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首页> 外文期刊>Genetic Resources and Crop Evolution >Analysis of clonal germplasm from five Saccharum species: S. barberi, S. robustum, S. officinarum, S. sinense and S. spontaneum. A study of inter- and intra species relationships using microsatellite markers
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Analysis of clonal germplasm from five Saccharum species: S. barberi, S. robustum, S. officinarum, S. sinense and S. spontaneum. A study of inter- and intra species relationships using microsatellite markers

机译:分析来自五个蔗糖物种的克隆种质:巴氏链球菌,鲁棒链球菌,厚皮链球菌,中华链球菌和自发链球菌。使用微卫星标记的种间和种内关系的研究

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摘要

In order to study relationships within and among species of the highly complex polyploid genus Saccharum, 30 clones from 5 species (S. barberi, S. officinarum, S. robustum, S. sinense, and S. spontaneum) and 6 cultivated clones were analyzed using 15 sugarcane simple sequence repeat (SSR) markers and two multivariate statistical methods. The origins of two species, S. barberi and S. sinense, are unclear, and it has been hypothesized that they arose from crosses of S. officinarum × S. spontaneum. S. robustum is suggested to be ancestral to S. officinarum, which, when crossed with S. spontaneum, principally comprise the genomes of commercial cultivars. Although our analyses supported S. robustum as being an ancestor of S. officinarum, and show the composition of commercial clones as expected, our results concerning the species S. barberi and S. sinense indicated them to be much less related to the main Saccharum germplasm pool than previous molecular marker investigations, suggesting that introgression from other genera may exist in their ancestry. The differing results of our analysis of S. barberi and S. sinense are likely attributable to more equal and larger numbers of clones studied in each species. Given the extremely high ploidy, the use of only 15 SSR markers enabled clear distinction of Saccharum species and clones, and also identified likely mislabeled accessions. In addition, the replication of DNA extraction, polymerase chain reactions, and fragment electrophoresis increased the robustness of our analysis.
机译:为了研究高度复杂的多倍体酵母属物种之间及其之间的关系,分析了来自5个物种(S. barberi,S。officinarum,S.robustum,S。sinense和S. spontaneum)的30个克隆和6个栽培克隆使用15个甘蔗简单序列重复(SSR)标记和两种多元统计方法。 Barberi和S. sinense这两个物种的起源尚不清楚,据推测它们起源于S. officinarum×S.stantaneum的杂交。鲁棒链球菌被认为是起源于officinarum,当与自发链球菌杂交时,其主要包含商业品种的基因组。尽管我们的分析支持稳健链霉菌是officinarum的祖先,并显示出商业克隆的组成符合预期,但我们关于巴贝利链球菌和中华链球菌物种的研究结果表明它们与主要的蔗糖种质关系不大比以前的分子标记研究更容易发现,这暗示着其他属的渗入可能存在于他们的祖先中。我们对S. barberi和S. sinense的分析结果不同可能是由于每个物种研究的克隆数量更多,数量更多。考虑到极高的倍性,仅使用15个SSR标记就可以清楚地区分蔗糖种和克隆,并鉴定出可能标记错误的种质。此外,DNA提取,聚合酶链反应和片段电泳的复制提高了我们分析的可靠性。

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