Genetic Background and Environment Influence Palmitate Content of Soybean Seed Oil
- 1 November 2001
- journal article
- Published by Wiley in Crop Science
- Vol. 41 (6), 1731-1736
- https://doi.org/10.2135/cropsci2001.1731
Abstract
Dietary concerns over high saturates contained in edible vegetable oils has stimulated development of soybean [Glycine max (L.) Merr.] cultivars with reduced palmitate content. Little is known of factors that might influence phenotypic expression of palmitate content among soybean populations varying for presence of a major reduced palmitate allele. The objective of this study was to investigate how environment and genetic background influence palmitate content when introducing the reduced palmitate trait into adapted backgrounds. Crosses were made between reduced palmitate germplasm, N87-2122-4 (53 g kg−1 palmitate) and normal palmitate cultivars, A3733, Burlison, Kenwood, P9273, and P9341 (103–123 g kg−1 palmitate). For each cross, F4:6 lines homozygous for major reduced or normal palmitate alleles were bulked separately into Maturity Groups (MG) II, III, IV, and V, and evaluated in 10 contrasting field environments during 1993. Palmitate content varied between 82 and 90 g kg−1 across southern U.S. and Puerto Rican environments. Much of this environmental variation was associated with changes in minimum temperature during the growing season. Genetic background effects were highly significant (P < 0.01) with cross means for palmitate content ranging between 81 and 93 g kg−1 Across different maturity groups, palmitate content of the progeny was correlated (r = 0.94–0.99, P < 0.05) with mean content of the normal palmitate parent, such that for every 1 g kg−1 palmitate increase in the normal palmitate parent there was a 0.32 to 0.51 g kg−1 palmitate increase in the progeny. Genetic background effects were presumed to be associated with action of minor alleles transmitted from the normal palmitate parent. Presence of the reduced palmitate allele was associated with significantly (P < 0.01) lower stearate (−6 to −13%) and higher oleate (+4 to +10%) contents across all maturity groups. Selection of low palmitate, high-yielding parents should further decrease palmitate content and produce correlated improvements in stearate and oleate contents to improve overall oil quality in progeny containing reduced palmitate alleles. Copyright © 2001. Crop Science Society of America . Published in Crop Sci.41:1731–1736.Keywords
This publication has 17 references indexed in Scilit:
- Genetic Variation for Modifiers Controlling Reduced Saturated Fatty Acid Content in SoybeanCrop Science, 1998
- Early‐Maturing Soybean Cropping System: III. Protein and Oil Contents and Oil CompositionAgronomy Journal, 1997
- Transgressive Segregation for Palmitic Acid in Seed Oil of SoybeanCrop Science, 1994
- Molecular Markers Associated with Maize Kernel Oil Concentration in an Illinois High Protein × Illinois Low Protein CrossCrop Science, 1994
- Genetic Control of Reduced Palmitate Content in SoybeanCrop Science, 1994
- Registration of N79‐2077‐12 and N87‐2122‐4, Two Soybean Germplasm Lines with Reduced Palmitic Acid in Seed OilCrop Science, 1994
- Registration of N88‐480, a Soybean Germplasm Line with a High Concentration of Oil in SeedsCrop Science, 1994
- Normal and Low Linolenic Acid Soybean Strains: Response to Planting DateCrop Science, 1992
- Comparison of Monounsaturated Fatty Acids and Carbohydrates for Lowering Plasma CholesterolNew England Journal of Medicine, 1986
- Progress in the Selection for Altered Fatty Acid Composition in Soybeans1Crop Science, 1981