The present invention relates to plants, seeds and products derived thereof ,in particular to Brassica plants, seedsproducts derived thereof , that have mutant sequences conferring high oleicacid profile on the seed oil. More particularly, theinvention relates to mutant delta-12 fatty acid desaturase sequences, alsoreferred to herein as FAD2 sequences, in such plants whichconfer high oleic acid profile on the seed oil.