The present study evaluated genetic diversity of Lithuanian populations of Lythrum salicaria in relation to parameters of riparian environment. Growing along Nemunas, Seaside and Lielupė river basins, 15 populations were examined using amplified fragment length polymorphism markers. Molecular data were related to the river basins, type of land use and cover, natural vice versa regulated fragments of the rivers. Population mean genetic diversity parameters were as follows: percentage of polymorphic loci (57.2), expected heterozygosity (0.183), polymorphismc information content (0.218). Mantel test revealed correlation (R2 = 0.0986, p = 0.01) between genetic and geographic distance of populations. Greater genetic diversity within, rather than among populations (ΦPT = 0.213) was observed. According to the Bayesian clustering, studied populations are admixtures of two gene pools. Analysis of molecular variance revealed significant differentiation between populations belonging to distinct river basins, between populations from natural vs. regulated fragments of the rivers.

中文翻译：

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立陶宛紫色珍珠鸡（LYTHRUM SALICARIA）种群的遗传和环境特征之间的关系

本研究评估了立陶宛千屈菜种群的遗传多样性与河岸环境参数的关系。沿着 Nemunas、Seaside 和 Lielupė 河流域生长，使用扩增的片段长度多态性标记检查了 15 个种群。分子数据与河流流域、土地利用类型和覆盖率有关，反之亦然受管制的河流碎片。种群平均遗传多样性参数如下：多态位点百分比（57.2），预期杂合度（0.183），多态性信息含量（0.218）。Mantel 检验揭示了种群的遗传距离和地理距离之间的相关性（R2 = 0.0986，p = 0.01）。观察到种群内部而非种群之间的更大遗传多样性（ΦPT = 0.213）。根据贝叶斯聚类，研究的种群是两个基因库的混合物。分子方差分析揭示了属于不同河流流域的种群之间、来自河流的自然片段与受管制片段的种群之间的显着差异。