Genetic Analysis of Tolerance to Rice Tungro Bacilliform Virus in Rice (Oryza sativa L.) Through Agroinoculation |
| |
| Authors: | N. S. Zenna F. C. Sta Cruz E. L. Javier I. A. Duka A. A. Barrion O. Azzam |
| |
| Affiliation: | Authors' addresses: Institute of Biological Sciences, University of the Philippines at Los Baños, College, Laguna 4031, Philippines;;Entomology and Plant Pathology Division, International Rice Research Institute, DAPO Box 7777, Metro Manila, Philippines;;Crop Protection Cluster, College of Agriculture, University of the Philippines at Los Baños, College, Laguna 4031, Philippines;;Genetic Resources Center, International Rice Research Institute, DAPO Box 7777, Metro Manila, Philippines;;CAMBIA, PO Box 3200, ACT 2601, Australia (correspondence to N. Zenna. E-mail: ) |
| |
| Abstract: | Balimau Putih [an Indonesian cultivar tolerant to rice tungro bacilliform virus (RTBV)] was crossed with IR64 (RTBV, susceptible variety) to produce the three filial generations F1, F2 and F3. Agroinoculation was used to introduce RTBV into the test plants. RTBV tolerance was based on the RTBV level in plants by analysis of coat protein using enzyme‐linked immunosorbent assay. The level of RTBV in cv. Balimau Putih was significantly lower than that of IR64 and the susceptible control, Taichung Native 1. Mean RTBV levels of the F1, F2 and F3 populations were comparable with one another and with the average of the parents. Results indicate that there was no dominance and an additive gene action may control the expression of tolerance to RTBV. Tolerance based on the level of RTBV coat protein was highly heritable (0.67) as estimated using the mean values of F3 lines, suggesting that selection for tolerance to RTBV can be performed in the early selfing generations using the technique employed in this study. The RTBV level had a negative correlation with plant height, but positive relationship with disease index value. |
| |
| Keywords: | agroinoculation rice tungro bacilliform virus tolerance |
|
|
