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<p>MYB transcription factors play a crucial role in plant growth, development, and disease resistance. However, the evolutionary and functional characteristics of the MYB gene family in Rosaceae species remain insufficiently explored. We conducted a multidimensional analysis of MYB transcription factors, encompassing the evolution of the MYB family, their functional characteristics, and their relationships with biological traits. This comprehensive analytical approach integrates bioinformatics, network analysis, and machine learning techniques. We identified 5251 MYB genes across 20 plant species, categorizing them into 15 subfamilies. Notable differences in family size and expansion patterns were observed among different species. Whole-genome duplications (WGD) serve as the primary driving force behind the expansion of the MYB family. In <i>Pyrus betulaefolia</i>, Gene Ontology (GO) enrichment and expression pattern analyses indicated that MYB genes play significant roles in stress responses and hormone signaling pathways. During the infection phase of <i>Valsa pyri</i> (<i>Vp</i>), the majority of MYB genes exhibited upregulated expression. Through <i>K</i>-means clustering, Weighted Gene Co-expression Network Analysis (WGCNA), and RT-qPCR validation, it was determined that <i>PbeMYB144</i> and <i>PbeMYB358</i> are involved in resistance to <i>Vp</i>. Our findings provide insights into the evolutionary adaptability of the MYB gene family and its potential applications in plant disease defense.</p>

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Evolution and Expression Regulation Analysis of MYB Transcription Factor in Resistance to Valsa Canker of Pyrus betulaefolia

  • 期刊论文

  • 发表日期：

    2025年9月11日

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  • Xin Wang,
  • Lianxin Zhao,
  • Chenglong Du,
  • Yanlan Guo,
  • Qinde Zhang,
  • Fubiao Nie,
  • Bingming Zhang,
  • Cunwu Zuo,
  • Cai He

摘要

MYB transcription factors play a crucial role in plant growth, development, and disease resistance. However, the evolutionary and functional characteristics of the MYB gene family in Rosaceae species remain insufficiently explored. We conducted a multidimensional analysis of MYB transcription factors, encompassing the evolution of the MYB family, their functional characteristics, and their relationships with biological traits. This comprehensive analytical approach integrates bioinformatics, network analysis, and machine learning techniques. We identified 5251 MYB genes across 20 plant species, categorizing them into 15 subfamilies. Notable differences in family size and expansion patterns were observed among different species. Whole-genome duplications (WGD) serve as the primary driving force behind the expansion of the MYB family. In Pyrus betulaefolia, Gene Ontology (GO) enrichment and expression pattern analyses indicated that MYB genes play significant roles in stress responses and hormone signaling pathways. During the infection phase of Valsa pyri (Vp), the majority of MYB genes exhibited upregulated expression. Through K-means clustering, Weighted Gene Co-expression Network Analysis (WGCNA), and RT-qPCR validation, it was determined that PbeMYB144 and PbeMYB358 are involved in resistance to Vp. Our findings provide insights into the evolutionary adaptability of the MYB gene family and its potential applications in plant disease defense.