SELF-INCOMPATIBILITY IN SOUTH AMERICAN HYPOCHAERIS SPECIES (LACTUCEAE, ASTERACEAE)

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

Barcelona. Espana

Simposio; The International Compositae Alliance; 2006

TICA

Keywords: Asteraceae; Hypochaeris; self-incompatibility; South America   The genus Hypochaeris L. contains c. 60 species with two diversification centers: the first one in the Old World with c. 15 species, most of them Mediterranean-Macaronesian, and the second one with c. 45 species, in South America, mainly in the Andean Range. Most of the Mediterranean species in this genus are self-incompatible (Ortiz et al., 2006) but there is little information on the incompatibility system of the American species. In this study we analyze the incompatibility system of several South American species: H. petiolaris, H. pinnatifida, H. pampasica, H. variegata, H. megapotamica, H. albiflora, H. chillensis, H. brasiliensis, H. microcephala and H. parodii. This study was carried out in glasshouse, on individuals emerging from seeds collected from the field. Our results show a surprisingly high percentage of self-compatible species in the American continent.