Four poleroviral isolates from Greece, two from lettuce, one from spinach and one from watermelon showing yellowing symptoms, were molecularly characterized by analyzing the sequence of a large part of the genome spanning from the 3′-terminal part of the RdRp to the end of the CP gene. The sequences were analyzed for their similarity and phylogenetic relationships to other members of the genus Polerovirus as well as for evidence of recombination events. The results revealed the existence of two putatively new viruses: one from lettuce and one from spinach, provisionally named “lettuce yellows virus” and “spinach yellows virus”, respectively. Also, a new recombinant virus infecting lettuce, herein named “lettuce mild yellows virus”, and a watermelon isolate of pepo aphid-borne yellows virus (PABYV) were identified. Our study highlights the existence of high genetic diversity within the genus Polerovirus , which could be associated with the emergence of new viral diseases in various crops worldwide.
Archives of Virology – Springer Journals
Published: Feb 1, 2016
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