Nature
Abstract
The intensive application of inorganic nitrogen underlies marked increases in crop production, but imposes detrimental effects on ecosystems: it is therefore crucial for future sustainable agriculture to improve the nitrogen-use efficiency of crop plants. Here we report the genetic basis of nitrogen-use efficiency associated with adaptation to local soils in rice (Oryza sativaL.). Using a panel of diverse rice germplasm collected from different ecogeographical regions, we performed a genome-wide association study on the tillering response to nitrogen—the trait that is most closely correlated with nitrogen-use efficiency in rice—and identifiedOsTCP19as a modulator of this tillering response through its transcriptional response to nitrogen and its targeting to the tiller-promoting geneDWARF AND LOW-TILLERING(DLT). A 29-bp insertion and/or deletion in theOsTCP19promoter confers a differential transcriptional response and variation in the tillering response to nitrogen among rice varieties. The allele ofOsTCP19associated with a high tillering response to nitrogen is prevalent in wild rice populations, but has largely been lost in modern cultivars: this loss correlates with increased local soil nitrogen content, which suggests that it might have contributed to geographical adaptation in rice. Introgression of the allele associated with a high tillering response into modern rice cultivars boosts grain yield and nitrogen-use efficiency under low or moderate levels of nitrogen, which demonstrates substantial potential for rice breeding and the amelioration of negative environment effects by reducing the application of nitrogen to crops.
| 论文编号: | DOI:10.1038/s41586-020-03091-w |
| 论文题目: | Genomic Basis of Geographical Adaptation to Soil Nitrogen in Rice |
| 英文论文题目: | Genomic Basis of Geographical Adaptation to Soil Nitrogen in Rice |
| 第一作者: | Yongqiang Liu, Hongru Wang, Zhimin Jiang, Wei Wang, Ruineng Xu, Qihui Wang, Zhihua Zhang, Aifu Li, Yan Liang, Shujun Ou, Xiujie Liu, Shouyun Cao, Hongning Tong, Yonghong Wang, Feng Zhou, Hong Liao, Bin Hu & Chengcai Chu |
| 英文第一作者: | Yongqiang Liu, Hongru Wang, Zhimin Jiang, Wei Wang, Ruineng Xu, Qihui Wang, Zhihua Zhang, Aifu Li, Yan Liang, Shujun Ou, Xiujie Liu, Shouyun Cao, Hongning Tong, Yonghong Wang, Feng Zhou, Hong Liao, Bin Hu & Chengcai Chu |
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| 发表年度: | 2021-01-07 |
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| 摘要: | The intensive application of inorganic nitrogen underlies marked increases in crop production, but imposes detrimental effects on ecosystems: it is therefore crucial for future sustainable agriculture to improve the nitrogen-use efficiency of crop plants. Here we report the genetic basis of nitrogen-use efficiency associated with adaptation to local soils in rice (Oryza sativaL.). Using a panel of diverse rice germplasm collected from different ecogeographical regions, we performed a genome-wide association study on the tillering response to nitrogen—the trait that is most closely correlated with nitrogen-use efficiency in rice—and identifiedOsTCP19as a modulator of this tillering response through its transcriptional response to nitrogen and its targeting to the tiller-promoting geneDWARF AND LOW-TILLERING(DLT). A 29-bp insertion and/or deletion in theOsTCP19promoter confers a differential transcriptional response and variation in the tillering response to nitrogen among rice varieties. The allele ofOsTCP19associated with a high tillering response to nitrogen is prevalent in wild rice populations, but has largely been lost in modern cultivars: this loss correlates with increased local soil nitrogen content, which suggests that it might have contributed to geographical adaptation in rice. Introgression of the allele associated with a high tillering response into modern rice cultivars boosts grain yield and nitrogen-use efficiency under low or moderate levels of nitrogen, which demonstrates substantial potential for rice breeding and the amelioration of negative environment effects by reducing the application of nitrogen to crops. |
| 英文摘要: | The intensive application of inorganic nitrogen underlies marked increases in crop production, but imposes detrimental effects on ecosystems: it is therefore crucial for future sustainable agriculture to improve the nitrogen-use efficiency of crop plants. Here we report the genetic basis of nitrogen-use efficiency associated with adaptation to local soils in rice (Oryza sativaL.). Using a panel of diverse rice germplasm collected from different ecogeographical regions, we performed a genome-wide association study on the tillering response to nitrogen—the trait that is most closely correlated with nitrogen-use efficiency in rice—and identifiedOsTCP19as a modulator of this tillering response through its transcriptional response to nitrogen and its targeting to the tiller-promoting geneDWARF AND LOW-TILLERING(DLT). A 29-bp insertion and/or deletion in theOsTCP19promoter confers a differential transcriptional response and variation in the tillering response to nitrogen among rice varieties. The allele ofOsTCP19associated with a high tillering response to nitrogen is prevalent in wild rice populations, but has largely been lost in modern cultivars: this loss correlates with increased local soil nitrogen content, which suggests that it might have contributed to geographical adaptation in rice. Introgression of the allele associated with a high tillering response into modern rice cultivars boosts grain yield and nitrogen-use efficiency under low or moderate levels of nitrogen, which demonstrates substantial potential for rice breeding and the amelioration of negative environment effects by reducing the application of nitrogen to crops. |
| 刊物名称: | Nature |
| 英文刊物名称: | Nature |
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| 其它备注: | Yongqiang Liu, Hongru Wang, Zhimin Jiang, Wei Wang, Ruineng Xu, Qihui Wang, Zhihua Zhang, Aifu Li, Yan Liang, Shujun Ou, Xiujie Liu, Shouyun Cao, Hongning Tong, Yonghong Wang, Feng Zhou, Hong Liao, Bin Hu & Chengcai Chu. Genomic Basis of Geographical Adaptation to Soil Nitrogen in Rice. Nature. DOI:10.1038/s41586-020-03091-w |
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