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Updated: Jul 10, 2025
Combining Analysis of DNA in a Crude Virion Extraction with the Analysis of RNA from Infected Leaves to Discover New Virus Genomes
Published on: July 27, 2018
Identification and complete genome sequence of a novel sadwavirus discovered in chrysanthemum (Chrysanthemum
Jie Chen1, Yafeng Dong2, Hui Wang1
1Jiaxing Academy of Agricultural Science, Jiaxing, China.
Abstract:
The complete genome sequence of a putative novel member of the genus Sadwavirus was determined by high-throughput sequencing of a chrysanthemum from an orchard of the Tongxiang Agricultural Science Institute in Tongxiang, Zhejiang province. The complete genome sequence was confirmed using RT-PCR and the rapid amplification of cDNA ends (RACE) method. The predicted genome of the putative virus is composed of two RNA molecules, 7016 and 6772 nucleotides in length, excluding their poly-A tails. The new virus was tentatively named "chrysanthemum sadwavirus" (ChSV). The Pro-Pol region of RNA1 and the CP region of RNA2 of ChSV shared the highest amino acid sequence identity (53.01% and 36.40%, respectively) with the corresponding sequences of lettuce secovirus 1 (LSV-1). Phylogenetic analysis showed that ChSV clustered with members of the subgenus Stramovirus (genus Sadwavirus). Taken together, these results suggest that ChSV is a new member of the genus Sadwavirus.
