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<p>Understanding the genomic basis of ecological adaptation is essential to deciphering how dominant species survive under extreme abiotic stresses. <i>Oresitrophe rupifraga</i> (Saxifragaceae) is a perennial herb restricted to limestone cliffs in China, possessing high ornamental and medicinal value. Its wide distribution and large population sizes make it a natural model for identifying genetic mechanisms of resilience, which may inform crop improvement for extreme environments. Here, we present a chromosome-level genome assembly of <i>O. rupifraga</i>, which spans 717.76 Mb and has 96.21% of its sequences anchored to 17 chromosomes. The assembly has a scaffold N50 of 42.40 Mb, a BUSCO completeness of 98%, and Merqury QV values above 50 for all chromosomes. A total of 37,005 protein-coding genes were predicted, with 99.10% BUSCO completeness and 97.3% OMArk completeness. Repetitive sequences comprise 63.35% of the genome, with long terminal repeats accounting for 44.19%. This genomic resource will facilitate studies of the ecological adaptation and evolutionary history of cliff-dwelling plants.</p>

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Chromosome-level genome assembly of the cliff-dwelling plant Oresitrophe rupifraga (Saxifragaceae)

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月31日

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  • Wei-Long Gao,
  • Liao-Cheng Zhao,
  • Meng-Yao Xu,
  • Feng-Fan Yang,
  • Xian-Yun Mu

摘要

Understanding the genomic basis of ecological adaptation is essential to deciphering how dominant species survive under extreme abiotic stresses. Oresitrophe rupifraga (Saxifragaceae) is a perennial herb restricted to limestone cliffs in China, possessing high ornamental and medicinal value. Its wide distribution and large population sizes make it a natural model for identifying genetic mechanisms of resilience, which may inform crop improvement for extreme environments. Here, we present a chromosome-level genome assembly of O. rupifraga, which spans 717.76 Mb and has 96.21% of its sequences anchored to 17 chromosomes. The assembly has a scaffold N50 of 42.40 Mb, a BUSCO completeness of 98%, and Merqury QV values above 50 for all chromosomes. A total of 37,005 protein-coding genes were predicted, with 99.10% BUSCO completeness and 97.3% OMArk completeness. Repetitive sequences comprise 63.35% of the genome, with long terminal repeats accounting for 44.19%. This genomic resource will facilitate studies of the ecological adaptation and evolutionary history of cliff-dwelling plants.