Population history provides foundational knowledge for utilizing and developing native plant restoration materials

A species’ population structure and history are critical pieces of information that can help guide the use of available native plant materials in restoration treatments and decide what new native plant materials should be developed to meet future restoration needs. In the western United States, Pseudoroegneria spicata (bluebunch wheatgrass; Poaceae) is an important component of grassland and shrubland plant communities and commonly used for restoration due to its drought resistance and competitiveness with exotic weeds. We used next-generation sequencing data to investigate the processes that shaped P. spicata’s geographic pattern of genetic variation across the Intermountain West. Pseudoroegneria spicata’s genetic diversity is partitioned into populations that likely differentiated since the Last Glacial Maximum. Adjacent populations display varying magnitudes of historical gene flow, with migration rates ranging from multiple migrants per generation to multiple generations per migrant...物种种群结构与演化历史是关键基础信息，可为生态修复治理中现有本土植物材料的合理应用提供指导，并为确定需研发的新型本土植物材料以满足未来修复需求提供依据。 在美国西部，蓝丛小麦草（Pseudoroegneria spicata，英文名bluebunch wheatgrass；禾本科（Poaceae））是草原与灌丛植物群落的重要组成部分，因其耐旱性与对外来杂草的竞争能力，常被用于生态修复工程。 本研究采用下一代测序数据，解析了该物种在美国西部山间区域的遗传变异地理格局的形成过程。 蓝丛小麦草的遗传多样性可划分为多个种群，这些种群大概率自末次盛冰期以来发生了分化。 相邻种群间的历史基因流强度存在差异，迁移速率范围从每代多个迁移个体，延伸至每个迁移个体对应多代的区间……