Submitted to: American Oil Chemists' Society Meeting
Publication Type: Abstract Only
Publication Acceptance Date: 5/6/2002
Publication Date: N/A
Technical Abstract: There is ample evidence in the literature that growing conditions affect the composition of the seed resulting in variation in seed composition across locations and years. There are few long-term comparisons of year-to-year variation in composition of seeds of major oil seed crops and a study to compare year-to-year variation in oil and protein concentration in soybean, canola-rape, and flax, grown in the United States and Canada are reported here. Soybean oil and protein data were obtained from 51 years of Uniform Soybean Tests, Northern and Southern Regions and canola and flax data were obtained from 43 years of Canadian Grain Commission grower's surveys. Comparison of oil concentration and protein concentration in the Uniform Soybean Tests, Northern and Southern Regions showed they increased or decreased together from their previous years values in 36 of the 50 years and 33 of 50 years, respectively. Comparison of canola-rape and flax oil concentration and protein concentration showed they increased or decreased together from their previous years values in 32 of the 42 years and 38 of 42 years, respectively. Comparison of oil to protein ratios of canola-rape and flax showed that they increased or decreased together in 42 of the 43 years. These data indicate that climate strongly influences the year-to-year concentration of oil and protein in three major oil seed crops grown in the United States and Canada over a large geographical area.