A serine/threonine protein kinase encoding gene KERNEL NUMBER PER ROW6 regulates maize grain yield

被引：132

作者：

Jia, Haitao ^{[1
]}

Li, Manfei ^{[1
]}

Li, Weiya ^{[2
]}

Liu, Lei ^{[1
,3
]}

Jian, Yinan ^{[1
]}

Yang, Zhixing ^{[2
]}

Shen, Xiaomeng ^{[1
]}

Ning, Qiang ^{[1
]}

Du, Yanfang ^{[1
]}

Zhao, Ran ^{[1
]}

Jackson, David ^{[1
,3
]}

Yang, Xiaohong ^{[2
]}

Zhang, Zuxin ^{[1
]}

机构：

[1] Huazhong Agr Univ, Coll Plant Sci & Technol, Natl Key Lab Crop Genet Improvement, Wuhan 430070, Peoples R China

[2] China Agr Univ, Beijing Key Lab Crop Genet Improvement, State Key Lab Plant Physiol & Biochem, Natl Maize Improvement Ctr China,MOA Key Lab Maiz, Beijing 100193, Peoples R China

[3] Cold Spring Harbor Lab, POB 100, Cold Spring Harbor, NY 11724 USA

来源：

NATURE COMMUNICATIONS | 2020年 / 11卷 / 01期

基金：

中国国家自然科学基金;

关键词：

AUXIN TRANSPORT; REPRODUCTIVE DEVELOPMENT; ARF-GAP; INFLORESCENCE; EXPRESSION; SYSTEM; GENOME; TRAFFICKING; SOFTWARE; ZMPIN1A;

D O I：

10.1038/s41467-020-14746-7

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Increasing grain yield of maize (Zea mays L.) is required to meet the rapidly expanding demands for maize-derived food, feed, and fuel. Breeders have enhanced grain productivity of maize hybrids by pyramiding desirable characteristics for larger ears. However, loci selected for improving grain productivity remain largely unclear. Here, we show that a serine/threonine protein kinase encoding gene KERNEL NUMBER PER ROW6 (KNR6) determines pistillate floret number and ear length. Overexpression of KNR6 or introgression of alleles lacking the insertions of two transposable elements in the regulatory region of KNR6 can significantly enhance grain yield. Further in vitro evidences indicate that KNR6 can interact with an Arf GTPase-activating protein (AGAP) and its phosphorylation by KNR6 may affect ear length and kernel number. This finding provides knowledge basis to enhance maize hybrids grain yield. Selection of kernel number per ear has improved maize yield, but the genetic base is unclear. Here, the authors reveal that a serine/threonine protein kinase KNR6 is a positive regulator of the trait and show in vitro evidences that KNR6 may function through phosphorylating an Arf GTPase-activating protein.

引用

页数：11

共 59 条

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