Transcriptome analysis of the roots at early and late seedling stages using Illumina paired-end sequencing and development of EST-SSR markers in radish

文献类型： 外文期刊

第一作者： Wang, Shufen

作者： Wang, Shufen;He, Qiwei;Liu, Xianxian;Xu, Wenling;Li, Libin;Gao, Jianwei;Wang, Fengde;Wang, Xiufeng

作者机构：

关键词： EST-SSR markers;Illumina paired-end sequencing;Radish;Tuberous root;Transcriptome

期刊名称：PLANT CELL REPORTS （ 影响因子：4.57； 五年影响因子：4.463 ）

ISSN： 0721-7714

年卷期： 2012 年 31 卷 8 期

页码：

收录情况： SCI

摘要： The tuberous root of radish is an important vegetable, but insufficient transcriptomic and genomic data are currently available to understand the molecular mechanisms underlying tuberous root formation and development. High-throughput transcriptomic sequencing is essential to generate a large transcript sequence data set for gene discovery and molecular marker development. In this study, a total of 107.3 million clean reads were generated using Illumina paired-end sequencing technology. De novo assembly generated 61,554 unigenes with an average length of 820 bp. Based on a sequence similarity search with known proteins or nucleotides, 85.51 % (52,634), 90.18 % (55,507) and 54 % (33,242) consensus sequences showed homology with sequences in the Nr, Nt and Swiss-Prot databases, respectively. Of these annotated unigenes, 21,109 and 17,343 unigenes were assigned to gene ontology categories and clusters of orthologous groups, respectively. A total of 27,809 unigenes were assigned to 123 pathways in the Kyoto Encyclopedia of Genes and Genomes database. Analysis of transcript differences between libraries from the early and late seedling developmental stages demonstrated that starch and sucrose metabolism and phenylpropanoid biosynthesis may be the dominant metabolic events during tuberous root formation and plant hormones probably play critical roles in regulation of this developmental process. In total, 14,641 potential EST-SSRs were identified among the unigenes, and 12,733 primer pairs for 2,511 SSR were obtained. Summarily, this study gave us a clue to understand the radish tuberous root formation and development, and also provided us with a valuable sequence resource for novel gene discovery and marker-assisted selective breeding in radish. De novo assembled and characterized the radish tuberous root transcriptome; explored the mechanism of radish tuberous root formation; development of EST-SSR markers in radish.

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