Key result
BYDV-GAV genomic RNA shares high sequence identity with MAV-PS1, indicating close relation to BYDV-MAV.
Why the study?
The complete nucleotide sequence and genomic organization of Barley yellow dwarf virus-GAV were not previously determined or compared with related luteoviruses.
The complete nucleotide sequence of genomic RNA of BYDV-GAV was determined. It comprised 5685 nucleotides and contained six open reading frames and four un-translated regions. The size and organization of BYDV-GAV genome were similar to those of BYDV PAV-aus. The nucleotide and deduced amino acid sequences of the six ORFs were aligned and compared with those of other luteoviruses. The results showed that there was a high degree of identity between BYDV-GAV and MAV-PS1 in all ORFs except ORF5 and ORF6, which had only 87.4% and 70.2% identities respectively. The reported genomic nucleotide sequence of MAV was shorter than that of BYDV-GAV, but the comparison of the genomic nucleotide sequences for MAV-PS1 and GAV showed 90.4% sequence identity for the same region of the genome. According to the level of sequence similarities, BYDV-GAV should be closely related to BYDV-MAV.
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Zhibo Jin (2004) studied Barley yellow dwarf virus-GAV. Genomic sequencing of BYDV-GAV vs. Other luteoviruses (MAV-PS1, BYDV PAV-aus) was evaluated on Nucleotide and amino acid sequence identity. The complete 5685-nucleotide genomic RNA sequence of BYDV-GAV showed high identity with MAV-PS1 in all ORFs except ORF5 (87.4%) and ORF6 (70.2%), indicating it is closely related to BYDV-MAV.
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