Artículo
Gene flow between cultivated sunflower and Helianthus petiolaris (Asteraceae)
Gutierrez, Agustina
; Carrera, Alicia Delia; Basualdo, Jessica
; Rodríguez, R.; Cantamutto, Miguel Ángel; Poverene, María Mónica
Fecha de publicación:
10/2009
Editorial:
Springer
Revista:
Euphytica
ISSN:
0014-2336
e-ISSN:
1573-5060
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Resumen
Helianthus petiolaris (Asteraceae) native to North America has naturalized in Argentina. The extensive overlapping with sunflower crop regions, the coincidence of life cycles and the common pollinators facilitate interspecific crosses with sun- flower, H. annuus var. macrocarpus. To estimate the occurrence of crop-to-wild and wild-to-crop gene flow, off-type plants in progenies of pure stands of both species flowering in coincidence and the presence of crop alleles in H. petiolaris populations were investigated in 26 wild populations and nine crop fields. Morphological traits and RAPD markers were used to attempt hybrid characterization. Off-type individuals were found in frequencies of 0.5 and 0.3% among crop progenies and wild populations, respectively. Off-type plants showed intermediate values for metric morphological traits and low fertility traits. Some off-type plants proved to carry crop alleles based on molecular analysis. The average frequency of cultivar-marker introgression across the wild populations was very low (0.02). Although observed hybridization rates seem to be low, the extension of crop-wild overlapping in Argentina make hybrid formation a noticeable process. Therefore, the new sunflower varieties and eventually GM varieties would transfer their traits through pollen flow and they would persist in H. petiolaris populations.
Palabras clave:
Crop-Wild Hybridization
,
Introgression
,
Morphological Traits
,
Radp Markers
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(CERZOS)
Articulos de CENTRO REC.NAT.RENOVABLES DE ZONA SEMIARIDA(I)
Articulos de CENTRO REC.NAT.RENOVABLES DE ZONA SEMIARIDA(I)
Citación
Gutierrez, Agustina; Carrera, Alicia Delia; Basualdo, Jessica; Rodríguez, R.; Cantamutto, Miguel Ángel; et al.; Gene flow between cultivated sunflower and Helianthus petiolaris (Asteraceae); Springer; Euphytica; 172; 1; 10-2009; 67-76
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