Method for modifying insect resistance of plants by...

C - Chemistry – Metallurgy – 12 – N

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C12N 15/82 (2006.01) A01H 1/00 (2006.01) C07H 21/00 (2006.01) C12N 5/14 (2006.01) C12N 15/11 (2006.01)

Patent

CA 2671425

A method for improving insect resistance of plants, in which dsRNA of insect's gene is expressed in plants by using transgenic technique, and then the interfering RNAs are formed in the plants. The interfering RNAs then enter into insects' bodies after ingested by the insects that eat plant, and conduct RNA interference against the target gene. Therefore the expression of the target gene is suppressed by RNA interference. A new plant-mediated method for improving insect resistance by suppressing the growth of insects by RNA interference mechanism.

La présente invention concerne un procédé d'amélioration de la résistance de plantes aux insectes, selon lequel l'ARNds de gène d'insecte est exprimé dans des plantes grâce à l'utilisation de technique transgénique, suivie de la formation d'ARN interférence dans des plantes. Les ARN d'interférence pénètrent ensuite dans les organismes d'insectes après l'ingestion par les insectes qui mangent des plantes, et conduisent l'ARN interférence contre le gène cible. Par conséquent, l'expression du gène cible est supprimée par l'ARN interférence. L'invention concerne également un nouveau procédé médié par des plantes pour améliorer la résistance aux insectes en supprimant la croissance d'insectes par le mécanisme d'ARN interférence.

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