Scholarlink

<p>Many wild relatives of wheat in the <i>Triticeae</i> tribe&#xa0;provide important genetic resources for crop improvement, but their complex, polyploid genomes shaped by hybridization remain poorly understood. Here, we assemble and analyze the genomes of <i>Thinopyrum intermedium</i> and <i>Roegneria kamoji</i>, two species commonly used in wheat hybridization. We show that <i>Th. intermedium</i> contains genomic contributions from <i>Pseudoroegneria</i> (St), <i>Dasypyrum</i> (V), and <i>Aegilops</i> (J), while <i>R. kamoji</i> contains subgenomes related to <i>Pseudoroegneria</i> (St), <i>Dasypyrum</i> (V-related “Y”), and <i>Hordeum</i> (H). Phylogenomic evidence indicates that both species underwent independent polyploidization events, with <i>Pseudoroegneria</i> serving as the original maternal donor. <i>R. kamoji</i> likely evolved from tetraploid <i>Roegneria</i>. We also identify two <i>Fhb7</i> homologs in the St and H subgenomes of <i>R. kamoji</i> that enhance <i>Fusarium</i> head blight resistance in a dosage-dependent manner. These findings refine the understanding of <i>Triticeae</i> polyploid evolution and offer valuable genomic resources for wheat improvement and forage breeding.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Analysis wheat wild relatives Thinopyrum intermedium and Roegneria kamoji genomes reveal different polyploid evolution paths

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年8月18日

查看全文
  • Silong Sun,
  • Naixiu Che,
  • Liyang Chen,
  • Yongchao Hao,
  • Yongchang Xu,
  • Qingyang Chen,
  • Wenyang Ge,
  • Shuangshuang Qin,
  • Wenxiu Zhang,
  • Chunmei Dong,
  • Jianqiang Li,
  • Yuxin Liu,
  • Fangfang Yan,
  • Long Han,
  • Zhangwei Liu,
  • Liang Zhang,
  • Chengzhi Jiang,
  • Zujun Yang,
  • Hongwei Wang,
  • Lingrang Kong

摘要

Many wild relatives of wheat in the Triticeae tribe provide important genetic resources for crop improvement, but their complex, polyploid genomes shaped by hybridization remain poorly understood. Here, we assemble and analyze the genomes of Thinopyrum intermedium and Roegneria kamoji, two species commonly used in wheat hybridization. We show that Th. intermedium contains genomic contributions from Pseudoroegneria (St), Dasypyrum (V), and Aegilops (J), while R. kamoji contains subgenomes related to Pseudoroegneria (St), Dasypyrum (V-related “Y”), and Hordeum (H). Phylogenomic evidence indicates that both species underwent independent polyploidization events, with Pseudoroegneria serving as the original maternal donor. R. kamoji likely evolved from tetraploid Roegneria. We also identify two Fhb7 homologs in the St and H subgenomes of R. kamoji that enhance Fusarium head blight resistance in a dosage-dependent manner. These findings refine the understanding of Triticeae polyploid evolution and offer valuable genomic resources for wheat improvement and forage breeding.