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  • Title: The genomic and biological characterization of Citrullus lanatus cryptic virus infecting watermelon in China.
    Author: Xin M, Cao M, Liu W, Ren Y, Lu C, Wang X.
    Journal: Virus Res; 2017 Mar 15; 232():106-112. PubMed ID: 28238875.
    Abstract:
    A dsRNA virus was detected in the watermelon (Citrullus lanatus) samples collected from Kaifeng, Henan province, China through the use of next generation sequencing of small RNAs. The complete genome of this virus is comprised of dsRNA-1 (1603nt) and dsRNA-2 (1466nt), both of which are single open reading frames and potentially encode a 54.2kDa RNA-dependent RNA polymerase (RdRp) and a 45.9kDa coat protein (CP), respectively. The RdRp and CP share the highest amino acid identities 85.3% and 75.4% with a previously reported Israeli strain Citrullus lanatus cryptic virus (CiLCV), respectively. Genome comparisons indicate that this virus is the same species with CiLCV, whereas the reported sequences of the Israeli strain of CiLCV are partial, and our newly identified sequences can represent the complete genome of CiLCV. Futhermore, phylogenetic tree analyses based on the RdRp sequences suggest that CiLCV is one member in the genus Deltapartitivirus, family Partitiviridae. In addition, field investigation and seed-borne bioassays show that CiLCV commonly occurs in many varieties and is transmitted though seeds at a very high rate.
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