Plant traits correlated with generation time directly affect inbreeding depression and mating system and indirectly genetic structure

摘要: Understanding the mechanisms that control species genetic structure has always been a major objective in evolutionary studies. The association between and attributes received special attention. As are highly taxonomically constrained, phylogenetically controlled methods necessary to infer causal relationships. In plants, previous study controlling for phylogenetic signal demonstrated Wright's FST, measure of differentiation among populations, is best predicted by mating system (outcrossing, mixed-mating or selfing) plant traits such as perenniality growth form have only an indirect influence on FST via their with system. this further outline determinants distinguishing effects gene flow drift. biparental inbreeding depression population structure, also investigated. Based data from 263 which estimates (FIS) outcrossing rate (tm) available, we confirm main influencing factor FST. Moreover, using alternative unaffected impact effective size, show tm due its (reduced pollen under drift (higher selfing inbreeding). Plant traits, particular perenniality, mostly effect but magnitude selection against inbred individuals: mean increases short-lived herbaceous long-lived then woody species. does not seem be related differences stature, proposed earlier, rather generation time. correlated time affect both These turn modify ultimately structure.