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International Rice Research Institute, Los Baños, Philippines
Author(s) -
Cruz F. C. StA.,
Boulton M. I.,
Hull R.,
Azzam O.
Publication year - 1999
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1046/j.1439-0434.1999.00452.x
Subject(s) - biology , virology , vector (molecular biology) , biosafety , germplasm , transmission (telecommunications) , virus , microbiology and biotechnology , veterinary medicine , horticulture , gene , genetics , medicine , engineering , electrical engineering , recombinant dna
A system for agroinoculating rice tungro bacilliform virus (RTBV), one of the two viruses of the rice tungro disease complex, has been optimised. A nontumour‐inducing strain of Agrobacterium (pGV3850) was used in order to conform with biosafety regulations. Fourteen‐day‐old seedlings survived the mechanical damage of the technique and were still young enough to support virus replication. The level of the bacterial inoculum was important to obtain maximum infection, with a high inoculum level (0.5 × 10 12 cells/ml) resulting in up to 100% infection of a susceptible variety that was comparable with infection by insect transmission. Agroinoculation with RTBV was successful for all three rice cultivarss tested; TN1 (tungro susceptible), Balimau Putih (tungro tolerant), and IR26 (RTSV and vector resistant). Agroinoculation enables resistance to RTBV to be distinguished from resistance to the leafhopper vector of the virus, and should prove useful in screening rice germplasm, breeding materials, and transgenic rice lines.