Breeders are facing the challenge of increasing oilseed crop production worldwide,in a wide range of environmental constraints,especially for oilseed rape (Brassica napus).In this context,improving seed vigour,a seed quality trait characterizing the successful establishment of seedlings from a seed lot under various environmental conditions,has now become a major issue in breeding.However,the molecular mechanisms underlying seed vigour in Brassica napus still remain unknown.