%0 Journal Article 
%A Ortiz, María Ángeles
%A Talavera, Salvador
%A Garcia Castaño, Juan Luis
%A Tremetsberger, Karin
%A Stuessy, T.F.
%A Balao, Francisco
%A Casimiro-Soriguer Camacho, Ramón
%T Self‐incompatibility and floral parameters in Hypochaeris sect. Hypochaeris (Asteraceae)
%D 2006
%@ 0002-9122
%U http://hdl.handle.net/10498/30324
%X We studied the relationships between self-incompatibility mechanisms and floral parameters in the genusHypochaerisL. sect.Hypochaeris(consisting ofH. glabra,H. radicata,H. arachnoidea, andH. salzmanniana). We assessed at intra- and interspecificlevels (1) the self-incompatibility  (SI)  mechanism and its distribution among populations, (2) the relationship between SI andfloral  parameters,  and  (3)  the  relationship  of  SI  to  reproductive  success.Hypochaeris  salzmannianais  semi-incompatible,H.glabrais  self-compatible,  andH.  arachnoideaandH.  radicataare  self-incompatible.  Floral  parameters  differed  amongpopulations ofH. salzmanniana: plants in self-compatible populations had fewer flowers per head, a smaller head diameter on theflower, and a shorter period of anthesis than self-incompatible populations. We also detected this pattern within a semi-compatiblepopulation ofH. salzmanniana, and these differences were also found between species with different breeding mechanisms. Fruitto flower ratio in natural populations was generally high (.60%) in all species, regardless of breeding system. It is hypothesizedthat self-compatibility may have arisen through loss of allelic diversity at theSlocus due to bottleneck events and genetic drift
%~ Universidad de Cádiz