Canola oil from seeds with reduced glucosinolates and linolenic acid

Abstract

A canola line has been stabilized to produce seeds having an α-linolenic acid content of less than that of generic canola oil, more preferably less than or equal to about 7% α-linolenic acid relative to total fatty acid content of said seed and a total glucosinolate content of less than 18 μmol/g of defatted meal, more preferably less than or equal to about 15 μmol/g of defatted meal. This canola line has reduced sulfur content of less than or equal to 3.0 ppm, improved sensory characteristics and increased oxidative stability.

What is claimed is:  
     
         1 . A  Brassica napus  plant comrising 
 seed having a total glucosinolates content of about 18 μmol/g or less of defatted, air-dried meal;    the seed yielding oil having an α-linolenic acid content of 7% or less relative to total fatty acid content of said seed and a sulfur content of less than or equal to 3.0 ppm; and    the plant belonging to a line in which these traits have been stabilized for both the generation to which the seed belongs and that of its parent generation.    
     
     
         2 . The seed produced by the plant of  claim 1 .  
     
     
         3 . The seed produced by the plant of  claim 1  wherein total glucosinate content is about 15 μmol/g or less of defatted, air-dried meal.  
     
     
         4 . The oil of the seed produced by the plant of  claim 1 .  
     
     
         5 . A  Brassica napus  plant designated IMC 01 represented by seed deposited with the ATCC and bearing accession number 40579.  
     
     
         6 . The oil produced from the variety of  claim 5 .  
     
     
         7 . A  Brassica napus  seed yielding canola oil having, when hydrogenated, significantly reduced overall room-odor intensity relative to the overall room-odor intensity of generic canola oil, a significant difference in overall room odor-intensity indicated by a difference of greater than 1.0 obtained in a standardized sensory evaluation.  
     
     
         8 . A  Brassica napus  comprising oil, which when non-hydrogenated, is significantly reduced in fishy odor intensity relative to the fishy odor intensity of generic canola oil, a significant difference in fishy odor intensity indicated by a difference of greater than 1.0 obtained in standardized sensory evaluation.  
     
     
         9 . A  Brassica napus  plant wherein at least one parent was the variety of claims  1  or  5 .  
     
     
         10 . The progeny of the plant of claims  1 ,  5  or  9 .  
     
     
         11 . A plant produced from the crossing of IMC 01 with an agronomically elite variety of  Brassica napus , the plant yielding a seed having a total glucosinolates content of about 18 μmol/g or less of defatted, air-dried meal, said seed yielding extractable oil having (1) an α-linolenic acid content of about 7% or less relative to total fatty acid content of said seed, and (2) a sulfur content of less than or equal to 3.0 ppm.  
     
     
         12 . The plant of  claim 11 , wherein the agronomically elite parent is the Canadian canola line, Westar.  
     
     
         13 . A process for producing a canola of enhanced commercial utility comprising: 
 (a) crossing the  Brassica napus  IMC 01 with an agronomically elite variety;    (b) selecting the off-spring of step (a) which yield a seed having a total glucosinolates content of about 18 μmol/g or less of defatted, air-dried meal, said seed yielding extractable oil having (1) an α-linolenic acid content of about 7% or less relative to total fatty acid content of said seed, and (2) a sulfur content of less than or equal to 3.0 ppm.    
     
     
         14 . The oil extracted from the seed produced by the process of  claim 13 .  
     
     
         15 . A method of using the  Brassica napus  IMC 01 comprising: 
 (a) crossing IMC 01 with an agronomically elite variety;    (b) selecting the off-spring of step (a) which yield a seed having a total glucosinolates content of about 18 μmol/g or less of defatted, air-dried meal, said seed yielding extractable oil having (1) an α-linolenic acid content of about 7% or less relative to total fatty acid content of said seed, and (2) a sulfur content of less than or equal to 3.0 ppm;    (c) producing sufficient progeny of the seed selected in step (b) to extract oil.    
     
     
         16 . The  Brassica napus  designated HW 3.001, a progeny line of the cross of IMC 01 with Westar.  
     
     
         17 . An improved vegetable oil extracted from  Brassica napus  seeds, said seeds having: 
 (1) an oil which exhibits following crushing and extraction 
 (a) an α-linolenic acid content of 7% or less relative to total fatty acid content of said seed;  
 (b) a sulfur content of less than or equal to 3.0 ppm; and  
   (2) a total glucosinolates content of about 18 μmol/g or less of defatted, air-dried meal.    
     
     
         18 . The oil produced from the progeny of  claim 1 ,  5  or  9 , as described in  claim 10 , wherein the stability of such oil measured in AOM hours is from about 25.0 to about 35.0.  
     
     
         19 . The oil as described by  claim 18  wherein the stability in AOM hours is from 26.8 to 31.5.