Zhang Zhixiang, Faure Chantal, Marais Armelle, Monteiro Amélie, Candresse Thierry
Univ. Bordeaux, INRAE, UMR 1332 Biologie du Fruit et Pathologie, CS20032, 33882, Villenave d'Ornon Cedex, France.
State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, 100193, Beijing, China.
Arch Virol. 2025 Jan 9;170(2):34. doi: 10.1007/s00705-025-06223-7.
A novel capulavirus was identified by high-throughput sequencing in four sugar beet (Beta vulgaris L.) plants collected in April 2023 in Normandy (France). The complete genome of 2744 nucleotides (nt) was sequenced and found to have an organization similar to that of known capulaviruses, with which it showed close phylogenetic relationships. In addition, data mining of a publicly available Thalictrum thalictroides whole-genome shotgun sequence assembly allowed the identification of a contig (JABWDY010003008.1) representing a longer-than-unit length, likely episomal, genome with 99.4% nt sequence identity to the genome of the French beet isolate. The genome of the novel virus shares only 60.7-66.9% nt sequence identity with known capulaviruses, which is well below the species demarcation threshold of 78%, suggesting that a new species should be created to accommodate it. The common name "beet capulavirus 1" (BCV1) is proposed for this novel virus. Given that BCV1 was identified in plants that were coinfected with beet yellows virus, no conclusions can be drawn at this stage about its potential pathogenicity.
2023年4月在法国诺曼底采集的4株甜菜（Beta vulgaris L.）植株中，通过高通量测序鉴定出一种新型帽状病毒。对其2744个核苷酸（nt）的完整基因组进行了测序，发现其基因组结构与已知帽状病毒相似，且在系统发育上与之关系密切。此外，对公开可用的唐松草（Thalictrum thalictroides）全基因组鸟枪法序列组装进行数据挖掘，鉴定出一个重叠群（JABWDY010003008.1），它代表一个比单位长度更长的、可能是游离型的基因组，与法国甜菜分离株的基因组具有99.4%的核苷酸序列同一性。这种新型病毒的基因组与已知帽状病毒的核苷酸序列同一性仅为60.7 - 66.9%，远低于78%的物种划分阈值，这表明应创建一个新物种来容纳它。为此新型病毒提议通用名称为“甜菜帽状病毒1”（BCV1）。鉴于BCV1是在与甜菜黄化病毒共同感染的植株中鉴定出来的，现阶段无法就其潜在致病性得出结论。
