Landscape genomics reveals genetic signals of environmental adaptation of African wild eggplant

Crop wild relatives possess desirable traits that confer resilience to various environmental stresses. We applied landscape genomics, that associates environment with genomic variation to understand the genetic basis of their adaptation. 
 
In this study, we applied landscape genomics to examine the differences in allele frequency of 15,416 Single Nucleotide Polymorphisms (SNPs) among 153 accessions of wild eggplant relatives from Africa, the principal hotspot of these wild relatives. Further, we explored the correlation between the genetic variations and the bio-climatic and soil conditions at their collection sites.
 
Our results showed that the environment has a greater impact on the genetic variation in the eggplant wild relative populations compared to the geographical distances between collection sites while controlling for population structure. These findings indicate the relevance of the environment in shaping genetic variation in eggplant relatives over time. We detected also c...

作物野生近缘种具备可赋予其抵御多种环境胁迫能力的优良性状。本研究采用将环境与基因组变异相关联的景观基因组学（landscape genomics）方法，以解析其适应性的遗传基础。

本研究借助景观基因组学手段，对源自非洲（该类野生茄近缘种的主要分布热点）的153份野生茄近缘种质材料的15416个单核苷酸多态性（Single Nucleotide Polymorphisms, SNPs）的等位基因频率差异展开分析。此外，本研究还探究了其遗传变异与采样点处生物气候及土壤条件之间的相关性。

研究结果显示，在控制种群结构的前提下，相较于采样点间的地理距离，环境对野生茄近缘种群的遗传变异具有更为显著的影响。上述研究结果表明，环境在长期塑造茄近缘物种遗传变异的过程中发挥着关键作用。本研究还检测到……