RGN1 controls grain number and shapes panicle architecture in rice. Issue 1 (22nd September 2021)

• Record Type: Journal Article
• Authors: Li, Gangling; Xu, Bingxia; Zhang, Yanpei; Xu, Yawen; Khan, Najeeb Ullah; Xie, Jianyin; Sun, Xingming; Guo, Haifeng; Wu, Zhenyuan; Wang, Xueqiang; Zhang, Hongliang; Li, Jinjie; Xu, Jianlong; Wang, Wensheng; Zhang, Zhanying; Li, Zichao
• Is Part Of: Plant biotechnology journal. Volume 20:Issue 1(2022)
• Page Start: 158
• Page End: 167
• Publication Date: 2021-09-22
• Subjects: germplasm -- Regulator of Grain Number1 -- grain number per panicle -- MYB transcription factor; Plant biotechnology -- Periodicals; Plant genetic engineering -- Periodicals; 630.272
• DOI: 10.1111/pbi.13702
• Languages: English
• ISSNs: 1467-7644

Abstract

Summary: 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.