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Taxonomy and genetic diversity of domesticated Capsicum species in the Andean region

机译：安第斯地区驯化辣椒属物种的分类学和遗传多样性

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摘要

The Capsicum genus is native to tropical America and consists of 27 species, five of which are used as fresh vegetables and spices: Capsicum annuum L., Capsicum chinense Jacq., Capsicum frutescens L., Capsicum baccatum L. and Capsicum pubescens R. et P. The study of the relationships among species of cultivate Capsicum species will be useful for breeding new cultivars or hybrids. This study is focused on the genetic diversity and relationships of these species that were collected in the Andean region. Ten microsatellites and four AFLP combinations were used to characterize 260 Capsicum accessions. The AFLP tree turned out to be informative regarding relationships among species. The data clearly showed the close relationships between C. chinense and C. frutescens. Moreover, C. cardenasii and C. eximium were indistinguishable as a single, morphologically variable species. Our data showed C. baccatum and C. praetermissum to be distinct species that form a compact group. In the present work, AFLP fingerprinting indicated that C. chacoense was placed in the C. baccatum complex and showed C. tovarii as a separate species. In addition, SSR data indicated that there is intraspecific differentiation in the species C. chinense, C. baccatum and C. pubescens, as the PCoA-based clustering showed a clear geographic division related to country. Even though Bolivia is considered to be the nuclear area for these species, we have found similar variability in Ecuador and Peru for several Capsicum species.
机译：辣椒属属原产于美国热带地区，由27种组成，其中有5种用作新鲜蔬菜和香料：辣椒辣椒，辣椒辣椒，辣椒辣椒，巴氏辣椒和辣椒pubescens R.等。 P.对辣椒栽培种之间的关系的研究将有助于育种新品种或杂种。这项研究的重点是在安第斯地区收集的这些物种的遗传多样性和相互关系。十个微卫星和四个AFLP组合用于表征260个辣椒品种。事实证明，AFLP树可提供有关物种之间关系的信息。数据清楚地表明了中华梭菌和欧洲梭状芽胞杆菌之间的密切关系。此外，C。cardenasii和C. eximium作为单一的形态学可变的物种是无法区分的。我们的数据显示，巴氏梭状芽胞杆菌和古兰角梭菌是形成紧密群的不同物种。在目前的工作中，AFLP指纹图谱显示C. chacoense被放置在B. baccatum复合物中，并显示了C. tovarii是一个单独的物种。此外，SSR数据表明，由于基于PCoA的聚类显示出与国家相关的明确地理划分，因此在C. chinense，C。baccatum和C. pubescens种中存在种内差异。尽管玻利维亚被认为是这些物种的核区，但我们发现厄瓜多尔和秘鲁的几种辣椒具有类似的变异性。

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