Article

The relevance of spatiall y explicit studies of genetie diversity in threatened taxa along with the importance of understanding that biologica I proccesses and environmental factors that determine the genetic structure is examplified in the study case of Antirrhinum microphyllum Rothm. (Scrophulariaceae) an endangered narrow endemie ofCentral Spain. The approaeh al a regional scale including ali known populations was based in allozyme analysis of 184 individuals (46 individuals per population) and showed little differentiation among populations. [n a second step Bolarque population was approaehed through RAPO analysis. The study showed that the population was genetically structured in neighborhoods. Pollen transport may be responsible far the maintenance of geneti c vicinities whereas sporadic long-distance seed dispersal is IikeIy to explain the relatedness among certain patches. Ali these features carry aut important implications far conservation.