biostudies-literatureLi PSoft Science Research Project from Science & Technology Department of Sichuan Province, ChinaNational Key Research and Development Program "Seven Crop Breeding" key project of ChinaThe Key Program for International S&amp;T CooperationNational Natural Science Foundation of ChinaThe “One Belt and One Road” Project of International Partners Program from Bureau Of International Cooperation, Chinese Academy of ScienceThe CAS “Light of West China” ProgramThe Key Program for International S&T CooperationNational Key Research and Development Program “Seven Crop Breeding” key project of ChinaSoutheast Asia Biodiversity Research Institute, Chinese Academy of SciencesSoft Science Research Project from Science &amp; Technology Department of Sichuan Province, ChinaStrategic Priority Research Program of Chinese Academy of SciencesThe "One Belt and One Road" Project of International Partners Program from Bureau Of International Cooperation, Chinese Academy of ScienceThe CAS "Light of West China" Program73https://www.ebi.ac.uk/biostudies/studies/S-EPMC7561663biostudies-literatureUnknown13(1)<h4>Background</h4>Grain shape is a critical agronomic trait affecting grain yield and quality. Exploration and functional characterization of grain shape-related genes will facilitate rice breeding for higher quality and yield.<h4>Results</h4>Here, we characterized a recessive mutant named Oat-like rice for its unique grain shape which highly resembles oat grains. The Oat-like rice displayed abnormal floral organs, an open hull formed by remarkably elongated leafy lemmas and paleae, occasionally formed conjugated twin brown rice, an aberrant grain shape and a low seed setting rate. By map-based cloning, we discovered that Oat-like rice harbors a novel allele of OsMADS1 gene (OsMADS1^Olr), which has a spontaneous point mutation that causes the substitution of an amino acid that iRice (New York, N.Y.)Characterization of the 'Oat-Like Rice' Caused by a Novel Allele OsMADS1^Olr Reveals Vital Importance of OsMADS1 in Regulating Grain Shape in Oryza sativa L.PMC75616632017HH002517ZR025131501379Y5C4201151751KYSB201800062017YFD0100201Y4ZK111B01XDA24020304Li HGu YLi PYue LSun XZhuang YLuo DWei MLiu YLu LLiu ZTu SHuang WWang STang YfalseCharacterization of the 'Oat-Like Rice' Caused by a Novel Allele OsMADS1^Olr Reveals Vital Importance of OsMADS1 in Regulating Grain Shape in Oryza sativa L.<h4>Background</h4>Grain shape is a critical agronomic trait affecting grain yield and quality. Exploration and functional characterization of grain shape-related genes will facilitate rice breeding for higher quality and yield.<h4>Results</h4>Here, we characterized a recessive mutant named Oat-like rice for its unique grain shape which highly resembles oat grains. The Oat-like rice displayed abnormal floral organs, an open hull formed by remarkably elongated leafy lemmas and paleae, occasionally formed conjugated twin brown rice, an aberrant grain shape and a low seed setting rate. By map-based cloning, we discovered that Oat-like rice harbors a novel allele of OsMADS1 gene (OsMADS1^Olr), which has a spontaneous point mutation that causes the substitution of an amino acid that i2020-01-01T00:00:00Z2020 Oct2025-06-01T02:57:13.355Z2020-10-29T14:49:53ZS-EPMC75616633306322910.1186/s12284-020-00428-x