Linking genetic diversity, mating patterns and progeny performance in fragmented populations of a Mediterranean shrub

摘要: Summary 1. The long-term persistence of fragmented plant populations is predicted to be threatened by a loss genetic variability and increasing inbreeding, which might lower offspring fitness through inbreeding depression. Assessing progeny performance together with measurements diversity mating patterns therefore essential in the understanding role historical (i.e. adults) contemporary current patterns) effects fragmentation on depression, thus, recruitment potential. 2. We evaluated diversity, at different life stages seven Mediterranean shrub (myrtle Myrtus communis) that differed size degree isolation (Large, Small-connected Small-isolated populations). The study was conducted Guadalquivir Valley (SW Spain), chronically severely landscape characterized c. 1% woodland cover. 3. Parameters (Ar, Ho He) adult plants were general higher Large than two types Small populations, similar. Outcrossing rates (mean: tm = 0·62), intermediate (tm = 0·35) (tm = 0·13), positively correlated progenies. 4. Several particular those related quantity viable seedlings produced (germination survival). rather these performance. 5. We thus conclude (outcrossing rates) have more critical influence either population or levels diversity. 6. Synthesis applications. It may possible enhance certain progenies promoting outcrossed matings self-compatible species. In our species, this would feasible controlling honeybee Apis mellifera hives maintaining and/or enhancing connectivity around small patches.