{"id":8662,"date":"2009-03-24T02:49:29","date_gmt":"2009-03-23T19:49:29","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/2009\/03\/danh-gia-kha-nang-sinh-truong-va-bieu-hien-hinh-thai-cua-keo-lai-nhan-tao-giua-keo-tai-tuong-acacia-mangium-va-keo-la-tram-a-auriculiformis\/"},"modified":"2019-09-25T10:02:15","modified_gmt":"2019-09-25T03:02:15","slug":"danh-gia-kha-nang-sinh-truong-va-bieu-hien-hinh-thai-cua-keo-lai-nhan-tao-giua-keo-tai-tuong-acacia-mangium-va-keo-la-tram-a-auriculiformis","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/danh-gia-kha-nang-sinh-truong-va-bieu-hien-hinh-thai-cua-keo-lai-nhan-tao-giua-keo-tai-tuong-acacia-mangium-va-keo-la-tram-a-auriculiformis\/","title":{"rendered":"\u0110\u00e1nh gi\u00e1 kh\u1ea3 n\u0103ng sinh tr\u01b0\u1edfng v\u00e0 bi\u1ec3u hi\u1ec7n h\u00ecnh th\u00e1i c\u1ee7a keo lai nh\u00e2n t\u1ea1o gi\u1eefa keo tai t\u01b0\u1ee3ng (Acacia mangium) v\u00e0 keo l\u00e1 tr\u00e0m (A.auriculiformis)"},"content":{"rendered":"

Nghi\u00eam Qu\u1ef3nh Chi<\/em><\/strong><\/p>\n

Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/em><\/h5>\n

Keo l\u00e1 tr\u00e0m (Acacia auriculiformis<\/em> A.Cunn ae Benth), Keo tai t\u01b0\u1ee3ng (A.mangium <\/em>Willd) v\u00e0 g\u1ea7n \u0111\u00e2y l\u00e0 gi\u1ed1ng lai t\u1ef1 nhi\u00ean gi\u1eefa hai lo\u00e0i (g\u1ecdi t\u1eaft l\u00e0 keo lai) \u0111\u00e3 tr\u1edf th\u00e0nh nh\u00f3m c\u00e2y tr\u1ed3ng ch\u00ednh cho c\u00e1c ch\u01b0\u01a1ng tr\u00ecnh tr\u1ed3ng r\u1eebng \u1edf n\u01b0\u1edbc ta, \u0111\u1eb7c bi\u1ec7t l\u00e0 tr\u1ed3ng r\u1eebng s\u1ea3n xu\u1ea5t cung c\u1ea5p nguy\u00ean li\u1ec7u th\u00f4 cho c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p gi\u1ea5y, c\u00f4ng nghi\u1ec7p v\u00e1n nh\u00e2n t\u1ea1o (v\u00e1n d\u0103m, v\u00e1n \u00e9p, v\u00e1n d\u00e1n…).<\/p>\n

Trong nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y nghi\u00ean c\u1ee9u lai gi\u1ed1ng v\u00e0 s\u1eed d\u1ee5ng gi\u1ed1ng lai \u0111ang l\u00e0 m\u1ed1i quan t\u00e2m c\u1ee7a c\u00e1c nh\u00e0 ch\u1ecdn gi\u1ed1ng n\u00f4ng l\u00e2m nghi\u1ec7p b\u1edfi m\u1ed9t \u0111\u1eb7c \u0111i\u1ec3m n\u1ed5i b\u1eadt c\u1ee7a gi\u1ed1ng lai l\u00e0 c\u00f3 \u01b0u th\u1ebf lai \u1edf \u0111\u1eddi lai F1. Ch\u00ednh v\u00ec th\u1ebf \u0111\u1ed1i v\u1edbi c\u00e1c lo\u00e0i keo, lai nh\u00e2n t\u1ea1o (th\u1ee5 ph\u1ea5n c\u00f3 ki\u1ec3m so\u00e1t) \u0111\u00e3 \u0111\u01b0\u1ee3c GS L\u00ea \u0110\u00ecnh Kh\u1ea3, KS Nguy\u1ec5n Vi\u1ec7t C\u01b0\u1eddng v\u00e0 c\u00e1c c\u1ed9ng t\u00e1c vi\u00ean ti\u1ebfn h\u00e0nh trong c\u00e1c n\u0103m 1997-2000 v\u00e0 \u0111\u00e3 t\u1ea1o ra m\u1ed9t s\u1ed1 t\u1ed5 h\u1ee3p lai thu\u1eadn ngh\u1ecbch v\u00e0 lai tr\u1edf l\u1ea1i l\u00e0m ngu\u1ed3n v\u1eadt li\u1ec7u \u0111\u1ec3 kh\u1ea3o nghi\u1ec7m v\u00e0 c\u00f3 nh\u1eefng \u0111\u00e1nh gi\u00e1 b\u01b0\u1edbc \u0111\u1ea7u d\u1ef1a tr\u00ean kh\u1ea3 n\u0103ng sinh tr\u01b0\u1edfng l\u00e0 ch\u1ec9 ti\u00eau quan tr\u1ecdng nh\u1ea5t quy\u1ebft \u0111\u1ecbnh n\u0103ng su\u1ea5t c\u0169ng nh\u01b0 d\u1ec5 d\u00e0ng quan s\u00e1t \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh s\u1ef1 bi\u1ec3u hi\u1ec7n c\u1ee7a \u01b0u th\u1ebf lai.<\/p>\n

1. V\u1eadt li\u1ec7u v\u00e0 ph\u01b0\u01a1ng ph\u00e1p nghi\u00ean c\u1ee9u.<\/h1>\n

1. 1. V\u1eadt li\u1ec7u nghi\u00ean c\u1ee9u.<\/em><\/strong><\/p>\n

V\u1eadt li\u1ec7u d\u00f9ng trong kh\u1ea3o nghi\u1ec7m bao g\u1ed3m:<\/p>\n

– 8 t\u1ed5 h\u1ee3p (g\u1ed3m c\u00e1c t\u1ed5 h\u1ee3p lai thu\u1eadn ngh\u1ecbch v\u00e0 lai tr\u1edf l\u1ea1i) \u0111\u00f3 l\u00e0 Aa32Am2, Am2Aa32; Aa32Am7, Am7Aa32; BV16Am7, BV16Aa32 v\u00e0 BV33Am7; BV33Aa32 v\u00e0 7 d\u00f2ng c\u00e2y tr\u1ed9i keo lai nh\u00e2n t\u1ea1o \u0111\u01b0\u1ee3c ch\u1ecdn t\u1eeb khu kh\u1ea3o nghi\u1ec7m tr\u1ed3ng n\u0103m 1998, 1999 (k\u00fd hi\u1ec7u l\u00e0 NT1, NT2, NT3, NT4, NT5, NT7 v\u00e0 NT8).<\/p>\n

– C\u00e1c gi\u1ed1ng \u0111\u1ed1i ch\u1ee9ng l\u00e0 3 d\u00f2ng keo lai t\u1ef1 nhi\u00ean \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn l\u00e0 gi\u1ed1ng qu\u1ed1c gia (BV10, BV16 v\u00e0 BV33), gi\u1ed1ng b\u1ed1 m\u1eb9, gi\u1ed1ng s\u1ea3n xu\u1ea5t c\u00f9ng gi\u1ed1ng c\u00f3 xu\u1ea5t x\u1ee9 t\u1ed1t nh\u1ea5t c\u1ee7a 2 lo\u00e0i n\u00e0y (Am xu\u1ea5t x\u1ee9 Pongaki v\u00e0 Aa xu\u1ea5t x\u1ee9 Coen River).<\/p>\n

2. 2. Ph\u01b0\u01a1ng ph\u00e1p nghi\u00ean c\u1ee9u.<\/strong><\/p>\n

V\u1ec1 h\u00ecnh th\u00e1i v\u00e0 gi\u1ea3i ph\u1eabu l\u00e1<\/h6>\n

M\u1eabu l\u00e1 \u0111\u01b0\u1ee3c l\u1ea5y l\u00e0 l\u00e1 tr\u01b0\u1edfng th\u00e0nh \u0111\u00e3 \u0111\u1ecbnh h\u00ecnh tr\u00ean c\u00e2y 7 th\u00e1ng tu\u1ed5i v\u1edbi 15 c\u00e2y\/t\u1ed5 h\u1ee3p, 5 l\u00e1\/c\u00e2y. C\u00e1c ch\u1ec9 ti\u00eau h\u00ecnh th\u00e1i \u0111\u01b0\u1ee3c \u0111o tr\u00ean m\u00e1y \u0111o di\u1ec7n t\u00edch AREA CI \u2013 202 c\u1ee7a Nh\u1eadt. C\u00e1c ch\u1ec9 ti\u00eau gi\u1ea3i ph\u1eabu \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n tr\u00ean k\u00ednh hi\u1ec3n vi \u0111i\u1ec7n t\u1eed Olympus BHS.<\/p>\n

V\u1ec1 sinh tr\u01b0\u1edfng.<\/em><\/p>\n

Kh\u1ea3o nghi\u1ec7m \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh t\u1ea1i Ba V\u00ec – H\u00e0 T\u00e2y tr\u00ean \u0111\u1ea5t \u0111\u1ed3i tr\u1ecdc lateritic ph\u00e1t tri\u1ec3n tr\u00ean sa th\u1ea1ch \u1edf \u0111\u1ed9 cao 70m tr\u00ean m\u1eb7t bi\u1ec3n, kh\u1ea3 n\u0103ng gi\u1eef n\u01b0\u1edbc k\u00e9m. B\u1ed1 tr\u00ed kh\u1ea3o nghi\u1ec7m theo William v\u00e0 Matheson (1994). C\u00e1c ch\u1ec9 ti\u00eau sinh tr\u01b0\u1edfng chi\u1ec1u cao, \u0111\u01b0\u1eddng k\u00ednh \u0111\u01b0\u1ee3c \u0111o \u0111\u1ecbnh k\u1ef3 v\u00e0 th\u1ec3 t\u00edch \u0111\u01b0\u1ee3c t\u00ednh theo c\u00f4ng th\u1ee9c (1):<\/p>\n

pD1.3<\/sub>2<\/sup>.H.f Trong \u0111\u00f3, p= 3.1416<\/p>\n

V = ————— (1) D1.3<\/sub>: \u0111\u01b0\u1eddng k\u00edn ngang ng\u1ef1c<\/p>\n

4 H: chi\u1ec1u cao<\/p>\n

f: h\u1ec7 s\u1ed1 h\u00ecnh d\u1ea1ng t\u1ea1m t\u00ednh = 0,5<\/p>\n

C\u00e1c s\u1ed1 li\u1ec7u thu th\u1eadp \u0111\u01b0\u1ee3c x\u1eed l\u00fd b\u1eb1ng ch\u01b0\u01a1ng tr\u00ecnh DATAPLUS, GENSTAT (William v\u00e0 Matheson, 1995) v\u00e0 ph\u1ea7n m\u1ec1m EXCEL 5.0 (Nguy\u1ec5n H\u1ea3i Tu\u1ea5t v\u00e0 Ng\u00f4 Kim Kh\u00f4i (1996)<\/p>\n

2. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u.<\/h1>\n

2. 1. C\u00e1c ch\u1ec9 ti\u00eau h\u00ecnh th\u00e1i, gi\u1ea3i ph\u1eabu l\u00e1. <\/em><\/strong><\/p>\n

S\u1ed1 li\u1ec7u \u1edf b\u1ea3ng 1 cho th\u1ea5y Keo tai t\u01b0\u1ee3ng c\u00f3 l\u00e1 l\u1edbn v\u00e0 to b\u1ea3n, v\u1edbi ch\u1ec9 s\u1ed1 l\u00e1 d\u00e0i\/r\u1ed9ng l\u00e0 2,64 \u2013 2,85 v\u00e0 di\u1ec7n t\u00edch l\u00e1 l\u00e0 50,13 \u2013 79,08cm2<\/sup>. Keo l\u00e1 tr\u00e0m l\u00e1 d\u00e0i v\u00e0 h\u1eb9p, v\u1edbi ch\u1ec9 s\u1ed1 l\u00e1 5,17 v\u00e0 di\u1ec7n t\u00edch l\u00e1 ch\u1ec9 l\u00e0 21,90cm2<\/sup>. C\u00f2n keo lai nh\u00ecn chung \u0111\u1ec1u th\u1ec3 hi\u1ec7n tr\u1ea1ng th\u00e1i trung gian gi\u1eefa hai lo\u00e0i, v\u1edbi ch\u1ec9 s\u1ed1 l\u00e1 l\u00e0 3,14 – 3,71 v\u00e0 di\u1ec7n t\u00edch l\u00e1 32.41 \u2013 52.74cm2<\/sup>.<\/p>\n

Tuy nhi\u00ean, m\u1ed9t \u0111i\u1ec1u d\u1ec5 nh\u1eadn th\u1ea5y l\u00e0 khi x\u00e9t tr\u00ean c\u00e1c t\u1ed5 h\u1ee3p lai c\u1ee5 th\u1ec3 trong ph\u00e9p lai thu\u1eadn ngh\u1ecbch, s\u1ed1 li\u1ec7u l\u1ea1i ghi nh\u1eadn s\u1ef1 \u1ea3nh h\u01b0\u1edfng di truy\u1ec1n c\u1ee7a t\u1ebf b\u00e0o ch\u1ea5t do nh\u1eefng sai kh\u00e1c trong bi\u1ec3u hi\u1ec7n t\u00ednh tr\u1ea1ng c\u1ee7a con lai. \u0110\u00f3 l\u00e0 khi Keo l\u00e1 tr\u00e0m l\u00e0m m\u1eb9 (Aa32Am2 v\u00e0 Aa32Am7) th\u00ec di\u1ec7n t\u00edch l\u00e1 ch\u1ec9 \u0111\u1ea1t t\u1eeb 32,41 \u0111\u1ebfn 37,16cm2<\/sup>; c\u00f2n khi keo tai t\u01b0\u1ee3ng l\u00e0m m\u1eb9 (Am7Aa32; Am2Aa32) di\u1ec7n t\u00edch l\u00e1 \u0111\u1ea1t t\u1eeb 42,88 \u0111\u1ebfn 52,74cm2<\/sup>.<\/p>\n

B\u1ea3ng 1. C\u00e1c ch\u1ec9 ti\u00eau h\u00ecnh th\u00e1i l\u00e1 c\u1ee7a m\u1ed9t s\u1ed1 t\u1ed5 h\u1ee3p keo lai nh\u00e2n t\u1ea1o<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
T\u1ed5 h\u1ee3p<\/strong><\/td>\nDi\u1ec7n t\u00edch (cm2)<\/strong><\/td>\nChi\u1ec1u d\u00e0i l\u00e1 (cm)<\/strong><\/td>\nChi\u1ec1u r\u1ed9ng l\u00e1 (cm)<\/strong><\/td>\nCh\u1ec9 s\u1ed1 d\u00e0i\/r\u1ed9ng (cm)<\/strong><\/td>\n<\/tr>\n
x<\/strong><\/td>\nV%<\/strong><\/td>\nX<\/strong><\/td>\nV%<\/strong><\/td>\nx<\/strong><\/td>\nV%<\/strong><\/td>\nx<\/strong><\/td>\nV%<\/strong><\/td>\n<\/tr>\n
Aa32<\/td>\n21,90<\/strong><\/td>\n16,17<\/td>\n12,96<\/strong><\/td>\n8,70<\/td>\n2,52<\/strong><\/td>\n10,40<\/td>\n5,17<\/strong><\/td>\n10,43<\/td>\n<\/tr>\n
Aa32 Am7<\/td>\n37,16<\/strong><\/td>\n14,03<\/td>\n14,88<\/strong><\/td>\n12,49<\/td>\n4,09<\/strong><\/td>\n7,01<\/td>\n3,66<\/strong><\/td>\n14,46<\/td>\n<\/tr>\n
Am7 Aa32<\/td>\n52,74<\/strong><\/td>\n14,71<\/td>\n16,10<\/strong><\/td>\n8,82<\/td>\n5,14<\/strong><\/td>\n9,62<\/td>\n3,14<\/strong><\/td>\n6,71<\/td>\n<\/tr>\n
Am7<\/td>\n79,08<\/strong><\/td>\n18,87<\/td>\n17,59<\/strong><\/td>\n11,52<\/td>\n6,69<\/strong><\/td>\n10,74<\/td>\n2,64<\/strong><\/td>\n9,54<\/td>\n<\/tr>\n
Aa32<\/td>\n21,90<\/strong><\/td>\n16,17<\/td>\n12,96<\/strong><\/td>\n8,70<\/td>\n2,52<\/strong><\/td>\n10,40<\/td>\n5,17<\/strong><\/td>\n10,43<\/td>\n<\/tr>\n
Aa32 Am2<\/td>\n32,41<\/strong><\/td>\n12,35<\/td>\n13,60<\/strong><\/td>\n6,77<\/td>\n3,76<\/strong><\/td>\n8,70<\/td>\n3,62<\/strong><\/td>\n9,76<\/td>\n<\/tr>\n
Am 2 Aa32<\/td>\n42,88<\/strong><\/td>\n11,48<\/td>\n15,00<\/strong><\/td>\n13,43<\/td>\n4,04<\/strong><\/td>\n4,02<\/td>\n3,71<\/strong><\/td>\n13,20<\/td>\n<\/tr>\n
Am2<\/td>\n50,13<\/strong><\/td>\n20,23<\/td>\n14,86<\/strong><\/td>\n9,84<\/td>\n5,24<\/strong><\/td>\n9,76<\/td>\n2,85<\/strong><\/td>\n9,54<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Nghi\u00ean c\u1ee9u gi\u1ea3i ph\u1eabu l\u00e1 c\u1ee7a c\u00e2y lai so s\u00e1nh v\u1edbi c\u00e2y b\u1ed1 m\u1eb9 s\u1ed1 li\u1ec7u cho th\u1ea5y s\u1ef1 sai kh\u00e1c l\u00e0 kh\u00f4ng \u0111\u00e1ng k\u1ec3 c\u1ea3 v\u1ec1 s\u1ed1 l\u01b0\u1ee3ng c\u0169ng nh\u01b0 k\u00edch th\u01b0\u1edbc kh\u00ed kh\u1ed5ng.<\/p>\n

B\u1ea3ng 2. Ch\u1ec9 ti\u00eau gi\u1ea3i ph\u1eabu c\u1ee7a m\u1ed9t s\u1ed1 t\u1ed5 h\u1ee3p lai v\u00e0 b\u1ed1 m\u1eb9 c\u1ee7a ch\u00fang<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
T\u1ed5 h\u1ee3p<\/strong><\/td>\nS\u1ed1 l\u00ad\u01b0\u1ee3ng kh\u00ed kh\u1ed5ng (mm2)<\/strong><\/td>\nK\u00edch th\u01b0\u00ad\u1edbc kh\u00ed kh\u1ed5ng (<\/strong>m<\/strong>m)<\/strong><\/td>\n<\/tr>\n
M\u1eb7t tr\u00e1i<\/strong><\/td>\nM\u1eb7t ph\u1ea3i<\/strong><\/td>\nM\u1eb7t tr\u00e1i<\/strong><\/td>\nM\u1eb7t ph\u1ea3i<\/strong><\/td>\n<\/tr>\n
D\u00e0i<\/strong><\/td>\nR\u1ed9ng<\/strong><\/td>\nD\u00e0i<\/strong><\/td>\nR\u1ed9ng<\/strong><\/td>\n<\/tr>\n
X<\/strong><\/td>\nV%<\/strong><\/td>\nX<\/strong><\/td>\nV%<\/strong><\/td>\nX<\/strong><\/td>\nV%<\/strong><\/td>\nX<\/strong><\/td>\nV%<\/strong><\/td>\nX<\/strong><\/td>\nV%<\/strong><\/td>\nX<\/strong><\/td>\nV%<\/strong><\/td>\n<\/tr>\n
Aa32<\/td>\n268,5<\/strong><\/td>\n8,3<\/td>\n257,8<\/strong><\/td>\n9,9<\/td>\n33,4<\/strong><\/td>\n5,1<\/td>\n21,9<\/strong><\/td>\n7,6<\/td>\n33,2<\/strong><\/td>\n4,9<\/td>\n20,6<\/strong><\/td>\n12,6<\/td>\n<\/tr>\n
Aa32Am7<\/td>\n268,9<\/strong><\/td>\n8,0<\/td>\n252,6<\/strong><\/td>\n8,2<\/td>\n32,3<\/strong><\/td>\n9,6<\/td>\n22,3<\/strong><\/td>\n8,6<\/td>\n31,5<\/strong><\/td>\n7,6<\/td>\n23,2<\/strong><\/td>\n14,0<\/td>\n<\/tr>\n
Am7Aa32<\/td>\n277,4<\/strong><\/td>\n12,4<\/td>\n261,5<\/strong><\/td>\n8,4<\/td>\n32,4<\/strong><\/td>\n7,9<\/td>\n20,2<\/strong><\/td>\n7,0<\/td>\n32,1<\/strong><\/td>\n6,7<\/td>\n21,4<\/strong><\/td>\n6,3<\/td>\n<\/tr>\n
Am7<\/td>\n284,4<\/strong><\/td>\n11,7<\/td>\n274,1<\/strong><\/td>\n14,0<\/td>\n35,4<\/strong><\/td>\n8,0<\/td>\n22,3<\/strong><\/td>\n6,8<\/td>\n34,6<\/strong><\/td>\n7,0<\/td>\n21,5<\/strong><\/td>\n8,0<\/td>\n<\/tr>\n
BV16<\/td>\n293,3<\/strong><\/td>\n10,3<\/td>\n284,1<\/strong><\/td>\n9,6<\/td>\n37,3<\/strong><\/td>\n9,8<\/td>\n22,4<\/strong><\/td>\n9,3<\/td>\n36,4<\/strong><\/td>\n5,8<\/td>\n22,5<\/strong><\/td>\n7,4<\/td>\n<\/tr>\n
BV16Am7<\/td>\n278,1<\/strong><\/td>\n12,3<\/td>\n277,0<\/strong><\/td>\n12,1<\/td>\n37,9<\/strong><\/td>\n6,4<\/td>\n23,2<\/strong><\/td>\n5,7<\/td>\n36,1<\/strong><\/td>\n7,0<\/td>\n22,3<\/strong><\/td>\n6,2<\/td>\n<\/tr>\n
BV16Aa32<\/td>\n271,1<\/strong><\/td>\n8,8<\/td>\n257,8<\/strong><\/td>\n9,7<\/td>\n36,2<\/strong><\/td>\n4,1<\/td>\n20,4<\/strong><\/td>\n5,1<\/td>\n35,3<\/strong><\/td>\n4,8<\/td>\n21,4<\/strong><\/td>\n4,7<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

2. 2. \u0110\u1eb7c \u0111i\u1ec3m sinh tr\u01b0\u1edfng.<\/em><\/strong><\/p>\n

Sinh tr\u01b0\u1edfng l\u00e0 ch\u1ec9 ti\u00eau quan tr\u1ecdng nh\u1ea5t \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 hi\u1ec7u qu\u1ea3 c\u1ee7a lai gi\u1ed1ng v\u00e0 s\u1eed d\u1ee5ng gi\u1ed1ng lai trong s\u1ea3n xu\u1ea5t l\u00e2m nghi\u1ec7p. S\u1ed1 li\u1ec7u thu \u0111\u01b0\u1ee3c \u1edf b\u1ea3ng 3 cho th\u1ea5y sinh tr\u01b0\u1edfng c\u1ee7a keo lai nh\u00e2n t\u1ea1o sau 16 th\u00e1ng tu\u1ed5i \u0111\u1ec1u cho th\u1ec3 t\u00edch th\u00e2n c\u00e2y v\u01b0\u1ee3t h\u01a1n gi\u1ed1ng b\u1ed1 m\u1eb9, gi\u1ed1ng c\u00f3 xu\u1ea5t x\u1ee9 t\u1ed1t c\u0169ng nh\u01b0 gi\u1ed1ng s\u1ea3n xu\u1ea5t.<\/p>\n

Khi so s\u00e1nh v\u1edbi c\u00e1c d\u00f2ng keo lai t\u1ef1 nhi\u00ean (BV10, BV16 v\u00e0 BV33) l\u00e0 c\u00e1c gi\u1ed1ng \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn gi\u1ed1ng qu\u1ed1c gia nh\u1eadn th\u1ea5y c\u00f3 3 d\u00f2ng keo lai nh\u00e2n t\u1ea1o l\u1ea7n l\u01b0\u1ee3t l\u00e0 NT1, NT2 v\u00e0 NT3 c\u00f3 th\u1ec3 t\u00edch th\u00e2n c\u00e2y t\u01b0\u01a1ng \u1ee9ng l\u00e0 2,69dm3<\/sup>, 2,61dm3<\/sup> v\u00e0 2,46dm3<\/sup> v\u01b0\u1ee3t h\u01a1n th\u1ec3 t\u00edch th\u00e2n c\u00e2y c\u1ee7a c\u00e1c d\u00f2ng BV33 (2.31dm3<\/sup>) v\u00e0 BV16 (1.69dm3<\/sup>), nh\u01b0ng v\u1eabn kh\u00f4ng th\u1ec3 v\u01b0\u1ee3t \u0111\u01b0\u1ee3c d\u00f2ng BV10 (3.36 dm3<\/sup>). Tuy nhi\u00ean, v\u1ec1 gi\u00e1 tr\u1ecb th\u1ed1ng k\u00ea th\u00ec ch\u00fang thu\u1ed9c c\u00f9ng m\u1ed9t nh\u00f3m (tr\u1eeb d\u00f2ng BV16).<\/p>\n

S\u1ed1 li\u1ec7u \u1edf b\u1ea3ng 3 c\u0169ng cho th\u1ea5y m\u1ed9t v\u1ea5n \u0111\u1ec1 c\u1ea7n l\u01b0u \u00fd l\u00e0 trong s\u1ed1 c\u00e1c d\u00f2ng keo lai nh\u00e2n t\u1ea1o \u0111\u01b0\u1ee3c ch\u1ecdn c\u00f3 2 d\u00f2ng NT7 v\u00e0 NT4 l\u1ea1i kh\u00f4ng t\u00ecm th\u1ea5y s\u1ef1 sai kh\u00e1c n\u00e0o \u0111\u00e1ng k\u1ec3 v\u1ec1 sinh tr\u01b0\u1edfng. S\u1ed1 li\u1ec7u v\u1ec1 th\u1ec3 t\u00edch th\u00e2n c\u00e2y c\u1ee7a d\u00f2ng NT7 l\u00e0 1,21dm3<\/sup> v\u00e0 d\u00f2ng NT4 l\u00e0 0,90dm3<\/sup> thu\u1ed9c c\u00f9ng m\u1ed9t nh\u00f3m v\u1edbi c\u00e1c gi\u1ed1ng s\u1ea3n xu\u1ea5t (Aa CtyG v\u00e0 Am CtyG l\u00e0 1,02 \u2013 1,03dm3<\/sup>). \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 l\u00e0 do t\u00e1c d\u1ee5ng l\u1eabn nhau c\u1ee7a hi\u1ec7n t\u01b0\u1ee3ng \u01b0u th\u1ebf lai v\u1edbi \u0111i\u1ec1u ki\u1ec7n ngo\u1ea1i c\u1ea3nh. Tuy nhi\u00ean, \u0111\u00e2y m\u1edbi ch\u1ec9 l\u00e0 nh\u1eefng \u0111\u00e1nh gi\u00e1 b\u01b0\u1edbc \u0111\u1ea7u c\u1ea7n ti\u1ebfn h\u00e0nh kh\u1ea3o nghi\u1ec7m ti\u1ebfp \u0111\u1ec3 c\u00f3 c\u00e1c k\u1ebft lu\u1eadn ch\u00ednh x\u00e1c h\u01a1n.<\/p>\n

B\u1ea3ng 3. Sinh tr\u01b0\u1edfng c\u1ee7a m\u1ed9t s\u1ed1 t\u1ed5 h\u1ee3p keo lai giai \u0111o\u1ea1n 16 th\u00e1ng tu\u1ed5i<\/em><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
TT<\/strong><\/td>\nT\u1ed5 h\u1ee3p<\/strong><\/td>\n\n

D1.3 (cm)<\/u><\/h2>\n<\/td>\n

Hvn (m)<\/strong><\/td>\nV (dm3<\/sup>)<\/strong><\/td>\nT\u1ef7 l\u1ec7<\/strong><\/p>\n

s\u1ed1ng <\/strong>(%)<\/td>\n<\/tr>\n

Xtb<\/strong><\/td>\nV%<\/strong><\/td>\nXtb<\/strong><\/td>\nV%<\/strong><\/td>\nXtb<\/strong><\/td>\nV%<\/strong><\/td>\n<\/tr>\n
1<\/td>\nBV10<\/strong><\/td>\n4,05<\/td>\n8,44<\/td>\n4,87<\/td>\n4,43<\/td>\n3,36<\/td>\n25,00<\/td>\n96,70<\/strong><\/td>\n<\/tr>\n
2<\/td>\nNT1 <\/strong>(Am31Aa32)<\/td>\n3,82<\/td>\n6,88<\/td>\n4,47<\/td>\n4,72<\/td>\n2,69<\/td>\n22,30<\/td>\n100,00<\/strong><\/td>\n<\/tr>\n
3<\/td>\nNT2 <\/strong>(Am7Aa32)<\/td>\n3,78<\/td>\n11,27<\/td>\n4,21<\/td>\n7,29<\/td>\n2,61<\/td>\n25,29<\/td>\n93,30<\/strong><\/td>\n<\/tr>\n
4<\/td>\n\n

Aa32Am7<\/h3>\n<\/td>\n

3,70<\/td>\n19,71<\/td>\n4,19<\/td>\n10,20<\/td>\n2,57<\/td>\n45,53<\/td>\n80,00<\/strong><\/td>\n<\/tr>\n
5<\/td>\nNT3 <\/strong>(Aa34Am2)<\/td>\n3,64<\/td>\n7,66<\/td>\n4,38<\/td>\n5,04<\/td>\n2,46<\/td>\n23,58<\/td>\n93,30<\/strong><\/td>\n<\/tr>\n
6<\/td>\nBV33<\/strong><\/td>\n3,33<\/td>\n11,84<\/td>\n4,59<\/td>\n5,99<\/td>\n2,31<\/td>\n41,56<\/td>\n100,00<\/strong><\/td>\n<\/tr>\n
7<\/td>\nAm7Aa32<\/strong><\/td>\n3,51<\/td>\n25,72<\/td>\n3,99<\/td>\n9,53<\/td>\n2,30<\/td>\n57,39<\/td>\n36,70<\/strong><\/td>\n<\/tr>\n
8<\/td>\nBV33Am7<\/strong><\/td>\n3,58<\/td>\n12,22<\/td>\n4,10<\/td>\n7,17<\/td>\n2,28<\/td>\n31,58<\/td>\n83,30<\/strong><\/td>\n<\/tr>\n
9<\/td>\nAa32Am2<\/strong><\/td>\n3,43<\/td>\n25,44<\/td>\n3,92<\/td>\n16,29<\/td>\n2,24<\/td>\n58,48<\/td>\n83,30<\/strong><\/td>\n<\/tr>\n
10<\/td>\nNT8 <\/strong>(BV33Am7)<\/td>\n3,27<\/td>\n18,69<\/td>\n4,01<\/td>\n10,04<\/td>\n2,00<\/td>\n50,50<\/td>\n86,70<\/strong><\/td>\n<\/tr>\n
11<\/td>\n\n

Am2Aa32<\/h3>\n<\/td>\n

3,09<\/td>\n28,87<\/td>\n3,75<\/td>\n15,97<\/td>\n1,85<\/td>\n60,00<\/td>\n76,70<\/strong><\/td>\n<\/tr>\n
12<\/td>\nBV16<\/strong><\/td>\n3,01<\/td>\n15,46<\/td>\n4,00<\/td>\n10,76<\/td>\n1,69<\/td>\n47,93<\/td>\n100,00<\/strong><\/td>\n<\/tr>\n
13<\/td>\nNT6 (<\/strong>BV16Am2)<\/td>\n2,93<\/td>\n12,29<\/td>\n3,98<\/td>\n9,45<\/td>\n1,55<\/td>\n29,68<\/td>\n86,70<\/strong><\/td>\n<\/tr>\n
14<\/td>\n\n

BV33Aa32<\/h3>\n<\/td>\n

2,89<\/td>\n13,43<\/td>\n3,75<\/td>\n5,46<\/td>\n1,37<\/td>\n33,58<\/td>\n66,70<\/strong><\/td>\n<\/tr>\n
15<\/td>\nAm7<\/strong><\/td>\n2,93<\/td>\n16,98<\/td>\n3,40<\/td>\n9,94<\/td>\n1,37<\/td>\n49,64<\/td>\n86,70<\/strong><\/td>\n<\/tr>\n
16<\/td>\nAa32<\/strong><\/td>\n2,86<\/td>\n11,29<\/td>\n3,63<\/td>\n5,40<\/td>\n1,27<\/td>\n25,98<\/td>\n100,00<\/strong><\/td>\n<\/tr>\n
17<\/td>\nNT7 <\/strong>(BV16Am25)<\/td>\n2,88<\/td>\n9,35<\/td>\n3,47<\/td>\n4,98<\/td>\n1,21<\/td>\n20,66<\/td>\n86,70<\/strong><\/td>\n<\/tr>\n
18<\/td>\n\n

BV16Am7<\/h3>\n<\/td>\n

2,79<\/td>\n11,61<\/td>\n3,44<\/td>\n6,56<\/td>\n1,19<\/td>\n25,21<\/td>\n86,70<\/strong><\/td>\n<\/tr>\n
19<\/td>\nAm Pongaki<\/strong><\/td>\n2,69<\/td>\n13,09<\/td>\n3,41<\/td>\n8,10<\/td>\n1,09<\/td>\n37,61<\/td>\n83,30<\/strong><\/td>\n<\/tr>\n
20<\/td>\nAa Cty gi\u1ed1ng<\/strong><\/td>\n2,60<\/td>\n14,25<\/td>\n3,41<\/td>\n10,36<\/td>\n1,03<\/td>\n34,95<\/td>\n86,70<\/strong><\/td>\n<\/tr>\n
21<\/td>\nAm Cty gi\u1ed1ng<\/strong><\/td>\n2,53<\/td>\n24,02<\/td>\n3,13<\/td>\n11,42<\/td>\n1,02<\/td>\n76,47<\/td>\n93,30<\/strong><\/td>\n<\/tr>\n
22<\/td>\nBV16Aa32<\/strong><\/td>\n2,56<\/td>\n15,27<\/td>\n3,35<\/td>\n8,15<\/td>\n0,98<\/td>\n38,78<\/td>\n73,30<\/strong><\/td>\n<\/tr>\n
23<\/td>\nNT4 <\/strong>(BV16Am7)<\/td>\n2,48<\/td>\n9,97<\/td>\n3,33<\/td>\n7,27<\/td>\n0,90<\/td>\n24,44<\/td>\n86,70<\/strong><\/td>\n<\/tr>\n
24<\/td>\n\n

AaCoen<\/h3>\n<\/td>\n

2,15<\/td>\n19,00<\/td>\n2,74<\/td>\n9,26<\/td>\n0,60<\/td>\n35,00<\/td>\n93,30<\/strong><\/td>\n<\/tr>\n
L.S.D<\/strong><\/td>\n0,66<\/strong><\/td>\n0,61<\/strong><\/td>\n0,89<\/strong><\/td>\n<\/tr>\n
Fpr< .001<\/td>\nFpr<.001<\/td>\nFpr<.001<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

3. K\u1ebft lu\u1eadn.<\/strong><\/p>\n

– C\u00e1c ch\u1ec9 ti\u00eau h\u00ecnh th\u00e1i l\u00e1 nh\u00ecn chung th\u1ec3 hi\u1ec7n t\u00ednh trung gian gi\u1eefa b\u1ed1 v\u00e0 m\u1eb9. Ri\u00eang v\u1ec1 \u0111\u1eb7c \u0111i\u1ec3m gi\u1ea3i ph\u1eabu l\u00e1 th\u00ec g\u1ea7n nh\u01b0 kh\u00f4ng c\u00f3 s\u1ef1 sai kh\u00e1c gi\u1eefa c\u00e1c t\u1ed5 h\u1ee3p lai so v\u1edbi b\u1ed1 m\u1eb9<\/p>\n

– X\u00e9t tr\u00ean c\u00e1c t\u1ed5 h\u1ee3p lai thu\u1eadn ngh\u1ecbch c\u1ee5 th\u1ec3 v\u1ec1 ch\u1ec9 s\u1ed1 di\u1ec7n t\u00edch l\u00e1 cho th\u1ea5y s\u1ef1 \u1ea3nh h\u01b0\u1edfng r\u1ea5t r\u00f5 c\u1ee7a t\u1ebf b\u00e0o ch\u1ea5t (di truy\u1ec1n theo h\u1ec7 m\u1eb9).<\/p>\n

– C\u00e2y lai \u0111\u00e3 th\u1ec3 hi\u1ec7n \u01b0u th\u1ebf lai r\u00f5 r\u1ec7t v\u1ec1 sinh tr\u01b0\u1edfng, \u0111\u1eb7c bi\u1ec7t l\u00e0 c\u00e1c d\u00f2ng c\u00e2y tr\u1ed9i NT1, NT2 v\u00e0 NT3 c\u00f3 th\u1ec3 t\u00edch th\u00e2n c\u00e2y v\u01b0\u1ee3t h\u01a1n so v\u1edbi d\u00f2ng BV16 v\u00e0 thu\u1ed9c c\u00f9ng m\u1ed9t nh\u00f3m v\u1edbi c\u00e1c d\u00f2ng BV10 v\u00e0 BV33.<\/p>\n

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

1. L\u00ea \u0110\u00ecnh Kh\u1ea3, 1999. Nghi\u00ean c\u1ee9u s\u1eed d\u1ee5ng gi\u1ed1ng lai t\u1ef1 nhi\u00ean gi\u1eefa keo tai t\u01b0\u1ee3ng v\u00e0 keo l\u00e1 tr\u00e0m \u1edf Vi\u1ec7t Nam. Nh\u00e0 xu\u1ea5t b\u1ea3n N\u00f4ng nghi\u1ec7p.<\/p>\n

2. L\u00ea \u0110\u00ecnh Kh\u1ea3, Nguy\u1ec5n Vi\u1ec7t C\u01b0\u1eddng, 2000. \u1ea3nh h\u01b0\u1edfng c\u1ee7a nh\u00e2n t\u1ed1 di truy\u1ec1n v\u00e0 \u0111i\u1ec1u ki\u1ec7n l\u1eadp \u0111\u1ecba \u0111\u1ebfn s\u1ef1 bi\u1ec3u hi\u1ec7n c\u1ee7a \u01b0u th\u1ebf lai \u1edf m\u1ed9t s\u1ed1 gi\u1ed1ng b\u1ea1ch \u0111\u00e0n. T\u1ea1p ch\u00ed L\u00e2m nghi\u1ec7p, trang 22- 24, s\u1ed1 8-2000.<\/p>\n

3. Sapit Royampaeng, K.C. Woo, Somyos Kijkar and Kelvin Montagu, 1997. Morphology and growth performance of natural hybrids of Acacia mangium<\/em> and A. auriculiformis<\/em> in Thailand. Northern Territory University, Australiaand ASEANForestTree Seed Centre, Thailand.<\/p>\n

Summary<\/p>\n

Main feature of a hybrid is heterosis in F1 generation. Artificial hybridisation (called also control pollination) such as reciprocal crossing and back crossing has been practiced in Vietnam since 1997 and some hybrid combinations are used as material sources for this study. Research on morphological characteristics of the hybrid (and clones) reveals the intermediate nature between A. auriculiformis<\/em> and A. mangium<\/em> in width\/length index in reciprocal combinations is affected by cytoplasmic genetic property. In general, natural and artificial hybrids both have faster growth than their parental species and their provenances. Specially there are 4 artificial hybrid combination that show obvious heterosis though superior growth than natural hybrid clones BV16 and BV33. These 4 artificial hybrid combinations are in the same group with clone BV10, a clone of best growth in Vietnamat present.<\/p>\n","protected":false},"excerpt":{"rendered":"

Keo lá tràm (Acacia auriculiformis A.Cunn ae Benth), Keo tai t\u01b0\u1ee3ng (A.mangium Willd) và g\u1ea7n \u0111ây là gi\u1ed1ng lai t\u1ef1 nhiên gi\u1eefa hai loài (g\u1ecdi t\u1eaft là keo lai) \u0111ã tr\u1edf thành nhóm cây tr\u1ed3ng chính cho các ch\u01b0\u01a1ng trình tr\u1ed3ng r\u1eebng \u1edf n\u01b0\u1edbc ta, \u0111\u1eb7c bi\u1ec7t là tr\u1ed3ng r\u1eebng s\u1ea3n xu\u1ea5t cung c\u1ea5p nguyên li\u1ec7u thô cho các ngành công nghi\u1ec7p gi\u1ea5y, công nghi\u1ec7p ván nhân t\u1ea1o (ván d\u0103m, ván ép, ván dán…). <\/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\/8662"}],"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=8662"}],"version-history":[{"count":2,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8662\/revisions"}],"predecessor-version":[{"id":19258,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8662\/revisions\/19258"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=8662"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=8662"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=8662"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}