文献类型： 外文期刊
作者： Li, Gangling 1 ; Xu, Bingxia 1 ; Zhang, Yanpei 1 ; Xu, Yawen 1 ; Khan, Najeeb Ullah 1 ; Xie, Jianyin 1 ; Sun, Xingming 1 ;
作者机构： 1.China Agr Univ, Coll Agron & Biotechnol, State Key Lab Agrobiotechnol, Beijing Key Lab Crop Genet Improvement, Beijing, Peoples R China
2.Chinese Acad Agr Sci, Inst Crop Sci, Beijing, Peoples R China
关键词： germplasm; Regulator of Grain Number1; grain number per panicle; MYB transcription factor
期刊名称：PLANT BIOTECHNOLOGY JOURNAL （ 影响因子：9.803； 五年影响因子：9.555 ）
ISSN： 1467-7644
年卷期：
页码：
收录情况： SCI
摘要： Yield in rice is determined mainly by panicle architecture. Using map-based cloning, we identified an R2R3 MYB transcription factor REGULATOR OF GRAIN NUMBER1 (RGN1) affecting grain number and panicle architecture. Mutation of RGN1 caused an absence of lateral grains on secondary branches. We demonstrated that RGN1 controls lateral grain formation by regulation of LONELY GUY (LOG) expression, thus controlling grain number and shaping panicle architecture. A novel favourable allele, RGN1(C), derived from the Or-I group in wild rice affected panicle architecture by means longer panicles. Identification of RGN1 provides a theoretical basis for understanding the molecular mechanism of lateral grain formation in rice; RGN1 will be an important gene resource for molecular breeding for higher yield.
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