info:eu-repo/semantics/article
Gene flow between cultivated and wild sunflower Helianthus annuus in Argentina
Registro en:
Ureta, Maria Soledad; Carrera, A. D.; Cantamutto, M. A.; Poverene, Maria Monica; Gene flow between cultivated and wild sunflower Helianthus annuus in Argentina; Elsevier Science; Agriculture, Ecosystems and Environment; 123; 4; 2-2008; 343-349
0167-8809
CONICET Digital
CONICET
Autor
Ureta, Maria Soledad
Carrera, A. D.
Cantamutto, M. A.
Poverene, Maria Monica
Resumen
Naturalized populations of wild sunflower, Helianthus annnus, occur in six provinces of central Argentina, usually near sunflower crops. Plants of intermediate morphology indicate that gene flow might take place in both senses. In order to quantify gene flow between cultivated and wild sunflower, an experimental stand of sunflower was sown surrounded by plots of wild plants at increasing distances. Hybridization rate was estimated using a crop specific isozyme marker, and a mean of 7% progenies were crop-wild hybrids. The nearest wild plants (3 m from the cultivar) showed the highest percentage (18%) of gene flow, which was found to decrease with distance, up to 500 m. Pollen flow from wild plants to crop, evaluated through morphological characters in the progenies of cultivated plants from a stand invaded by wild sunflowers, produced 3.75% intermediate plants. Fil: Ureta, Maria Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiarida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiarida; Argentina Fil: Carrera, A. D.. Universidad Nacional del Sur. Departamento de Agronomía; Argentina Fil: Cantamutto, M. A.. Universidad Nacional del Sur. Departamento de Agronomía; Argentina Fil: Poverene, Maria Monica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiarida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiarida; Argentina