An-2 Encodes a Cytokinin Synthesis Enzyme that Regulates Awn Length and Grain Production in Rice

doi:10.1016/j.molp.2015.08.001

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	An-2 Encodes a Cytokinin Synthesis Enzyme that Regulates Awn Length and Grain Production in Rice
	Gu, Benguo ; Zhou, Taoying ; Luo, Jianghong ; Liu, Hui ; Wang, Yongchun ; Shangguan, Yingying ; Zhu, Jingjie ; Li, Yan ; Sang, Tao 1; Wang, Zixuan
刊名	MOLECULAR PLANT
	2015
卷号	8 期号:11 页码:1635-1650
关键词	Oryza sativa awn domestication cytokinin synthesis enzyme grain yield
ISSN号	1674-2052
DOI	10.1016/j.molp.2015.08.001
文献子类	Article
英文摘要	A wide range of morphological and physiological traits have changed between cultivated rice Oryza sativa and wild rice Oryza rufipogon under domestication. Here, we report cloning of the An-2 gene, encoding the Lonely Guy Like protein 6 (OsLOGL6), which catalyzes the final step of cytokinin synthesis in O. rufipogon. The near-isogenic line harboring a wild allele of An-2 in the genetic background of the awnless indica Guangluai 4 shows that An-2 promotes awn elongation by enhancing cell division, but decreases grain production by reducing grains per panicle and tillers per plant. We reveal that a genetic variation in the An-2 locus has a large impact on reducing awn length and increasing tiller and grain numbers in domesticated rice. Analysis of gene expression patterns suggests that An-1 regulates the formation of awn primordial, and An-2 promotes awn elongation. Nucleotide diversity of the An-2 locus in cultivated rice was found to be significantly reduced compared with that of wild rice, suggesting that the An-2 locus was subjected to artificial selection. We therefore propose that the selection of genetic variation in An-2 was due to reduced awn length and increased grain yield in cultivated rice.
学科主题	Biochemistry & Molecular Biology ; Plant Sciences
电子版国际标准刊号	1752-9867
出版地	CAMBRIDGE
WOS关键词	LOOP-HELIX PROTEIN ; GENETIC-CONTROL ; DOMESTICATION ; PLANT ; ORIGIN ; SIZE ; OVEREXPRESSION ; ARCHITECTURE ; CULTIVATION ; TRANSITION
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
语种	英语
出版者	CELL PRESS
WOS记录号	WOS:000365049200006
资助机构	Ministry of Science and Technology of China [2013CBA01404, 2012AA10A302] ; Chinese Academy of Sciences [XDA08020101] ; Ministry of Agriculture of China [2014ZX08001004-002-010] ; National Natural Science Foundation of China [31121063, 31471159] ; Science and Technology Commission of Shanghai Municipality [13QA1403900]
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/25647]
专题	系统与进化植物学国家重点实验室
作者单位	1.Chinese Acad Sci, Shanghai Inst Biol Sci, Inst Plant Physiol & Ecol, Natl Ctr Gene Res, Shanghai 200233, Peoples R China 2.Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Key Lab Plant Resources, Beijing 100093, Peoples R China
推荐引用方式 GB/T 7714	Gu, Benguo,Zhou, Taoying,Luo, Jianghong,et al. An-2 Encodes a Cytokinin Synthesis Enzyme that Regulates Awn Length and Grain Production in Rice[J]. MOLECULAR PLANT,2015,8(11):1635-1650.
APA	Gu, Benguo.,Zhou, Taoying.,Luo, Jianghong.,Liu, Hui.,Wang, Yongchun.,...&Han, Bin.(2015).An-2 Encodes a Cytokinin Synthesis Enzyme that Regulates Awn Length and Grain Production in Rice.MOLECULAR PLANT,8(11),1635-1650.
MLA	Gu, Benguo,et al."An-2 Encodes a Cytokinin Synthesis Enzyme that Regulates Awn Length and Grain Production in Rice".MOLECULAR PLANT 8.11(2015):1635-1650.