Tr\u00ean ru\u1ed9ng l\u00faa, ch\u00fang ta c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y m\u1ed9t lo\u1ea1i l\u00faa m\u1edbi, s\u1ea3n ph\u1ea9m n\u00e0y m\u1ecdc r\u1ea5t cao to, th\u00e2n th\u00f4 kho\u1ebb, sinh tr\u01b0\u1edfng \u0111\u1eb7c bi\u1ec7t d\u1ed3i d\u00e0o. Khi tr\u1ed5 b\u00f4ng ch\u00edn h\u00ecnh d\u00e1ng b\u00f4ng c\u0169ng to h\u01a1n, b\u00f4ng ch\u1ee7 to nh\u1ea5t k\u1ebft h\u01a1n 400 h\u1ea1t, s\u1ea3n ph\u1ea9m m\u1edbi ch\u00ednh l\u00e0 l\u00faa lai.<\/p>\n\n\n\n
Mu\u1ed1n \u0111\u1ea1t \u0111\u01b0\u1ee3c l\u01b0\u1ee3ng l\u1edbn gi\u1ed1ng l\u00faa lai kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t vi\u1ec7c d\u1ec5, trong qu\u00e1 tr\u00ecnh g\u00e2y gi\u1ed1ng ho\u00e0n th\u00e0nh s\u1ef1 k\u1ebft h\u1ee3p \u0111\u1ed3ng b\u1ed9 “ba h\u1ec7”, trong s\u1ea3n xu\u1ea5t m\u1edbi c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng \u1ee9ng d\u1ee5ng.<\/p>\n\n\n\n
S\u1ef1 k\u1ebft h\u1ee3p \u0111\u1ed3ng b\u1ed9 “ba h\u1ec7” \u0111\u00f3 l\u00e0 g\u00ec?<\/p>\n\n\n\n
L\u00faa lai \u0111\u01b0\u1ee3c t\u1ea1o ra th\u00f4ng qua s\u1ef1 t\u1ea1p giao gi\u1eefa c\u00e1c gi\u1ed1ng l\u00faa kh\u00e1c nhau, m\u00e0 l\u00faa l\u00e0 s\u1ea3n ph\u1ea9m n\u00f4ng nghi\u1ec7p t\u1ef1 th\u1ee5 ph\u1ea5n, b\u1ea5t l\u1ee3i cho vi\u1ec7c ph\u1ed1i h\u1ee3p lai t\u1ea1o gi\u1ed1ng. Mu\u1ed1n ti\u1ebfn h\u00e0nh t\u1ea1p giao hai lo\u1ea1i gi\u1ed1ng l\u00faa kh\u00e1c nhau, tr\u01b0\u1edbc ti\u00ean ph\u1ea3i ti\u1ebfn h\u00e0nh nh\u00e2n t\u1ea1o ng\u1eaft b\u1ecf ho\u1eb7c gi\u1ebft ch\u1ebft nh\u1ecb \u0111\u1ef1c c\u1ee7a m\u1ed9t s\u1ea3n ph\u1ea9m, sau \u0111\u00f3 l\u1ea5y ph\u1ea5n hoa nh\u1ecb \u0111\u1ef1c c\u1ee7a s\u1ea3n ph\u1ea9m kia th\u1ee5 ph\u1ea5n l\u00ean s\u1ea3n ph\u1ea9m b\u1ecb ng\u1eaft b\u1ecf nh\u1ecb \u0111\u1ef1c, nh\u01b0 v\u1eady m\u1edbi kh\u00f4ng xu\u1ea5t hi\u1ec7n l\u00faa lai gi\u1ea3 c\u1ee7a s\u1ea3n ph\u1ea9m \u0111\u00e3 b\u1ecb ng\u1eaft nhu\u1ef5 \u0111\u1ef1c t\u1ef1 th\u1ee5 ph\u1ea5n th\u00e0nh. Nh\u01b0ng n\u1ebfu ch\u00fang ta d\u00f9ng ph\u01b0\u01a1ng ph\u00e1p nh\u00e2n t\u1ea1o ti\u1ebfn h\u00e0nh th\u1ee5 ph\u1ea5n ng\u1eaft b\u1ecf nhu\u1ef5 \u0111\u1ef1c tr\u00ean l\u01b0\u1ee3ng l\u1edbn nh\u1eefng b\u00f4ng l\u00faa, l\u01b0\u1ee3ng c\u00f4ng vi\u1ec7c c\u1ef1c k\u00ec l\u1edbn, th\u1ef1c t\u1ebf kh\u00f4ng th\u1ec3 gi\u1ea3i quy\u1ebft vi\u1ec7c s\u1ea3n xu\u1ea5t l\u01b0\u1ee3ng gi\u1ed1ng l\u1edbn nh\u01b0 v\u1eady. V\u00ec v\u1eady qua nghi\u00ean c\u1ee9u, t\u1ea1o ra m\u1ed9t lo\u1ea1i l\u00faa l\u00e0m c\u00e2y m\u1eb9, c\u00e2y m\u1eb9 c\u00f3 c\u00e1 t\u00ednh \u0111\u1eb7c bi\u1ec7t, nhu\u1ef5 \u0111\u1ef1c c\u1ee7a n\u00f3 g\u1ea7y nh\u1ecf tho\u00e1i ho\u00e1, bao ph\u1ea5n nhu\u1ef5 \u0111\u1ef1c c\u1ee7a hoa kh\u00f4 qu\u1eaft l\u1ea1i, kh\u00f4ng th\u1ec3 th\u1ee5 tinh h\u1ebft h\u1ea1t b\u1eb1ng ph\u1ea5n hoa c\u1ee7a m\u00ecnh \u0111\u01b0\u1ee3c.<\/p>\n\n\n\n
\u0110\u1ec3 kh\u00f4ng cho c\u00e2y m\u1eb9 b\u1ecb m\u1ea5t \u0111\u1eddi sau, ph\u1ea3i t\u00ecm cho n\u00f3 hai \u0111\u1ed1i t\u00e1c, \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a hai \u0111\u1ed1i t\u00e1c n\u00e0y kh\u00e1c nhau: \u0111\u1ed1i t\u00e1c m\u1ed9t h\u00ecnh d\u00e1ng b\u00ean ngo\u00e0i gi\u1ed1ng c\u00e2y m\u1eb9, nh\u01b0ng c\u00f3 ph\u1ea5n hoa kho\u1ebb v\u00e0 m\u1ed9t \u0111\u1ea7u nhu\u1ef5 c\u00e1i ph\u00e1t tri\u1ec3n, sau khi d\u00f9ng ph\u1ea5n hoa c\u1ee7a n\u00f3 th\u1ee5 ph\u1ea5n cho c\u00e2y m\u1eb9, s\u1ea3n ph\u1ea9m \u0111\u01b0\u1ee3c t\u1ea1o ra l\u00e0 m\u1ed9t c\u00e2y con g\u00e1i, l\u1edbn gi\u1ed1ng h\u1ec7t c\u00e2y m\u1eb9, c\u0169ng l\u00e0 m\u1ed9t c\u00e2y m\u1eb9 m\u1edbi c\u00f3 nhu\u1ef5 \u0111\u1ef1c g\u1ea7y nh\u1ecf, tho\u00e1i ho\u00e1, bao ph\u1ea5n kh\u00f4 qu\u1eaft l\u1ea1i, kh\u00f4ng c\u00f3 kh\u1ea3 n\u0103ng sinh d\u1ee5c; \u0111\u1ed1i t\u01b0\u1ee3ng hai d\u00e1ng v\u1ebb b\u00ean ngo\u00e0i l\u1ea1i kh\u00e1c c\u00e2y m\u1eb9, th\u01b0\u1eddng ph\u1ea3i cao h\u01a1n c\u00e2y m\u1eb9, c\u00f3 cu\u1ed1ng hoa kho\u1ebb v\u00e0 \u0111\u1ea7u nhu\u1ef5 c\u00e1i ph\u00e1t tri\u1ec3n, sau khi d\u00f9ng ph\u1ea5n hoa c\u1ee7a n\u00f3 th\u1ee5 ph\u1ea5n cho c\u00e2y m\u1eb9 m\u1edbi, s\u1ea3n ph\u1ea9m \u0111\u01b0\u1ee3c t\u1ea1o ra l\u00e0 m\u1ed9t c\u00e2y con trai, l\u1edbn h\u01a1n c\u00e2y b\u1ed1 v\u00e0 c\u00e2y m\u1eb9; \u0111\u00e2y ch\u00ednh l\u00e0 l\u00faa lai m\u00e0 ch\u00fang ta c\u1ea7n. M\u1ed9t c\u00e2y m\u1eb9 v\u00e0 hai \u0111\u1ed1i t\u01b0\u1ee3ng, ng\u01b0\u1eddi ta c\u0103n c\u1ee9 v\u00e0o \u0111\u1eb7c \u0111i\u1ec3m kh\u00e1c nhau c\u1ee7a m\u1ed7i lo\u1ea1i, l\u1ea7n l\u01b0\u1ee3t \u0111\u1eb7t ba t\u00ean: c\u00e2y m\u1eb9 \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 h\u1ec7 kh\u00f4ng ph\u00e1t d\u1ee5c, hai c\u00e2y \u0111\u1ed1i t\u00e1c, m\u1ed9t c\u00e2y g\u1ecdi l\u00e0 h\u1ec7 duy tr\u00ec, m\u1ed9t c\u00e2y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 h\u1ec7 kh\u00f4i ph\u1ee5c, g\u1ecdi t\u1eaft l\u00e0 “3 h\u1ec7”. C\u00f3 s\u1ef1 k\u1ebft h\u1ee3p c\u1ee7a “3 h\u1ec7”, ch\u00fang ta s\u1ebd bi\u1ebft trong s\u1ea3n xu\u1ea5t l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u1ea1o ra l\u00faa lai: ph\u1ea3i tr\u1ed3ng m\u1ed9t m\u1ea3nh ru\u1ed9ng sinh s\u00f4i v\u00e0 m\u1ed9t m\u1ea3nh \u0111\u1ea5t g\u00e2y gi\u1ed1ng, m\u1ea3nh ru\u1ed9ng sinh s\u00f4i tr\u1ed3ng c\u00e2y h\u1ec7 duy tr\u00ec nh\u1edd s\u1ee9c gi\u00f3 truy\u1ec1n \u0111\u1ebfn h\u1ec7 kh\u00f4ng ph\u00e1t d\u1ee5c, h\u1ec7 kh\u00f4ng ph\u00e1t d\u1ee5c s\u1ebd th\u1ee5 ph\u1ea5n k\u1ebft qu\u1ea3 b\u00ecnh th\u01b0\u1eddng, \u0111\u1eddi sau \u0111\u01b0\u1ee3c t\u1ea1o ra v\u1eabn l\u00e0 h\u1ec7 kh\u00f4ng ph\u00e1t d\u1ee5c, \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u1ee5c \u0111\u00edch sinh s\u00f4i h\u1ec7 kh\u00f4ng ph\u00e1t d\u1ee5c. Ch\u00fang ta c\u00f3 th\u1ec3 l\u1ea5y h\u1ea1t gi\u1ed1ng h\u1ec7 kh\u00f4ng ph\u00e1t d\u1ee5c n\u00e0y, gi\u1eef l\u1ea1i m\u1ed9t ph\u1ea7n \u0111\u1ec3 ti\u1ebfp t\u1ee5c sinh s\u00f4i, ph\u1ea7n kia th\u00ec g\u00e2y gi\u1ed1ng c\u00f9ng v\u1edbi h\u1ec7 kh\u00f4i ph\u1ee5c, khi h\u1ec7 kh\u00f4ng ph\u00e1t d\u1ee5c v\u00e0 h\u1ec7 kh\u00f4i ph\u1ee5c trong ru\u1ed9ng g\u00e2y gi\u1ed1ng \u0111\u1ec1u ra hoa, ph\u1ea5n hoa c\u1ee7a h\u1ec7 kh\u00f4i ph\u1ee5c truy\u1ec1n sang h\u1ec7 kh\u00f4ng ph\u00e1t d\u1ee5c, \u0111\u1eddi sau h\u1ec7 kh\u00f4ng ph\u00e1t d\u1ee5c t\u1ea1o ra ch\u00ednh l\u00e0 l\u00faa lai tr\u1ed3ng trong ru\u1ed9ng gi\u1ed1ng. Do nhu\u1ef5 \u0111\u1ef1c v\u00e0 nhu\u1ef5 c\u00e1i c\u1ee7a b\u1ea3n th\u00e2n h\u1ec7 duy tr\u00ec v\u00e0 h\u1ec7 kh\u00f4i ph\u1ee5c \u0111\u1ec1u b\u00ecnh th\u01b0\u1eddng m\u1ed7i lo\u1ea1i t\u1ef1 ti\u1ebfn h\u00e0nh th\u1ee5 ph\u1ea5n, cho n\u00ean h\u1ea1t gi\u1ed1ng m\u1ed7i lo\u1ea1i k\u1ebft ra v\u1eabn l\u00e0 \u0111\u1eddi sau c\u1ee7a h\u1ec7 duy tr\u00ec v\u00e0 h\u1ec7 kh\u00f4i ph\u1ee5c. \u0110\u00e2y l\u00e0 s\u1ef1 s\u1eafp x\u1ebfp th\u1eadt khoa h\u1ecdc.<\/p>\n","protected":false},"excerpt":{"rendered":"
Tr\u00ean ru\u1ed9ng l\u00faa, ch\u00fang ta c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y m\u1ed9t lo\u1ea1i l\u00faa m\u1edbi, s\u1ea3n ph\u1ea9m n\u00e0y m\u1ecdc r\u1ea5t cao to, th\u00e2n th\u00f4 kho\u1ebb, sinh tr\u01b0\u1edfng \u0111\u1eb7c bi\u1ec7t d\u1ed3i d\u00e0o. Khi tr\u1ed5 b\u00f4ng ch\u00edn h\u00ecnh d\u00e1ng b\u00f4ng c\u0169ng to h\u01a1n, b\u00f4ng ch\u1ee7 to nh\u1ea5t k\u1ebft h\u01a1n 400 h\u1ea1t, s\u1ea3n ph\u1ea9m m\u1edbi ch\u00ednh l\u00e0 l\u00faa lai. Mu\u1ed1n […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[15,19],"tags":[],"class_list":["post-9826","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-tu-nhien"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/9826","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=9826"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/9826\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=9826"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=9826"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=9826"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}