APPLICATION OF MARKER ASSISTED BACKROSSING IN RICE BREEDING TO COPE WITH CLIMATE CHANGE IN VIETNAM

Application of DNA molecular marker in aromatic rice breeding has been carried out since 2007 at Field Crop Research Institute (FCRI). The results showed that the ASA (Allen Specific Amplification) marker BADH2 including four primers EAP; ESP; IFAP and INSP can be selected for identifying fgr gene controlling fragrant flavour of rice in rice materials with high confidence. Application of this marker in aromatic rice selection, in the total of 800 rice individuals of F2-F3 generation was examined for fgr gene, 250 of them carried fgr gene and 109 of which carried homogeneities of this gene. The lines holding homogenous fgr gene have been developed and selected for phenotype evaluation of aroma and further characteristics such as the quality, yield, and biotic, also abiotic stress tolerances. One of them, named HDT8, containing aroma and other good characteristics has been selected to be put in the system of National trials, also in ecological trails in Northern region of Vietnam since 2010. The HDT8 rice variety, highly appreciated for the quality and yield, has been released into production in the Northern region of Vietnam since the summer season of 2011.