INRA, UR407 Unité de Pathologie Végétale, 84140, Montfavet, France.
Arch Virol. 2014 Feb;159(2):277-89. doi: 10.1007/s00705-013-1798-0. Epub 2013 Aug 25.
In recent years, three new potyviruses have been described in the papaya ringspot virus (PRSV) cluster. In addition, two types of PRSV are recognized, type W, infecting cucurbit plants, and type P, infecting papaya and also cucurbits. A third type, PRSV-T, was also partially described in Guadeloupe. Complete genome sequencing of four PRSV-T isolates showed that this virus is a related virus that is distinct from PRSV, and the name zucchini tigré mosaic virus (ZTMV) is proposed, in reference to the typical symptoms observed in zucchini squash. Eleven other viral isolates from different geographic origins were confirmed as ZTMV isolates using the complete sequence of the cylindrical inclusion (CI) coding region, whereas pairwise sequence similarities in the coat protein (CP) coding region did not unambiguously distinguish ZTMV isolates from PRSV isolates. The use of the CI coding region for species demarcation appears more suitable than the CP coding region for closely related viruses. Principal coordinates analysis based on the biological behavior of the viral isolates studied clustered PRSV-P, PRSV-W and ZTMV isolates into three different groups. Therefore, ZTMV is different from PRSV in its molecular and biological properties.
近年来，在木瓜环斑病毒（PRSV）簇中已描述了三种新的马铃薯 Y 病毒属病毒。此外，还鉴定出两种类型的 PRSV，即 W 型，感染葫芦科植物；和 P 型，感染木瓜，也感染葫芦科植物。在瓜德罗普岛也部分描述了第三种类型 PRSV-T。对四个 PRSV-T 分离物的完整基因组测序表明，该病毒是一种与 PRSV 不同的相关病毒，并提出了西葫芦虎斑花叶病毒（ZTMV）的名称，这是参考在西葫芦上观察到的典型症状。使用圆柱状内含体（CI）编码区的完整序列，从不同地理来源的另外 11 个病毒分离物被确认为 ZTMV 分离物，而在外壳蛋白（CP）编码区的成对序列相似性不能明确区分 ZTMV 分离物和 PRSV 分离物。CI 编码区用于物种划分似乎比 CP 编码区更适合用于密切相关的病毒。基于所研究的病毒分离物的生物学行为的主坐标分析将 PRSV-P、PRSV-W 和 ZTMV 分离物聚类为三个不同的组。因此，ZTMV 在分子和生物学特性上与 PRSV 不同。
