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- W1976013973 abstract "The recombinant isolates of tobacco veinal necrotic strain of Potato virus Y (PVYN) and potato tuber necrotic group (PVY(NTN)) contain segments of the PVYO and the PVY(N) genome. Three major recombinant junctions (RJ) are present in the genome of the recombinant PVY(NTN) at sites HC/Pro-P3, 6K2-NIa, and the C-terminal region of CP gene and one RJ at HC/Pro-P3 site in some recombinant PVYN isolates (termed PVY(N:O)). Protocols for specific differentiation of the recombinant PVY(NTN) and PVY(N:O) from the non-recombinant PVYN are described. Specific primer pairs were designed to target the three RJs so that sense and antisense primers completely matched the nucleotide sequences at either side of the RJ. In a uniplex reverse transcription-polymerase chain reaction (RT-PCR), the first primer pair amplified a fragment of 641bp from the recombinant PVY(NTN) and PVY(N:O). The second and third primer pairs exclusively amplified fragments of 448 and 290bp, respectively from the recombinant PVY(NTN). In a multiplex (triplex) RT-PCR, when all three primer pairs were used simultaneously, the three fragments (641, 448 and 290bp) were amplified exclusively from the recombinant PVY(NTN), while only one fragment (641bp) was amplified from the PVY(N:O) isolates, clearly differentiating the two recombinant isolates. No amplification was observed from the non-recombinant PVY, including PVYO and North American (NA)-PVY(N/NTN). For further improvement of the multiplex RT-PCR, effects of cDNA preparation using specific antisense primers, random primers or oligo(dT) plus random primers were investigated. The cDNA prepared by random primer plus oligo(dT) increased the overall band intensity." @default.
- W1976013973 created "2016-06-24" @default.
- W1976013973 creator A5064979434 @default.
- W1976013973 creator A5091213865 @default.
- W1976013973 date "2003-11-01" @default.
- W1976013973 modified "2023-10-16" @default.
- W1976013973 title "Specific differentiation of recombinant PVYN:O and PVYNTN isolates by multiplex RT-PCR" @default.
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- W1976013973 doi "https://doi.org/10.1016/s0166-0934(03)00221-0" @default.
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