PVYOPotomac Valley Youth Orchestra (Potomac, Md)
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PVYO (ordinary) PVYC (common) PVYN (necrotic) PVYZ and PVYE arefive strains group of potato isolates while new recombinant genotype/strains (PVYN/NTN PVYNTN PVYNWI and PVYNTN-NWI) have been evolved from the genomic recombination in PVY (Ali et al.
The sequences ofPakistani isolates (JQ425622) and JQ518266) PVY(AY792597.1 AY061994.1 and JN635310.1) PVY N (AF012026.1 and AF012027.1) PVY (EF027891.1 AB025415.1 AB025417.1 EF027859.1 EF027861.1 NTN EF027886.1 AY319647.1 and GQ853665.1) PVY (AJ133454.1 EF027869.1 EF027879.1 EF027901.1 EF027897.1 EF027863.1 EU161658.1 EF027881.1 and N/NTN EF027898.1) PVY (AB295479.1 HQ631374.1 and AB295477.1) and PVYfurther analyzed and a phylogenetic tree with four different groups PVYNTN-PVYN/NTN PVYN-PVYN-WI PVYO and PVYC was obtained (Fig 4).
The increasing incidence of PVY has become the major threat in Pakistan and only PVYO strain was confirmed serologically and no nucleotide evidence was reported previously (Abbas et al.
The amino acids sequence of Pakistani isolates showed maximum genetic similarity99.97% with PVYNTN-PVYN/NTN group and minimum 99% with PVYO group (Fig 3) while higher percentage nucleotide identity is due to high conserve sequence of CP gene in the genome of PVY (Rodriguez et al.
PVY is extremely variable and three groups of strains are recognized (PVYO PVYN and PVYC).
Distribution of PLRV PVS PVX and PVY (PVYN PVYo and PVYc) in the seed potato tubers in Turkey.