The Biodesign Center for Fundamental and Applied Microbiomics, Center for Evolution and Medicine, School of Life Sciences, Arizona State University, Tempe, AZ 85287-5001, USA.
Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, 41 Boggo Road, Dutton Park, QLD 4102, Australia.
Virus Res. 2017 Jun 15;238:193-197. doi: 10.1016/j.virusres.2017.07.003. Epub 2017 Jul 4.
Most known mastreviruses (family Geminiviridae) infect members of the grass family, Poaceae. Although the greatest number of grass-infecting mastrevirus species have been discovered in Africa, it is apparent that the ten grass-infecting mastrevirus species that have so far only been discovered in south-east Queensland have a degree of diversity that rivals that observed in Africa. In this study, we have used a deep sequencing approach to identify two new mastrevirus species, tentatively named rice latent virus 1 and 2 (RLV 1 and 2), from two, undescribed wild rice species (Oryza AA genome group) in Cape York Peninsula, Queensland. The sequences of these new viruses had less than 70% identity with any previously identified mastrevirus, and therefore their discovery vastly expands the known diversity of monocot-infecting mastreviruses in Australia. This study also highlights the potential risks of novel crop pathogens emerging from uncultivated grass species, as the wild rice hosts are very closely related to domesticated rice.
大多数已知的麦纺锤形病毒（家族 Geminiviridae）感染禾本科植物。尽管在非洲发现了最多的草感染麦纺锤形病毒物种，但显然迄今为止在昆士兰州东南部仅发现的十种草感染麦纺锤形病毒具有与在非洲观察到的相当的多样性。在这项研究中，我们使用深度测序方法从昆士兰州约克角半岛的两个未描述的野生稻种（Oryza AA 基因组组）中鉴定出两种新的麦纺锤形病毒种，暂定名为水稻潜伏病毒 1 和 2（RLV 1 和 2）。这些新病毒的序列与任何先前鉴定的麦纺锤形病毒的同一性都低于 70％，因此它们的发现大大扩展了澳大利亚感染单子叶植物的麦纺锤形病毒的已知多样性。这项研究还强调了从未栽培的禾本科植物中出现新型作物病原体的潜在风险，因为野生稻的宿主与驯化稻非常密切相关。
