ISHS Acta Horticulturae 370: International Symposium on Tropical Fruits
COAT PROTEIN-MEDIATED PROTECTION AND CLASSICAL CROSS PROTECTION TO CONTROL PAPAYA RINGSPOT VIRUS IN PAPAYA. |
| Authors: | P. Tennant, M. Fitch, S. Lius, C. Gonsalves, R. Manshardt, J. Sanford, J.L. Slightom, D. Gonsalves |
| Abstract:
Transgenic Solo papaya with the coat protein gene of the mild papaya ringspot virus from Hawaii were generated from a cross between a female transgenic Ro line and nontransgenic papaya. The transgenic papaya showed high levels of resistance when inoculated with three severe papaya ringspot virus (PRV) isolates from Hawaii. However, transgenic papaya inoculated with PRV isolates from different parts of the world showed various degrees of susceptibility. All plants became infected when inoculated with isolates from Brazil, Jamaica, and Thailand, even though there were 3–18 days delay in symptom development. PRV isolates from the Bahamas and Mexico infected 29–44% of the inoculated plants. Similar results were obtained when nontransgenic papaya were cross protected by the mild PRV Havaiian strain and challenged with these PRV isolates. | |
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