Wheat FRIZZY PANICLE activates VERNALIZATION1-A and HOMEOBOX4-A to regulate spike development in wheat

文献类型： 外文期刊

第一作者： Li, Yongpeng

作者： Li, Yongpeng;Zhao, Meicheng;Guo, Lin;Guo, Xinxin;Zhang, Aimin;Fu, Xiangdong;Li, Junming;Liu, Xigang;Li, Long;Jing, Ruilian;Guo, Lin;Zhao, Dan;Cui, Sujuan;Liu, Xigang;Batool, Aamana;Batool, Aamana;Dong, Baodi;Xu, Hongxing;Xu, Hongxing

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关键词： supernumerary spikelets; WFZP; VRN1; TaHOX4; spike architecture; bread wheat

期刊名称：PLANT BIOTECHNOLOGY JOURNAL （ 影响因子：9.803； 五年影响因子：9.555 ）

ISSN： 1467-7644

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收录情况： SCI

摘要： Kernel number per spike determined by the spike or inflorescence development is one important agricultural trait for wheat yield that is critical for global food security. While a few important genes for wheat spike development were identified, the genetic regulatory mechanism underlying supernumerary spikelets (SSs) is still unclear. Here, we cloned the wheat FRIZZY PANICLE (WFZP) gene from one local wheat cultivar. WFZP is specifically expressed at the sites where the spikelet meristem and floral meristem are initiated, which differs from the expression patterns of its homologs FZP/BD1 in rice and maize, indicative of its functional divergence during species differentiation. Moreover, WFZP directly activates VERNALIZATION1 (VRN1) and wheat HOMEOBOX4 (TaHOX4) to regulate the initiation and development of spikelet. The haplotypes analysis showed that the favourable alleles of WFZP associated with spikelet number per spike (SNS) were preferentially selected during breeding. Our findings provide insights into the molecular and genetic mechanisms underlying wheat spike development and characterize the WFZP as elite resource for wheat molecular breeding with enhanced crop yield.

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