Abstract

Gastrodia elata is a traditional Chinese herbal medicine with good therapeutic effect on various nervous and cerebrovascular diseases. In the present study, we generated 20,611,556 raw reads from the young tuber transcriptome of a G. elata hybrid (Gastrodia elata BI.f.elata × Gastrodia elata BI.f.pilifera) by using Illumina HiSeq™ 4000 sequencing platform. De novo assembly and bioinformatics analysis revealed 20,237,474 clean reads, including 2,529,684,250bp that assembled into 34,323 unigenes with an average length of 695.19bp. Among them, 24,698 (71.96%) unigenes were annotated by at least one of the Nr, Swiss-Prot, COG and KEGG databases. A total of 4236 (12.34%) unigenes were identified as candidate transcription factors, and 2007 (5.85%) unigenes were found to contain at least one single sequence repeat (SSR). Of these SSRs, AG/CT repeat motif was the most frequent, with a total of 498 (21.67%). This study will enhance our understanding about the molecular mechanism of physiological metabolism, growth and development of G. elata, particularly abundant SSR markers will offer plenty of alternative tools for further studies about molecular genetics, molecular breeding and association analysis.

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