info:ar-repo/semantics/artículo
Effect of genetic background on the stability of sunflower fatty acid composition in different high oleic mutations
Fecha
2018Autor
Alberio, Constanza
Aguirrezábal, Luis Adolfo Nazareno
Izquierdo, Natalia Gabriela
Reid, Roberto
Zuil, Sebastian
Zambelli, Andres Daniel
Resumen
BACKGROUND: The effect of genetic background on the stability of fatty acid composition in sunflower near isogenic lines (NILs) carrying high-oleic Pervenets (P) or high-oleicNM1mutationswas studied. Thematerialswere field-tested in different locations
and at different sowing dates to evaluate a wide range of environmental conditions. Relationships were established between
the fatty acids and theminimum night temperature (MNT) and the response was characterized.
RESULTS: A genetic background effect for the fatty acid compositionwas found in both groups of NILs. The NM1-NILs showed an
oleic level higher than 910 g kg−1 and theyweremore stable across environmentswith a zero or lowdependence on the genetic
background; on the other hand, high oleic materials bearing the P mutation showed lower levels of oleic acid, with a higher
variation in fatty acid composition and a highly significant dependence on the genetic background.
CONCLUSION: The NM1 mutation is the best option to develop ultra-high oleic sunflower oil that is stable across environments
and genetic backgrounds,making its agronomical production more efficient and predictable.