Pyramiding two genes of aroma and drought tolerance on backcrossing rice lines for Mekong river

Nguyen Thi Lang, Trinh Thi Luy,

Nguyen Ngoc Huong, Tran Bao Toan, Bui Chi Buu

Abstract

75 BC₃F₄ lines screened from populations OM6162/Sawana-Sub1//OM6162 developed in CuuLong Delta Rice Research Institute were evaluated on level of drought response and aroma at flowering stage. Genetic factors of these rice lines were also identified again via molecular marker after evaluating on tolerance to drought and aroma. Three evaluated molecular markers including RM201, RM105, RM23662 were associated with drought genes on chromosome 9 and other tree markers as RG223, RG28F-R; SP6 were associated with aroma on chromosome 8. Results were recorded that there were association between genotype and phenotype. 14 among the studied lines of OM6162/SawanaSub1//OM6162 combination were selected but only two lines had aromatic and drought genes such as (D2-F1(BC3F4-1); D2-F14(BC3F4-75). These lines could be used for evaluation of yield and yield components in the future.