Bömer Moritz, Rathnayake Ajith I, Visendi Paul, Silva Gonçalo, Seal Susan E
Natural Resources Institute, University of Greenwich, Central Avenue, Chatham Maritime, Kent, ME4 4TB, UK.
Arch Virol. 2018 Feb;163(2):533-538. doi: 10.1007/s00705-017-3605-9. Epub 2017 Nov 13.
Yams (Dioscorea spp.) host a diverse range of badnaviruses (genus Badnavirus, family Caulimoviridae). The first complete genome sequence of Dioscorea bacilliform RT virus 3 (DBRTV3), which belongs to the monophyletic species group K5, is described. This virus is most closely related to Dioscorea bacilliform SN virus (DBSNV, group K4) based on a comparison of genome sequences. Recombination analysis identified a unique recombination event in DBRTV3, with DBSNV likely to be the major parent and Dioscorea bacilliform AL virus (DBALV) the minor parent, providing the first evidence for recombination in yam badnaviruses. This has important implications for yam breeding programmes globally.
山药（薯蓣属）携带多种杆状DNA病毒（杆状DNA病毒属，花椰菜花叶病毒科）。本文描述了属于单系物种组K5的山药杆状逆转录病毒3（DBRTV3）的首个完整基因组序列。基于基因组序列比较，该病毒与山药杆状SN病毒（DBSNV，K4组）关系最为密切。重组分析在DBRTV3中发现了一个独特的重组事件，其中DBSNV可能是主要亲本，山药杆状AL病毒（DBALV）是次要亲本，这为山药杆状DNA病毒的重组提供了首个证据。这对全球的山药育种计划具有重要意义。
