Signatures of Environmental Adaptation During Range Expansion of Wild Common Bean (Phaseolus vulgaris)

Landscape genomics integrates population genetics with landscape ecology, allowing the identification of putative molecular determinants involved in environmental adaptation across the natural geographic and ecological range of populations. Wild Phaseolus vulgaris, the progenitor of common bean (P. vulgaris), has a remarkably extended distribution over 10,000 km from northern Mexico to northwestern Argentina. Earlier research has shown that this distribution represents a range expansion from Mesoamerica to the southern Andes through several discrete migration events and that the species colonized areas with different temperature and rainfall compared to its core area of origin. Thus, this species provides an opportunity to examine to what extent adaptation of a species can be broadened or, conversely, ecological or geographical distribution can be limited by inherent adaptedness. In the current study, we applied a landscape genomics approach to a collection of 246 wild common bean acces...景观基因组学（Landscape genomics）将群体遗传学与景观生态学相结合，可用于鉴定跨种群自然地理与生态分布范围内、参与环境适应过程的推定分子决定因子。野生菜豆（Wild Phaseolus vulgaris）是普通菜豆（Phaseolus vulgaris）的祖先种，其分布范围极广，从墨西哥北部延伸至阿根廷西北部，跨度超10000公里。既往研究表明，该物种的分布对应了从中美洲到安第斯南部的范围扩张过程，期间经历了数次离散的迁移事件；且该物种定植的生境，其温度与降水条件均与其起源核心区域存在显著差异。因此，该物种为研究「物种适应能力可被拓展至何种程度，抑或反过来，物种的生态或地理分布是否会受固有适应性的限制」提供了绝佳研究契机。在本研究中，我们针对246份野生普通菜豆种质（acces...）集合应用了景观基因组学研究方法……