Genetic Structure Is Associated with Phenotypic Divergence in Floral Traits and Reproductive Investment in a High-Altitude Orchid from the Iron Quadrangle, Southeastern Brazil

摘要: Knowledge of the role Neotropical montane landscapes in shaping genetic connectivity and local adaptation is essential for understanding evolutionary processes that have shaped extraordinary species diversity these regions. In present study, we examined landscape genetics, estimated diversity, explored relationships with morphological variability reproductive strategies seven natural populations Cattleya liliputana (Orchidaceae). Nuclear microsatellite markers were used analyses. Spatial Bayesian clustering population-based analyses revealed significant structuring high (He = 0.733 ± 0.03). Strong differentiation was found between over short spatial scales (FST 0.138, p < 0.001), reflecting discontinuity isolation. Monmonier´s maximum difference algorithm, analysis on STRUCTURE principal component identified one major populations. Divergent groups showed phenotypic divergence flower traits strategies. Increased sexual effort associated rock outcrop type may be a response to adverse conditions growth vegetative reproduction. Here discuss effect restricted gene flow, plasticity as drivers population outcrops.