Resource Allocation in Breeding for Fatty Acid Composition of Soybean Oil<sup>1</sup>

Hawkins, S. E.; Fehr, W. R.; Hammond, Earl G.

doi:10.2135/cropsci1983.0011183x002300050021x

Cited by 28 publications

(16 citation statements)

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“…Since oleic acid in soybean oil was found to be quantitatively inherited (Burton et al, 1983; Hawkins et al, 1983; Carver et al, 1987), research has been limited on this fatty acid. Recently, Rahman et al (1994) developed a mutant (M23) with about 500 g kg −1 oleic acid.…”

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Combining Ability in Loci for High Oleic and Low Linolenic Acids in Soybean

et al. 2001

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Two soybean [Glycine max (L.) Merr.] germplasm lines have been identified for unique fatty acid content. The contents of oleic and linolenic acids in HOLL are controlled by ol and fan loci, respectively, and the very low content of linolenic acid in LOLL is controlled by fan and fanxa loci combined. The fan locus is identical for both HOLL and LOLL. Therefore, if ol and fanxa loci are independent, soybean germplasm could be developed with more unique and useful combinations of these fatty acids. The objectives of this study were to combine the loci of high oleic and low linolenic acids, and determine the effects of altered contents of oleic and linolenic acids on other fatty acids. HOLL was reciprocally crossed to LOLL. The data from F2 seed indicated that the ol locus controlling high oleic acid was independently inherited from the fanxa locus controlling low linolenic acid. Thus, the germplasm (DHL) with the high oleic acid trait from HOLL, and very low linolenic acid trait from LOLL, was easily developed. The increases in oleic acid due to ol was associated completely with changes in linoleic acids, indicating a pleiotropic effect of the ol locus. Decreases in linolenic acid due to fan and fanxa were associated primarily with increases in linoleic acid. The development of DHL with increased contents of oleic acid and decreased contents of polyunsaturated fatty acids could open new markets for soybean oil.

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Combining Ability in Loci for High Oleic and Low Linolenic Acids in Soybean

et al. 2001

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“…33 In the US in the early 1970s soybean genotypes with altered seed fatty acid composition were described, which ultimately led to the commercial development of low linolenic acid varieties. 3,34 Moreover, phenotypic and genotypic analyses of these soybean genotypes led to the identification of alleles that govern the control of oleic acid abundance in seed. 35 The enzymes that control the synthesis and desaturation of fatty acids in the developing soybean seed have been elucidated (Figure 8.1).…”

Section: Breeding Approaches To Improving Soybean-oil Qualitymentioning

confidence: 99%

Soybeans

Kinney

Clemente

2010

Energy Crops

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For most of their 300 year domesticated history soybeans have been grown to feed humans and animals. In the last decade there has been increasing use of soybean oil (which constitutes about 20% of the seed) for energy, in the form of methyl ester biodiesel. Soybean biodiesel, while more expensive to produce than petroleum diesel, offers a number of advantages over all petrochemical fuels, including increased fuel performance, lower carbon emissions and biodegradability. Soybean biodiesel use is limited by the functional properties of soybean oil, cost and oil supply. The oxidative instability of soybean oil will compromise ignition performance. Saturated fatty acids reduce the cold flow properties of soybean biodiesel and limit its use in cold environments. High oleic, low palmitic acid soybean oil addresses these functional limitations. Efforts by plant breeders over a 30 year period has resulted in high oleic, low palmitic acid soybean lines but they have not been commercialized due to the breeding challenges associated with pyramiding multigenic factors, required for full penetration of the target trait and the observed instability of the phenotype across environments, as well as poor agronomic performance of the crop. On the other hand, using the tools of biotechnology, single locus, environmentally stable, high oleic, low palmitic acid soybean lines have been produced in high performing elite varieties. These varieties are being commercialized by major seed companies. The methyl ester biodiesel from these lines has improved functional properties including cold flow characteristics similar to petroleum diesel. Future biotechnology efforts will be directed towards improving the oil yield of the soybean crop.

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“…Wilcox et al (1984) used EMS to create a recessive fanfan C1640 germplasm line with approx 3.5% 18:3. Germplasm line A5 was also created by chemical mutagenesis producing the fan 1 fan 1 genotype, conferring approximately 4% 18:3 (Hawkins et al 1983). Fehr et al (1992) were able to combine two additional mutations forming germplasm line A29 with three recessive alleles fan 1 fan 1 fan 2 fan 2 fan 3 fan 3 .…”

Section: Reduced 18:3 -Germplasm and Biotechnologiesmentioning

confidence: 99%