5. KET QUA TH^rc HIEN
5.1.2 Thu thdp mdu lua Nanh Chdn
- Thu thap thdng tin thir d p , so d p : Thdng tin vl ngudn gdc gidng, ljch sir san xult liia Nanh Chdn va co cau gidng lua hien tai (cdn san xult lua miia dja phuong). Tren co sd cac thdng tin thu nhap, cac td cdng tac thuc hien dl tai da khao sat thuc dja cac vimg trdng lua dja phuong tai Ba Rja-Vung Tau, TP.HCM, Ddng Nai, Tly Ninh, Long An va Bin Tre trong khoang thdi gian tir thang 10-12 nam 2005.
- Khao sat, thu thap mlu gidng ngoai san xult
+ Td cdng tac khao sat thuc dja da din cac huyen trong tinh Ba Rja-Vung Tau va cac viing trdng liia miia d TP.HCM, Ddng Nai, Tay Ninh, Long An, Bin Tre va xac djnh khdng cd dau hieu gidng liia can thu thap (Nanh Chdn) cdn tdn tai trong san xuat. Tai cac dja phuong tren cac gidng liia miia cdn trdng rai rac la Nang Thom Chg Dao, Tau Huong, Nang Huong, Nhd Sdm, Thom Sdm, Tieu Ddi, Tring Tep, Mdng Chim, Huyet Rdng va mdt sd gidng nep. C) Ba Rja-Vung Tau cd cac gidng Nang Thom Long Dat, Trang Tep, Mahsuri, Khao Dawk Mali.
+ Da phan cac lao ndng tmdc day xac nhan da timg trdng gidng liia Nanh Chdn deu khdng md ta dugc dac diem gidng, cac nhan xet chung la: day la gidng dac biet ngon com nhung nang suat thap, nhiem ray, than hoi xde, ra yeu; hat lua nhd, vd thdc dudi hat keo dai, hoi nhgn va cong (quat dudi).
- Khao sat, thu thap mau gidng tir ngan hang gen: dua tren cac mdi quan he va hgp tac song phuong trong va ngoai nude trong trao ddi va khai thac ngudn gen gidng cay trdng, de tai da thu thap dugc 7 mau gidng va nhan dugc 1000 ddng liia cd ten ggi la Nanh Chdn tir cac don vj nghien ciiu, trong dd gdm:
+ 540 ddng tir ngan hang gen cua Vien KHKTNNMN (VN) tir 3 mlu gidng + 320 ddng tir ngan hang gen ciia Vien Liia DBSCL (VL) tir 2 mlu gidng
+ 140 ddng tir ngan hang gen ciia Vien Nghien ciru Liia Qudc te (IRRI) tir 2 mau gidng