RAD-seq data from: Evidence of local adaptation despite strong drift in a Neotropical patchily distributed bromeliad

Both genetic drift and divergent selection are predicted to be drivers of population differentiation across patchy habitats, but the extent to which these forces act on natural populations to shape traits is strongly affected by species' ecological features. In this study, we infer the genomic structure of Pitcairnia lanuginosa, a widespread herbaceous perennial plant with a patchy distribution. We sampled populations in the Brazilian Cerrado and the Central Andean Yungas and discovered and genotyped SNP markers using double-digest restriction-site associated DNA sequencing. In addition, we analyzed ecophysiological traits obtained from a common garden experiment and compared patterns of phenotypic and genetic divergence (PST-FST comparisons) in a subset of populations from the Cerrado. Our results from molecular analyses pointed to extremely low genetic diversity and a remarkable population differentiation, supporting a major role of genetic drift. Approximately 0.3% of genotyped SNPs ...

遗传漂变与趋异选择均被预测为异质生境中种群分化的核心驱动因子，然而这两种演化力量作用于自然种群以塑造性状的程度，会受到物种生态特征的强烈调控。本研究针对分布呈斑块状的广布多年生草本植物*Pitcairnia lanuginosa*展开，解析其基因组结构。我们在巴西塞拉多（Brazilian Cerrado）与安第斯中部云林（Central Andean Yungas）开展种群采样，并利用双酶切限制性位点关联DNA测序（double-digest restriction-site associated DNA sequencing）技术开发并完成了单核苷酸多态性（Single Nucleotide Polymorphism, SNP）标记的基因分型。此外，我们对同质园实验获取的生态生理性状进行了分析，并针对塞拉多地区的部分种群开展了表型分化与遗传分化的模式比较（PST-FST对比分析）。分子分析结果显示，该物种的遗传多样性极低，种群分化程度极高，这印证了遗传漂变所发挥的主导作用。在完成基因分型的SNP标记中，约有0.3%的位点……