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  • Title: High-throughput sequencing of complete genomes of ipomoviruses associated with an epidemic of cassava brown streak disease in the Comoros Archipelago.
    Author: Scussel S, Candresse T, Marais A, Claverie S, Hoareau M, Azali HA, Verdin E, Tepfer M, Filloux D, Fernandez E, Roumagnac P, Robène I, Lefeuvre P, Jourda C, Roux-Cuvelier M, Lett JM.
    Journal: Arch Virol; 2019 Aug; 164(8):2193-2196. PubMed ID: 31123961.
    Abstract:
    Using high-throughput sequencing of small interfering RNAs (siRNAs), virion-associated nucleic acid (VANA), and double stranded RNAs (dsRNAs), we have determined the complete genome sequences of Comorian isolates of two ipomoviruses, cassava brown streak virus (CBSV) and a divergent isolate of Ugandan cassava brown streak virus (UCBSV-KM) representing a new strain of this virus. While the large ORF of CBSV shares the highest nucleotide sequence identity (95.9%) with a Tanzanian isolate of CBSV, the large UCBSV-KM ORF shares the highest nucleotide sequence identity (77.5%) with a Malawian isolate of UCBSV. This low value is near the species demarcation threshold for the family Potyviridae (<76%). Phylogenetic analysis confirms that UCBSV-KM represents a new lineage that is genetically distinct from the currently described UCBSV strains.
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