Screening rice for salinity tolerance by phenotypic in population om1490/pokkali//om1490 cross at seedling stage

Nguyen Thi Lang., Le Quang Loc., Pham Thi Thu Ha., Bui Phuoc Tam and Bui Chi Buu

Breeding for salinity tolerance in rice requires dependable screening techniques. A population was developed from a cross between OM1490 (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). Introgression from Pokkali variety into the hybrid population was recorded with 12,90% recognition for salinity tolerant gene at the survival level of rice plant in salt concentration of EC=8DS/m and 4,30% of survival rice plant at the concentration of EC=15 dS/m. Analysis of 95 individuals from the BC3F3 population of OM1490/Pokkali//OM1490 cross, the 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 = 0,8 and 15 dS/m. This demonstrates the expression of traits affecting closely when analyzing the resistant varieties with various salt concentrations. Through BC3F3 generation, the salt tolerant lines will continue to grow to be evaluated at the vegetative and growth stages, and be taken into breeding programs.

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