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An ARF gene mutation creates flint kernel architecture in dent maize

文献类型： 外文期刊

作者： Wang, Haihai 1 ; Huang, Yongcai 1 ; Li, Yujie 1 ; Cui, Yahui 1 ; Xiang, Xiaoli 1 ; Zhu, Yidong 1 ; Wang, Qiong 1 ; Wang, Xiaoqing 4 ; Ma, Guangjin 1 ; Xiao, Qiao 1 ; Huang, Xing 1 ; Gao, Xiaoyan 1 ; Wang, Jiechen 1 ; Lu, Xiaoduo 5 ; Larkins, Brian A. 6 ; Wang, Wenqin 7 ; Wu, Yongrui 1 ;

作者机构： 1.Chinese Acad Sci, Shanghai Inst Plant Physiol & Ecol, CAS Ctr Excellence Mol Plant Sci, Natl Key Lab Plant Mol Genet, Shanghai 200032, Peoples R China

2.Sichuan Agr Univ, State Key Lab Crop Gene Explorat & Utilizat Southw, Chengdu 611130, Peoples R China

3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

4.Shanghai Acad Agr Sci, Forestry & Pomol Res Inst, Shanghai 201403, Peoples R China

5.Qilu Normal Univ, Inst Mol Breeding Maize, Jinan 250200, Peoples R China

6.Univ Arizona, Sch Plant Sci, Tucson, AZ 85721 USA

7.Shanghai Normal Univ, Coll Life Sci, Shanghai Key Lab Plant Mol Sci, Shanghai 200234, Peoples R China

期刊名称：NATURE COMMUNICATIONS （ 影响因子：14.7； 五年影响因子：16.1 ）

ISSN：

年卷期： 2024 年 15 卷 1 期

页码：

收录情况： SCI

摘要： Dent and flint kernel architectures are important characteristics that affect the physical properties of maize kernels and their grain end uses. The genes controlling these traits are unknown, so it is difficult to combine the advantageous kernel traits of both. We found mutation of ARFTF17 in a dent genetic background reduces IAA content in the seed pericarp, creating a flint-like kernel phenotype. ARFTF17 is highly expressed in the pericarp and encodes a protein that interacts with and inhibits MYB40, a transcription factor with the dual functions of repressing PIN1 expression and transactivating genes for flavonoid biosynthesis. Enhanced flavonoid biosynthesis could reduce the metabolic flux responsible for auxin biosynthesis. The decreased IAA content of the dent pericarp appears to reduce cell division and expansion, creating a shorter, denser kernel. Introgression of the ARFTF17 mutation into dent inbreds and hybrids improved their kernel texture, integrity, and desiccation, without affecting yield.

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