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. 2022 Feb;65(2):426-437.
doi: 10.1007/s11427-020-1936-2. Epub 2021 Jun 17.

Viromes in marine ecosystems reveal remarkable invertebrate RNA virus diversity

Yu-Yi Zhang #  1   2 , Yicong Chen #  1 , Xiaoman Wei  1   2 , Jie Cui  3   4
Affiliations

Viromes in marine ecosystems reveal remarkable invertebrate RNA virus diversity

Yu-Yi Zhang et al. Sci China Life Sci. 2022 Feb.

Abstract

Little is known about ocean viromes and the ecological drivers of the evolution of aquatic RNA viruses. This study employed a meta-transcriptomic approach to characterize the viromes of 58 marine invertebrate species across three seas. This revealed the presence of 315 newly identified RNA viruses in nine viral families or orders (Durnavirales, Totiviridae, Bunyavirales, Hantaviridae, Picornavirales, Flaviviridae, Hepelivirales, Solemoviridae, and Tombusviridae), with most of them being sufficiently divergent to the already documented viruses. Notably, this study revealed three marine invertebrate hantaviruses that are rooted to vertebrate hantaviruses, further supporting that hantaviruses may have a marine origin. We have also found evidence for possible host sharing and switch events during virus evolution. Overall, we have revealed the hidden diversity of marine invertebrate RNA viruses.

Keywords: RNA virome; aquatic invertebrate; evolution; host sharing; ocean.

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