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The tin1 gene retains the function of promoting tillering in maize

Author

Listed:
  • Xuan Zhang

    (China Agricultural University)

  • Zhelong Lin

    (China Agricultural University)

  • Jian Wang

    (China Agricultural University)

  • Hangqin Liu

    (China Agricultural University)

  • Leina Zhou

    (China Agricultural University)

  • Shuyang Zhong

    (China Agricultural University)

  • Yan Li

    (China Agricultural University)

  • Can Zhu

    (China Agricultural University)

  • Jiacheng Liu

    (China Agricultural University)

  • Zhongwei Lin

    (China Agricultural University)

Abstract

Sweet maize and popcorn retain tillering growth habit during maize diversification. However, the underlying molecular genetic mechanism remains unknown. Here, we show that the retention of maize tillering is controlled by a major quantitative trait locus (QTL), tin1, which encodes a C2H2-zinc-finger transcription factor that acts independently of tb1. In sweet maize, a splice-site variant from G/GT to C/GT leads to intron retention, which enhances tin1 transcript levels and consequently increases tiller number. Comparative genomics analysis and DNA diversity analysis reveal that tin1 is under parallel selection across different cereal species. tin1 is involved in multiple pathways, directly represses two tiller-related genes, gt1 and Laba1/An-2, and interacts with three TOPLESS proteins to regulate the outgrowth of tiller buds. Our results support that maize tin1, derived from a standing variation in wild progenitor teosinte population, determines tillering retention during maize diversification.

Suggested Citation

  • Xuan Zhang & Zhelong Lin & Jian Wang & Hangqin Liu & Leina Zhou & Shuyang Zhong & Yan Li & Can Zhu & Jiacheng Liu & Zhongwei Lin, 2019. "The tin1 gene retains the function of promoting tillering in maize," Nature Communications, Nature, vol. 10(1), pages 1-13, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-13425-6
    DOI: 10.1038/s41467-019-13425-6
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    Cited by:

    1. Yan Li & Jian Wang & Shuyang Zhong & Qiang Huo & Qun Wang & Yunlu Shi & Hangqin Liu & Jiacheng Liu & Yang Song & Xiaojian Fang & Zhongwei Lin, 2024. "MADS-box encoding gene Tunicate1 positively controls maize yield by increasing leaf number above the ear," Nature Communications, Nature, vol. 15(1), pages 1-15, December.

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