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Genetic variability of Polish tomato black ring virus isolates and their satellite RNAs
Plant Pathology ( IF 2.3 ) Pub Date : 2020-05-07 , DOI: 10.1111/ppa.13188
Aleksandra Zarzyńska‐Nowak 1 , Beata Hasiów‐Jaroszewska 1 , Daria Budzyńska 1 , Katarzyna Trzmiel 1
Affiliation  

Tomato black ring virus (TBRV), a member of the Nepovirus genus, is a serious plant pathogen distributed worldwide. It causes significant damage to several economically important crops, such as artichoke or strawberry. The TBRV bipartite genome consists of two polyadenylated single‐stranded positive‐sense RNA molecules, which may be accompanied by subviral particles such as defective interfering RNAs (DI RNAs) and satellite RNAs (satRNAs). In this study, we obtained the complete genome sequence of six TBRV isolates originating from different hosts and determined the presence of eight TBRV satRNAs. Subsequently, genetic variability, recombination, phylogenetic and selection pressure analyses were performed. The results revealed that the TBRV population is genetically diverse. The occurrence of potential recombination events, evidence of positive selection pressure acting on particular codons and the diversification of satRNAs within the TBRV population indicated that the virus mutates and can rapidly adapt to new environmental conditions or hosts. The presented data shed some light on TBRV evolutionary dynamics and epidemiology.

中文翻译:

波兰番茄黑环病毒分离株及其卫星RNA的遗传变异

番茄黑环病毒(TBRV),神经病毒的成员属,是一种严重的植物病原体,分布于世界各地。它会严重损害一些经济上重要的农作物,例如朝鲜蓟或草莓。TBRV二分基因组由两个聚腺苷酸化的单链正义RNA分子组成,可能伴随着亚病毒颗粒,例如有缺陷的干扰RNA(DI RNA)和卫星RNA(satRNA)。在这项研究中,我们获得了来自不同宿主的六个TBRV分离株的完整基因组序列,并确定了八个TBRV satRNA的存在。随后,进行了遗传变异性,重组,系统发育和选择压力分析。结果表明,TBRV人群具有遗传多样性。潜在的重组事件的发生,正选择压力作用于特定密码子以及TBRV群体中satRNA多样化的证据表明,该病毒会发生变异并可以迅速适应新的环境条件或宿主。提出的数据为TBRV的进化动力学和流行病学提供了一些启示。
更新日期:2020-05-07
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