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<p><i>Salix brachista</i>, commonly known as Cushion willow, is a common component of subnival alpine assemblages and a dioecious or monoecious plant with a creeping stem and numerous lateral branches. Cushion willow takes cuttings more easier and has a specific sex system, making it a suitable system for studying the evolution of plant sex determination, adaptive evolution of alpine plants, and mining stress resistance gene resource that cope with the hostile alpine environment. Therefore, Cushion willow has potential value in genetic improvements for willows used as bioenergy crops, in gardening, and as ornamental plants. However, the genome of Cushion willow still contains some un-assembled repetitive sequences, and there is limited availability of a gene expression atlas, which hinders its potential use for the aforementioned purposes. Here, we updated the genome of Cushion willow to be haplotype-resolved and near telomere-to-telomere, and obtained a high-quality transcriptomic map. Our research provides a potential model species for alpine adaptive research, sex determination evolution studies, and improving willow crops.</p>

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A haplotype-resolved genome assembly and gene expression map of Cushion willow

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年5月13日

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  • Jindan Wang,
  • Kaiyun Chen,
  • Rengang Zhang,
  • Yuan Huang,
  • Jiahui Chen

摘要

Salix brachista, commonly known as Cushion willow, is a common component of subnival alpine assemblages and a dioecious or monoecious plant with a creeping stem and numerous lateral branches. Cushion willow takes cuttings more easier and has a specific sex system, making it a suitable system for studying the evolution of plant sex determination, adaptive evolution of alpine plants, and mining stress resistance gene resource that cope with the hostile alpine environment. Therefore, Cushion willow has potential value in genetic improvements for willows used as bioenergy crops, in gardening, and as ornamental plants. However, the genome of Cushion willow still contains some un-assembled repetitive sequences, and there is limited availability of a gene expression atlas, which hinders its potential use for the aforementioned purposes. Here, we updated the genome of Cushion willow to be haplotype-resolved and near telomere-to-telomere, and obtained a high-quality transcriptomic map. Our research provides a potential model species for alpine adaptive research, sex determination evolution studies, and improving willow crops.