The genetic control of glabrous glume during African rice domestication  

作　　者：Leqin Chang Min Hu Jing Ning Wei He Jiayu Gao Marie-Noelle Ndjiondjop Yongcai Fu Fengxia Liu Hongying Sun Ping Gu Chuanqing Sun Zuofeng Zhu 

机构地区：[1]State Key Laboratory for Agrobiotechnology,National Center for Evaluation of Agricultural Wild Plants(Rice),Department of Plant Genetics and Breeding,China Agricultural University,Beijing 100193,China [2]Africa Rice Center,Cotonou,Benin [3]State Key Laboratory of Plant Physiology and Biochemistry,China Agricultural University,Beijing 100193,China

出　　处：《Journal of Genetics and Genomics》2022年第5期427-436,共10页遗传学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(31925029)。

摘　　要：African cultivated rice,Oryza glaberrima,is characterized by its glabrous glumes.During domestication,the pubescent glumes of its wild ancestor,Oryza barthii,lost their trichomes,and in this study,we show that glabrous glume 5(GLAG5),a WUSCHEL-like homeobox transcription factor gene on chromosome 5,is required for trichome development.DNA methylation associated with an hATtransposable element inserted in the promoter region of GLAG5 is found to reduce its expression,leading to the formation of glabrous glumes and leaves in African cultivated rice.Among 82 African cultivated rice varieties investigated in this study,59(approximately 71%)lines exhibit glabrous glumes and harbor the hAT transposon;however,the other 23 varieties(approximately 29%),which exhibit pubescent glumes,lack the hAT transposon,indicating that glag5 had undergone strong artificial selection.Theπ;/π;ratios also show the hAT transposon insertions influence the genetic diversity of an approximately 150-kb interval encompassing the GLAG5 locus.The identification of the GLAG5 gene provides new insights into the domestication of cultivated rice in Africa.We speculate that the selection of varieties with mutations in their promoter regions is an important aspect of crop domestication.

关 键 词：African rice The hAT transposon DOMESTICATION TRICHOMES Evolution 

分 类 号：S511[农业科学—作物学]