Natural variations of HvSRN1 modulate the spike rachis node number in barley
作者机构：Key Laboratory of Grain Crop Genetic Resources Evaluation and Utilization(MARA)The National Key Facility for Crop Gene Resources and Genetic ImprovementInstitute of Crop SciencesChinese Academy of Agricultural Sciences(ICS-CAAS)Beijing 100081China Hainan Yazhou Bay Seed LaboratorySanya 572025China Institute of Industrial CropsShandong Academy of Agricultural SciencesJinan 250100China Key Laboratory of Crop Heterosis and UtilizationBeijing Key Laboratory of Crop Genetic ImprovementChina Agricultural UniversityBeijing 100193China Key Laboratory for Crop Molecular Breeding of Ministry of Agriculture and Rural AffairsInstitute of Food CropsHubei Academy of Agricultural SciencesWuhan 430064China
出 版 物：《Plant Communications》 (植物通讯（英文）)
年 卷 期：2024年第5卷第1期
页 面：148-163页
核心收录：
基 金：supported by the National Key R&D Program of China (2018YFD1000706) Hainan Yazhou Bay Seed Laboratory (B21Y10214) the National Natural Science Foundation of China (no.31771774) the Agricultural Science and Technology Innovation Program,and the China Agricultural Research System (CARS-05)
主 题：barley fine-mapping grain number kernel weight
摘 要：Grain number,one of the major determinants of yield in Triticeae crops,is largely determined by spikelet number and spike rachis node number(SRN).Here,we identified three quantitative trait loci(QTLs)for SRN using 145 recombinant inbred lines derived from a barley R90/1815D ***1,the major-effect QTL,was mapped to chromosome 2H and explained up to 38.77%of SRN ***-based cloning revealed that qSRN1 encodes the RAWUL domain-containing protein *** analysis revealed that two key SNPs in the HvSRN1 promoter region(-2 kb upstream of the transcription start site)affect the transcript level of HvSRN1 and contribute to variation in *** to its orthologous proteins OsLAX2 and ZmBA2,HvSRN1 showed protein–protein interactions with HvLAX1,suggesting that the LAX2–LAX1 model for spike morphology regulation may be conserved in Poaceae ***-Cas9-induced HvSRN1 mutants showed reduced SRN but increased grain size and weight,demonstrating a trade-off *** results shed light on the role of HvSRN1 variation in regulating the balance between grain number and weight in barley.
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