{"id":6583,"date":"2012-06-01T03:34:18","date_gmt":"2012-05-31T20:34:18","guid":{"rendered":"http:\/\/antoansinhhoc.vn\/?p=2218"},"modified":"2012-06-01T03:34:18","modified_gmt":"2012-05-31T20:34:18","slug":"gen-dieu-khien-kich-thuoc-hat-giong","status":"publish","type":"post","link":"https:\/\/nbca.gov.vn\/gen-dieu-khien-kich-thuoc-hat-giong\/","title":{"rendered":"Gen \u0111i\u1ec1u khi\u1ec3n k\u00edch th\u01b0\u1edbc h\u1ea1t gi\u1ed1ng"},"content":{"rendered":"
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K\u00edch th\u01b0\u1edbc h\u1ea1t gi\u1ed1ng \u0111\u01b0\u1ee3c \u0111i\u1ec1u khi\u1ec3n b\u1edfi c\u00e1c ph\u00e2n t\u1eed ARN nh\u1ecf \u0111\u01b0\u1ee3c di truy\u1ec1n t\u1eeb c\u00e2y b\u1ed1 m\u1eb9. Nghi\u00ean c\u1ee9u c\u1ee7a c\u00e1c nh\u00e0 khoa h\u1ecdc thu\u1ed9c \u0110\u1ea1i h\u1ecdc Texas n\u00e0y c\u00f3 \u00fd ngh\u0129a l\u1edbn \u0111\u1ed1i v\u1edbi n\u1ec1n n\u00f4ng nghi\u1ec7p v\u00e0 s\u1ef1 hi\u1ec3u bi\u1ebft v\u1ec1 ti\u1ebfn h\u00f3a c\u1ee7a c\u00e2y tr\u1ed3ng.<\/span><\/p>\n

\u0110\u0103ng ng\u00e0y 01-06-2012<\/span> trong chuy\u00ean m\u1ee5c Tin th\u1ebf gi\u1edbi<\/a><\/p>\n<\/div>\n

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Theo Z. Jeff Chen, GS di truy\u1ec1n h\u1ecdc ph\u00e2n t\u1eed th\u1ef1c v\u1eadt thu\u1ed9c \u0110\u1ea1i h\u1ecdc Texas, h\u1ea1t gi\u1ed1ng c\u00e2y tr\u1ed3ng cung c\u1ea5p g\u1ea7n 70-80% n\u0103ng l\u01b0\u1ee3ng v\u00e0 60-70% protein cho c\u00e2y tr\u1ed3ng tr\u01b0\u1edfng th\u00e0nh. S\u1ea3n xu\u1ea5t h\u1ea1t gi\u1ed1ng h\u1ebft s\u1ee9c quan tr\u1ecdng \u0111\u1ed1i v\u1edbi n\u1ec1n n\u00f4ng nghi\u1ec7p v\u00e0 s\u1ef1 ti\u1ebfn h\u00f3a c\u1ee7a th\u1ef1c v\u1eadt.<\/p>\n

Chen v\u00e0 c\u00e1c c\u1ed9ng s\u1ef1 \u0111\u00e3 \u0111\u01b0a ra b\u1eb1ng ch\u1ee9ng \u0111\u1ea7u ti\u00ean ch\u1ee9ng minh s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a h\u1ea1t gi\u1ed1ng \u0111\u01b0\u1ee3c \u0111i\u1ec1u khi\u1ec3n b\u1edfi m\u1ed9t ARN nh\u1ecf th\u1eeba k\u1ebf t\u1eeb c\u00e2y m\u1eb9 l\u00e0 siRNAs. Nghi\u00ean c\u1ee9u v\u1ec1 s\u1ef1 \u0111i\u1ec1u khi\u1ec3n k\u00edch th\u01b0\u1edbc h\u1ea1t gi\u1ed1ng \u0111\u01b0\u1ee3c \u0111\u0103ng tr\u00ean t\u1ea1p ch\u00ed PNAS.<\/p>\n

SiRNA \u0111i\u1ec1u khi\u1ec3n m\u1ed9t s\u1ed1 y\u1ebfu t\u1ed1 t\u0103ng tr\u01b0\u1edfng v\u00e0 ph\u00e1t tri\u1ec3n \u1edf \u0111\u1ed9ng th\u1ef1c v\u1eadt. C\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u \u0111\u00e3 s\u1eed d\u1ee5ng c\u00e2y Arabidopsis, m\u1ed9t lo\u1ea1i th\u1ef1c v\u1eadt c\u00f3 hoa ph\u00e1t tri\u1ec3n nhanh ch\u00f3ng \u0111\u1ec3 nghi\u00ean c\u1ee9u.<\/p>\n

Trong th\u00ed nghi\u1ec7m, c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u \u0111\u00e3 ph\u00e1t hi\u1ec7n ra siRNA \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a n\u1ed9i nh\u0169 h\u1ea1t gi\u1ed1ng, ph\u1ea7n cung c\u1ea5p dinh d\u01b0\u1ee1ng cho s\u1ef1 ph\u00e1t tri\u1ec3n ph\u00f4i th\u1ef1c v\u1eadt.<\/p>\n

Trong h\u1ea1t gi\u1ed1ng c\u1ee7a th\u1ef1c v\u1eadt c\u00f3 hoa, ph\u00f4i \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh t\u1eeb s\u1ef1 h\u1ee3p nh\u1ea5t b\u1ed9 gen c\u1ee7a c\u00e2y b\u1ed1 v\u00e0 c\u00e2y m\u1eb9, trong khi n\u1ed9i nh\u0169 k\u1ebft h\u1ee3p m\u1ed9t h\u1ec7 gen c\u1ee7a b\u1ed1 v\u00e0 hai h\u1ec7 gen c\u1ee7a m\u1eb9. Qu\u00e1 tr\u00ecnh h\u00ecnh th\u00e0nh ph\u00f4i v\u00e0 n\u1ed9i nh\u0169 \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 qu\u00e1 tr\u00ecnh th\u1ee5 tinh k\u00e9p.<\/p>\n

C\u00e1c nh\u00e0 khoa h\u1ecdc \u0111\u00e3 ph\u00e1t hi\u1ec7n ra r\u1eb1ng khi m\u1ed9t c\u00e2y hoa c\u00e1i c\u00f3 b\u1ed9 gen t\u1ee9 b\u1ed9i k\u1ebft h\u1ee3p v\u1edbi c\u00e2y hoa \u0111\u1ef1c c\u00f3 b\u1ed9 gen l\u01b0\u1ee1ng b\u1ed9i, kh\u00f4ng ch\u1ec9 x\u1ea3y ra hi\u1ec7n t\u01b0\u1ee3ng gia t\u0103ng b\u1ed9 gen c\u1ee7a c\u00e2y c\u00e1i trong n\u1ed9i nh\u0169 c\u1ee7a h\u1ea1t gi\u1ed1ng m\u00e0 c\u00f2n c\u00f3 s\u1ef1 gia t\u0103ng siARN t\u1eeb c\u00e2y m\u1eb9.<\/p>\n

C\u00e1c siRNA n\u00e0y l\u00e0m gi\u1ea3m bi\u1ec3u hi\u1ec7n gen d\u1eabn \u0111\u1ebfn n\u1ed9i nh\u0169 t\u0103ng tr\u01b0\u1edfng l\u1edbn h\u01a1n, t\u1ee9c l\u00e0 siRNA t\u1ea1o ra c\u00e1c h\u1ea1t gi\u1ed1ng k\u00edch th\u01b0\u1edbc nh\u1ecf h\u01a1n.<\/p>\n

C\u00e1c nh\u00e0 khoa h\u1ecdc \u0111ang t\u00ecm hi\u1ec3u ch\u00ednh x\u00e1c siRNA \u0111i\u1ec1u khi\u1ec3n s\u1ef1 bi\u1ec3u hi\u1ec7n gen trong n\u1ed9i nh\u0169, ph\u00f4i v\u00e0 k\u00edch th\u01b0\u1edbc h\u1ea1t gi\u1ed1ng nh\u01b0 th\u1ebf n\u00e0o. C\u00e1c nghi\u00ean c\u1ee9u n\u00e0y s\u1ebd gi\u00fap ph\u00e1t tri\u1ec3n c\u00e1c c\u00f4ng c\u1ee5 c\u00f4ng ngh\u1ec7 sinh h\u1ecdc nh\u1eb1m c\u1ea3i thi\u1ec7n gi\u1ed1ng v\u00e0 s\u1ea3n l\u01b0\u1ee3ng c\u00e2y tr\u1ed3ng.<\/p>\n

Tuy nhi\u00ean, Chen c\u0169ng c\u1ea3nh b\u00e1o, l\u1edbn h\u01a1n kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng t\u1ed1t h\u01a1n. Th\u1ef1c t\u1ebf, trong c\u00e1c th\u00ed nghi\u1ec7m c\u1ee7a \u00f4ng, c\u00e1c h\u1ea1t gi\u1ed1ng thi\u1ebfu s\u1ef1 \u0111i\u1ec1u khi\u1ec3n c\u1ee7a siRNA \u0111\u01b0\u1ee3c th\u1eeba h\u01b0\u1edfng t\u1eeb c\u00e2y m\u1eb9 ph\u00e1t tri\u1ec3n l\u1edbn t\u1edbi m\u1ee9c b\u1ecb d\u1ec5 b\u1ecb \u0111\u1ed5.\/.<\/p>\n

Theo T\u1ea1p ch\u00ed H\u0110KH<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

K\u00edch th\u01b0\u1edbc h\u1ea1t gi\u1ed1ng \u0111\u01b0\u1ee3c \u0111i\u1ec1u khi\u1ec3n b\u1edfi c\u00e1c ph\u00e2n t\u1eed ARN nh\u1ecf \u0111\u01b0\u1ee3c di truy\u1ec1n t\u1eeb c\u00e2y b\u1ed1 m\u1eb9. Nghi\u00ean c\u1ee9u c\u1ee7a c\u00e1c nh\u00e0 khoa h\u1ecdc thu\u1ed9c \u0110\u1ea1i h\u1ecdc Texas n\u00e0y c\u00f3 \u00fd ngh\u0129a l\u1edbn \u0111\u1ed1i v\u1edbi n\u1ec1n n\u00f4ng nghi\u1ec7p v\u00e0 s\u1ef1 hi\u1ec3u bi\u1ebft v\u1ec1 ti\u1ebfn h\u00f3a c\u1ee7a c\u00e2y tr\u1ed3ng. \u0110\u0103ng ng\u00e0y 01-06-2012 trong […]\n","protected":false},"author":1,"featured_media":6462,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[87],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/nbca.gov.vn\/wp-json\/wp\/v2\/posts\/6583"}],"collection":[{"href":"https:\/\/nbca.gov.vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nbca.gov.vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nbca.gov.vn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nbca.gov.vn\/wp-json\/wp\/v2\/comments?post=6583"}],"version-history":[{"count":0,"href":"https:\/\/nbca.gov.vn\/wp-json\/wp\/v2\/posts\/6583\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbca.gov.vn\/wp-json\/wp\/v2\/media\/6462"}],"wp:attachment":[{"href":"https:\/\/nbca.gov.vn\/wp-json\/wp\/v2\/media?parent=6583"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbca.gov.vn\/wp-json\/wp\/v2\/categories?post=6583"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbca.gov.vn\/wp-json\/wp\/v2\/tags?post=6583"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}