SÀNG LỌC GEN CHỐNG CHỊU MẶN TRÊN BỘ LÚA NGẮN NGÀY Ở GIAI ĐOẠN MẠ
SÀNG LỌC GEN CHỐNG CHỊU MẶN TRÊN BỘ LÚA NGẮN NGÀY Ở GIAI ĐOẠN MẠ
Screening gene tolerant to salinity on the short-term rice in the seedlings stage
Screening 92 high-yielding rice varieties in Cuu Long Delta Rice Research Institute have inbred to evaluate of the response level tolerant to salinity with three different concentrations of salt EC=0 dS/m, 8 dS/m, 15 dS/m can be devided into 3 distinct groups: group of saline tolerant varieties, slightly susceptible varieties and subceptible varieties. The ability to react to salt of varieties is significant difference. However, in view of the growth of the varieties showed: the higher salt concentrations is, the lower survial day is, the percentage of height reduction, the more root length increased, the more dry weight of stems and roots decreased. The indices also closely positive correlated each other. These suggests that the saline conditions greatly affect the survival, growth and development of rice. The varieties are proposed including: Pokkali, OM6677, OM10252, OM6707, OM5629, OM6379, OM5239, OM6832, OM819 DB-1, OM5953, OM819 DB-11, OM5886,... the varieties also tested with molecular markers RM223 and RMSal 1 were recorded with the linkage between genotype and phenotype. The varieties can be tested in may salinity areas be limited from salinity concentration 2-4 ‰