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Genetic analysis of the high oleic acid content in cultivated sunflower (Helianthus annuus L.)

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Summary

Sunflower lines breeding true for very high oleic acid content in their oil (average levels higher than 85%) were crossed with standard sunflower lines with mean oleic acid levels of 30%. Analysis of the oil of F1 seeds indicated dominance for high oleic levels and control of the genotype of the embryo. Segregating generations were obtained selfing heterozygous high oleic BCnF1 plants from several generations of a backcrossing program to incorporate the high oleic character to standard inbred lines and testcrossing these plants to low oleic material. Analysis of F2 and testcrossed seeds showed three kind of segregations, in both F2 and testcrossed populations, with different proportions of low, intermediate and high oleic types. Genetic analysis of these data supported the hypothesis, that the high oleic character is controlled by three dominant complementary genes OL1, OL2 and OL3. Additional data showing F1 seeds with intermediate oleic content and segregations for high oleic in progenies of intermediate types, suggest the presence of major factors modifying high oleic acid content.

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Authors and Affiliations

  1. Department of Breeding and Agronomy, CIDA, Apartado 240, Córdoba, Spain

    J. Fernández-Martínez, A. Jimenez & J. Dominguez

  2. Instituto de la Grasa y sus derivados, Avda. Padre Garciá Tejero 4, Sevilla, Spain

    J. M. Garcia, R. Garces & M. Mancha

Authors
  1. J. Fernández-Martínez
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  2. A. Jimenez
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  3. J. Dominguez
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  4. J. M. Garcia
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  5. R. Garces
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  6. M. Mancha
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Fernández-Martínez, J., Jimenez, A., Dominguez, J. et al. Genetic analysis of the high oleic acid content in cultivated sunflower (Helianthus annuus L.). Euphytica 41, 39–51 (1989). https://doi.org/10.1007/BF00022409

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  • DOI: https://doi.org/10.1007/BF00022409

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