C\u00e1c lo\u00e0i c\u00e2y h\u1ecd D\u1ea7u (Dipterocarpaceae) ph\u00e2n b\u1ed1 nhi\u1ec1u \u1edf khu v\u1ef1c \u1ea5n \u0110\u1ed9, Malaixia, k\u00e9o d\u00e0i t\u1eeb \u0111\u1ea3o Seychelle qua \u1ea5n \u0110\u1ed9 \u0111\u1ebfn Philippin, t\u1ea5t c\u1ea3 g\u1ed3m c\u00f3 13 chi v\u00e0 470 lo\u00e0i. \u1edf Vi\u1ec7t Nam h\u1ecd D\u1ea7u c\u00f3 6 chi v\u00e0 kho\u1ea3ng tr\u00ean 40 lo\u00e0i. Ph\u00eda Nam t\u1eeb Qu\u1ea3ng Nam tr\u1edf v\u00e0o c\u00f3 24 lo\u00e0i, khu v\u1ef1c mi\u1ec1n Trung t\u1eeb \u0111\u00e8o Ngang \u0111\u1ebfn \u0111\u00e8o H\u1ea3i V\u00e2n c\u00f3 9 lo\u00e0i, \u1edf mi\u1ec1n B\u1eafc c\u00f3 5 lo\u00e0i v\u00e0 1 lo\u00e0i c\u00f3 \u1edf c\u1ea3 3 v\u00f9ng. Ngo\u00e0i vi\u1ec7c cung c\u1ea5p g\u1ed7, c\u00e1c lo\u00e0i c\u00e2y h\u1ecd D\u1ea7u c\u00f2n cho m\u1ed9t s\u1ed1 s\u1ea3n ph\u1ea9m kh\u00e1c d\u00f9ng trong c\u00f4ng nghi\u1ec7p s\u01a1n v\u00e0 d\u1ea7u b\u00f3ng, trong d\u00e2n gian nh\u00e2n d\u00e2n c\u00f2n d\u00f9ng \u0111\u1ec3 x\u1ea3m thuy\u1ec1n [2] <\/p>\n
Theo Vi\u1ec7n \u0110i\u1ec1u tra quy ho\u1ea1ch r\u1eebng (1995) (1), n\u0103m 1959 di\u1ec7n t\u00edch c\u00e1c lo\u1ea1i r\u1eebng c\u00f3 c\u00e2y h\u1ecd D\u1ea7u \u1edf \u0110\u00f4ng Nam B\u1ed9 l\u00e0 1146 275 ha (Chi\u1ebfm 49% di\u1ec7n t\u00edch to\u00e0n v\u00f9ng). \u0110\u1ebfn n\u0103m 1968 gi\u1ea3m xu\u1ed1ng c\u00f2n 834 050 ha (Chi\u1ebfm 36% di\u1ec7n t\u00edch khu v\u1ef1c), n\u0103m 1982 gi\u1ea3m c\u00f2n 416 900 ha (b\u1eb1ng 18% di\u1ec7n t\u00edch) v\u00e0 n\u0103m 1992 ch\u1ec9 c\u00f2n 183 081 ha (8%). R\u00f5 r\u00e0ng l\u00e0 vi\u1ec7c b\u1ea3o t\u1ed3n c\u00e1c lo\u00e0i c\u00e2y h\u1ecd D\u1ea7u \u1edf n\u01b0\u1edbc ta \u0111\u00e3 tr\u1edf n\u00ean c\u1ea5p thi\u1ebft h\u01a1n bao gi\u1edd h\u1ebft, n\u00f3 g\u00f3p ph\u1ea7n v\u00e0o vi\u1ec7c b\u1ea3o t\u1ed3n ngu\u1ed3n gen c\u00e2y r\u1eebng \u0111ang c\u00f3 nguy c\u01a1 tuy\u1ec7t ch\u1ee7ng \u1edf n\u01b0\u1edbc ta. \u0110\u1ec3 c\u00f4ng t\u00e1c b\u1ea3o t\u1ed3n \u0111\u1ea1t k\u1ebft qu\u1ea3 t\u1ed1t, vi\u1ec7c nghi\u00ean c\u1ee9u m\u1ee9c \u0111\u1ed9 \u0111a d\u1ea1ng di truy\u1ec1n c\u1ee7a c\u00e1c lo\u00e0i c\u00e2y n\u00e0y l\u00e0 h\u1ebft s\u1ee9c c\u1ea7n thi\u1ebft. <\/p>\n
Nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y, s\u1ef1 ph\u00e1t tri\u1ec3n trong sinh h\u1ecdc ph\u00e2n t\u1eed \u0111\u00e3 cung c\u1ea5p nh\u1eefng c\u00f4ng c\u1ee5 h\u1eefu hi\u1ec7u cho ph\u00e2n t\u00edch di truy\u1ec1n, n\u00f3 \u0111\u00e1nh d\u1ea5u b\u1eb1ng s\u1ef1 ra \u0111\u1eddi c\u1ee7a c\u00e1c k\u1ef9 thu\u1eadt ch\u1ec9 th\u1ecb ph\u00e2n t\u1eed kh\u00e1c nhau nh\u01b0 k\u1ef9 thu\u1eadt RAPD, AFLP, SSR v.v. C\u00e1c ch\u1ec9 th\u1ecb n\u00e0y c\u00f3 vai tr\u00f2 quan tr\u1ecdng trong nghi\u00ean c\u1ee9u \u0111a d\u1ea1ng di truy\u1ec1n, s\u1ef1 ph\u00e1t sinh v\u00e0 x\u00e1c \u0111\u1ecbnh c\u00e1c lo\u00e0i [3]. Trong nghi\u00ean c\u1ee9u ph\u00e2n lo\u1ea1i ph\u00e2n t\u1eed v\u00e0 ph\u00e1t sinh lo\u00e0i, c\u00e1c ch\u1ec9 th\u1ecb ADN l\u1ee5c l\u1ea1p (cp DNA) c\u0169ng \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh ngu\u1ed3n g\u1ed1c v\u00e0 ph\u00e2n bi\u1ec7t lo\u00e0i \u1edf th\u1ef1c v\u1eadt. C\u00e1c ch\u1ec9 th\u1ecb ADN l\u1ee5c l\u1ea1p c\u00f3 \u0111\u1eb7c \u0111i\u1ec3m r\u1ea5t quan tr\u1ecdng l\u00e0 t\u00ednh b\u1ea3o th\u1ee7 cao v\u00e0 t\u1ea7n s\u1ed1 \u0111\u1ed9t bi\u1ebfn th\u1ea5p h\u01a1n so v\u1edbi ADN nh\u00e2n. Ch\u1ec9 th\u1ecb ADN l\u1ee5c l\u1ea1p th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0 c\u00e1c chu\u1ed7i kh\u00f4ng m\u00e3 v\u00e0 c\u00e1c gen nh\u01b0 16S, rbcL<\/em>, atpB<\/em>, matK<\/em> v.v. C\u00e1c ch\u1ec9 th\u1ecb n\u00e0y \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c nghi\u00ean c\u1ee9u v\u1ec1 quan h\u1ec7 ph\u00e1t sinh lo\u00e0i v\u00e0 ph\u00e2n lo\u1ea1i c\u1ee7a nhi\u1ec1u lo\u00e0i c\u00e2y nh\u01b0 c\u00e1c lo\u00e0i c\u00e2y cam chanh, c\u00e1c c\u00e2y h\u1ecd \u0111\u1eadu (Leguminosae), <\/em>h\u1ecd Hemerocallidaceaev\u00e0 h\u1ecdAraliaceae (7, 9, 8, 10,). \u0110\u1ed1i v\u1edbi c\u00e2y h\u1ecd D\u1ea7u, vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c ch\u1ec9 th\u1ecb ADN genome v\u00e0 l\u1ee5c l\u1ea1p v\u00e0o nghi\u00ean c\u1ee9u \u0111a d\u1ea1ng di truy\u1ec1n v\u00e0 ph\u00e1t sinh lo\u00e0i c\u0169ng \u0111\u00e3 \u0111\u01b0\u1ee3c m\u1ed9t s\u1ed1 t\u00e1c gi\u1ea3 c\u00f4ng b\u1ed1 (5, 6,). <\/p>\n Trong b\u00e0i n\u00e0y ch\u00fang t\u00f4i tr\u00ecnh b\u00e0y nh\u1eefng k\u1ebft qu\u1ea3 v\u1ec1 nghi\u00ean c\u1ee9u quan h\u1ec7 di truy\u1ec1n c\u1ee7a 17 lo\u00e0i thu\u1ed9c 6 chi h\u1ecd D\u1ea7u \u1edf Vi\u1ec7t Nam d\u1ef1a v\u00e0o \u0111a h\u00ecnh ADN genome (RAPD) v\u00e0 l\u1ee5c l\u1ea1p v\u1edbi m\u1ee5c \u0111\u00edch t\u00ecm hi\u1ec3u s\u1ef1 \u0111a d\u1ea1ng di truy\u1ec1n c\u1ee7a c\u00e1c lo\u00e0i n\u00e0y nh\u1eb1m g\u00f3p ph\u1ea7n v\u00e0o vi\u1ec7c b\u1ea3o t\u1ed3n ngu\u1ed3n gen. <\/p>\n Ngu\u1ed3n: K\u1ef7 y\u1ebfu H\u1ed9i ngh\u1ecb to\u00e0n qu\u1ed1c “Nh\u1eefng v\u1ea5n \u0111\u1ec1 nghi\u00ean c\u1ee9u c\u01a1 b\u1ea3n trong khoa h\u1ecdc s\u1ef1 s\u1ed1ng”, Nh\u00e0 xu\u1ea5t b\u1ea3n Khoa h\u1ecdc v\u00e0 k\u1ef9 thu\u1eadt, H\u00e0 N\u1ed9i, 2005. 1379-1382.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":" Các loài cây h\u1ecd D\u1ea7u (Dipterocarpaceae<\/span>) phân b\u1ed1 nhi\u1ec1u \u1edf khu v\u1ef1c \u1ea5n \u0110\u1ed9, Malaixia, kéo dài t\u1eeb \u0111\u1ea3o Seychelle qua \u1ea5n \u0110\u1ed9 \u0111\u1ebfn Philippin, t\u1ea5t c\u1ea3 g\u1ed3m có 13 chi và 470 loài. \u1edf Vi\u1ec7t <\/span>Nam<\/span><\/font> h\u1ecd D\u1ea7u có 6 chi và kho\u1ea3ng trên 40 loài.<\/font> <\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[13],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9143"}],"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=9143"}],"version-history":[{"count":1,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9143\/revisions"}],"predecessor-version":[{"id":10597,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9143\/revisions\/10597"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=9143"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=9143"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=9143"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}