摘要
依据苞片是覆瓦状排列或是卷筒状排列而把姜花属Hedychium分为两个亚属的分类法近年颇受质疑。本文利用30对多态性好的随机引物,对中国姜花属的19种1变种共22份材料进行SRAP分子标记分析。其中最有效的28对引物共扩出152条带,当中135条为多态性带,占88.8%。平均每对4.8条,多态性条带里最多的为引物组合F13R1,达到13条。聚类分析表明:(1)中国姜花属植物可分为三个类群:第I群植株较矮小,主要分布于石灰岩地区;第II群与第I群每苞片均具2朵以上的小花,但植株较高大且基本上不分布于石灰岩地区;第III群每苞片仅具1朵小花。此结果与Wood(2000)用ITS分析得出的结果基本一致。(2)支持吴德邻和Larsen(2000)把H.emeienseZ.Y.Zhu归并为峨眉姜花H.flavescens Carey ex Roscoe的观点。(3)盘珠姜花H.panzhuumZ.Y.Zhu与黄姜花H.flavum Roxb.是同一种植物,即盘珠姜花是黄姜花的晚出同名。(4)土壤基质可能是导致姜花属物种分化的重要因素。作者认为根据每苞片有花多少的特征,在系统学上可把姜花属分为两个类群:A类群,每苞片仅有1朵小花;B类群,每苞片有2朵以上的小花。
The traditional taxonomy of Hedychium was based on the bracts arrangement, imbricate or tubular, and this genus was divided into two subgenera. However, that was queried in recent years. The phylogenetic relationship of a total of 22 samples representing 19 species and 1 variety of Hedychium was investigated using SRAP technique. SRAP analysis produced 152 bands by using the 28 most informative primer pairs, 135 （88.8%） of which were polymorphic. Clustering analysis indicated that： （1） Hedychium from China can be divided into three groups. Plants in group I are short and distributed in limestone. Plants in group II are tall and seldom distributed in limestone. Plants in group III are with only one flower per bract, while plants in other two groups are with two or more flowers per bract. This result supports Wood＇s subdivision based on internal transcribed spacer sequence. （2） Wu＇s treatment by reducing H. emeiense Z. Y. Zhu to be a synonym ofH. flavescens is supported. （3） H. flavum Roxb. and H. panzhuum Z. Y. Zhu are shown to be the same species, and H. panzhuum is reduced to be a synonym of H. flavum （4） The edaphic conditions are believed to be very important for the adaptation and evolution of Hedychium. In this paper, it is suggested that Hedychium be divided into two groups according to the number of flowers per bract.
出处
《植物分类学报》
CSCD
北大核心
2008年第6期899-905,共7页
Acta Phytotaxonomica Sinica
