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Comparative genomic and transcriptomic analyses uncover the molecular basis of high nitrogen-use efficiency in the wheat cultivar Kenong 9204

查看全文 作　　者：Xiaoli [1]Shi;Fa [2]Cui;Xinyin [3,7]Han;Yilin [1,6]He;Long [1,6]Zhao;Na [1,4]Zhang;Hao [1,6]Zhang;Haidong [3]Zhu;Zhexin [1]Liu;Bin [5]Ma;Shusong [1]Zheng;Wei [1,4]Zhang;Jiajia [1,4]Liu;Xiaoli [1,4]Fan;Yaoqi [1,6]Si;Shuiquan [1,6]Tian;Jianqing [1,6]Niu;Huilan [1]Wu;Xuemei [1,6]Liu;Zhuo [5]Chen;Deyuan [1,4]Meng;Xiaoyan [1,4]Wang;Liqiang [1,4]Song;Lijing [1,4]Sun;Jie [1,4]Han;Hui [1,4]Zhao;Jun [1,4]Ji;Zhiguo [1,4]Wang;Xiaoyu [3,7]He;Ruilin [3]Li;Xuebin [3,7]Chi;Chengzhi [5,6]Liang;Beifang [3,7]Niu;Jun [1,8]Xiao;Junming [1,4]Li;Hong-Qing [1,6,9]Ling 高影响力作者 机构地区：[1]State Key Laboratory of Plant Cell and Chromosome Engineering,Institute of Genetics and Developmental Biology,Innovation Academy for Seed Design,Chinese Academy of Sciences,Beijing 100101,China;[2]Key Laboratory of Molecular Module-Based Breeding of High Yield and Abiotic Resistant Plants in Universities of Shandong,College of Agriculture,Ludong University,Yantai 264025,China;[3]Computer Network Information Center,Chinese Academy of Sciences,Beijing 100190,China;[4]Center for Agricultural Resources Research,Institute of Genetics and Developmental Biology,Chinese Academy of Sciences,Shijiazhuang 050022,China;[5]State Key Laboratory of Plant Genomics,Institute of Genetics and Developmental Biology,Innovation Academy for Seed Design,Chinese Academy of Sciences,Beijing 100101,China;[6]College of Advanced Agricultural Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;[7]School of Computer Science and Technology,University of Chinese Academy of Sciences,Beijing 100049,China;[8]CAS-JIC Centre of Excellence for Plant and Microbial Science,Institute of Genetics and Developmental Biology,Chinese Academy of Sciences,Beijing 100101,China;[9]Yazhou Bay Seed Laboratory of Hainan Province,Sanya 572019,China高影响力机构 出　　处：《Molecular Plant》索引2022年第15卷第9期,共17页高影响力期刊 基　　金：supported by the National Natural Science Foundation of China(grant nos.31921005 and 31991211);the Strategic Priority Research Program of the Chinese Academy of Sciences(grant nos.XDA24010104,XDA24010204,and XDA24030102);the Special Information Program of the Chinese Academy of Sciences(grant no.XXH13506-408);the China Agricultural Research System(grant no.CARS-03). 摘　　要：Studying the regulatory mechanisms that drive nitrogen-use efficiency(NUE)in crops is important for sustainable agriculture and environmental protection.In this study,we generated a high-quality genome assembly for the high-NUE wheat cultivar Kenong 9204 and systematically analyzed genes related to nitrogen uptake and metabolism.By comparative analyses,we found that the high-affinity nitrate transporter gene family had expanded in Triticeae.Further studies showed that subsequent functional differentiation endowed the expanded family members with saline inducibility,providing a genetic basis for improving the adaptability of wheat to nitrogen deficiency in various habitats.To explore the genetic and molecular mechanisms of high NUE,we compared genomic and transcriptomic data from the high-NUE cultivar Kenong 9204(KN9204)and the low-NUE cultivar Jing 411 and quantified their nitrogen accumulation under high-and low-nitrogen conditions.Compared with Jing 411,KN9204 absorbed significantly more nitrogen at the reproductive stage after shooting and accumulated it in the shoots and seeds.Transcriptome data analysis revealed that nitrogen deficiency clearly suppressed the expression of genes related to cell division in the young spike of Jing 411,whereas this suppression of gene expression was much lower in KN9204.In addition,KN9204 maintained relatively high expression of NPF genes for a longer time than Jing 411 during seed maturity.Physiological and transcriptome data revealed that KN9204 was more tolerant of nitrogen deficiency than Jing 411,especially at the reproductive stage.The high NUE of KN9204 is an integrated effect controlled at different levels.Taken together,our data provide new insights into the molecular mechanisms of NUE and important gene resources for improving wheat cultivars with a higher NUE trait. 关 键 词：WHEAT genome sequencing spatiotemporal gene expression expansion and differentiation of gene family nitrogen use efficiency Kenong 9204
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