Diversity, Distribution, and Evolution of Tomato Viruses in China Uncovered by Small RNA Sequencing

文献类型： 外文期刊

第一作者： Xu, Chenxi

作者： Xu, Chenxi;Cai, Xiaofeng;Wang, Xiaoli;Ge, Chenhui;Wang, Quanxi;Fei, Zhangjun;Wang, Quanhua;Sun, Xuepeng;Taylor, Angela;Jiao, Chen;Xu, Yimin;Fei, Zhangjun;Pan, Guanghui;Fei, Zhangjun

作者机构：

关键词： small RNA sequencing;tomato virome;viral diversity and evolution

期刊名称：JOURNAL OF VIROLOGY （ 影响因子：4.0； 五年影响因子：4.0 ）

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收录情况： SCI

摘要： Tomato is a major vegetable crop that has tremendous popularity. However, viral disease is still a major factor limiting tomato production. Here, we report the tomato virome identified through sequencing small RNAs of 170 field-grown samples collected in China. A total of 22 viruses were identified, including both well-documented and newly detected viruses. The tomato viral community is dominated by a few species, and they exhibit polymorphisms and recombination in the genomes with cold spots and hot spots. Most samples were coinfected by multiple viruses, and the majority of identified viruses are positive-sense single-stranded RNA viruses. Evolutionary analysis of one of the most dominant tomato viruses, Tomato yellow leaf curl virus (TYLCV), predicts its origin and the time back to its most recent common ancestor. The broadly sampled data have enabled us to identify several unreported viruses in tomato, including a completely new virus, which has a genome of similar to 13.4 kb and groups with aphid-transmitted viruses in the genus Cytorhabdovirus. Although both DNA and RNA viruses can trigger the biogenesis of virus-derived small interfering RNAs (vsiRNAs), we show that features such as length distribution, paired distance, and base selection bias of vsiRNA sequences reflect different plant Dicer-like proteins and Argonautes involved in vsiRNA biogenesis. Collectively, this study offers insights into host-virus interaction in tomato and provides valuable information to facilitate the management of viral diseases.

分类号： Q934.2

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