Genetic variability of the narrow endemic Rhamnus persicifolia Moris (Rhamnaceae) and its implications for conservation

► Rhamnus persicifolia an endemic tree growing in Sardinia (Italy) was studied. ► ISSR detected the genetic diversity within and among populations of the species. ► Quite high levels of genetic diversity were detected at both levels. ► A spatial genetic structure was detected with BAPS analysis. ► Measures are suggested for integrated in situ and ex situ conservation programs.