粉色果实花楸母本起源的分子证据  

Molecular Evidence for Maternal Origin of Sorbus with Pink Fruits

作　　者：汤薇[1] 于雪丹[1] 张川红[1] 叶学敏[1] 付其迪 郑勇奇[1] TANG Wei YU Xue-dan ZHANG Chuan-hong YE Xue-min FU qi-di ZHENG Yong-qi(Research Institute of Forestry, Chinese Academy of Forestry, Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Beijing 100091, China)

机构地区：[1]中国林业科学研究院林业研究所,国家林业局林木培育重点实验室,北京100091

出　　处：《林业科学研究》2016年第6期834-838,共5页Forest Research

基　　金：国家科技支撑计划课题“林木种质资源发掘与创新利用”(2013BAD01B06)

摘　　要：[目的]探讨河北驼梁山自然风景区内形态介于花楸树和北京花楸之间的粉色果实花楸的起源。[方法]本研究调查了花楸树、北京花楸和粉色果实花楸的海拔分布格局及生长状况,并通过叶绿体DNA序列分析3个类群的系统发育关系。[结果]北京花楸主要分布在海拔1 300 2 000 m,花楸树分布于1 500 2 200 m,粉果花楸出现在两者重叠分布区内;粉果花楸叶绿体单倍型有70%与北京花楸相同,10%与花楸树相同,其余20%为其特有。[结论]表明:粉色果实花楸是花楸树和北京花楸之间的天然杂交种,是多起源的类群,在自然分类系统中应作为独立的种来处理;花楸树和北京花楸均可作为母本。[Objective]To explore the origin of Sorbus individuals with striking pink fruits,morphologically intermediated between Sorbus pohuashanensis and S. discolor in Mount Tuoliang,Hebei province. [Methods]The altitude distribution and growth state of S. pohuashanensis,S. discolor and Sorbus individuals with pink fruits were investigated and the phylogeny relationships of the these Sorbus species were analyzed by chloroplast DNA sequence. [Results]Most S. discolor are distributed at the elevation from 1 300 2 000 m. The majority of S. pohuashanensis distributes at an altitude from 1 500 to 2 200 m. The individuals with pink fruits appear in their sympathy area.70% haplotype of individuals with pink fruits shared with S. discolor and 10% with S. pohuashanensis,the other is the specific. [Conclusion]The Sorbus individuals with pink fruits originate from interspecific hybridization between S. pohuashanensis and S. discolor,it is also inferred that they have multiple origins and might belong to a new species in natural taxa system. S. pohuashanensis or S. discolor may serve as maternal parent of individuals with striking pink fruits.

关 键 词：花楸 叶绿体非编码区序列 单倍型 母本起源 

分 类 号：S718.46[农业科学—林学]