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<p>Breeding ideotype maize for high-density planting is crucial for increasing yield but is hindered by a limited understanding of plant architecture regulation. Here we uncover a prominent role for the accumulation of homozygous favorable alleles in genes regulating four principal shoot traits constituting a maize ideotype, and we identify and functionally validate eight architecture-regulating genes. Guided by genomics, we selected the elite hybrid Yufeng303 as a chassis to develop five improved parental lines by pyramiding favorable alleles of these eight genes together with genome-wide loci associated with these traits. These improved parental lines led to the creation of four new hybrids better suited for high-density planting, achieving 4.1–9.2% higher plot yields than Yufeng303 across eight environments. This study exemplifies the power of genomics-guided breeding of ideotype maize for high densities and serves as a template for informed hybrid improvement of other appropriate crops.</p>

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Breeding ideotype maize with enhanced yield through genomics-guided pyramiding of favorable alleles

  • 期刊论文

  • 发表日期：

    2026年3月17日

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  • Wen Yao,
  • Lixia Ku,
  • Baobao Wang,
  • Zhenzhen Ren,
  • Huihui Su,
  • Chengwei Li,
  • Huafeng Liu,
  • Haixia Zeng,
  • Zhixue Liu,
  • Dongling Zhang,
  • Yazhou Wang,
  • Xinle Zhu,
  • Qiannan Zhao,
  • Xiaomeng Hu,
  • Chongyu Sun,
  • Shengbo Han,
  • Jiafa Chen,
  • Miaomiao Bao,
  • Tianyi Li,
  • Haiyang Wang,
  • Yanhui Chen

摘要

Breeding ideotype maize for high-density planting is crucial for increasing yield but is hindered by a limited understanding of plant architecture regulation. Here we uncover a prominent role for the accumulation of homozygous favorable alleles in genes regulating four principal shoot traits constituting a maize ideotype, and we identify and functionally validate eight architecture-regulating genes. Guided by genomics, we selected the elite hybrid Yufeng303 as a chassis to develop five improved parental lines by pyramiding favorable alleles of these eight genes together with genome-wide loci associated with these traits. These improved parental lines led to the creation of four new hybrids better suited for high-density planting, achieving 4.1–9.2% higher plot yields than Yufeng303 across eight environments. This study exemplifies the power of genomics-guided breeding of ideotype maize for high densities and serves as a template for informed hybrid improvement of other appropriate crops.