Gene Flow between Potato Cultivars under Experimental Field Conditions in Argentina |
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Authors: | M A Capurro E L Camadro R W Masuelli |
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Institution: | 1. Estación Experimental Agropecuaria (EEA) Balcarce, Instituto Nacional de Tecnología Agropecuaria (INTA)-Facultad de Cs. Agrarias (FCA)-Universidad Nacional de Mar del Plata, Ruta Nacional 226, km 72.5, 7620, Balcarce, Buenos Aires, Argentina 2. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina 3. EEA La Consulta, INTA-FCA, Universidad Nacional de Cuyo, Ex Ruta Nacional 40, km 96, Luján de Cuyo, Mendoza, Argentina
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Abstract: | Wild and cultivated potatoes form a polyploid series with 2n = 2x to 2n = 6x (x =?12). In nature, they are separated by external and/or internal hybridization barriers that, when incomplete, provide opportunities for gene flow and introgression. Isolation distances estimated in one environment are not necessary extrapolable. As a starting point for pollen-mediated gene flow risk assessment in potatoes, an experiment was set up in the field in one of the major potato growing area in Argentina, with two pollen-pistil compatible tetraploid commercial cultivars with differential molecular marker patterns. The field design consisted of a 10?×?10 m central square with the pollen donor, surrounded by circles with a male sterile pollen recipient, set every 10 m up to 40 m. The crop was managed as a perennial, and data were recorded over 2 years. Seeded berries were obtained in both years at 30 and 40 m away from the center; all of them contained hybrid seeds as revealed by electrophoretic profiles. We consider that a minimal required isolation distance of 100 m or more would be more suitable for preventing undesirable gene flow in the area. |
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