首页|qGW11a/OsCAT8,encoding an amino acid permease,negatively regulates grain size and weight in rice
qGW11a/OsCAT8,encoding an amino acid permease,negatively regulates grain size and weight in rice
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Grain size is a key factor influencing grain weight in rice.In this study,a chromosome segment substitu-tion line(CSSL9-17)was identified,that exhibits a significant reduction in both grain size and weight compared to its donor parent 93-11.Further investigation identified two quantitative trait loci(QTL)on chromosome 11,designated qGW11a and qGW11b,which contribute to 1000-grain weight with an additive effect.LOC_Os11g05690,encoding the amino acid permease OsCAT8,is the target gene of qGW11a.Overexpression of OsCAT8 resulted in decreased grain weight,while OsCAT8 knockout mutants exhibited increased grain weight.The 287-bp located within the OsCAT8 promoter region of 93-11 neg-atively regulates its activity,which is subsequently correlated with an increase in grain size and weight.These results suggest that OsCAT8 functions as a negative regulator of grain size and grain weight in rice.
State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China,Rice Research Institute,Sichuan Agricultural University,Chengdu 611130,Sichuan,China
国家自然科学基金Postdoctoral Fellowship Program of CPSF四川省科技计划Open Project ProgramState Key Laboratory of Crop Gene Exploration and Utilization in Southwest China
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