Received: 15-01-2016 / Accepted: 10-09-2016
TBR225 rice variety wasselected from K2/TBR27 cross since 2006 Autumn cropping season. The parentalvarieties K2 and TBR27 were selected from working collection of Thaibinh Seed introducedfrom China. Pedigree selection was made continuously from F2 to F5 and perspective uniform line was named NC7. NC7 line possessedvarious valuable characters such as short growing duration, good plant type, high disease resistance, high yielding potential, long grainwith whiteness and translucence, low amylose content, andgood taste quality. After a series of replicated yield trials at thebreeding nursery of Thaibinh Seed, NC7 proved to be promising line and was named TBR225. TBR225 was evaluated/tested forDUS and VCU test by National Center for Plant Products and Fertilizers inorthern and central regions of Vietnam since 2012 Autumn season. The average grain yield of TBR225 ranged from 6.5 to 7.5 tons/ha, 3.76 - 11.44% higher than the check variety,KD18 and 4.87 - 15.67% higher than Huong thom1.TBR225 was prelimarily approved for production trial according to the DecisionNo.458/QĐ-TT-CLT datedNovember 08, 2013 and officially recognized as ntional variety according to the Decision No.202/QĐ-TT-CLT dated June 09, 2015.