The plant virus family Flexiviridae includes the definitive genera Potexvirus, Mandarivirus, Allexivirus, Carlavirus, Foveavirus, Capillovirus, Vitivirus, Trichovirus, the putative genus Citrivirus, and some unassigned species. Its establishment was based on similarities in virion morphology, common features in genome type and organization, and strong phylogenetic relationships between replicational and structural proteins. In this review, we provide a brief account of the main biological and molecular properties of the members of the family, with special emphasis on the relationships within and among the genera. In phylogenetic analyses the potexvirus-like replicases were more closely related to tymoviruses than to carlaviruses. We postulate a common evolutionary ancestor for the family Tymoviridae and the two distinct evolutionary clusters of the Flexiviridae, i.e., a plant virus with a polyadenylated genome, filamentous virions, and a triple gene block of movement proteins. Subsequent recombination and gene loss would then have generated a very diverse group of plant and fungal viruses.

中文翻译：

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弹性病毒科：病毒体和基因组可塑性的案例研究。

植物病毒科Flexiviridae包括定型的Potexvirus，Mandarivirus，Allexivirus，Carlavirus，Foveavirus，Capillovirus，Vitivirus，Trichovirus，推定的Citrivirus属以及一些未指定的物种。它的建立是基于病毒体形态的相似性，基因组类型和组织的共同特征以及复制蛋白和结构蛋白之间的强系统发育关系。在这篇综述中，我们简要介绍了该家族成员的主要生物学和分子特性，并特别强调了属内和属之间的关系。在系统发育分析中，类似于potexvirus的复制品与鼓膜病毒的相关性比与carlaviruses的紧密相关。我们假定了酪氨酸病毒科和弯曲病毒科的两个不同进化簇的共同进化祖先，即具有聚腺苷酸化基因组的植物病毒，丝状病毒体和运动蛋白的三重基因块。随后的重组和基因损失将产生一组非常多样化的植物和真菌病毒。