{"id":545,"date":"2009-03-02T10:17:56","date_gmt":"2009-03-02T03:17:56","guid":{"rendered":"http:\/\/demo.prc.maiatech.com.vn\/?p=545"},"modified":"2021-11-12T10:30:52","modified_gmt":"2021-11-12T03:30:52","slug":"chon-loc-giong-lua-thom-lt3-tu-nguon-gen-lua-san-co","status":"publish","type":"post","link":"https:\/\/prc.org.vn\/?p=545","title":{"rendered":"Ch\u1ecdn l\u1ecdc gi\u1ed1ng l\u00faa th\u01a1m LT3 t\u1eeb ngu\u1ed3n gen l\u00faa s\u1eb5n c\u00f3"},"content":{"rendered":"\n

I. \u0110\u1eb7t v\u1ea5n \u0111\u1ec1
<\/strong>\u00a0\u00a0\u00a0\u00a0\u00a0 Sau \u0111\u1ed5i m\u1edbi \u0111\u1eddi s\u1ed1ng c\u1ee7a nh\u00e2n d\u00e2n ta \u0111\u00e3 \u0111\u01b0\u1ee3c n\u00e2ng cao r\u00f5 r\u1ec7t, nhu c\u1ea7u v\u1ec1 \u0103n ngon \u0111\u00e3 thay \u0111\u1ed5i cho \u0103n no. K\u1ebft qu\u1ea3 \u0111i\u1ec1u tra cho th\u1ea5y v\u1ec1 c\u01a1m g\u1ea1o, kh\u1ea9u v\u1ecb c\u1ee7a ng\u01b0\u1eddi ti\u00eau d\u00f9ng ng\u00e0y nay \u0111\u00e3 kh\u00e1c x\u01b0a, \u0111\u00f2i h\u1ecfi t\u1eeb g\u1ea1o n\u1edf \u0111\u1ec3 c\u00f3 nhi\u1ec1u c\u01a1m v\u00e0 \u0103n no l\u00e2u sang c\u01a1m d\u1ebbo, m\u1ec1m, g\u1ea1o th\u01a1m c\u00e0ng \u0111\u01b0\u1ee3c ch\u1ea5p nh\u1eadn cao h\u01a1n. Tuy nhi\u00ean m\u1ed9t s\u1ed1 gi\u1ed1ng l\u00faa th\u01a1m, g\u1ea1o d\u1ebbo nh\u1eadp n\u1ed9i t\u1eeb Trung Qu\u1ed1c, \u0110\u00e0i Loan th\u00ec c\u01a1m n\u00e1t v\u00e0 \u01b0\u1edbt n\u00ean kh\u00f4ng h\u1ee3p v\u1edbi kh\u1ea9u v\u1ecb c\u1ee7a ng\u01b0\u1eddi Vi\u1ec7t Nam. G\u1ea1o T\u00e1m th\u01a1m r\u1ea5t ngon \u0111\u01b0\u1ee3c ng\u01b0\u1eddi Vi\u1ec7t Nam \u01b0a th\u00edch r\u1ed9ng r\u00e3i nh\u01b0ng l\u00faa T\u00e1m th\u01a1m ch\u1ec9 tr\u1ed3ng \u0111\u01b0\u1ee3c trong v\u1ee5 M\u00f9a n\u00ean g\u1ea1o kh\u00f4ng ph\u1ed5 bi\u1ebfn quanh n\u0103m (Nguy\u1ec5n Th\u1ecb Qu\u1ef3nh v\u00e0 CTV 2000a, 2000b; Fukuoka v\u00e0 CTV 2000, Nguy\u1ec5n H\u1eefu Ngh\u0129a v\u00e0 CTV 2001). M\u1ed9t s\u1ed1 si\u00eau th\u1ecb \u0111\u00e3 nh\u1eadp g\u1ea1o Th\u00e1i Lan, g\u1ea1o Nh\u1eadt B\u1ea3n v\u1ec1 b\u00e1n cho ng\u01b0\u1eddi ti\u00eau d\u00f9ng th\u00e0nh th\u1ecb v\u1edbi gi\u00e1 t\u1eeb 15.000 \u2013 30.000 \u0111\/kg. N\u1eafm b\u1eaft \u0111\u01b0\u1ee3c nhu c\u1ea7u tr\u00ean, trong giai \u0111o\u1ea1n 1995 \u2013 2000 t\u00e1c gi\u1ea3 \u0111\u00e3 ch\u1ecdn t\u1ea1o ra gi\u1ed1ng l\u00faa th\u01a1m ng\u1eafn ng\u00e0y LT2 (L\u00faa Th\u01a1m s\u1ed1 2) \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c nhu c\u1ea7u ti\u00eau d\u00f9ng hi\u1ec7n t\u1ea1i \u1edf mi\u1ec1n b\u1eafc (B\u1ed9 N\u00f4ng nghi\u1ec7p v\u00e0 PTNT 2005). C\u01a1m g\u1ea1o c\u1ee7a gi\u1ed1ng L\u00faa th\u01a1m LT2 c\u00f3 \u0111\u1eb7c \u0111i\u1ec3m d\u1ebbo nh\u01b0ng kh\u00f4ng d\u00ednh, protein v\u00e0o lo\u1ea1i cao nh\u01b0ng h\u1ea1t c\u01a1m kh\u00f4ng v\u1ee1. \u0110\u1ea7u nh\u1eefng n\u0103m 2000, gi\u1ed1ng l\u00faa LT2 \u0111\u00e3 ph\u00e1t tri\u1ec3n r\u1ed9ng ra h\u1ea7u h\u1ebft c\u00e1c t\u1ec9nh B\u1eafc B\u1ed9 v\u00e0 B\u1eafc Trung B\u1ed9. Song LT2 c\u00f3 m\u1ed9t s\u1ed1 nh\u01b0\u1ee3c \u0111i\u1ec3m nh\u01b0 k\u00e9m ch\u1ecbu n\u00f3ng, y\u1ebfu c\u00e2y d\u1ec5 \u0111\u1ed7 n\u00ean kh\u1ea3 n\u0103ng ch\u1ecbu th\u00e2m canh kh\u00f4ng cao, nh\u1ea5t l\u00e0 \u1edf v\u1ee5 M\u00f9a. Nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y nh\u1eefng nh\u01b0\u1ee3c \u0111i\u1ec3m tr\u00ean c\u1ee7a LT2 c\u00e0ng b\u1ed9c l\u1ed9 r\u00f5 n\u00e9t. Ch\u00fang t\u00f4i ti\u1ebfp t\u1ee5c t\u00ecm ki\u1ebfm th\u00f4ng qua c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ch\u1ecdn gi\u1ed1ng kh\u00e1c nhau nh\u1eefng gi\u1ed1ng l\u00faa th\u01a1m ng\u1eafn ng\u00e0y m\u1edbi c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng c\u01a1m ngon nh\u01b0 LT2 nh\u01b0ng kh\u00f4ng c\u00f3 nh\u1eefng nh\u01b0\u1ee3c \u0111i\u1ec3m \u0111\u00e3 n\u00eau c\u1ee7a LT2, \u0111\u1eb7c bi\u1ec7t l\u00e0 cho n\u0103ng su\u1ea5t cao h\u01a1n trong v\u1ee5 M\u00f9a. Xu\u1ea5t ph\u00e1t t\u1eeb y\u00eau c\u1ea7u n\u00e0y ch\u00fang t\u00f4i \u0111\u00e3 ch\u1ecdn t\u1ea1o ra gi\u1ed1ng l\u00faa th\u01a1m LT3. Trong s\u1ea3n xu\u1ea5t LT3 c\u00f2n c\u00f3 t\u00ean l\u00e0 TH3 (Thi\u00ean H\u01b0\u01a1ng 3).<\/p>\n\n\n\n

II. V\u1eadt li\u1ec7u v\u00e0 ph\u01b0\u01a1ng ph\u00e1p nghi\u00ean c\u1ee9u<\/strong>
– V\u1eadt li\u1ec7u
+ M\u1ed9t s\u1ed1 gi\u1ed1ng l\u00faa th\u01a1m c\u00f3 ngu\u1ed3n g\u1ed1c \u0111\u1ecba ph\u01b0\u01a1ng v\u00e0 nh\u1eadp n\u1ed9i: Qu\u00e1 d\u1ea1 h\u01b0\u01a1ng, B\u1eafc th\u01a1m s\u1ed1 7, Vi\u1ec7t h\u01b0\u01a1ng chi\u00eam, H\u01b0\u01a1ng chi\u00eam, VD20, VD10.
+ Gi\u1ed1ng \u0111\u1ed1i ch\u1ee9ng l\u00e0 LT2.
– Ph\u01b0\u01a1ng ph\u00e1p v\u00e0 th\u1eddi gian
+ D\u00f9ng \u00e1p l\u1ef1c nhi\u1ec7t \u0111\u1ed9 th\u1ea5p \u0111\u1ec3 t\u1ea1o ra bi\u1ebfn d\u1ecb. Sau \u0111\u00f3 c\u1ed1 \u0111\u1ecbnh v\u00e0 t\u00e1ch bi\u1ebfn d\u1ecb b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p ch\u1ecdn ph\u1ea3 h\u1ec7. Th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh t\u1eeb n\u0103m 1997. T\u1eeb nh\u1eefng bi\u1ebfn d\u1ecb \u0111\u00f3 ch\u1ecdn ra LT3 \u0111\u01b0\u1ee3c t\u00e1ch t\u1eeb gi\u1ed1ng H\u01b0\u01a1ng Chi\u00eam, m\u1ed9t gi\u1ed1ng l\u00faa c\u00f3 ngu\u1ed3n g\u1ed1c Trung Qu\u1ed1c nh\u01b0ng \u0111\u01b0\u1ee3c thu th\u1eadp t\u1ea1i B\u1eafc H\u00e0, L\u00e0o Cai n\u0103m 1996.
+ Th\u00ed nghi\u1ec7m so s\u00e1nh gi\u1ed1ng: So s\u00e1nh LT3 v\u1edbi gi\u1ed1ng g\u1ed1c H\u01b0\u01a1ng Chi\u00eam v\u00e0 gi\u1ed1ng \u0111\u1ed1i ch\u1ee9ng LT2. Th\u00ed nghi\u1ec7m b\u1ed1 tr\u00ed theo kh\u1ed1i ng\u1eabu nhi\u00ean, ba l\u1ea7n nh\u1eafc l\u1ea1i, di\u1ec7n t\u00edch \u00f4 th\u00ed nghi\u1ec7m 20 m2. Ti\u1ebfn h\u00e0nh trong c\u00e1c v\u1ee5 Xu\u00e2n mu\u1ed9n v\u00e0 M\u00f9a s\u1edbm c\u1ee7a hai n\u0103m 2001 v\u00e0 2002. Ph\u00e2n b\u00f3n: 10 t\u1ea5n ph\u00e2n chu\u1ed3ng, 70kg N, 70kg K20 v\u00e0 60kgP205 cho 1 ha. M\u1eadt \u0111\u1ed9 c\u00e2y 50 kh\u00f3m\/m2. S\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p ph\u00e2n t\u00edch ph\u01b0\u01a1ng sai m\u1ed9t nh\u00e2n t\u1ed1 \u0111\u1ec3 x\u1eed l\u00fd s\u1ed1 li\u1ec7u th\u00ed nghi\u1ec7m.
+ Kh\u1ea3 n\u0103ng kh\u00e1ng s\u00e2u b\u1ec7nh v\u00e0 ch\u1ecbu sinh th\u00e1i kh\u00f4ng thu\u1eadn l\u1ee3i: \u0110\u00e1nh gi\u00e1 tr\u00ean \u0111\u1ed3ng ru\u1ed9ng (t\u00ednh kh\u00e1ng ngang) theo ph\u01b0\u01a1ng ph\u00e1p c\u1ee7a IRRI, t\u00e1c gi\u1ea3 t\u1ef1 \u0111\u00e1nh gi\u00e1 c\u00f3 s\u1ef1 tham gia c\u1ee7a n\u00f4ng d\u00e2n. \u0110\u00e1nh gi\u00e1 tr\u00ean th\u00ed nghi\u1ec7m so s\u00e1nh gi\u1ed1ng v\u00e0 kh\u1ea3o nghi\u1ec7m m\u1edf r\u1ed9ng s\u1ea3n xu\u1ea5t trong nhi\u1ec1u v\u1ee5, n\u0103m r\u1ed3i l\u1ea5y k\u1ebft qu\u1ea3 trung b\u00ecnh l\u00e0m k\u1ebft lu\u1eadn. T\u00ednh ch\u1ecbu kh\u00f4ng \u0111\u1ed5 ng\u00e3 \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 tr\u00ean n\u1ec1n ph\u00e2n b\u00f3n 10 kg Ur\u00ea\/s\u00e0o B\u1eafc B\u1ed9.
– \u0110\u1ecba \u0111i\u1ec3m nghi\u00ean c\u1ee9u: M\u1ed9t s\u1ed1 x\u00e3 \u1edf huy\u1ec7n Th\u01b0\u1eddng T\u00edn, H\u00e0 T\u00e2y. B\u1eaft \u0111\u1ea7u t\u1eeb n\u0103m 2003 m\u1ed9t s\u1ed1 th\u00ed nghi\u1ec7m l\u1ecdc d\u00f2ng \u0111\u1ec3 duy tr\u00ec gi\u1ed1ng g\u1ed1c (gi\u1ed1ng t\u00e1c gi\u1ea3), th\u00ed nghi\u1ec7m ph\u00e2n t\u00edch ph\u1ea9m ch\u1ea5t c\u01a1m g\u1ea1o v\u00e0 l\u00e0m ti\u00eau b\u1ea3n ADN c\u1ee7a LT3 \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh t\u1ea1i Trung t\u00e2m T\u00e0i nguy\u00ean di truy\u1ec1n th\u1ef1c v\u1eadt, nay l\u00e0 Trung t\u00e2m T\u00e0i nguy\u00ean th\u1ef1c v\u1eadt, An Kh\u00e1nh, Ho\u00e0i \u0110\u1ee9c, H\u00e0 T\u00e2y.<\/p>\n\n\n\n

III. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u v\u00e0 th\u1ea3o lu\u1eadn<\/strong>
1. Qu\u00e1 tr\u00ecnh ch\u1ecdn l\u1ecdc gi\u1ed1ng l\u00faa LT3
N\u0103m 1996 t\u00e1c gi\u1ea3 thu th\u1eadp gi\u1ed1ng H\u01b0\u01a1ng Chi\u00eam t\u1ea1i B\u1eafc H\u00e0, L\u00e0o Cai. \u0110\u1eb7c t\u00ednh l\u00faa th\u01a1m, ng\u1eafn ng\u00e0y, th\u1ea5p c\u00e2y c\u1ee7a gi\u1ed1ng l\u00faa n\u00e0y thu h\u00fat s\u1ef1 ch\u00fa \u00fd c\u1ee7a t\u00e1c gi\u1ea3 ti\u1ebfp t\u1ee5c \u0111\u1ea7u t\u01b0 nghi\u00ean c\u1ee9u. \u0110\u1ea7u n\u0103m 1997 ti\u1ebfn h\u00e0nh x\u1eed l\u00fd nhi\u1ec7t \u0111\u1ed9 th\u1ea5p 0,5 kg h\u1ea1t gi\u1ed1ng l\u00faa th\u01a1m H\u01b0\u01a1ng Chi\u00eam. H\u1ea1t sau khi x\u1eed l\u00fd \u0111\u01b0\u1ee3c gieo ra ru\u1ed9ng ng\u00e0y 10\/ 01\/ 1997. Quan s\u00e1t th\u1ea5y c\u00f3 nhi\u1ec1u lo\u1ea1i h\u00ecnh bi\u1ebfn d\u1ecb kh\u00e1c nhau trong s\u1ed1 40 c\u00e2y m\u1ecdc. C\u00e1c bi\u1ebfn d\u1ecb c\u00f3 th\u1ec3 chia th\u00e0nh b\u1ed1n nh\u00f3m, k\u1ebft qu\u1ea3 cho th\u1ea5y \u00e1p l\u1ef1c nhi\u1ec7t \u0111\u1ed9 th\u1ea5p \u0111\u00e3 t\u1ea1o n\u00ean c\u00e1c d\u1ea1ng \u0111\u1ed9t bi\u1ebfn kh\u00e1c h\u1eb3n nhau t\u1eeb gi\u1ed1ng g\u1ed1c H\u01b0\u01a1ng Chi\u00eam. Trong b\u1ed1n nh\u00f3m n\u00f3i tr\u00ean, Nh\u00f3m 4 c\u00f3 nhi\u1ec1u \u0111\u1eb7c t\u00ednh \u01b0u vi\u1ec7t h\u01a1n c\u1ea3. Nh\u00f3m 4 n\u00e0y c\u00f2n c\u00f3 m\u1ed9t \u0111\u1eb7c t\u00ednh m\u00e0 c\u1ea3 gi\u1ed1ng g\u1ed1c H\u01b0\u01a1ng Chi\u00eam v\u00e0 ba nh\u00f3m c\u00f2n l\u1ea1i kh\u00f4ng c\u00f3 l\u00e0 v\u00f2i nh\u1ee5y c\u00e1i c\u1ee7a n\u00f3 th\u00f2 ra kh\u1ecfi v\u1ecf hoa l\u00faa \u0111\u1ebfn tr\u00ean 80% chi\u1ec1u d\u00e0i (Xem B\u1ea3ng 2). T\u1eeb c\u00e1c c\u00e1 th\u1ec3 thu\u1ed9c Nh\u00f3m 4 n\u00e0y, \u0111\u00e3 ti\u1ebfn h\u00e0nh ch\u1ecdn ph\u1ea3 h\u1ec7 \u1edf c\u1ea3 v\u1ee5 Xu\u00e2n v\u00e0 v\u1ee5 M\u00f9a t\u1eeb n\u0103m 1998 \u0111\u1ebfn n\u0103m 2000. V\u1ee5 M\u00f9a 2000 ch\u1ecdn \u0111\u01b0\u1ee3c D\u00f2ng s\u1ed1 3 c\u00f3 t\u00ednh di truy\u1ec1n \u1ed5n \u0111\u1ecbnh v\u00e0 c\u00f3 nhi\u1ec1u \u01b0u \u0111i\u1ec3m, \u0111\u1eb7t t\u00ean l\u00e0 LT3.
2. \u0110\u1eb7c t\u00ednh c\u1ee7a gi\u1ed1ng l\u00faa LT3
\u0110\u1eb7c \u0111i\u1ec3m h\u00ecnh th\u00e1i c\u1ee7a LT3 so v\u1edbi gi\u1ed1ng g\u1ed1c H\u01b0\u01a1ng Chi\u00eam c\u00f3 nhi\u1ec1u kh\u00e1c bi\u1ec7t, th\u1ec3 hi\u1ec7n \u1edf B\u1ea3ng 2. Ph\u00e2n t\u00edch k\u1ebft qu\u1ea3 \u1edf B\u1ea3ng n\u00e0y ta th\u1ea5y chi\u1ec1u cao c\u00e2y c\u1ee7a LT3 v\u1eabn gi\u1eef nh\u01b0 gi\u1ed1ng g\u1ed1c H\u01b0\u01a1ng Chi\u00eam, t\u1ee9c l\u00e0 thu\u1ed9c lo\u1ea1i h\u00ecnh th\u1ea5p c\u00e2y. \u0110\u1eb7c \u0111i\u1ec3m l\u00e1 c\u1ee7a H\u01b0\u01a1ng Chi\u00eam chuy\u1ec3n t\u1eeb to b\u1ea3n, m\u00e0u xanh sang nh\u1ecf b\u1ea3n, m\u00e0u xanh v\u00e0ng \u1edf LT3. Do b\u1ea3n l\u00e1 nh\u1ecf n\u00ean LT3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u1ea5y d\u00e0y m\u00e0 l\u00e1 v\u1eabn kh\u00f4ng che c\u1edbm l\u00ean nhau, t\u1eeb \u0111\u00f3 t\u00ednh n\u0103ng quang h\u1ee3p cao h\u01a1n. H\u01b0\u01a1ng Chi\u00eam c\u00f3 kh\u1ea3 n\u0103ng \u0111\u1ebb nh\u00e1nh trung b\u00ecnh trong khi LT3 \u0111\u1ebb nh\u00e1nh nhi\u1ec1u, \u0111\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng y\u1ebfu t\u1ed1 t\u1ea1o n\u00ean n\u0103ng su\u1ea5t cao c\u1ee7a LT3. V\u1ec1 ph\u1ea9m ch\u1ea5t g\u1ea1o, h\u1ea1t g\u1ea1o c\u1ee7a gi\u1ed1ng H\u01b0\u01a1ng Chi\u00eam tr\u1eafng trong trong khi h\u1ea1t g\u1ea1o LT3 m\u00e0u tr\u1eafng \u0111\u1ee5c. M\u1ed9t \u0111\u1eb7c t\u00ednh quan tr\u1ecdng l\u00e0 khi th\u1ee5 ph\u1ea5n, v\u00f2i nh\u1ee5y c\u00e1i c\u1ee7a gi\u1ed1ng LT3 th\u00f2 ra kh\u1ecfi v\u1ecf hoa l\u00faa \u0111\u1ebfn tr\u00ean 80% chi\u1ec1u d\u00e0i trong khi v\u00f2i nh\u1ee5y c\u00e1i c\u1ee7a H\u01b0\u01a1ng Chi\u00eam kh\u00f4ng th\u00f2 ra ngo\u00e0i nh\u01b0 nhi\u1ec1u gi\u1ed1ng l\u00faa kh\u00e1c. Do v\u00f2i nhu\u1ef5 c\u00e1i th\u00f2 ra ngo\u00e0i n\u00ean kh\u1ea3 n\u0103ng giao ph\u1ea5n t\u1ef1 do gi\u1eefa c\u00e1c c\u00e1 th\u1ec3 c\u1ee7a LT3 v\u1edbi nhau v\u00e0 v\u1edbi c\u00e1c gi\u1ed1ng kh\u00e1c cao. \u0110i\u1ec1u n\u00e0y n\u00f3i l\u00ean vi\u1ec7c duy tr\u00ec d\u00f2ng thu\u1ea7n c\u1ee7a LT3 kh\u00f3 h\u01a1n \u0111\u1ed1i v\u1edbi c\u00e1c gi\u1ed1ng l\u00faa th\u00f4ng th\u01b0\u1eddng kh\u00e1c. \u0110\u00e1ng ch\u00fa \u00fd nh\u1ea5t l\u00e0 h\u00e0m l\u01b0\u1ee3ng Amiloza r\u00fat t\u1eeb 20% \u1edf gi\u1ed1ng H\u01b0\u01a1ng Chi\u00eam xu\u1ed1ng c\u00f2n 14% \u1edf gi\u1ed1ng LT3 n\u00ean c\u01a1m c\u1ee7a LT3 m\u1ec1m, th\u00edch h\u1ee3p v\u1edbi th\u1ecb hi\u1ebfu ng\u01b0\u1eddi ti\u00eau d\u00f9ng.
2.1. \u0110\u1eb7c \u0111i\u1ec3m n\u00f4ng sinh h\u1ecdc
M\u1edbi nh\u00ecn b\u1ec1 ngo\u00e0i, \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a hai gi\u1ed1ng LT3 v\u00e0 LT2 g\u1ea7n gi\u1ed1ng nhau, c\u1ee5 th\u1ec3 th\u1eddi gian sinh tr\u01b0\u1edfng ngang nhau (125 \u2013 130 ng\u00e0y \u1edf v\u1ee5 Xu\u00e2n mu\u1ed9n v\u00e0 100 \u2013 105 ng\u00e0y \u1edf v\u1ee5 M\u00f9a), chi\u1ec1u cao c\u00e2y \u0111\u1ec1u t\u1eeb 90 cm \u2013 95 cm, \u0111\u1ed9 tho\u00e1t c\u1ed5 b\u00f4ng nh\u01b0 nhau (tr\u00ean d\u01b0\u1edbi 2,0 cm) m\u00e0u s\u1eafc th\u00e2n l\u00e1 \u0111\u1ec1u xanh v\u00e0ng, d\u1ea1ng h\u1ea1t th\u00f3c thon nh\u01b0 nhau. Tuy nhi\u00ean gi\u1ed1ng LT3 c\u00f3 nh\u1eefng kh\u00e1c bi\u1ec7t c\u01a1 b\u1ea3n so v\u1edbi LT2: kh\u1ea3 n\u0103ng \u0111\u1ebb nh\u00e1nh v\u00e0 s\u1ed1 h\u1ea1t tr\u00ean b\u00f4ng cao h\u01a1n LT2, tr\u1ecdng l\u01b0\u1ee3ng 1000 h\u1ea1t nh\u1ecf h\u01a1n LT2 (xem B\u1ea3ng 3), m\u00e0u s\u1eafc h\u1ea1t th\u00f3c c\u1ee7a LT3 l\u00e0 n\u00e2u nh\u1ea1t trong khi c\u1ee7a LT2 l\u00e0 v\u00e0ng, s\u1ed1 d\u1ea3nh t\u00e1i sinh c\u1ee7a LT3 cao (5-7 d\u1ea3nh\/kh\u00f3m) trong khi LT2 kh\u00f4ng c\u00f3 kh\u1ea3 n\u0103ng t\u00e1i sinh.
2.2. C\u00e1c y\u1ebfu t\u1ed1 t\u1ea1o th\u00e0nh n\u0103ng su\u1ea5t
B\u1ea3ng 3 tr\u00ecnh b\u00e0y c\u00e1c y\u1ebfu t\u1ed1 t\u1ea1o th\u00e0nh n\u0103ng su\u1ea5t v\u00e0 n\u0103ng su\u1ea5t c\u1ee7a hai gi\u1ed1ng LT3 v\u00e0 LT2. \u0110\u00e2y l\u00e0 s\u1ed1 li\u1ec7u l\u1ea5y t\u1eeb th\u00ed nghi\u1ec7m so s\u00e1nh gi\u1ed1ng \u1edf b\u1ed1n v\u1ee5 Xu\u00e2n 2001, M\u00f9a 2001, Xu\u00e2n 2002, M\u00f9a 2002 \u1edf huy\u1ec7n Th\u01b0\u1eddng T\u00edn, H\u00e0 T\u00e2y. Ta th\u1ea5y tr\u1ecdng l\u01b0\u1ee3ng 1000 h\u1ea1t c\u1ee7a LT3 nh\u1ecf h\u01a1n 5% so v\u1edbi LT2. Tuy nhi\u00ean s\u1ed1 b\u00f4ng\/kh\u00f3m c\u1ee7a LT3 v\u00e0 s\u1ed1 h\u1ea1t ch\u1eafc\/b\u00f4ng c\u1ee7a LT3 cao h\u01a1n LT2 tr\u00ean d\u01b0\u1edbi 12%. \u0110\u00e2y l\u00e0 hai y\u1ebfu t\u1ed1 ch\u00ednh t\u1ea1o n\u00ean n\u0103ng su\u1ea5t LT3 cao h\u01a1n LT2, nh\u1ea5t l\u00e0 trong v\u1ee5 M\u00f9a.
2.3. Kh\u1ea3 n\u0103ng kh\u00e1ng s\u00e2u b\u1ec7nh v\u00e0 ch\u1ecbu sinh th\u00e1i kh\u00f4ng thu\u1eadn l\u1ee3i
K\u1ebft qu\u1ea3 \u0111\u00e1nh gi\u00e1 t\u00ednh kh\u00e1ng m\u1ed9t s\u1ed1 lo\u1ea1i s\u00e2u b\u1ec7nh h\u1ea1i ch\u00ednh v\u00e0 ch\u1ecbu m\u1ed9t s\u1ed1 \u0111i\u1ec1u ki\u1ec7n sinh th\u00e1i kh\u00f4ng thu\u1eadn l\u1ee3i tr\u00ean \u0111\u1ed3ng ru\u1ed9ng \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y \u1edf B\u1ea3ng 4.
C\u1ea3 hai gi\u1ed1ng \u0111\u1ec1u kh\u00e1ng \u0110\u1ea1o \u00f4n (\u0111i\u1ec3m 1\/9), kh\u00e1ng v\u1eeba \u0111\u1ed1i v\u1edbi b\u1ec7nh Kh\u00f4 v\u1eb1n (\u0111i\u1ec3m 3\/9 – 4\/9) v\u00e0 R\u1ea7y n\u00e2u (\u0111i\u1ec3m 3\/9). LT3 kh\u00e1ng v\u1edbi B\u1ea1c l\u00e1 (\u0111i\u1ec3m 3\/9) cao h\u01a1n LT2 (\u0111i\u1ec3m 5\/9). C\u1ea3 hai gi\u1ed1ng \u0111\u1ec1u ch\u1ecbu m\u01b0a \u1ea9m l\u00fac n\u1edf hoa v\u00e0 th\u1ee5 ph\u1ea5n (\u0111i\u1ec3m 1\/9), ch\u1ecbu r\u00e9t th\u1eddi k\u1ef3 m\u1ea1 \u1edf m\u1ee9c \u0111\u1ed9 trung b\u00ecnh (\u0111i\u1ec3m 4\/9). \u0110\u1eb7c bi\u1ec7t kh\u1ea3 n\u0103ng ch\u1ecbu ng\u1eadp \u00fang v\u00e0 kh\u00f4ng \u0111\u1ed5 c\u1ee7a LT3 cao h\u01a1n h\u1eb3n so v\u1edbi LT2. C\u1ea3 hai gi\u1ed1ng \u0111\u1ec1u l\u00e0 l\u00faa th\u01a1m nh\u01b0ng \u00edt b\u1ecb chu\u1ed9t ph\u00e1, ph\u00f9 h\u1ee3p v\u1edbi k\u1ebft qu\u1ea3 nhi\u1ec1u nghi\u00ean c\u1ee9u l\u00e0 t\u00ednh th\u01a1m c\u1ee7a l\u00faa g\u1ea1o kh\u00f4ng h\u1ea5p d\u1eabn chu\u1ed9t
2.4. Ph\u1ea9m ch\u1ea5t c\u01a1m g\u1ea1o
M\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m v\u1ec1 ph\u1ea9m ch\u1ea5t g\u1ea1o khi so s\u00e1nh LT3 v\u1edbi LT2 \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y \u1edf B\u1ea3ng 5. Chi\u1ec1u d\u00e0i h\u1ea1t g\u1ea1o c\u1ee7a c\u1ea3 hai gi\u1ed1ng \u0111\u1ec1u thu\u1ed9c lo\u1ea1i trung b\u00ecnh, song do h\u1ea1t g\u1ea1o b\u00e9 n\u00ean m\u1eb7c d\u00f9 chi\u1ec1u d\u00e0i trung b\u00ecnh nh\u01b0ng h\u00ecnh d\u00e1ng h\u1ea1t v\u1eabn thu\u1ed9c lo\u1ea1i thon. M\u00e0u s\u1eafc h\u1ea1t g\u1ea1o c\u1ee7a hai gi\u1ed1ng kh\u00e1c nhau, LT3 tr\u1eafng \u0111\u1ee5c trong khi LT2 tr\u1eafng trong. Nhi\u1ec7t \u0111\u1ed9 ho\u00e1 h\u1ed3 v\u00e0 h\u00e0m l\u01b0\u1ee3ng Amiloza c\u1ee7a hai gi\u1ed1ng ngang nhau. Do h\u00e0m l\u01b0\u1ee3ng Amiloza thu\u1ed9c lo\u1ea1i trung b\u00ecnh (14,0% – 14,1%) n\u00ean c\u1ea3 hai gi\u1ed1ng \u0111\u1ec1u c\u00f3 c\u01a1m m\u1ec1m. LT3 c\u00f3 h\u00e0m l\u01b0\u1ee3ng Protein cao h\u01a1n LT2 (9,0% so v\u1edbi 8,4%) n\u00ean c\u01a1m c\u1ee7a LT3 ngon h\u01a1n.
K\u1ebft qu\u1ea3 \u0111\u00e1nh gi\u00e1 ph\u1ea9m ch\u1ea5t c\u01a1m c\u1ee7a LT3 \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y \u1edf B\u1ea3ng 6. C\u00e1n b\u1ed9 v\u00e0 nh\u00e2n d\u00e2n \u0111\u1ec1u c\u00f3 nh\u1eadn x\u00e9t l\u00e0 c\u01a1m c\u1ee7a LT3 th\u01a1m, d\u1ebbo, ngon. \u0110\u1eb7c bi\u1ec7t trong \u0111\u1ee3t sang th\u0103m Vi\u1ec7t Nam n\u0103m 2002, B\u00ed th\u01b0 T\u1ec9nh u\u1ef7 T\u1ee9 Xuy\u00ean, Trung Qu\u1ed1c sau khi \u0103n c\u01a1m v\u00e0 h\u1ecfi v\u1ec1 \u0111\u1eb7c t\u00ednh gi\u1ed1ng, r\u1ea5t th\u00edch gi\u1ed1ng LT3, \u0111\u00e3 ch\u1ec9 th\u1ecb cho c\u00e1c c\u00e1n b\u1ed9 h\u1eefu quan c\u1ee7a t\u1ec9nh T\u1ee9 Xuy\u00ean, Trung Qu\u1ed1c nh\u1eadp gi\u1ed1ng v\u1ec1 nh\u00e2n v\u00e0 m\u1edf r\u1ed9ng s\u1ea3n xu\u1ea5t t\u1ea1i t\u1ec9nh m\u00ecnh.
3. Th\u00ed nghi\u1ec7m so s\u00e1nh gi\u1ed1ng
T\u1eeb v\u1ee5 Xu\u00e2n 2001 \u0111\u1ebfn v\u1ee5 M\u00f9a 2002 ti\u1ebfn h\u00e0nh b\u1ed1n v\u1ee5 th\u00ed nghi\u1ec7m so s\u00e1nh gi\u1ed1ng LT3 v\u1edbi c\u00e1c gi\u1ed1ng LT2 v\u00e0 H\u01b0\u01a1ng Chi\u00eam, k\u1ebft qu\u1ea3 tr\u00ecnh b\u00e0y \u1edf B\u1ea3ng 7.
Ph\u00e2n t\u00edch k\u1ebft qu\u1ea3 cho th\u1ea5y:
– V\u1ee5 Xu\u00e2n 2001: N\u0103ng su\u1ea5t LT3 h\u01a1n \u0111\u1ed1i ch\u1ee9ng LT2 l\u00e0 1,18 t\u1ea5n\/ha, t\u1ee9c l\u00e0 cao h\u01a1n v\u1edbi \u0111\u1ed9 tin c\u1eady tr\u00ean 99% (sai s\u1ed1 d\u01b0\u1edbi 1%). N\u0103ng su\u1ea5t LT3 h\u01a1n gi\u1ed1ng g\u1ed1c H\u01b0\u01a1ng Chi\u00eam l\u00e0 0,90 t\u1ea5n\/ha, t\u1ee9c l\u00e0 c\u0169ng h\u01a1n v\u1edbi \u0111\u1ed9 tin c\u1eady tr\u00ean 99%. Hai gi\u1ed1ng LT2 v\u00e0 H\u01b0\u01a1ng Chi\u00eam n\u0103ng su\u1ea5t ngang nhau (h\u01a1n nhau kh\u00f4ng c\u00f3 ngh\u0129a).
– V\u1ee5 M\u00f9a 2001: N\u0103ng su\u1ea5t LT3 h\u01a1n \u0111\u1ed1i ch\u1ee9ng l\u00e0 0,67 t\u1ea5n\/ha, t\u1ee9c l\u00e0 cao h\u01a1n v\u1edbi \u0111\u1ed9 tin c\u1eady 99%. So v\u1edbi gi\u1ed1ng g\u1ed1c H\u01b0\u01a1ng Chi\u00eam, n\u0103ng su\u1ea5t c\u1ee7a LT3 cao h\u01a1n l\u00e0 1,10 t\u1ea5n\/ha, c\u0169ng cao h\u01a1n v\u1edbi \u0111\u1ed9 tin c\u1eady tr\u00ean 99%. Gi\u1ed1ng LT2 n\u0103ng su\u1ea5t h\u01a1n so v\u1edbi gi\u1ed1ng H\u01b0\u01a1ng Chi\u00eam l\u00e0 0,43 t\u1ea5n\/ha, h\u01a1n v\u1edbi \u0111\u1ed9 tin c\u1eady 99%.
– V\u1ee5 Xu\u00e2n 2002: N\u0103ng su\u1ea5t LT3 h\u01a1n gi\u1ed1ng \u0111\u1ed1i ch\u1ee9ng 0,63 t\u1ea5n\/ha, h\u01a1n v\u1edbi \u0111\u1ed9 tin c\u1eady 99%. T\u01b0\u01a1ng t\u1ef1, LT3 h\u01a1n gi\u1ed1ng g\u1ed1c l\u00e0 0,70 t\u1ea5n\/ha, c\u0169ng h\u01a1n v\u1edbi \u0111\u1ed9 tin c\u1eady 99%. Hai gi\u1ed1ng LT2 v\u00e0 H\u01b0\u01a1ng Chi\u00eam c\u00f3 n\u0103ng su\u1ea5t ngang nhau.
– V\u1ee5 M\u00f9a 2002: N\u0103ng su\u1ea5t LT3 h\u01a1n gi\u1ed1ng \u0111\u1ed1i ch\u1ee9ng l\u00e0 1,47 t\u1ea5n\/ha, h\u01a1n v\u1edbi \u0111\u1ed9 tin c\u1eady tr\u00ean 99%. \u1edf v\u1ee5 n\u00e0y LT3 c\u00f3 n\u0103ng su\u1ea5t cao h\u01a1n gi\u1ed1ng g\u1ed1c l\u00e0 1,33 t\u1ea5n\/ha, c\u0169ng h\u01a1n v\u1edbi \u0111\u1ed9 tin c\u1eady tr\u00ean 99%. Hai gi\u1ed1ng LT2 v\u00e0 H\u01b0\u01a1ng Chi\u00eam c\u00f3 n\u0103ng su\u1ea5t ngang nhau.
K\u1ebft lu\u1eadn l\u1ea1i ta th\u1ea5y \u1edf c\u1ea3 b\u1ed1n v\u1ee5 th\u00ed nghi\u1ec7m so s\u00e1nh gi\u1ed1ng, n\u0103ng su\u1ea5t c\u1ee7a LT3 \u0111\u1ec1u h\u01a1n gi\u1ed1ng \u0111\u1ed1i ch\u1ee9ng LT2 v\u00e0 gi\u1ed1ng g\u1ed1c H\u01b0\u01a1ng Chi\u00eam v\u1edbi \u0111\u1ed9 tin c\u1eady t\u1eeb 99% tr\u1edf l\u00ean.\u00a0 \u0110i\u1ec1u n\u00e0y n\u00f3i l\u00ean ti\u1ec1m n\u0103ng n\u0103ng su\u1ea5t c\u1ee7a LT3 h\u01a1n h\u1eb3n v\u00e0 h\u01a1n m\u1ed9t c\u00e1ch \u1ed5n \u0111\u1ecbnh so v\u1edbi LT2 v\u00e0 gi\u1ed1ng g\u1ed1c H\u01b0\u01a1ng Chi\u00eam.
4. Kh\u1ea3o nghi\u1ec7m s\u1ea3n xu\u1ea5t gi\u1ed1ng l\u00faa LT3
Ng\u00e0y 24\/ 06 \/ 2007 U\u1ef7 ban nh\u00e2n d\u00e2n Huy\u1ec7n L\u01b0\u01a1ng S\u01a1n, Ho\u00e0 B\u00ecnh \u0111\u00e3 t\u1ed5 ch\u1ee9c h\u1ed9i ngh\u1ecb \u0111\u1ea7u b\u1edd v\u1ec1 gi\u1ed1ng l\u00faa LT3 trong v\u1ee5 Xu\u00e2n v\u00e0 ch\u1ee7 tr\u01b0\u01a1ng ph\u00e1t tri\u1ec3n gi\u1ed1ng LT3 th\u00e0nh gi\u1ed1ng l\u00faa ch\u1ee7 l\u1ef1c c\u1ee7a huy\u1ec7n cho c\u1ea3 v\u1ee5 Xu\u00e2n v\u00e0 v\u1ee5 M\u00f9a trong nh\u1eefng n\u0103m t\u1edbi.
T\u1eeb n\u0103m 2001 sau khi \u0111\u01b0\u1ee3c ti\u1ebfp c\u1eadn v\u1edbi gi\u1ed1ng l\u00faa th\u01a1m LT3, nh\u00e2n d\u00e2n m\u1ed9t s\u1ed1 th\u00f4n, x\u00e3 thu\u1ed9c huy\u1ec7n Th\u01b0\u1eddng T\u00edn, H\u00e0 T\u00e2y \u0111\u00e3 ch\u1ee7 \u0111\u1ed9ng l\u1ea5y gi\u1ed1ng v\u1ec1 c\u1ea5y th\u1eed v\u00e0 sau \u0111\u00f3 m\u1edf r\u1ed9ng s\u1ea3n xu\u1ea5t tr\u00ean \u0111\u1ed3ng ru\u1ed9ng c\u1ee7a m\u00ecnh. Sau khi tr\u1ef1c ti\u1ebfp tham quan th\u00ed nghi\u1ec7m so s\u00e1nh gi\u1ed1ng v\u00e0 c\u00f9ng t\u00e1c gi\u1ea3 \u0111\u00e1nh gi\u00e1 gi\u1ed1ng tr\u00ean m\u1ed9t s\u1ed1 ru\u1ed9ng s\u1ea3n xu\u1ea5t th\u1eed, c\u00e1n b\u1ed9 v\u00e0 n\u00f4ng d\u00e2n c\u00e1c \u0111\u1ecba ph\u01b0\u01a1ng m\u1ed9t s\u1ed1 t\u1ec9nh kh\u00e1c l\u1ea5y gi\u1ed1ng v\u1ec1 m\u1edf r\u1ed9ng s\u1ea3n xu\u1ea5t \u1edf \u0111\u1ecba ph\u01b0\u01a1ng m\u00ecnh. C\u00e1c \u0111\u1ecba ph\u01b0\u01a1ng \u0111\u1ec1u nh\u1eadn th\u1ea5y LT3 c\u00f3 n\u0103ng su\u1ea5t cao h\u01a1n c\u00e1c gi\u1ed1ng LT2 v\u00e0 B\u1eafc th\u01a1m s\u1ed1 7, kh\u00e1ng b\u1ec7nh B\u1ea1c l\u00e1 h\u01a1n LT2, kh\u00e1ng b\u1ec7nh B\u1ea1c l\u00e1 v\u00e0 c\u01a1m ngon h\u01a1n B\u1eafc th\u01a1m s\u1ed1 7. Do trong s\u1ea3n xu\u1ea5t LT3 c\u00f2n c\u00f3 t\u00ean l\u00e0 TH3 n\u00ean b\u00e0 con n\u00f4ng d\u00e2n th\u01b0\u1eddng g\u1ecdi LT3 b\u1eb1ng t\u00ean chung l\u00e0 l\u00faa th\u01a1m. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn ch\u01b0a c\u00f3 th\u1ed1ng k\u00ea \u0111\u1ea7y \u0111\u1ee7 di\u1ec7n t\u00edch c\u1ee7a LT3 trong s\u1ea3n xu\u1ea5t. Tuy nhi\u00ean c\u00f3 th\u1ec3 kh\u1eb3ng \u0111\u1ecbnh hi\u1ec7n nay LT3 \u0111\u01b0\u1ee3c gieo c\u1ea5y tr\u00ean di\u1ec7n t\u00edch h\u01a1n 7.000 ha ch\u1ee7 y\u1ebfu \u1edf m\u1ed9t s\u1ed1 t\u1ec9nh B\u1eafc B\u1ed9, ngo\u00e0i ra c\u00f2n m\u1ed9t s\u1ed1 \u0111\u1ecba ph\u01b0\u01a1ng \u1edf B\u1eafc Trung B\u1ed9.
5. Hi\u1ec7u qu\u1ea3 kinh t\u1ebf c\u1ee7a gi\u1ed1ng l\u00faa LT3
Do ph\u1ea9m ch\u1ea5t g\u1ea1o ngon \u0111\u01b0\u1ee3c nh\u00e2n d\u00e2n \u01b0a chu\u1ed9ng r\u1ed9ng r\u00e3i n\u00ean gi\u00e1 th\u00f3c g\u1ea1o c\u1ee7a LT3 th\u01b0\u1eddng g\u1ea5p r\u01b0\u1ee1i tr\u1edf l\u00ean so v\u1edbi c\u00e1c gi\u1ed1ng l\u00faa th\u00f4ng th\u01b0\u1eddng kh\u00e1c. B\u1ea3ng 9 tr\u00ecnh b\u00e0y s\u1ef1 so s\u00e1nh hi\u1ec7u qu\u1ea3 kinh t\u1ebf c\u1ee7a LT3 v\u1edbi l\u00faa lai trong v\u1ee5 Xu\u00e2n v\u00e0 v\u1edbi gi\u1ed1ng l\u00faa thu\u1ea7n Khang D\u00e2n 18 trong v\u1ee5 M\u00f9a. K\u1ebft qu\u1ea3 cho th\u1ea5y trong v\u1ee5 Xu\u00e2n, m\u1ed9t s\u00e0o B\u1eafc B\u1ed9 tr\u1ed3ng LT3 \u0111\u01b0a l\u1ea1i thu nh\u1eadp cao h\u01a1n tr\u1ed3ng l\u00faa lai l\u00e0 140.000 \u0111, ch\u01b0a k\u1ec3 chi ph\u00ed s\u1ea3n xu\u1ea5t tr\u1ed3ng LT3 th\u1ea5p h\u01a1n nhi\u1ec1u so v\u1edbi tr\u1ed3ng l\u00faa lai. Trong v\u1ee5 M\u00f9a m\u1ed9t s\u00e0o B\u1eafc B\u1ed9 tr\u1ed3ng LT3 \u0111\u01b0a l\u1ea1i thu nh\u1eadp cao h\u01a1n tr\u1ed3ng gi\u1ed1ng Khang D\u00e2n 18 l\u00e0 135.000 \u0111.<\/p>\n\n\n\n

IV- K\u1ebft lu\u1eadn v\u00e0 \u0111\u1ec1 ngh\u1ecb
<\/strong>1. K\u1ebft lu\u1eadn
– LT3 l\u00e0 gi\u1ed1ng l\u00faa th\u01a1m c\u00f3 c\u00e1c \u0111\u1eb7c t\u00ednh \u01b0u vi\u1ec7t ng\u1eafn ng\u00e0y, ch\u1ea5t l\u01b0\u1ee3ng c\u01a1m g\u1ea1o cao th\u00edch h\u1ee3p v\u1edbi kh\u1ea9u v\u1ecb ng\u01b0\u1eddi Vi\u1ec7t Nam nh\u01b0 Gi\u1ed1ng LT2. LT3 l\u00e0 gi\u1ed1ng c\u00f3 h\u00e0m l\u01b0\u1ee3ng protein cao h\u01a1n n\u00ean c\u01a1m ngon, \u0111\u1eadm h\u01a1n LT2.
– So v\u1edbi LT2, LT3 \u0111\u1ebb nh\u00e1nh kho\u1ebb h\u01a1n, b\u00f4ng to h\u01a1n v\u00e0 ch\u1ecbu th\u00e2m canh h\u01a1n n\u00ean ti\u1ec1m n\u0103ng n\u0103ng su\u1ea5t cao h\u01a1n; kh\u00e1ng b\u1ec7nh B\u1ea1c l\u00e1 trong v\u1ee5 M\u00f9a cao h\u01a1n.
– LT3 th\u00edch h\u1ee3p cho v\u1ee5 Xu\u00e2n, \u0111\u1eb7c bi\u1ec7t cho v\u1ee5 M\u00f9a \u1edf B\u1eafc B\u1ed9 v\u00e0 B\u1eafc Trung B\u1ed9.
2. \u0110\u1ec1 ngh\u1ecb
– C\u00f4ng nh\u1eadn t\u1ea1m th\u1eddi gi\u1ed1ng LT3 \u0111\u1ec3 \u0111a d\u1ea1ng ho\u00e1 ngu\u1ed3n gen l\u00faa th\u01a1m trong s\u1ea3n xu\u1ea5t c\u1ea3 trong v\u1ee5 Xu\u00e2n v\u00e0 v\u1ee5 M\u00f9a \u1edf B\u1eafc B\u1ed9 v\u00e0 B\u1eafc Trung B\u1ed9.
– Ti\u1ebfp t\u1ee5c cho kh\u1ea3o nghi\u1ec7m tr\u00ean di\u1ec7n r\u1ed9ng LT3 \u1edf nh\u1eefng v\u00f9ng sinh th\u00e1i kh\u00f3 kh\u0103n.<\/p>\n\n\n\n

T\u00e0i li\u1ec7u tham kh\u1ea3o<\/strong>
1. Nguy\u1ec5n Th\u1ecb Qu\u1ef3nh, L\u01b0u Ng\u1ecdc Tr\u00ecnh, Nguy\u1ec5n Huy Ho\u00e0ng, 2000a. \u0110a d\u1ea1ng di truy\u1ec1n c\u00e1c t\u00ednh tr\u1ea1ng h\u1ea1t c\u1ee7a qu\u1ef9 gen l\u00faa \u0111\u1ecba ph\u01b0\u01a1ng v\u00f9ng T\u00e2y B\u1eafc Vi\u1ec7t Nam. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u khoa h\u1ecdc, quy\u1ec3n 4. Vi\u1ec7n Khoa h\u1ecdc k\u1ef9 thu\u1eadt n\u00f4ng nghi\u1ec7p Vi\u1ec7t Nam, Tr. 8-11, NXB N\u00f4ng nghi\u1ec7p.
2. Nguy\u1ec5n Th\u1ecb Qu\u1ef3nh, L\u01b0u Ng\u1ecdc Tr\u00ecnh, Nguy\u1ec5n Huy Ho\u00e0ng, 2000b. Ph\u00e2n lo\u1ea1i d\u01b0\u1edbi lo\u00e0i qu\u1ef9 gen l\u00faa n\u01b0\u01a1ng v\u00e0 l\u00faa ru\u1ed9ng v\u00f9ng T\u00e2y B\u1eafc Vi\u1ec7t Nam. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u khoa h\u1ecdc, quy\u1ec3n 4. Vi\u1ec7n Khoa h\u1ecdc k\u1ef9 thu\u1eadt n\u00f4ng nghi\u1ec7p Vi\u1ec7t Nam, Tr. 5-7, NXB N\u00f4ng nghi\u1ec7p.
3. Fukuoka S, Tran Danh Suu, Luu Ngoc Trinh, Tsukasa Nagamine, Kazutoshi Okuno, 2000. Spatial and Temporal Aspect of Genetic Variation in Landraces of Aromatic Rice in Red River Delta, Vietnam Revealed by RAPD Markers. In: Proceeding of the 7th MAFF International Workshop on Genetic Resources, Part 2. In-situ Conservation Research, p. 187 – 199, AFFRC and NIAR, Japan.
4. Nguyen Huu Nghia, Bui Chi Buu, Luu Ngoc Trinh and Le Vinh Thao, 2001. Specialty Rices in Vietnam: Breeding, Production, and Marketing. In: Specialty Rices of the World: Breeding, Production and Marketing, p. 175 – 189. Chaudhary R.C. and Tran D.V. Science Publishers, Incorporeted, FAO Rome, Italy.
5. B\u1ed9 N\u00f4ng nghi\u1ec7p v\u00e0 PTNT, 2005. 575 gi\u1ed1ng c\u00e2y tr\u1ed3ng n\u00f4ng nghi\u1ec7p m\u1edbi. NXB N\u00f4ng nghi\u1ec7p, H\u00e0 N\u1ed9i. <\/p>\n\n\n\n

Nguy\u1ec5n Ph\u1ee5 Chu, L\u01b0u Ng\u1ecdc Tr\u00ecnh<\/p>\n\n\n\n

<\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"excerpt":{"rendered":"

I. \u0110\u1eb7t v\u1ea5n \u0111\u1ec1\u00a0\u00a0\u00a0\u00a0\u00a0 Sau \u0111\u1ed5i m\u1edbi \u0111\u1eddi s\u1ed1ng c\u1ee7a nh\u00e2n d\u00e2n ta \u0111\u00e3 \u0111\u01b0\u1ee3c n\u00e2ng cao r\u00f5 r\u1ec7t, nhu<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[47],"tags":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/prc.org.vn\/index.php?rest_route=\/wp\/v2\/posts\/545"}],"collection":[{"href":"https:\/\/prc.org.vn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prc.org.vn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prc.org.vn\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/prc.org.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=545"}],"version-history":[{"count":2,"href":"https:\/\/prc.org.vn\/index.php?rest_route=\/wp\/v2\/posts\/545\/revisions"}],"predecessor-version":[{"id":3279,"href":"https:\/\/prc.org.vn\/index.php?rest_route=\/wp\/v2\/posts\/545\/revisions\/3279"}],"wp:attachment":[{"href":"https:\/\/prc.org.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=545"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prc.org.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=545"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prc.org.vn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=545"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}