首页|The OsCLV2s-OsCRN1 co-receptor regulates grain shape in rice

The OsCLV2s-OsCRN1 co-receptor regulates grain shape in rice

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The highly conserved CLV-WUS negative feedback pathway plays a decisive role in regulating stem cell maintenance in shoot and floral meristems in higher plants,including Arabidopsis,rice,maize,and tomato.Here,we find significant natural variations in the OsCLV2c,OsCLV2d,and OsCRN1 loci in a genome-wide association study of grain shape in rice.OsCLV2a,OsCLV2c,OsCLV2d,and OsCRN1 negatively regulate grain length-width ratio and show distinctive geographical distribution,indica-japonica differentiation,and artificial selection signatures.Notably,OsCLV2a and OsCRN1 interact biochemically and genetically,suggesting that the two components function in a complex to regulate grain shape of rice.Furthermore,the genetic contributions of the haplotypes combining OsCLV2a,OsCLV2c,and OsCRN1 are significantly higher than those of each single gene alone in controlling key yield traits.These findings identify two groups of receptor-like kinases that may function as distinct co-receptors to control grain size in rice,thereby revealing a previously unrecognized role of the CLV class genes in regulating seed development and proposing a framework to understand the molecular mechanisms of the CLV-WUS pathway in rice and other crops.

RiceGrain shapeOsCLV2sOsCRN1Natural variationsIndica-japonica differentiation

Xingxing Li、Meng-en Wu、Juncheng Zhang、Jingyue Xu、Yuanfei Diao、Yibo Li

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National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research(Wuhan),Huazhong Agricultural University,Wuhan,Hubei 430070,China

Hubei Hongshan Laboratory,Wuhan,Hubei 430070,China

STI 2030-Major ProjectsNational Key Research and Development Program of ChinaNational Key Research and Development Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaHubei Hongshan LaboratoryHubei Hongshan LaboratoryKey Research and Development Program of HubeiKey Research and Development Program of HubeiFundamental Research Funds for the Central Universities

2023ZD04069022022YFD12001032023ZD04073U22A2047032072042318210052022hszd0252021hszd0052023BBB1352022BBA00332662023PY002

2024

10.1016/j.jgg.2024.03.011

遗传学报
中国遗传学会 中国科学院遗传与发育生物学研究所

遗传学报

CSTPCD
影响因子：0.821
ISSN：1673-8527
年,卷(期)：2024.51(7)