Open AccessRGN1 controls grain number and shapes panicle architecture in rice
Author(s) -
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
Publication year - 2022
Publication title -
plant biotechnology journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.525
H-Index - 115
eISSN - 1467-7652
pISSN - 1467-7644
DOI - 10.1111/pbi.13702
Subject(s) - panicle , biology , grain yield , myb , allele , hybrid , agronomy , mutant , transcription factor , gene , genetics
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.