De novo gene set assembly of the transcriptome of diploid, oilseed-crop species Perilla citriodora
2016
Kim, J.E., SEEDERS Inc., Daejeon, Republic of Korea | Choe, J., SEEDERS Inc., Daejeon, Republic of Korea | Lee, W.K., SEEDERS Inc., Daejeon, Republic of Korea | Kim, S., SEEDERS Inc., Daejeon, Republic of Korea | Lee, M.H., National Institute of Crop Science, RDA, Miryang, Republic of Korea | Kim, T.H., National Academy of Agricultural Science, RDA, Wanju, Republic of Korea | Jo, S.H., SEEDERS Inc., Daejeon, Republic of Korea | Lee, J.H., SEEDERS Inc., Daejeon, Republic of Korea
High-quality gene sets are necessary for functional research of genes. Although Perilla is a commonly cultivated oil crop and vegetable crop in Southeast Asia, the quality of its available gene set is insufficient. To construct a high-quality Perilla gene set, we sequenced mRNAs extracted from different tissues of Perilla citriodora, the wild species (2n = 20) of Perilla. To make a high-quality gene set for P. citriodora, we compared the quality of assemblies produced by Velvet and Trinity, the two well-known de novo assemblers, and improved the de novo assembly pipeline by optimizing k-mers and removing redundant sequences. We then selected representative transcripts for loci according to several criteria. The improved assembly yielded a total of 86,396 transcripts and 38,413 representative transcripts. We evaluated the assembled transcripts by comparing them to 638 homologous Arabidopsis genes involved in fatty acid and TAG biosynthesis pathways. High proportions of full-length genes and transcripts in the assembled transcripts matched known genes in other species, indicating that the P. citriodora gene set can be applied in future functional studies. Our study provides a reference P. citriodora gene set for further studies. It will serve as valuable genetic resource to elucidate the molecular basis of various metabolisms.
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