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Developmental Changes in Acyl‐Composition of Soybean Seed Selected for High Oleic Acid Concentration 1
Author(s) -
Carver Brett F.,
Wilson Richard F.,
Burton Joseph W.
Publication year - 1984
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1984.0011183x002400060003x
Subject(s) - biology , linolenic acid , linoleic acid , cultivar , ontogeny , oleic acid , glycine , composition (language) , zoology , fatty acid , botany , agronomy , biochemistry , amino acid , genetics , linguistics , philosophy
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.