Abstract
Mealybug wilt of pineapple (MWP) is the most important and complex viral disease affecting pineapple worldwide. High-throughput sequencing was conducted to characterize a new virus identified only in symptomatic pineapple plants and tentatively named pineapple mealybug wilt-associated virus 6 (PMWaV-6). Data analyses revealed a genome of 17,854 nucleotides with an organization resembling members of the genus Ampelovirus, family Closteroviridae. Encoded proteins shared sequence identity with the corresponding proteins of grapevine leafroll-associated virus 3, blackberry vein banding-associated virus, and PMWaV-2. The present study reports the discovery of PMWaV-6, a putative and distinct new member of the genus Ampelovirus, subgroup I, its potential involvement in MWP, and the development of PMWaV-6-specific RT-PCR assays to detect and monitor this virus in field samples.
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