淡黄金花茶复合群和薄叶金花茶复合群的遗传结构和谱系地理学研究

山茶属（Camellia）开黄花的种类统称为金花茶植物,它们是非常珍贵的种质资源。金花茶植物的系统分类一直存在争议，现有研究成果表明，金花茶植物存在以淡黄金花茶和薄叶金花茶为代表的两个复合群，前者包括淡黄金花茶、毛籽金花茶、弄岗金花茶等8个种；后者包括薄叶金花茶、龙州金花茶等5个种，对这两个复合群的分类处理存在较大分歧，复合群内的关系仍然有待厘清。本项目拟以这两个金花茶复合群为研究对象，以种群为单位进行采样，采用SSR、AFLP以及DNA序列标记，研究它们的种群遗传结构、种群间基因流以及谱系地理分化，以期阐明复合群内各物种的系统关系和种群遗传结构，研究生境异质性及生境破碎化对它们的影响，为有效保护和科学利用金花茶种质资源提供依据。

Camellia （Theaceae）species with yellow flowers, so called yellow camellias, are very precious germplasm resources. The taxonomical treatment of yellow Camellias has been controversial. There are two complex, Camellia flavida complex encompassed C.flavid,C.longgangensis, C.longgangensis var. gradis, C.ptilosperma, C.longruiensis, C.longengensis var. patens, C.qinqueloculosa, C.multipetala and C.wumingensis, and Camellia chrysanthoides complex encompassed C.chrysanthoides, C.longzhouensis, C.xiashiensis, C.parvipetala and C.micrantha. This project intends to study the genetic structure, gene flow and phylogeography of these two Camellia complexs using SSR, AFLP and DNA sequence marker. The impact of habitat heterogeneity and habitat fragmentation on the genetic differentiation is also explored. It will provide the basis for the effective protection and use of yellow Camellia germplasm Resources.