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Updated: Apr 3, 2026

Optimization and Comparative Analysis of Plant Organellar DNA Enrichment Methods Suitable for Next-generation Sequencing
Published on: July 28, 2017
The first complete chloroplast genome of Cosmos sulphureus Cav. 1791 (Asteraceae) and its phylogenetic analysis
Qingxia Chen1, Ruolan Gao1, Chang Liu1
1The First Clinical School of Zhengzhou University, Zhengzhou University, Zhengzhou City, PR China.
Abstract:
Cosmos sulphureus is an annual ornamental plant with pharmaceutical and biopesticidal value. Here, we report its first complete chloroplast genome (150,870 bp), featuring a typical quadripartite structure and 37.52% GC content. The genome comprised 129 predicted genes, including 86 protein-coding genes, 35 tRNAs, and eight rRNAs. A triple inversion was identified in the LSC region: an ∼83.9 kb large repeat nested an ∼18.8 kb medium repeat, which in turn enclosed a ∼3.4 kb small repeat. Phylogenetically, C. sulphureus and C. bipinnatus form a monophyletic clade, diverging ∼1.593 Mya. These findings provide genetic resources for future studies of the genus.
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