camellia)、核果茶属(Pyrenaria)、多瓣核果茶属(Parapyrenaria)、石笔木属(Tutcheria)、大头茶属(Polyspora)和圆籽荷属(Aptersperma)组成的第3个分支互为姐妹群.研究结果很好地支持了Prince和Parks等学者提出的的狭义山茶科(仅含山茶亚科)和狭义大头茶属的概念以及科下3个族(紫茎族Stewartieae、大头茶族Gordonieae和山茶族Theeae)的划分.但本研究更为清晰地揭示了科下3个族间的系统关系,即紫茎族是最基部的分支,山茶族与大头茶族间有更近的亲缘关系.同时,本文认为,厚皮香(亚)科是否为单系类群值得进一步研究.
통과선립체matR기인서렬분석탐토료산다과적분류학범위화계통연화관계.결과현시,전통산다과적량개핵심--산다아과(Theoideae혹Camellioideae)화후피향아과(Ternstroemioideae)불구성저매군관계,산다아과시일개지지솔흔고적단계류군,후피향아과몰유형성단계;산다아과하가구분출3개명현적분지,기부적분지유자경속(Stewartia)화주병다속(Hartia)조성,목하속(Schima)、미주하속(Franklinia)화미국대두다속(Gordonia)구성제2개분지,해분지여유산다속(Camellia)、핵과다속(Pyrenaria)、다판핵과다속(Parapyrenaria)、석필목속(Tutcheria)、대두다속(Polyspora)화원자하속(Aptersperma)조성적제3개분지호위저매군.연구결과흔호지지지료Prince화Parks등학자제출적적협의산다과(부함산다아과)화협의대두다속적개념이급과하3개족(자경족Stewartieae、대두다족Gordonieae화산다족Theeae)적화분.단본연구경위청석지게시료과하3개족간적계통관계,즉자경족시최기부적분지,산다족여대두다족간유경근적친연관계.동시,본문인위,후피향(아)과시부위단계류군치득진일보연구.
The circumscription and phylogenetic relationships of Theaceae was investigated using mitochondrial matR sequences data.Phylogenetic analyses based on the matR data,strongly support a monophyletic Theoideae (or Camellioideae) containing three well-supported lineages (Stewartieae,Gordonieae and Theeae),but do not support the sister relationship of Theoideae and Ternstroemioideae,suggesting a paraphyletic Ternstroemioideae.These results are consistent with some recent authors recognizing Theaceae sensu stricto (s.s.) to the exclusion of Ternstroemioideae,and give further support for the three-tribe classification system of Theaceae s.s.of Prince and Parks in 2001.On the other hand,the matR-based analyses provide a better resolution of the phylogeny within Theaceae s.s.,i.e.,Stewartieae is the basalmost lineage in Theaceae,and Theeae and Gordonieae are closely related with weak support (bootstrap=64%).