MATING SYSTEM OF HYPOCHAERIS SPECIES (LACTUCEAE, ASTERACEAE) IN ARGENTINA

M. A. ORTIZ; M. TALAVERA; J. L. GARCIA-CASTANO; T. F. STUESSY; E. URTUBEY; K. TREMETSBERGER; C. M. BAEZA; A. TERRAB; S. TALAVERA

Barcelona. Espana

Simposio; The International Compositae Alliance; 2006

TICA

  Keywords: Asteraceae; Hypochaeris; mating system; reproductive success; self-incompatibility; South America   The genus Hypochaeris includes c. 50 species in South America. All these species are perennial, with an intensive vegetative multiplication. Some of them are self-incompatible, and if there are not many inter-compatible genotypes a low fruit production may be found. The present study focuses on the self-incompatibility system and reproductive success in the wild of twelve Argentinean populations of four Hypochaeris species: H. rosengurttii, H. variegata, H. caespitosa and H. argentina. Field work was developed during the austral spring-summer of 2005-2006. Most frequent pollinators of these species were solitary bees and flies. Some self-incompatible populations showed a low reproductive success, which was not related to a lack of pollinators.