Gene flow between cultivated sunflower and Helianthus petiolaris (Asteraceae)

Gutierrez, Agustina
Carrera, Alicia Delia
Basualdo, Jessica
Rodríguez, R.
Cantamutto, Miguel Ángel
Poverene, María Mónica

Open link

Publication date

October 2009

DOI

10.1007/s10681-009-0045-y

Publisher

Springer Science and Business Media LLC

Journal

Euphytica

Abstract

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...