Sunflower seeds with high delta-tocopherol content

Details Sunflower seeds with high delta-tocopherol content Sunflower seeds with high delta-tocopherol content

A - Human Necessities

01

H

A01H 5/00 (2006.01) A01H 1/06 (2006.01) A01H 5/10 (2006.01)

Patent

CA 2521772

The present invention relates to sunflower seeds which have been genetically modified through two artificial induction cycles of mutations followed in each case by processes for the identification of mutant individuals which have the desired character. The disclosed seeds are characterized in that they contain between 26 % and 80 % of the tocopherols as delta-tocopherol. This high delta- tocopherol production is determined by the genotype of the seeds which have been modified to this effect, and is always obtained independently of the culture conditions, thereby obtaining an inheritable character. Today, sunflower seeds producing such high levels of delta-tocopherol do not exist. Genetically modified sunflower plants which produce through self-fertilization seeds with high delta-tocopherol levels and the oil with high natural delta- tocopherol concentration, extracted from the seeds, are also objectives of the present invention.

La présente invention concerne des graines de tournesol génétiquement modifiées au cours de deux cycles d'induction artificielle de mutations, suivis dans chaque cas de processus d'identification d'individus mutants possédant une caractéristique désirée. Lesdites graines se caractérisent en ce que 26 à 80 % de ses tocophérols sont des delta-tocophérols. Cette production élevée de delta-tocophérols est déterminée par le génotype des graines, qui a été modifié à cette fin, et se produit toujours indépendamment des conditions de culture, ce qui en fait, par conséquent, une caractéristique héréditaire. Il n'existe pas à l'heure actuelle de graines de tournesol produisant des niveaux de delta-tocophérols aussi élevés. L'invention concerne également des plantes de tournesol génétiquement modifiées autofécondées permettant d'obtenir des graines avec des niveaux élevés de delta-tocophérols, ainsi que l'huile possédant une concentration naturelle élevée de delta-tocophérols extraite de leurs graines.

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