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Characterization of a Novel Weak Allele of RGA1/D1 and Its Potential Application in Rice Breeding 被引量:2
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作者 LIU Yantong LI Ting +12 位作者 JIANG Zhishu ZENG Chuihai HE Rong QIU Jiao LIN Xiaoli PENG Limei SONG Yongping ZHOU Dahu CAI Yicong ZHU Changlan FU Junru HE Haohua XU Jie 《Rice science》 SCIE CSCD 2022年第6期522-534,I0021,I0022,共15页
Semi-dwarfing improves the lodging resistance and yield of rice,and the vast majority of modern rice varieties harbor the sd1 allele to decrease plant height,resulting in reduced genetic diversity and negative agronom... Semi-dwarfing improves the lodging resistance and yield of rice,and the vast majority of modern rice varieties harbor the sd1 allele to decrease plant height,resulting in reduced genetic diversity and negative agronomic traits.Thus,exploring alternative sources of dwarfism is imperative for rice breeding.Here,we identified a novel RGA1 allele,d1-w,from a local indica variety Xiaolixiang(XLX)using a map-based cloning approach.Compared with other rice varieties,RGA1 in XLX contained a unique single nucleotide polymorphism that resulted in an additional transcript and reduced functional RGA1 transcript level.The RGA1 from Nipponbare was introduced into XLX to estimate the value of d1-w in rice breeding.Compared with transgenic XLX plants(XLX^(D1)),XLX exhibited reduced plant height,increased stem strength,lower reactive oxygen species accumulation,delayed senescence,stronger photosynthesis,higher grain yield and quality(including external,milling and nutritional qualities),and enhanced resistance to drought and Rhizoctonia solani.Therefore,we proposed that the d1-w allele has potential as an excellent dwarfism resource for rice breeding. 展开更多
关键词 rice weak allele RGA1 dwarf germplasm resource yield grain quality drought resistance sheath blight
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