中山大学学报（自然科学版）Issue(1)：16-23,8.DOI:10.13471/j.cnki.acta.snus.2016.01.003
珍稀植物海南草海桐基于 ITS 序列分析的系统位置研究
Systematic position of a rare plant species Scaevola hainanensis based on ITS sequence analysis
摘要
Abstract
Genetic diversity of Scaevola hainanensis Hance is estimated based on the sequences of nucle-ar ribosomal internal transcribed spacer region (ITS)from five populations distributed in China.Further, phylogenetic analysis of the S.hainanensis is performed based on combined ITS sequences data with other species of Scaevola and outgroups available from GenBank.The results shows that the genetic diversity of S.hainanensis is very low,implying that it is at risk of extinction at the genetic level as a rare plant.In the phylogenetic tree,S.hainanensis is located in the Northern Hemisphere lineage and closest to the clade consisting of local species in Hawaii with high support value,which imply the progenitor-derivative dispersal pattern of Scaevola species between Asia and Hawaii.The results did not support the monophyly of S.sect Scaevola and the hypothesis that S.hainanensis is derived from a widespread and sympatric species S.taccada is rejected based on the present result.关键词
海南草海桐 Scaevola hainanensis Hance/ITS/系统发育分析Key words
Scaevola hainanesis Hance/ITS/phylogenetic analysis分类
农业科技引用本文复制引用
粟米,何思宁,李炜曦,王舒,谈凤笑,黄椰林..珍稀植物海南草海桐基于 ITS 序列分析的系统位置研究[J].中山大学学报（自然科学版）,2016,(1):16-23,8.基金项目
国家自然科学基金资助项目 （）
