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<p><i>Cerasus campanulata</i> (Maxim.) Yu et Li is an important ornamental plant valued for its aesthetic appeal and ecological contributions. This study explores the genetic diversity and population structure of 32 <i>C. campanulata</i> samples from Fujian and Taiwan, two regions separated by the Taiwan Strait, using Restriction-site Associated DNA sequencing (RAD-Seq). Our objectives were to assess genetic variation, evaluate genetic distance and gene flow between the two populations, and provide a theoretical foundation for breeding and conservation efforts. We identified 193,662 variants, revealing clear genetic differentiation between the Fujian and Taiwan populations. Genetic structure analysis, phylogenetic tree construction, and PCA clustering classified the samples into three subgroups: G1 (five Fujian samples), G2 (eight Taiwan and five Fujian samples), and G3 (a mixed group of 14 individuals from G1 and G2). Linkage disequilibrium (LD) decay analysis indicated strong selection pressure in the Fujian population. Additionally, selective genes such as <i>CLB</i>, <i>PSD1</i>, <i>BRI1</i>, <i>KEG</i>, and <i>ISS1</i>, associated with abiotic stress responses, were identified. Our findings suggest varying levels of genetic divergence and local adaptation between the mainland Fujian and island Taiwan populations, likely driven by geographic isolation. This study provides valuable insights into the evolutionary processes shaping <i>C. campanulata</i> populations and offers a scientific basis for conservation and breeding programs.</p>

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Patterns of Genomic Divergence Across Geographically Variable Populations of Cerasus campanulata (Maxim.) Yu et Li (Rosaceae)

  • 期刊论文

  • 发表日期：

    2026年2月10日

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  • Xiuming Xu,
  • Hongyao Hu,
  • Enwen Lin,
  • Lumei Liu,
  • Yuchong Yi,
  • Yingjia Shen,
  • Xiaokai Ma,
  • Shipin Chen

摘要

Cerasus campanulata (Maxim.) Yu et Li is an important ornamental plant valued for its aesthetic appeal and ecological contributions. This study explores the genetic diversity and population structure of 32 C. campanulata samples from Fujian and Taiwan, two regions separated by the Taiwan Strait, using Restriction-site Associated DNA sequencing (RAD-Seq). Our objectives were to assess genetic variation, evaluate genetic distance and gene flow between the two populations, and provide a theoretical foundation for breeding and conservation efforts. We identified 193,662 variants, revealing clear genetic differentiation between the Fujian and Taiwan populations. Genetic structure analysis, phylogenetic tree construction, and PCA clustering classified the samples into three subgroups: G1 (five Fujian samples), G2 (eight Taiwan and five Fujian samples), and G3 (a mixed group of 14 individuals from G1 and G2). Linkage disequilibrium (LD) decay analysis indicated strong selection pressure in the Fujian population. Additionally, selective genes such as CLB, PSD1, BRI1, KEG, and ISS1, associated with abiotic stress responses, were identified. Our findings suggest varying levels of genetic divergence and local adaptation between the mainland Fujian and island Taiwan populations, likely driven by geographic isolation. This study provides valuable insights into the evolutionary processes shaping C. campanulata populations and offers a scientific basis for conservation and breeding programs.