{"id":9738,"date":"2012-02-13T02:53:13","date_gmt":"2012-02-12T19:53:13","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/2012\/02\/ket-qua-buoc-dau-trong-nghien-cuu-ung-dung-chi-thi-phan-tu-trong-chon-tao-giong-bach-dan-trang-khang-benh-dom-la\/"},"modified":"2013-10-06T09:02:34","modified_gmt":"2013-10-06T02:02:34","slug":"ket-qua-buoc-dau-trong-nghien-cuu-ung-dung-chi-thi-phan-tu-trong-chon-tao-giong-bach-dan-trang-khang-benh-dom-la","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/ket-qua-buoc-dau-trong-nghien-cuu-ung-dung-chi-thi-phan-tu-trong-chon-tao-giong-bach-dan-trang-khang-benh-dom-la\/","title":{"rendered":"K\u1ebft qu\u1ea3 b\u01b0\u1edbc \u0111\u1ea7u trong nghi\u00ean c\u1ee9u \u1ee9ng d\u1ee5ng ch\u1ec9 th\u1ecb ph\u00e2n t\u1eed trong ch\u1ecdn t\u1ea1o gi\u1ed1ng B\u1ea1ch \u0111\u00e0n tr\u1eafng kh\u00e1ng b\u1ec7nh \u0111\u1ed1m l\u00e1"},"content":{"rendered":"<p> <strong>Tr\u1ea7n Thanh Tr\u0103ng, Nguy\u1ec5n Minh Ch\u00ed, B\u00f9i Quang Ti\u1ebfp<\/strong> <\/p>\n<p> <em>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/em> <\/p>\n<p> <strong>T\u00d3M T\u1eaeT<\/strong> <\/p>\n<p> S\u00e1u m\u01b0\u01a1i ch\u1ee7ng n\u1ea5m <em>Cryptosporiopsis eucalypti<\/em> thu th\u1eadp tr\u00ean c\u00e1c c\u00e2y ch\u1ee7 b\u1ea1ch \u0111\u00e0n t\u1eeb mi\u1ec1n b\u1eafc, mi\u1ec1n trung v\u00e0 mi\u1ec1n nam \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00e2n l\u1eadp v\u00e0 \u0111\u1ecbnh lo\u1ea1i b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p h\u00ecnh th\u00e1i h\u1ecdc. M\u01b0\u1eddi n\u0103m ch\u1ee7ng n\u1ea5m \u0111\u1ea1i di\u1ec7n cho ba v\u00f9ng \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch m\u1ed1i quan h\u1ec7 di truy\u1ec1n gi\u1eefa c\u00e1c ch\u1ee7ng b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p sinh h\u1ecdc ph\u00e2n t\u1eed (ph\u00e2n t\u00edch v\u00f9ng tr\u00ecnh t\u1ef1 ITS). S\u1ef1 kh\u00e1c bi\u1ec7t trong v\u00f9ng ITS gi\u1eefa c\u00e1c ch\u1ee7ng l\u00e0 kh\u00f4ng l\u1edbn, song \u0111\u00e3 c\u00f3 s\u1ef1 s\u1eafp x\u1ebfp c\u1ee7a c\u00e1c ch\u1ee7ng n\u1ea5m theo v\u00f9ng \u0111\u1ecba l\u00fd thu th\u1eadp m\u1eabu. C\u00e1c ch\u1ee7ng n\u1ea5m thu th\u1eadp trong m\u1ed9t v\u00f9ng c\u00f3 \u0111\u1ed9 t\u01b0\u01a1ng \u0111\u1ed3ng cao, l\u00ean \u0111\u1ebfn 100%. Kho\u1ea3ng c\u00e1ch di truy\u1ec1n c\u1ee7a c\u00e1c ch\u1ee7ng thu\u1ed9c nh\u00f3m I v\u00e0 nh\u00f3m III l\u1edbn h\u01a1n so v\u1edbi c\u00e1c ch\u1ee7ng thu\u1ed9c nh\u00f3m II v\u00e0 nh\u00f3m III. <\/p>\n<p> M\u01b0\u1eddi hai t\u1ed5 h\u1ee3p lai (th\u1ee5 ph\u1ea5n c\u00f3 ki\u1ec3m so\u00e1t) \u0111\u01b0\u1ee3c lai t\u1eeb s\u00e1u d\u00f2ng B\u1ea1ch \u0111\u00e0n tr\u1eafng (<em>E. camaldulensis<\/em>) kh\u00e1ng b\u1ec7nh \u0111\u1ed1m l\u00e1 v\u00e0 b\u1ed1n d\u00f2ng B\u1ea1ch \u0111\u00e0n tr\u1eafng m\u1eabn c\u1ea3m v\u1edbi b\u1ec7nh \u0111\u1ed1m l\u00e1. T\u1ef7 l\u1ec7 thu qu\u1ea3 lai trung b\u00ecnh so v\u1edbi s\u1ed1 hoa \u0111\u01b0\u1ee3c th\u1ee5 ph\u1ea5n l\u00e0 29,96% v\u00e0 s\u1ed1 h\u1ea1t b\u00ecnh qu\u00e2n tr\u00ean m\u1ed7i qu\u1ea3 lai l\u00e0 8,3 h\u1ea1t.  <\/p>\n<p> <strong>T\u1eeb kh\u00f3a:<\/strong> v\u00f9ng ITS, <em>Cryptosporiopsis eucalypti<\/em>, t\u1ed5 h\u1ee3p lai B\u1ea1ch \u0111\u00e0n tr\u1eafng <\/p>\n<p> <strong>GI\u1edaI THI\u1ec6U<\/strong> <\/p>\n<p> B\u1ea1ch \u0111\u00e0n l\u00e0 m\u1ed9t trong s\u1ed1 c\u00e1c lo\u00e0i c\u00e2y tr\u1ed3ng r\u1eebng ch\u00ednh \u1edf Vi\u1ec7t Nam, n\u00f3 \u0111\u01b0\u1ee3c tr\u1ed3ng \u1edf h\u1ea7u h\u1ebft c\u00e1c t\u1ec9nh th\u00e0nh tr\u00ean c\u1ea3 n\u01b0\u1edbc v\u1edbi c\u00e1c quy m\u00f4 kh\u00e1c nhau, t\u1eeb tr\u1ed3ng r\u1eebng t\u1eadp trung v\u1edbi di\u1ec7n t\u00edch l\u1edbn cho \u0111\u1ebfn tr\u1ed3ng r\u1eebng h\u1ed7n giao, h\u1ed7n lo\u00e0i, tr\u1ed3ng c\u00e2y ph\u00e2n t\u00e1n (Nguy\u1ec5n Ho\u00e0ng Ngh\u0129a 2000).  <\/p>\n<p> T\u1eeb cu\u1ed1i nh\u1eefng n\u0103m 1980, \u0111\u1ea7u nh\u1eefng n\u0103m 1990 \u0111\u1ebfn nay d\u1ecbch b\u1ec7nh \u0111\u1ed1m l\u00e1 do n\u1ea5m <em>Cryptosporiopsis eucalypti<\/em> g\u00e2y ra th\u01b0\u1eddng xuy\u00ean x\u1ea3y ra \u0111\u1ed1i v\u1edbi c\u00e1c r\u1eebng tr\u1ed3ng b\u1ea1ch \u0111\u00e0n \u1edf Vi\u1ec7t Nam, \u0111\u1eb7c bi\u1ec7t l\u00e0 \u1edf c\u00e1c v\u00f9ng \u0110\u00f4ng Nam B\u1ed9 (c\u00e1c t\u1ec9nh \u0110\u1ed3ng Nai, B\u00ecnh D\u01b0\u01a1ng, B\u00ecnh Ph\u01b0\u1edbc) v\u00e0 mi\u1ec1n Trung (c\u00e1c t\u1ec9nh Qu\u1ea3ng Nam, \u0110\u00e0 N\u1eb5ng v\u00e0 Th\u1eeba Thi\u00ean Hu\u1ebf). Theo k\u1ebft qu\u1ea3 \u0111i\u1ec1u tra \u0111\u00e1nh gi\u00e1 c\u1ee7a c\u00e1c t\u00e1c gi\u1ea3 Nguy\u1ec5n Ho\u00e0ng Ngh\u0129a (2000), Old v\u00e0 Yuan (1994) di\u1ec7n t\u00edch r\u1eebng tr\u1ed3ng b\u1ea1ch \u0111\u00e0n \u1edf Vi\u1ec7t Nam b\u1ecb b\u1ec7nh l\u00ean t\u1edbi 50% t\u1ed5ng di\u1ec7n t\u00edch v\u1edbi c\u00e1c m\u1ee9c \u0111\u1ed9 kh\u00e1c nhau. C\u00e1c t\u00e1c gi\u1ea3 \u0111\u1ec1u c\u1ea3nh b\u00e1o nguy c\u01a1 g\u00e2y h\u1ea1i l\u1edbn c\u1ee7a c\u00e1c lo\u1ea1i d\u1ecbch b\u1ec7nh n\u00e0y \u0111\u1ed1i v\u1edbi r\u1eebng tr\u1ed3ng t\u1eadp trung, \u0111\u1eb7c bi\u1ec7t l\u00e0 r\u1eebng tr\u1ed3ng B\u1ea1ch \u0111\u00e0n tr\u1eafng <em>Eucalyptus camaldulensis<\/em> c\u00f3 xu\u1ea5t x\u1ee9 Petford. Khi g\u00e2y b\u1ec7nh tr\u00ean c\u00e2y b\u1ea1ch \u0111\u00e0n, n\u1ea5m b\u1ec7nh g\u00e2y b\u1ec7nh \u0111\u1ed1m l\u00e1 g\u00e2y ra tri\u1ec7u ch\u1ee9ng \u0111i\u1ec3n h\u00ecnh tr\u00ean l\u00e1 c\u00e2y l\u00e0 \u0111\u1ed1m l\u00e1, \u0111\u00f4i khi c\u00e1c l\u00e1 b\u1ecb b\u1ec7nh h\u00ecnh th\u00e0nh c\u00e1c u nh\u1ecf, tr\u00ean b\u1ec1 m\u1eb7t l\u00e1 s\u1ea7n s\u00f9i, l\u00e0m cho l\u00e1 b\u1ecb r\u1ee5ng, khi t\u1ea5n c\u00f4ng l\u00ean c\u00e0nh ho\u1eb7c ng\u1ecdn b\u1ea1ch \u0111\u00e0n n\u00f3 l\u00e0m cho c\u00e0nh ng\u1ecdn b\u1ecb kh\u00f4 h\u00e9o, sau \u0111\u00f3 m\u1ecdc l\u00ean c\u00e1c ch\u1ed3i v\u00e0 l\u00e1 non v\u1edbi k\u00edch th\u01b0\u1edbc r\u1ea5t nh\u1ecf v\u00e0o cu\u1ed1i m\u00f9a m\u01b0a, \u0111\u00f4i khi c\u00f2n l\u00e0m cho ng\u1ecdn v\u00e0 c\u00e0nh ng\u1ecdn b\u1ecb ch\u1ebft. N\u1ea5m <em>C. eucalypti<\/em> c\u00f3 nh\u1eefng th\u1ec3 qu\u1ea3 n\u1ea5m t\u1ed3n t\u1ea1i l\u00e2u d\u00e0i tr\u00ean \u0111\u1ec9nh ng\u1ecdn v\u00e0 c\u00e0nh nh\u1ecf, th\u01b0\u1eddng g\u00e2y l\u00ean tri\u1ec7u ch\u1ee9ng t\u00e1i x\u00e2m nhi\u1ec5m k\u00e9o d\u00e0i. Tri\u1ec7u ch\u1ee9ng \u0111i\u1ec3n h\u00ecnh n\u00e0y xu\u1ea5t hi\u1ec7n \u1edf h\u1ea7u h\u1ebft c\u00e1c lo\u00e0i b\u1ea1ch \u0111\u00e0n \u1edf kh\u1eafp c\u00e1c v\u00f9ng trong c\u1ea3 n\u01b0\u1edbc v\u1edbi t\u1ef7 l\u1ec7 v\u00e0 m\u1ee9c \u0111\u1ed9 b\u1ecb b\u1ec7nh r\u1ea5t kh\u00e1c nhau. \u1ede Vi\u1ec7t Nam c\u00e1c lo\u00e0i b\u1ea1ch \u0111\u00e0n b\u1ecb b\u1ec7nh n\u1eb7ng nh\u1ea5t do lo\u00e0i n\u1ea5m n\u00e0y g\u00e2y ra l\u00e0 B\u1ea1ch \u0111\u00e0n tr\u1eafng <em>E. camaldulensis<\/em> v\u00e0 m\u1ed9t s\u1ed1 d\u00f2ng b\u1ea1ch \u0111\u00e0n lai U6, W5 tr\u1ed3ng \u1edf nh\u1eefng n\u01a1i c\u00f3 l\u01b0\u1ee3ng m\u01b0a cao (Ph\u1ea1m Quang Thu 2005; Nguy\u1ec5n Ho\u00e0ng Ngh\u0129a 2006). <\/p>\n<p> <em>(K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u khoa h\u1ecdc c\u00f4ng ngh\u1ec7 giai \u0111o\u1ea1n 2006-2010, trang 74-82)<\/em> <\/p>\n","protected":false},"excerpt":{"rendered":"<p align=\"justify\">\n<span style=\"font-family: Arial; font-size: 10pt\">S&aacute;u m\u01b0\u01a1i ch\u1ee7ng n\u1ea5m <em>Cryptosporiopsis eucalypti<\/em> thu th\u1eadp tr&ecirc;n c&aacute;c c&acirc;y ch\u1ee7 b\u1ea1ch \u0111&agrave;n t\u1eeb mi\u1ec1n b\u1eafc, mi\u1ec1n trung v&agrave; mi\u1ec1n nam \u0111&atilde; \u0111\u01b0\u1ee3c ph&acirc;n l\u1eadp v&agrave; \u0111\u1ecbnh lo\u1ea1i b\u1eb1ng ph\u01b0\u01a1ng ph&aacute;p h&igrave;nh th&aacute;i h\u1ecdc. M\u01b0\u1eddi n\u0103m ch\u1ee7ng n\u1ea5m \u0111\u1ea1i di\u1ec7n cho ba v&ugrave;ng \u0111\u01b0\u1ee3c ph&acirc;n t&iacute;ch m\u1ed1i quan h\u1ec7 di truy\u1ec1n gi\u1eefa c&aacute;c ch\u1ee7ng b\u1eb1ng ph\u01b0\u01a1ng ph&aacute;p sinh h\u1ecdc ph&acirc;n t\u1eed (ph&acirc;n t&iacute;ch v&ugrave;ng tr&igrave;nh t\u1ef1 ITS).<\/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\/9738"}],"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=9738"}],"version-history":[{"count":1,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9738\/revisions"}],"predecessor-version":[{"id":11191,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9738\/revisions\/11191"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=9738"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=9738"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=9738"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}