Main content area

A new sunflower mutant with increased levels of palmitic acid in seed oil / un nuevo mutante de girasol con alto contenido en ácido palmítico en el aceite / un nouveau mutant de tournesol avec un taux d’acide palmitique augmente dans l’huile de la graine

Velasco, L., Pérez-Vich, B., Fernández-Martínez, J.M.
Helia 2014 v.31 no.48 pp. 55-60
Helianthus annuus, alleles, ethyl methanesulfonate, loci, mutagenesis, mutants, palmitic acid, seeds, sunflower oil
Sunflower oil with increased levels of saturated fatty acids has important applications in food industry. The objective of this research was to develop novel variations with increased saturated fatty acid levels by chemical mutagenesis. Seeds of four different accessions of Peredovik were treated with a solution of ethylmethane sulfonate. M2 seeds from a single M1 plant exhibited a large variation (5-29%) for palmitic acid content. The progenies of all selected M2 seeds showed again continuous ranges of variation (10-30%) for palmitic acid content. Similar continuous segregation was observed in some M3:4 and M4:5 families derived from high palmitic half seeds (>25%), although other families had uniformly high palmitic acid content. Previous genetic studies of CAS-5, a high palmitic acid mutant which showed clear bimodal distributions in the M2 generation, concluded that the trait was genetically controlled by alleles at three loci. The different segregation patterns observed in NP-40, the new high palmitic acid mutant, suggested that it was genetically different from CAS-5.