{"id":8576,"date":"2009-03-24T02:17:32","date_gmt":"2009-03-23T19:17:32","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/2009\/03\/dac-tinh-lai-xa-tram-uc-melaleuca-leucadendra-va-tram-cu-melaleuca-cajuputi-ket-qua-trong-giai-doan-vuon-uom\/"},"modified":"2019-09-25T10:24:21","modified_gmt":"2019-09-25T03:24:21","slug":"dac-tinh-lai-xa-tram-uc-melaleuca-leucadendra-va-tram-cu-melaleuca-cajuputi-ket-qua-trong-giai-doan-vuon-uom","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/dac-tinh-lai-xa-tram-uc-melaleuca-leucadendra-va-tram-cu-melaleuca-cajuputi-ket-qua-trong-giai-doan-vuon-uom\/","title":{"rendered":"\u0110\u1eb7c t\u00ednh lai xa Tr\u00e0m \u00dac (Melaleuca leucadendra) V\u00e0 Tr\u00e0m C\u1eeb (Melaleuca cajuputi) – K\u1ebfT qu\u1ea3 trong giai \u0111o\u1ea1n v\u01b0\u1eddn \u01b0\u01a1m"},"content":{"rendered":"

Th\u00e1i Th\u00e0nh L\u01b0\u1ee3m<\/em><\/strong><\/p>\n

S\u1edf N\u00f4ng nghi\u1ec7p v\u00e0 PTNT Ki\u00ean Giang<\/em><\/p>\n

Di truy\u1ec1n h\u1ecdc th\u1ef1c v\u1eadt ph\u00e1t huy \u1ee9ng d\u1ee5ng \u0111\u1ea7u ti\u00ean l\u00e0 khoa h\u1ecdc di truy\u1ec1n v\u1ec1 ch\u1ecdn gi\u1ed1ng, t\u1eeb xa x\u01b0a ng\u01b0\u1eddi ta \u0111\u00e3 ch\u1ecdn nh\u1eefng c\u00e2y tr\u1ed3ng q\u00fai v\u00e0 c\u00f3 nhi\u1ec1u th\u00e0nh t\u1ef1u khoa h\u1ecdc tr\u00ean l\u0129nh v\u1ef1c n\u00e0y. <\/em>K\u1ebft qu\u1ea3 cho th\u1ea5y hi\u1ec7n t\u01b0\u1ee3ng c\u00e1c c\u01a1 th\u1ec3 lai F1 kh\u1ecfe h\u01a1n b\u1ed1 m\u1eb9, sinh tr\u01b0\u1edfng v\u00e0 ph\u00e1t tri\u1ec3n nhanh, ch\u1ed1ng ch\u1ecbu v\u1edbi nh\u1eefng \u0111i\u1ec1u ki\u1ec7n b\u1ea5t l\u1ee3i c\u1ee7a m\u00f4i tr\u01b0\u1eddng, cho n\u0103ng su\u1ea5t cao,\u0111\u1ea1t \u0111\u01b0\u1ee3c ph\u1ea9m ch\u1ea5t t\u1ed1t. \u0110\u1eb7c bi\u1ec7t trong tr\u01b0\u1eddng h\u1ee3p lai xa, s\u1ef1kh\u00e1c nhau gi\u1eefa b\u1ed1 v\u00e0 m\u1eb9 r\u1ea5t l\u1edbn n\u00ean n\u1ebfu th\u00e0nh c\u00f4ng th\u00ec s\u1ee9c s\u1ed1ng c\u1ee7a c\u01a1th\u1ec3 lai r\u1ea5t cao. Lai xa l\u00e0 lai kh\u00e1c lo\u00e0i c\u00f3 th\u1ec3 t\u1ea1on\u00ean nh\u1eefng bi\u1ebfn d\u1ecb c\u00f3 l\u1ee3i, gi\u00fapcho t\u0103ng n\u0103ng su\u1ea5t c\u00e2y tr\u1ed3ng, n\u00e2ng cao ph\u1ea9m ch\u1ea5t h\u00e0ng ho\u00e1, h\u1ea1 gi\u00e1 th\u00e0nh s\u1ea3n ph\u1ea9m. \u1edf \u0111\u1ed3ng b\u1eb1ng s\u00f4ng C\u1eedu Long c\u00f3 r\u1eebng tr\u00e0m l\u00e0 r\u1eebng \u0111i\u1ec3n h\u00ecnh ng\u1eadp n\u01b0\u1edbc theo m\u00f9a c\u00e2y thu\u1ea7n lo\u1ea1i l\u00e0 tr\u00e0m c\u1eeb (Melaleuca cajuputi)- <\/em>lo\u00e0i c\u00e2y ph\u00e2n b\u1ed1 r\u1ed9ng trong v\u00f9ng \u0110\u00f4ng Nam ch\u00e2u \u00e1v\u00e0 c\u00e2y tr\u00e0m \u00fac (Melaleuca leucadendra)- <\/em>lo\u00e0i c\u00e2y ph\u00e2n b\u1ed1 r\u1ed9ng trong v\u00f9ng B\u1eafc \u00fac m\u1edbi \u0111\u01b0\u1ee3c du nh\u1eadp v\u00e0o n\u01b0\u1edbc ta, 2 lo\u00e0i n\u00e0y c\u00f3 \u0111\u1eb7c \u0111i\u1ec3m sinh th\u00e1i gi\u1ed1ngnhau. <\/em>Tr\u00e0m c\u1eeb b\u1ea3n \u0111\u1ecba c\u00f3 \u01b0u \u0111i\u1ec3m l\u00e0 bi\u00ean \u0111\u1ed9sinh th\u00e1i r\u1ed9ng, ch\u1ecbu \u0111\u01b0\u1ee3c nhi\u1ec1u lo\u1ea1i h\u00ecnh sinh th\u00e1i ph\u00e8n n\u1eb7ng, ng\u1eadp s\u00e2u, nh\u01b0ng h\u1ea1n ch\u1ebf l\u00e0 sinh tr\u01b0\u1edfng ch\u1eadm.Tr\u00e0mnh\u1eadp n\u1ed9i t\u1eeb \u00fac c\u00f3 \u01b0u \u0111i\u1ec3m th\u00e2n cao,th\u1eb3ng, sinhtr\u01b0\u1edfng nhanh v\u00e0 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu \u0111\u01b0\u1ee3c nhi\u1ec1u lo\u1ea1i h\u00ecnh sinh th\u00e1i \u0111\u1ea5t ph\u00e8n, ng\u1eadp s\u00e2u, c\u00f3 t\u00ednh \u0111a d\u1ea1ng sinh h\u1ecdc cao. \u1edf \u00fac, lo\u1ea1i r\u1eebng n\u00e0y c\u0169ng c\u00f3 nhi\u1ec1u lo\u00e0i th\u1ef1c v\u1eadt v\u00e0 th\u1ee7y s\u1ea3n d\u01b0\u1edbi t\u00e1n nh\u01b0 r\u1eebng tr\u00e0m \u1edf n\u01b0\u1edbc ta. V\u00ec v\u1eady, vi\u1ec7c lai xa gi\u1eefa hai lo\u00e0i n\u00e0y nh\u1eb1m ph\u00e1t huy c\u00e1c \u0111\u1eb7c t\u00ednh tr\u1ed9i s\u1ebd c\u00f3 \u00fd ngh\u0129a t\u00ecm ra nh\u1eefng gi\u1ed1ng m\u1edbi c\u00f3 n\u0103ng su\u1ea5t cao \u0111\u1ec3 cung c\u1ea5p gi\u1ed1ng c\u00e2y tr\u1ed3ng r\u1eebng kinh t\u1ebf k\u1ebft h\u1ee3p v\u1edbi ph\u00f2ng h\u1ed9.<\/p>\n

I. PH\u01af\u01a0NG PH\u00e1p NGHi\u00ean C\u1ee9u<\/p>\n

– Ph\u01b0\u01a1ng ph\u00e1p lai: Ph\u00e2n t\u00edch h\u00ecnh th\u00e1i c\u1ea5u tr\u00fac v\u00e0 theo d\u00f5i \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a hoa c\u1ea3 hai lo\u00e0i \u0111\u1ec3 ch\u1ecdnph\u01b0\u01a1ng ph\u00e1p th\u1ee5 ph\u1ea5n nh\u00e2n t\u1ea1o, bao g\u1ed3m c\u1ea3 vi\u1ec7c kh\u1eed \u0111\u1ef1c v\u00e0 th\u1ee5 ph\u1ea5n.<\/p>\n

Ti\u1ebfn h\u00e0nh kh\u1eed nh\u1ecb \u0111\u1ef1c v\u00e0o gi\u1eefa th\u1eddi gian ch\u01b0a ch\u00edn \u0111\u1ebfn khi b\u1eaft \u0111\u1ea7u chuy\u1ec3n sang giai \u0111o\u1ea1n ch\u00edn \u0111\u1ed1i v\u1edbi hoa c\u1ee7a c\u00e2y ch\u1ecdn l\u00e0m c\u00e2y m\u1eb9. Vi\u1ec7c n\u00e0y ph\u1ea3i ch\u1ecdn \u0111\u00fang th\u1eddi \u0111i\u1ec3m. N\u1ebfu ch\u1ecdn s\u1edbm th\u00ec hoa d\u1ec5 b\u1ecb h\u01b0 h\u1ea1i, kh\u00f4ng c\u00f3 kh\u1ea3 n\u0103ng th\u1ee5 ph\u1ea5n; n\u1ebfu ch\u1ecdn tr\u1ec5 th\u1eddi \u0111i\u1ec3m th\u00ec h\u1ea1t ph\u1ea5n s\u1ebd r\u01a1i v\u00e3i v\u00e0 t\u1ef1 th\u1ee5 ph\u1ea5n trong qu\u00e1 tr\u00ecnh kh\u1eed \u0111\u1ef1c. Khi ch\u1ecdn \u0111\u00fang th\u1eddi \u0111i\u1ec3m th\u00ec kh\u1eed \u0111\u1ef1c b\u1eb1ng c\u00e1ch c\u1eaft b\u1ecf c\u1ea9n th\u1eadn to\u00e0n b\u1ed9 nh\u1ecb \u0111\u1ef1c, d\u00f9ng d\u1ee5ng c\u1ee5 kh\u1eed \u0111\u1ef1c c\u00f3 s\u00e1t khu\u1ea9n b\u1eb1ng c\u1ed3n 90% \u0111\u1ec3 c\u1eaft nh\u1eb9 nh\u00e0ng v\u00e0 c\u1ea9n th\u1eadn ch\u1ec9 ch\u1eeba l\u1ea1i nh\u1ee5y c\u00e1i, sau \u0111\u00f3 c\u00e1ch ly v\u1edbi b\u00ean ngo\u00e0i b\u1eb1ng c\u00e1ch b\u1ecdc k\u00edn t\u00fai nh\u1ef1a, sau h\u01a1n 24 gi\u1edd c\u00e1c nh\u1ee5y c\u00e1i b\u1eaft \u0111\u1ea7u ch\u00edn n\u1edf \u0111\u1ebfn giai \u0111o\u1ea1n v\u01b0\u01a1n th\u1eb3ng. Ti\u1ebfp theo l\u1ea5y tr\u00ean c\u00e2y b\u1ed1 kh\u00e1c lo\u00e0i c\u00e1c nh\u1ecb \u0111\u1ef1c \u0111\u00e3 ch\u00edn ho\u00e0n to\u00e0n ch\u1ecdn nh\u1eefng hoa t\u1ed1t tr\u00ean c\u00e2y ch\u1ecdn l\u00e0m c\u00e2y b\u1ed1, ti\u1ebfn h\u00e0nh th\u1ee5 ph\u1ea5n nh\u00e2n t\u1ea1o b\u1eb1ng c\u00e1ch r\u1eafc ph\u1ea5n v\u00e0o \u0111\u1ea7u c\u1ee7a \u00f3ng nh\u1ee5y c\u00e1i nhi\u1ec1u l\u1ea7n, <\/em>sau \u0111\u00f3 bao k\u00edn t\u00fai nh\u1ef1a \u0111\u1ebfn 7ng\u00e0y ng\u0103n kh\u00f4ng cho ph\u1ea5n c\u1ee7a nh\u1ee5y \u0111\u1ef1c r\u01a1i t\u1eeb n\u01a1i kh\u00e1c bay l\u1ea1i, k\u1ec3 c\u1ea3 kh\u00f4ng cho c\u00f4n tr\u00f9ng b\u00f2 l\u00ean nh\u1ee5y v\u1eeba th\u1ee5 ph\u1ea5n.Khi nh\u1ee5y c\u00e1i \u0111\u00e3 ho\u00e0n to\u00e0n h\u00e9o, m\u1edf t\u00fai nh\u1ef1a ra v\u00e0 \u0111\u00e1nh d\u1ea5u c\u00e1c qu\u1ea3 lai \u0111\u1ec3 tr\u00e1nh nh\u1ea7m l\u1eabn sau n\u00e0y v\u00e0 b\u1ea3o v\u1ec7 tr\u00e1i \u0111\u01b0\u1ee3c lai.Sau 6 th\u00e1ng th\u00ec thu h\u00e1i v\u00e0 chu\u1ea9n b\u1ecb h\u1ea1t cho c\u00f4ng vi\u1ec7c gieo c\u00e2y lai.<\/p>\n

– H\u1ea1t lai v\u00e0 h\u1ea1t c\u00e2y b\u1ed1 m\u1eb9 t\u1ef1 th\u1ee5 ph\u1ea5n \u0111\u01b0\u1ee3c gieo trong v\u01b0\u1eddn \u01b0\u01a1m v\u1edbi c\u00f9ng ph\u01b0\u01a1ng ph\u00e1p x\u1eed l\u00fd h\u1ea1t, sau \u0111\u00f3 theo d\u00f5i t\u00ecnh h\u00ecnh sinh tr\u01b0\u1edfng nh\u01b0: chi\u1ec1u cao, chi\u1ec1u d\u00e0i l\u00f3ng c\u00e2y, \u0111\u1ed9 th\u1eb3ng th\u00e2n c\u00e2y, chi\u1ec1u d\u00e0i l\u00e1, b\u1ec1 r\u1ed9ng l\u00e1 tr\u00ean th\u00e2n c\u00e2y con trong c\u00f9ng th\u1eddi gian sinh tr\u01b0\u1edfng.<\/p>\n

– D\u00f9ng ph\u01b0\u01a1ng ph\u00e1p to\u00e1n h\u1ecdc di truy\u1ec1n \u0111\u1ec3 nh\u1eadn x\u00e9t c\u00e1c t\u00ednh tr\u1ea1ng c\u1ee7a c\u00e1c c\u1eb7p alen c\u00f3c\u00e1c giao t\u1eed \u1edfth\u1ebf h\u1ec7 F1. Khi lai hai lo\u00e0i thu\u1ea7n ch\u1ee7ng kh\u00e1c nhau, ta d\u00f9ng hai t\u00ednh tr\u1ea1ng chu\u1ea9n \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 ki\u1ec3u gen gi\u1eefa 2 xu\u1ea5t x\u1ee9 14147a, 14147b c\u1ee7a lo\u00e0i M. leucadendra <\/em>v\u00e0 xu\u1ea5t x\u1ee9 V\u0129nh H\u01b0ng tr\u00e0m c\u1eeb b\u1ea3n \u0111\u1ecba l\u00e0 M.cajuputi. <\/em>K\u1ebft qu\u1ea3 sau khi thu th\u1eadp s\u1ed1 li\u1ec7u hai lo\u00e0i n\u00e0y, ta x\u00e1c \u0111\u1ecbnh c\u00e1c t\u00ednh tr\u1ea1ng v\u00e0 qui \u01b0\u1edbc t\u00ednh tr\u1ea1ng tr\u1ed9i v\u1ec1 sinh tr\u01b0\u1edfng chi\u1ec1u cao l\u00e0 A v\u00e0 a v\u00e0ng\u01b0\u1ee3c l\u1ea1i, t\u00ednh tr\u1ea1ng tr\u1ed9i v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng l\u00e0 B v\u00e0 b v\u00e0 ng\u01b0\u1ee3c l\u1ea1i, t\u1eeb \u0111\u00f3 c\u00e1c t\u00ednh tr\u1ea1ng kh\u00e1c nhau nh\u01b0 sau:<\/p>\n

+ <\/em>Tr\u00e0m \u00fac 14147a c\u00f3 <\/em>t\u00ednh tr\u1ea1ng (th\u00e2n cao, \u0111o\u1ea1n l\u00f3ng d\u00e0i), v\u00e0 t\u00ednh tr\u1ea1ng (l\u00e1r\u1ed9ng v\u00e0 d\u00e0i, \u0111\u1ea7u l\u00e1 nh\u1ecdn h\u00ecnh m\u00e1c).<\/em><\/p>\n

+ <\/em>Tr\u00e0m \u00fac l4147b c\u00f3 t\u00ednh tr\u1ea1ng (th\u00e2n cao, \u0111o\u1ea1n l\u00f3ng d\u00e0i), v\u00e0 t\u00ednh tr\u1ea1ng (l\u00e1 h\u1eb9p v\u00e0 d\u00e0i, \u0111\u1ea7u nh\u1ecdn h\u00ecnh m\u00e1c).<\/p>\n

+ <\/em>Tr\u00e0m V\u0129nh H\u01b0ng c\u00f3 t\u00ednh tr\u1ea1ng (th\u00e2n cao trung b\u00ecnh, \u0111o\u1ea1n l\u00f3ng ng\u1eafn) v\u00e0 t\u00ednh tr\u1ea1ng (l\u00e1 ng\u1eafn v\u00e0 h\u1eb9p, \u0111\u1ea7u l\u00e1 h\u00ecnh t\u00f9).<\/p>\n

D\u00f2ng b\u1ed1 m\u1eb9 k\u00fd hi\u1ec7u nh\u01b0 sau:<\/p>\n

D\u00f2ng b\u1ed1 m\u1eb9 ML1: {M.leucadendra<\/em> (14147 a)}<\/p>\n

D\u00f2ng b\u1ed1 m\u1eb9 MC1: {M.cajuputi<\/em> V\u0129nh H\u01b0ng}<\/p>\n

D\u00f2ng b\u1ed1 m\u1eb9 ML2: {M.leucadendra<\/em> (14147 b)}<\/p>\n

D\u00f2ng b\u1ed1 m\u1eb9 MC2: {M.cajuputi<\/em> H\u00f2n \u0110\u1ea5t}<\/p>\n

Bi\u1ec3u 1. \u0110i\u1ec1u tra \u0111\u1eb7c \u0111i\u1ec3m b\u1ed1, m\u1eb9 c\u1ee7a c\u00e2y lai<\/em><\/p>\n\n\n\n\n\n\n\n
C\u00e2y b\u1ed1 m\u1eb9<\/td>\nChi\u1ec1u d\u00e0i l\u00e1 (cm)<\/td>\nChi\u1ec1u r\u1ed9ng l\u00e1 (cm)<\/td>\nS\u1ed1 g\u00e2n\/ l\u00e1<\/td>\nH\u00ecnh d\u1ea1ng l\u00e1<\/td>\n<\/tr>\n
V\u0129nh H\u01b0ng<\/td>\n8,67<\/td>\n2,77<\/td>\n5 g\u00e2n (3 g\u1ed1c)<\/td>\n\u0110\u1ea7u t\u00f9<\/td>\n<\/tr>\n
14147 (c\u00e2y a)<\/td>\n19,62<\/td>\n1,85<\/td>\n5 g\u00e2n (3 g\u1ed1c)<\/td>\n\u0110\u1ea7u nh\u1ecdn<\/td>\n<\/tr>\n
H\u00f2n \u0110\u1ea5t<\/td>\n8,25<\/td>\n2,35<\/td>\n5 g\u00e2n (3 g\u1ed1c)<\/td>\n\u0110\u1ea7u t\u00f9<\/td>\n<\/tr>\n
14147 (c\u00e2y b)<\/td>\n16,25<\/td>\n2,35<\/td>\n5 g\u00e2n (3 g\u1ed1c)<\/td>\n\u0110\u1ea7u nh\u1ecdn<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

II. K\u1ebfT Q\u1ee7A TH\u00ed NGHI\u1ec7M<\/p>\n

Bi\u1ec3u 2. C\u00e1c t\u00ednh tr\u1ea1ng c\u00e2y lai v\u00e0 c\u00e2y b\u1ed1 m\u1eb9 h\u1eadu th\u1ebf sau 4 th\u00e1ng<\/em><\/p>\n\n\n\n\n\n\n\n\n\n\n\n
Th\u1ee9 t\u1ef1 gi\u1ed1ng<\/td>\nChi\u1ec1u cao c\u00e2y (cm)<\/td>\nChi\u1ec1u d\u00e0i l\u00f3ng (cm)<\/td>\n\u0110\u1ed9 th\u1eb3ng th\u00e2n c\u00e2y<\/td>\nChi\u1ec1u d\u00e0i l\u00e1 (cm)<\/td>\nB\u1ec1 r\u1ed9ng l\u00e1 (cm)<\/td>\n<\/tr>\n
TTH 1<\/td>\n59,75<\/td>\n1,56<\/td>\n4,75<\/td>\n7,41<\/td>\n2,12<\/td>\n<\/tr>\n
TTL1<\/td>\n50,25<\/td>\n1,55<\/td>\n5,00<\/td>\n5,88<\/td>\n1,10<\/td>\n<\/tr>\n
TTL2<\/td>\n66,50<\/td>\n1,69<\/td>\n5,00<\/td>\n7,16<\/td>\n1,20<\/td>\n<\/tr>\n
ML1<\/td>\n41,25<\/td>\n1,25<\/td>\n5,00<\/td>\n7,75<\/td>\n1,52<\/td>\n<\/tr>\n
MC1<\/td>\n37,00<\/td>\n0,88<\/td>\n4,75<\/td>\n4,22<\/td>\n0,85<\/td>\n<\/tr>\n
ML2<\/td>\n43,35<\/td>\n1,55<\/td>\n5,00<\/td>\n7,62<\/td>\n1,28<\/td>\n<\/tr>\n
MC2<\/td>\n40,50<\/td>\n1,21<\/td>\n5,00<\/td>\n4,45<\/td>\n1,01<\/td>\n<\/tr>\n
Test F<\/td>\n<0.001<\/td>\n<0.001<\/td>\n<0.001<\/td>\n<0.001<\/td>\n<0.001<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Nh\u1eadn x\u00e9t c\u00e1c ki\u1ec3u lai c\u1ee7a c\u00e1c t\u1ed5 h\u1ee3p:<\/p>\n

+ <\/em>T\u1ed5 h\u1ee3plai th\u1ee9 nh\u1ea5t: {M. cajuputi<\/em> H\u00f2n \u0111\u1ea5t} x {M.leucadendra<\/em> 14147a} d\u00f2ng lai \u0111\u01b0\u1ee3c k\u00fd hi\u1ec7u TTH1.<\/em><\/p>\n

D\u00f2ng thu\u1ea7n b\u1ed1 m\u1eb9:<\/p>\n

P: (A1A1b1b1) x (a1a1B1B1)<\/p>\n

Giao t\u1eed P: <\/em>A1b1 x a1B1<\/p>\n

F1: thu \u0111\u01b0\u1ee3c con lai d\u1ecb h\u1ee3p t\u1eedA1a1B1b1<\/p>\n

Con lai \u0111\u01b0\u1ee3c k\u00fd hi\u1ec7u TTH1 c\u00f3 ki\u1ec3u gen A1a1B1b1 k\u1ebft q\u1ee7a \u0111\u00e3 thu\u0111\u01b0\u1ee3c 100% c\u00e1c c\u00e2y lai \u0111\u1ec1u mang \u01b0u th\u1ebf sinh tr\u01b0\u1edfng c\u00f3 th\u00e2n cao, l\u00e1 ng\u1eafn r\u1ed9ng, g\u00e2n n\u1ed5i r\u00f5 \u0111\u1ea7u l\u00e1 h\u00ecnh t\u00f9 do t\u00ednh tr\u1ea1ng tr\u1ed9i \u0111\u01b0\u1ee3c bi\u1ec3u hi\u1ec7n \u1edf con lai.<\/p>\n

+ <\/em>T\u1ed5 h\u1ee3p lai th\u1ee9 hai: <\/em>{M.<\/em>leucadendra (14147b)} x { M. cajuputi<\/em> V\u0129nh H\u01b0ng} d\u00f2ng lai k\u00fd hi\u1ec7u TTL1.<\/em><\/p>\n

D\u00f2ng thu\u1ea7n b\u1ed1 me:<\/p>\n

P: (A2A2B2B2 )x (a2 a2 b2b2)<\/p>\n

Giaot\u1eed P: A2B2 x a2 b2<\/p>\n

F1: .A2B2a2b2<\/p>\n

Con lai k\u00fd hi\u1ec7u TTL1 c\u00f3 ki\u1ec3u gen A2B2a2b2sau khi lai thu \u0111\u01b0\u1ee3c 100% c\u00e2y c\u00f3 th\u00e2n cao, l\u00e1 r\u1ed9ng v\u00e0 d\u00e0i, \u0111\u1ea7u l\u00e1 h\u00ecnh m\u00e1c th\u1ec3 hi\u1ec7n s\u1ef1 \u01b0u tr\u1ed9i ho\u00e0n to\u00e0n so v\u1edbi th\u00e2n trung b\u00ecnh – <\/em>l\u00e1 ng\u1eafn h\u1eb9p, g\u00e2n n\u1ed5i r\u00f5, \u0111\u1ea7u h\u00ecnh t\u00f9.<\/em><\/p>\n

+ <\/em>T\u1ed5 h\u1ee3p laith\u1ee9 ba: {M.leucadendra<\/em> (14147a)} x {M.cajuputi<\/em> V\u0129nh H\u01b0ng} d\u00f2ng lai k\u00fd hi\u1ec7u TTL2<\/p>\n

D\u00f2ng thu\u1ea7n b\u1ed1 m\u1eb9:<\/p>\n

P: (A3A3B3B3) x (a3a3b3b3)<\/p>\n

Giao t\u1eed P: A3B3 x a3b3<\/p>\n

Con lai k\u00fd hi\u1ec7u TTL2 c\u00f3 ki\u1ec3u gen A3B3a3b3 k\u1ebft qu\u1ea3 thu \u0111\u01b0\u1ee3c 100% s\u1ed1 c\u00e2y lai th\u00e2n cao – l\u00e1 h\u1eb9p v\u00e0 d\u00e0i, \u0111\u1ea7u l\u00e1 h\u00ecnh m\u00e1c v\u00e0 tr\u1ed9i ho\u00e0n to\u00e0n so v\u1edbi th\u00e2n cao trungb\u00ecnh -l\u00e1 ng\u1eafn h\u1eb9p, g\u00e2n n\u1ed5i r\u00f5, \u0111\u1ea7u h\u00ecnh t\u00f9.<\/em><\/p>\n

C\u00e1c ki\u1ec3u lai tr\u00ean bi\u1ec3u hi\u1ec7n \u1edf (bi\u1ec3u 2) c\u00e1c c\u1eb7p lai c\u00f3 c\u00e1c ch\u1ec9 ti\u00eau sinh tr\u01b0\u1edfng th\u1ec3 hi\u1ec7n t\u00ednh tr\u1ed9i ho\u00e0n to\u00e0n v\u1ec1 chi\u1ec1u cao c\u1ee7a c\u00e2y lai, chi\u1ec1u d\u00e0i \u0111o\u1ea1n l\u00f3ng th\u00e2n c\u00e2y v\u00e0 h\u00ecnh th\u00e1i l\u00e1:<\/p>\n

– V\u1ec1 chi\u1ec1u cao v\u00e0 chi\u1ec1u d\u00e0i l\u00f3ng: c\u00e1c c\u00e2y lai c\u00f3 b\u1ed1l\u00e0 c\u00e2y nh\u1eadp n\u1ed9i sinh tr\u01b0\u1edfng chi\u1ec1u cao v\u01b0\u1ee3t tr\u1ed9i h\u01a1n so v\u1edbi c\u00e2y h\u1eadu th\u1ebf c\u1ee7a b\u1ed1 v\u00e0 m\u1eb9 ch\u00fang.<\/p>\n

K\u1ebft qu\u1ea3 n\u00e0y cho th\u1ea5y vi\u1ec7c lai gi\u1ed1ng gi\u1eefa hai lo\u00e0i tr\u00e0m kh\u00e1c nhau t\u1ea1o ra \u01b0u th\u1ebf lai v\u1ec1 m\u1eb7t sinh tr\u01b0\u1edfng. Kho\u1ea3ng c\u00e1ch gi\u1eefa nh\u1eefng \u0111o\u1ea1n l\u00f3ng c\u0169ng bi\u1ec3u hi\u1ec7n kh\u1ea3 n\u0103ng sinh tr\u01b0\u1edfng c\u1ee7a c\u00e1c c\u00e2y lai c\u00f3 \u0111o\u1ea1n l\u00f3ng d\u00e0i.<\/p>\n

– \u0110\u1ed9 th\u1eb3ng th\u00e2n c\u00e2y bi\u1ec3u hi\u1ec7n \u0111\u1eb7c \u0111i\u1ec3m sinh h\u1ecdc c\u1ee7a lo\u00e0i. Tr\u00e0m c\u1eeb b\u1ea3n \u0111\u1ecba th\u1ec3 hi\u1ec7n th\u00e2n cong, tr\u00e0m \u00fac h\u1ea7u h\u1ebft l\u00e0 th\u00e2n th\u1eb3ng, c\u00e1c c\u00e2y lai c\u00f3 b\u1ed1 l\u00e0 tr\u00e0m \u00fac mang t\u00ednh tr\u1ea1ng tr\u1ed9i c\u1ee7a b\u1ed1 n\u00ean th\u00e2n th\u1eb3ng 100%, c\u00e2y lai c\u00f3 b\u1ed1 l\u00e0 c\u00e2y tr\u00e0m b\u1ea3n \u0111\u1ecba di truy\u1ec1n th\u00e2n cong.<\/em><\/p>\n

– V\u1ec1 h\u00ecnh th\u00e1i l\u00e1 c\u00e1c c\u00e2y lai TTH1, TTL1, TTL2 c\u00f3 h\u00ecnh th\u00e1i trung gian gi\u1eefa hai t\u00ednh tr\u1ea1ng b\u1ed1 v\u00e0 m\u1eb9, nh\u01b0ng t\u00ednh tr\u1ea1ng n\u00e0o tr\u1ed9i th\u00ec \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n \u1edf th\u1ebf h\u1ec7 con lai.<\/p>\n

T\u00ednh to\u00e1n h\u1ec7 s\u1ed1 di truy\u1ec1n c\u00e1c d\u00f2ng lai TTH1 , TTL1, TTL2<\/p>\n

h2<\/sup> = 0,91 h\u1ec7 s\u1ed1 di truy\u1ec1n cao<\/p>\n

Ft\u00ednh = 10,84 > Fb\u1ea3ng = 4,26<\/p>\n

T\u00ednh to\u00e1n h\u1ec7 s\u1ed1 di truy\u1ec1n c\u00e1c d\u00f2ng b\u1ed1 m\u1eb9 ML1, MC1, ML2, MC2<\/p>\n

h2<\/sup> = 0,82 h\u1ec7 s\u1ed1 di truy\u1ec1n h\u01a1i cao<\/p>\n

Ft\u00ednh = 5,48 > Fb\u1ea3ng = 3,49<\/p>\n

Qua c\u00e1c t\u1ed5 h\u1ee3p lai \u0111\u00e3 thu \u0111\u01b0\u1ee3cnh\u1eefng con lai \u01b0u th\u1ebf h\u01a1n b\u1ed1 m\u1eb9 ch\u00fang, t\u1ea1o ra m\u1ed9t th\u1ebf h\u1ec7 d\u1ecb h\u1ee3p t\u1eed t\u1eeb c\u00e2y lai s\u1ebd b\u1ecb ph\u00e2n h\u00f3a \u1edf \u0111\u1eddi F2. Do \u0111\u00f3, vi\u1ec7c nh\u00e2n gi\u1ed1ng c\u1ea7n \u00e1p d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p sinh s\u1ea3n sinh d\u01b0\u1ee1ng (gi\u00e2m c\u00e0nh, chi\u1ebft gh\u00e9p, c\u1ea5y m\u00f4) nh\u1eb1m duy tr\u00ec \u0111\u1eb7c t\u00ednh tr\u1ed9i ho\u00e0n to\u00e0n c\u1ee7a c\u00e2y lai trong c\u00f4ng t\u00e1c gi\u1ed1ng c\u00e2y tr\u1ed3ng.<\/p>\n

III. K\u1ebfT LU\u1eadN<\/p>\n

Tr\u00e0m lai mang t\u00ednh tr\u1ea1ng tr\u1ed9i t\u1eeb di truy\u1ec1n th\u00e2n cao n\u00ean d\u00f9 l\u00e0cha hay m\u1eb9 th\u00e2n cao \u0111\u1ec1u c\u00f3 di truy\u1ec1n cho con l\u00e0 th\u00e2n cao, t\u1eeb \u0111\u00f3 s\u1ebd t\u1ea1o ra r\u1eebng c\u00f3 n\u0103ng su\u1ea5t cao, bi\u1ec3u hi\u1ec7n \u1edf c\u00e1c ch\u1ec9 ti\u00eau sinh tr\u01b0\u1edfng nh\u01b0: sinh tr\u01b0\u1edfng chi\u1ec1u cao, chi\u1ec1u d\u00e0i l\u00f3ng \u0111o\u1ea1n th\u00e2n. C\u00e1c c\u00e2y lai \u0111\u1ec1u c\u00f3 sinh tr\u01b0\u1edfng chi\u1ec1u cao c\u1ea3i thi\u1ec7n so v\u1edbi c\u00e2y h\u1eadu th\u1ebf t\u1eeb b\u1ed1 m\u1eb9 ch\u00fang.<\/p>\n

Tr\u00e0m lai mang t\u00ednh tr\u1ea1ng tr\u1ed9i c\u1ee7a b\u1ed1 v\u00e0 m\u1eb9 t\u1eeb c\u00e1c ch\u1ec9 ti\u00eau h\u00ecnh th\u00e1i v\u00e0 k\u00edch th\u01b0\u1edbc l\u00e1, \u0111\u1ed9 th\u1eb3ng th\u00e2n c\u00e2y bi\u1ec3u hi\u1ec7n \u1edft\u00ednh tr\u1ea1ng n\u00e0o tr\u1ed9i th\u00ec \u0111\u01b0\u1ee3c di truy\u1ec1n cho con.<\/p>\n

C\u00e1c ch\u1ec9 ti\u00eau \u01b0u th\u1ebf lai sinh tr\u01b0\u1edfng v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a c\u00e2y lai \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n r\u00f5 c\u00e1c t\u00ednh tr\u1ea1ng tr\u1ed9i \u1edf th\u1ebf h\u1ec7 F1. Sau khi lai ch\u00fang ta s\u1ebd ph\u00e1t hi\u1ec7n nh\u1eefng t\u00ednh tr\u1ea1ng tr\u1ed9i v\u00e0 \u00e1p d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p nh\u00e2n gi\u1ed1ng b\u1eb1ng sinh s\u1ea3n sinh d\u01b0\u1ee1ng c\u1ea5y m\u00f4, nh\u00e2n hom \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o di truy\u1ec1n c\u00e1c t\u00ednh tr\u1ea1ng tr\u1ed9i gi\u00fap t\u0103ng n\u0103ng su\u1ea5t v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng c\u00e2y r\u1eebng, khai th\u00e1c t\u00e0i nguy\u00ean c\u00f3 hi\u1ec7u qu\u1ea3.<\/p>\n

T\u00e0i li\u1ec7u tham kh\u1ea3o<\/strong><\/p>\n

1. Giang Misengu. Nh\u1eefng \u1ee9ng d\u1ee5ng c\u1ee7a di truuy\u1ec1n h\u1ecdc. NXB Khoa h\u1ecdc K\u1ef9 thu\u1eadt, H\u00e0 N\u1ed9i – 1982.<\/p>\n

2. Nguy\u1ec5n S\u1ef9 Mai. L\u00fd thuy\u1ebft v\u00e0 b\u00e0i t\u1eadp di truy\u1ec1n. Tr\u01b0\u1eddng C\u0110SP Tp H\u1ed3 Ch\u00ed Minh – 1986.<\/p>\n

3. Nguy\u1ec5n H\u1ea3i Tu\u1ea5t, Ng\u00f4 Kim Kh\u00f4i. X\u1eed l\u00fd th\u1ed1ng k\u00ea k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u th\u1ef1c nghi\u1ec7m trong n\u00f4ng l\u00e2m nghi\u1ec7p tr\u00ean m\u00e1y vi t\u00ednh. NXB N\u00f4ng nghi\u1ec7p – 1986.<\/p>\n

Result of hybrid Melaleuea research in Kien Giang area<\/strong><\/p>\n

Summary: <\/em><\/strong>The past nearly one years the hybrid Melaleuca research in Kien Giang have got remarkable achievements. Many parental lines have been introducing , evaluating and using as genetic tools for multiplying producing hybrid seed F1 . Some new combinations , TTH1 , TTL1, TTL2 are being in area evaluation testing for production forest . In the coming years hybrid Meialeuea research in Kien Giang will focus on breeding new three- line hybrid combinations with high-yield, good quality and strong resistant to disease and insect pests in this area .<\/p>\n

**************************************************<\/p>\n","protected":false},"excerpt":{"rendered":"

Di truy\u1ec1n h\u1ecdc th\u1ef1c v\u1eadt phát huy \u1ee9ng d\u1ee5ng \u0111\u1ea7u tiên là khoa h\u1ecdc di truy\u1ec1n v\u1ec1 ch\u1ecdn gi\u1ed1ng, t\u1eeb xa x\u01b0a ng\u01b0\u1eddi ta \u0111ã ch\u1ecdn nh\u1eefng cây tr\u1ed3ng qúi và có nhi\u1ec1u thành t\u1ef1u khoa h\u1ecdc trên l\u0129nh v\u1ef1c này. K\u1ebft qu\u1ea3 cho th\u1ea5y hi\u1ec7n t\u01b0\u1ee3ng các c\u01a1 th\u1ec3 lai F1 kh\u1ecfe h\u01a1n b\u1ed1 m\u1eb9, sinh tr\u01b0\u1edfng và phát tri\u1ec3n nhanh, ch\u1ed1ng ch\u1ecbu v\u1edbi nh\u1eefng \u0111i\u1ec1u ki\u1ec7n b\u1ea5t l\u1ee3i c\u1ee7a môi tr\u01b0\u1eddng, cho n\u0103ng su\u1ea5t cao, \u0111\u1ea1t \u0111\u01b0\u1ee3c ph\u1ea9m ch\u1ea5t t\u1ed1t. \u0110\u1eb7c bi\u1ec7t trong tr\u01b0\u1eddng h\u1ee3p lai xa, s\u1ef1 khác nhau gi\u1eefa b\u1ed1 và m\u1eb9 r\u1ea5t l\u1edbn nên n\u1ebfu thành công thì s\u1ee9c s\u1ed1ng c\u1ee7a c\u01a1 th\u1ec3 lai r\u1ea5t cao.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[18],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8576"}],"collection":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/comments?post=8576"}],"version-history":[{"count":2,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8576\/revisions"}],"predecessor-version":[{"id":19325,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8576\/revisions\/19325"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=8576"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=8576"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=8576"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}