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Instituto de la Grasa (CSIC), Apartado 1078, E-41080, Sevilla, Spain
Instituto de Agricultura Sostenible (CSIC), Apartado 4084, E-14080 Córdoba, Spain
* Corresponding author.
Development of cultivars of sunflower (Helianthus annuus L.) with increased levels of saturated fatty acids could increase the utility of the oil for specific edible purposes. The primary objective of this research was to induce variability for these traits by using mutagenesis. Four sunflower mutants with altered seed fatty acid compositions have been isolated by screening single M2 and M3 seeds from plants obtained from mutagenized seeds utilizing ethyl methanesulfonate, sodium azide, and x-rays. The mutant lines included CAS-5, which has an oil with a fivefold increase (252 g kg–1) in palmitic acid (16:0) and the appearance of palmitoleic acid (16:1; 37 g kg–1); and CAS-3, CAS-4, and CAS-8, which have from two to six times (99–260 g kg–1) the stearic acid (18:0) content normally observed in the oil of cultivated sunflower. The dramatic increase in levels of either 16:0 or 18:0 were at the expense of oleic (18:1) and linoleic (18:2) acids. The relative proportion of 18:1 to 18:2 varied with the mutants. All showed variation in fatty acid composition among the seeds of the original plant, which indicated that the fatty acid changes were controlled by the genotype of the embryo. The bimodal distribution in fatty acid composition of CAS-3 and CAS-5 seeds suggested that major recessive genes are involved in the control of these characters.
Received for publication April 11, 1994.
This article has been cited by other articles:
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  B. Perez-Vich, L. Velasco, J. Munoz-Ruz, and J. M. Fernandez-Martinez Inheritance of High Stearic Acid Content in the Sunflower Mutant CAS-14 Crop Sci., December 2, 2005; 46(1): 22 - 29. [Abstract] [Full Text] [PDF]
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B. Perez-Vich, J. Munoz-Ruz, and J. M. Fernandez-Martinez Developing Midstearic Acid Sunflower Lines from a High Stearic Acid Mutant Crop Sci., January 1, 2004; 44(1): 70 - 75. [Abstract] [Full Text] [PDF]
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L. Velasco, B. Perez-Vich, and J. M. Fernandez-Martinez Use of Near-Infrared Reflectance Spectroscopy for Selecting for High Stearic Acid Concentration in Single Husked Achenes of Sunflower Crop Sci., January 1, 2004; 44(1): 93 - 97. [Abstract] [Full Text] [PDF]
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B. Perez-Vich, R. Garces, and J. M. Fernandez-Martinez Inheritance of Medium Stearic Acid Content in the Seed Oil of a Sunflower Mutant CAS-4 Crop Sci., November 1, 2002; 42(6): 1806 - 1811. [Abstract] [Full Text] [PDF]
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 Q. Liu, S. P. Singh, and A. G. Green High-Stearic and High-Oleic Cottonseed Oils Produced by Hairpin RNA-Mediated Post-Transcriptional Gene Silencing Plant Physiology, August 1, 2002; 129(4): 1732 - 1743. [Abstract] [Full Text] [PDF]
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B. Pérez-Vich, R. Garcés, and J. M. Fernández-Martínez Genetic Relationships between Loci Controlling the High Stearic and the High Oleic Acid Traits in Sunflower Crop Sci., July 1, 2000; 40(4): 990 - 995. [Abstract] [Full Text]
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