Population genomic analysis based on geographically large-scale samples provides insights into the evolutionary history of the wood oil plant Lindera glauca in East Asia

作者：Biao Xiong, Lun Xie, Chaoqian Ren, Yingxiong Qiu, Quentin Cronk, Shanshan Zhu · 发表于：Industrial Crops and Products · 年份：2025 · DOI：10.1016/j.indcrop.2025.120556 · 被引用次数：3 · 研究领域：Plant biochemistry and biosynthesis、Oil Palm Production and Sustainability、Genetic diversity and population structure

Lindera glauca is a dioecious tree widely distributed in East Asia, possessing significant economic and ecological value. Despite its importance, large-scale population genomic studies on this species have been lacking. This study aims to address this gap by conducting an in-depth analysis of population genetic structure, genetic diversity, demographic history and adaptive evolution using genome-wide single nucleotide polymorphism (SNP) markers. Utilizing RAD-seq to genotype 116 individuals from 15 populations spanning the mainland and Taiwan China, Japan, and Korea, four genetic groups were identified: two in mainland China, one in Taiwan, and one in Japan-Korea. The Taiwan group showed the highest genetic differentiation with other groups, indicating prolonged isolation, while Japanese and Korean groups exhibited minimal differentiation, suggesting a shared history or gene flow. Two groups in mainland China shows some degree of admixture, reflecting the complex evolutionary history. A rooted phylogenetic analysis and demographic inference both traced the origin of L. glauca to the mainland China, followed by dispersal and differentiation into Japan-Korea and Taiwan at around 14,000 and 4700 years ago. All the groups showed a gradually decrease in N e except a historical bottleneck in mainland Chinese populations likely caused by climate changes. Selective sweep analysis highlighted population-specific adaptations, particularly in photosynthesis and energy metabolism genes, ...