Identifying genes related to terpenoids biosynthesis pathway and investigating phylogenetic relationship of different Thymus species ‎using chloroplast data

Soorni, Aboozar; Karimzadeh, Parnian; Dehghani, Samira

doi:10.30473/cb.2023.68561.1916

Identifying genes related to terpenoids biosynthesis pathway and investigating phylogenetic relationship of different Thymus species ‎using chloroplast data

Document Type : Research Paper

Authors

Department of Biotechnology, College of Agriculture, Isfahan University of Technology, Isfahan, Iran

10.30473/cb.2023.68561.1916

Abstract

Thyme species are very important due to the production of secondary metabolites such as terpenoids. Since the identification of key genes such as genes related to terpenoids biosyntesis pathway can play an effective role in plant breeding programs, especially thyme species, the present study was aimed to investigate the transcriptomes of T. daenensis, T. vulgaris, T. lancifolius, T. persicus, T. pubescens to identify key genes in the biosynthesis of monoterpenoids, chloroplast genes sequence and evaluation of similarities and differences among these species. For this purpose, total RNAs extracted from vegetative growth were sent to Macrogene of Korea for sequencing with theIllumina HiSeq 2500 platform. After assembling the sequences using various tools, the best results was selected and transcripts were documented in different databases. Then, according to the documented results, key genes responsible in the synthesis of terpenoids and chloroplast gene sequence were identified, and then phylogenetic relationships among species was investigated. According to the evaluation indicators, the best assembly was a product of Binpacker tools. Based on the results, the sequence of 10 genes involved in the synthesis of terpenoids was obtained. Interestingly, among the identified TPSs, most of the contigs were classified into the TPSb and TPSa classes of terpenoids. The sequence of 73 chloroplast genes was extracted from the transcriptome data and finally the phylogenetic relationship was evaluated according to 400, 70 bp of cpDNA. The study of phylogenetic relationships showed a close genetic relationship between T. daenensi and T.vulgaris which can introduce T. daenensis as an appropriate replacement for T. vulgaris in different purpose, especially in pharmacological applications. The results show that Z. multiflora can most probably be as one of the ancestors of Thymus, which is significantly different from Thymus species in terms of its genetic structure, especially the key genes of the terpene biosynthesis pathway.

Keywords

Main Subjects

Bioinformatics

References

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