Crop Science Journal of Natural Resources and Life Sciences Education
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Published in Crop Sci 24:1016-1019 (1984)
© 1984 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Developmental Changes in Acyl-Composition of Soybean Seed Selected for High Oleic Acid Concentration1

Brett F. Carver, Richard F. Wilson and Joseph W. Burton2

Recurrent selection methodology has been utilized in the development of a soybean [Glycine max (L.) Merr.] genotype, designated as N78-2245, that contains a high concentration of oleic acid (18:1) and lower concentrations of linoleic (18:2) and linolenic (18:3) acids compared to seed from typical soybean cultivars. The nature of fatty acid metabolism and deposition during the ontogeny of soybean seed with the high-18:l trait has not been shown previously. The objective of this study was to determine how expression of the high-18:l trait affected lipid composition during seed development. To achieve that objective fatty acid synthesis and composition were evaluated in seed of N78-2245 and ‘Dare’, a typical soybean cultivar, at 15-day intervals during reproductive growth. In N78-2245 seed the greatest amount of 18:1 accumulateduring the period from 30 to 45 days after flowering. The amount of 18:1 deposited in that period was three-times greater than that deposited in Dare. In the intervals after 45 days after flowering, 18:1 deposition declined in N78-2245 seed with a concommitant increase in 18:2 and 18:3. The abrupt shift in net accumulation of 18:1 and 18:2 plus 18:3 during N78-2245 seed ontogeny was attributed to developmental rather than environmental causes. These data have shown that late developmental increases in 18:2 and 18:3 deposition significantly affected the total unsaturated fatty acid composition of mature N78-2245 seed.

Key Words: Glycine max (L.) Merr. • Linolenic acid • Lipid composition • Fatty acid

1 Cooperative investigations of the USDA-ARS, and North Carolina Agric. Res. Serv., Raleigh, NC; and sponsored in part by Grant no. 80465 from the Research Foundation of the Am. Soybean Assoc. This research represents partial fulfillment of the M. S. degree of B. F. Carver. Paper no.-8788 of the Journal Series of the North Carolina Agric. Res. Serv. at Raleigh.

2 Research assistant, crop science; supervisory plant physiologist, USDA-ARS, and associate professor of crop science; and research agronomist, USDA-ARS, ahd associate professor of crop science, North Carolina State Univ., Raleigh, NC 27695-7620, respectively.

Received for publication April 18, 1983.


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Phenotypic Diversity of Modern Chinese and North American Soybean Cultivars
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[Abstract] [Full Text] [PDF]


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