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De Novo Assembly and Characterization of the Transcriptome, and Development of SSR Markers in Wax Gourd (Benicasa hispida)

文献类型： 外文期刊

作者： Jiang, Biao 1 ; Xie, Dasen 1 ; Liu, Wenrui 1 ; Peng, Qingwu 1 ; He, Xiaoming 1 ;

作者机构： 1.Guangdong Acad Agr Sci, Vegetable Res Inst, Guangzhou, Guangdong, Peoples R China

2.Guangdong Prov Key Lab New Technol Res Vegetables, Guangzhou, Guangdong, Peoples R China

期刊名称：PLOS ONE （ 影响因子：3.24； 五年影响因子：3.788 ）

ISSN： 1932-6203

年卷期： 2013 年 8 卷 8 期

页码：

收录情况： SCI

摘要： Background: Wax gourd is a widely used vegetable of Cucuribtaceae, and also has important medicinal and health values. However, the genomic resources of wax gourd were scarcity, and only a few nucleotide sequences could be obtained in public databases. Methodology/Principal Findings: In this study, we examined transcriptome in wax gourd. More than 44 million of high quality reads were generated from five different tissues of wax gourd using Illumina paired-end sequencing technology. Approximately 4 Gbp data were generated, and de novo assembled into 65,059 unigenes, with an N50 of 1,132 bp. Based on sequence similarity search with known protein database, 36,070 (55.4%) showed significant similarity to known proteins in Nr database, and 24,969 (38.4%) had BLAST hits in Swiss-Prot database. Among the annotated unigenes, 14,994 of wax gourd unigenes were assigned to GO term annotation, and 23,977 were found to have COG classifications. In addition, a total of 18,713 unigenes were assigned to 281 KEGG pathways. Furthermore, 6,242 microsatellites (simple sequence repeats) were detected as potential molecular markers in wax gourd. Two hundred primer pairs for SSRs were designed for validation of the amplification and polymorphism. The result showed that 170 of the 200 primer pairs were successfully amplified and 49 (28.8%) of them exhibited polymorphisms. Conclusion/Significance: Our study enriches the genomic resources of wax gourd and provides powerful information for future studies. The availability of this ample amount of information about the transcriptome and SSRs in wax gourd could serve as valuable basis for studies on the physiology, biochemistry, molecular genetics and molecular breeding of this important vegetable crop.

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