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Article

Q allele overexpression and alternative splicing can improve wheat yield by increasing thousand-kernel weight and grain number per spike.

BMC plant biology - 24 Jan 2026

Li Qingcheng, Fan Yazhen, Li Yang, Lei Lu, Zhang Shengling, Xie Simin, Lu Lifen, Hu Xin, Lv Fengqi, Guo Zhenru, Chen Xin, Zhou Linlin, Wang Yan, Zhu Jing, Kong Li, Yuan Xin, Deng Jie, Xu Binjie, Cao Xinyou, Jiang Yunfeng, Chen Guoyue, Xu Qiang, Jiang Qiantao, Wei Yuming, Zheng Youliang, Chen Qing, Qi Pengfei

Abstract excerpt

BACKGROUND: Thousand-kernel weight and grain number per spike are key determinants of grain yield. Q is one of the most important domestication genes in wheat. A missense mutation (C3129T) at the microRNA172-binding site of Q (Qc1 allele) significantly increases the thousand-kernel weight, but also results in extremely compact spikes, leading to decreases in grain number per spike and yield, which is unfavorable...

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PMID: 41580627
DOI: 10.1186/s12870-026-08188-4
PMCID: PMC12910859

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