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Barley FASCIATED EAR genes determine inflorescence meristem size and yield traits

The Crop Journal 2023年第3期11卷 679-691页

作者： Chengyu Wang Xiujunan Yang Yueya Zhang Chaoqun Shen Jin Shi Chongjing Xia Taohong Fang Qiang Tu Ling Li Xinli Zhou Dabing Zhang Gang Li School of Life Sciences and Engineering Southwest University of Science and TechnologyMianyang 629000SichuanChina School of Agriculture Food and WineWaite Research InstituteThe University of AdelaideAdelaide 5005SAAustralia School of Life Science and Biotechnology Shanghai Jiao Tong UniversityShanghai 200240China Department of Plant Pathology College of Plant ProtectionNanjing Agricultural UniversityNanjing 210095JiangsuChina

In flowering plants,the inflorescence meristem(IM)provides founder cells to form successive floral meristems,which are precursors of fruits and *** activity and developmental progression of IM are thus critical for yield production in seed *** some cereals,such as rice(Oryza sativa)and maize(Zea mays),the size of undifferentiated IM,which is located at the inflorescence apex,is positively associated with yield traits such as spikelet ***,the relationship between IM size and yieldrelated spike traits remains unknown in the Triticeae *** we report that IM size has a negative correlation with yield traits in barley(Hordeum vulgare).Three FASCIATED EAR(FEA)orthologs,HvFEA2,HvFEA3,and HvFEA4,regulate IM size and spike morphogenesis and ultimately affect yield *** HvFEAs genes are highly expressed in developing spikes,and all three loss-of-function mutants exhibit enlarged IM size,shortened spikes,and reduced spikelet number,which may lead to reduced grain *** variations identified in HvFEAs indicate selection events during barley *** further reveal that HvFEA4,as a transcription factor,potentially targets multiple pathways during reproductive development,including transcriptional control,phytohormone signaling,and redox *** roles of barley FEA genes in limiting IM size and promoting spikelet formation suggest the potential of increasing yield by manipulating IM activity.

关键词： inflorescence meristem Yield traits FASCIATED EAR genes Gene expression Barley

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Transcriptome profiling reveals phase-specific gene expression in the developing barley inflorescence

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The Crop Journal 2020年第1期8卷 71-86页

作者： Huiran Liu Gang Li Xiujuan Yang Hendrik N.J.Kuijer Wanqi Liang Dabing Zhang Joint International Research Laboratory of Metabolic&Developmental Sciences Shanghai Jiao Tong University–University of Adelaide Joint Centre for Agriculture and HealthState Key Laboratory of Hybrid RiceSchool of Life Sciences and BiotechnologyShanghai Jiao Tong UniversityShanghai 200240China School of Agriculture Food and WineThe University of AdelaideSouth Australia 5064Australia

The shape of an inflorescence varies among cereals,ranging from a highly branched panicle in rice to a much more compact spike in barley(Hordeum vulgare L.)and wheat(Triticum aestivum L.).However,little is known about the molecular basis of cereal inflorescence *** profiled transcriptomes at three developmental stages of the barley main shoot apex—spikelet initiation,floral organ differentiation,and floral organ growth—and compared them with those from vegetative seedling *** analyses identified 3688 genes differentially transcribed between the three meristem stages,with a further 1394 genes preferentially expressed in reproductive compared with vegetative *** assembly and Gene Ontology analysis classified these 4888 genes into 28 clusters,revealing distinct patterns for genes such as transcription factors,histone modification,and cell-cycle progression specific for each stage of inflorescence *** also compared expression patterns of VRS(SIX-ROWED SPIKE)genes and auxin-,gibberellic acid-and cytokinin-associated genes between two-rowed and six-rowed barley to describe regulators of lateral spikelet *** findings reveal barley inflorescence phase-specific gene expression,identify new candidate genes that regulate barley meristem activities and flower development,and provide a new genetic resource for further dissection of the molecular mechanisms of spike development.

关键词： inflorescence meristem Transcriptome Gene expression Hormones Barley

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