Nguyen Thi Lang, Pham Thi Thu Ha, Nguyen Trong Phuoc and Bui Chi Buu.

SABRAO J. Breed. Genet. 51 (3) on-line August 2019

ABSTRACT

Selection of elite rice cultivars through backcross as well as based on quantitative genetics, and interaction of rice cultivars were evaluated by genetic index at the High Agricultural Technology Research Institute (HATRI) for Mekong Delta, Vietnam. A population was developed from a cross between OM10252 (high yielding variety and short duration from Cuu Long Delta Rice Research Institute (CLRRI) as female parent and Pokkali as male parent (a donor in many breeding programs and salinity tolerance related studies from Indian). Analysis of 95 individuals from the BC3F3 population of OM10252 /Pokkali// OM10252, the plant height trait, root length, dry weight of stem, dried weight of roots had the positive and high correlation with the survival time of rice plants at EC = 0 dS/m, 8 dS/m and 15 dS/m. The line BC3 F4-17 gave good survival at 4‰ condition in different areas. A final comment is that both field management and improved cultural practices were extremely important for sanity in rice. For generations, salt-tolerant lines will continue to grow and will be evaluated in the vegetative and growth stages, and included in breeding programs.

Key words: Salt stress, rice lines, seedling and stages, breeding, Oryza sativa L.

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