title: Seed oil and fatty acid content in okra (Abelmoschus esculentus) and related species.
abstract: Approximately 1100 genebank accessions of okra (Abelmoschus esculentus) and 540 additional accessions that included six of its related species-A. caillei, A. crinitis, A. esculentus, A. ficulneus, A. manihot, A. moschatus and A. tuberculatus-were evaluated for seed oil content using time domain NMR (TD-NMR). Oil content in seed of A. caillei, A. esculentus, A. ficulneus, A. manihot, A. moschatus and A. tuberculatus was in the ranges 2.51-13.61%, 12.36-21.56%, 6.62-16.7%, 16.1-22.0%, 10.3-19.8% and 10.8-23.2%, respectively. Accession PI639680 (A. tuberculatus) had the highest seed oil content (∼23%). Accessions of A. esculentus with high seed oil content included PI nos. PI274350 (21.5%), PI538082 (20.9%) and PI538097 (20.9%). Values for the three accessions of A. manihot with the highest seed oil content were PI nos. PI639673 (20.4%), PI639674 (20.9%) and PI639675 (21.9%), all representing var. tetraphyllus. Average percent seed oil in materials of A. esculentus from Turkey and Sudan (17.35% and 17.36%, respectively) exceeded the averages of materials from other locations. Ninety-eight accessions (total of six species) were also examined for fatty acid composition. Values of linoleic acid ranged from 23.6-50.65% in A. esculentus. However, mean linoleic acid concentrations were highest in A. tuberculatus and A. ficulneus. Concentrations of palmitic acid were significantly higher in A. esculentus (range of 10.3-36.35%) when compared to that of other species, and reached a maximum in PI489800 Concentrations of palmitic acid were also high in A. caillei (mean = ∼30%). Levels of oleic acid were highest in A. manihot, A. manihot var. tetraphyllus and A. moschatus.
authors.affiliation: Plant Genetic Resources Conservation Unit, USDA/ARS, Griffin, Georgia 30223, United States. bob.jarret@ars.usda.gov
authors.forename: Robert L
authors.initials: RL
authors.lastname: Jarret
authors.forename: Ming Li
authors.initials: ML
authors.lastname: Wang
authors.forename: Irvin J
authors.initials: IJ
authors.lastname: Levy
mesh_terms: D028483:Abelmoschus / Q000737:chemistry*; D005227:Fatty Acids / Q000032:analysis* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D010938:Plant Oils / Q000032:analysis*; D012639:Seeds / Q000737:chemistry*
chemical_list: D005227:Fatty Acids; D010938:Plant Oils