Patent ID: 8049064

Claim:
A process for the production of polyunsaturated C 20 - or C 22 -fatty acids with at least four double bonds in transgenic plants with a content of at least 15% by weight based on the total triglyceride content of the transgenic plants comprising: a) introducing, into the transgenic plant, a nucleic acid construct which comprises nucleic acid sequences which code for a Δ6-desaturase, a Δ6-elongase and a Δ5-desaturase, or b) introducing, into the transgenic plant, a nucleic acid construct which comprises nucleic acid sequences which code for a Δ6-desaturase, a Δ6-elongase, a Δ5-desaturase, a Δ12-desaturase and ω3-desaturase, or c) introducing, into the transgenic plant, a nucleic acid construct which comprises nucleic acid sequences which code for a Δ6-desaturase, a Δ6-elongase, a Δ5-desaturase, a Δ5-elongase and Δ4-desaturase, or d) introducing, into the transgenic plant, a nucleic acid construct which comprises nucleic acid sequences which code for a Δ6-desaturase, a Δ6-elongase, a Δ5-desaturase, a Δ5-elongase, Δ4-desaturase, a Δ12-desaturase and ω3-desaturase, and e) obtaining the oils or lipids from the plants, wherein the oils or lipids comprise polyunsaturated C 20 - or C 22 -fatty acids with at least four double bonds with a content of at least 15% by weight based on the total triglyceride content; and wherein the nucleic acid construct comprises a nucleic acid sequence which comprises the sequence of SEQ ID NO: 25 or a nucleic acid sequence encoding a polypeptide comprising the amino acid sequence of SEQ ID NO: 26 or a nucleic acid sequence encoding a polypeptide comprising an amino acid sequence having at least 95% sequence identity with the sequence of SEQ ID NO: 26.