Improved nitrogen efficiency in winter oilseed rape hybrid compared with the parental lines under contrasting nitrogen supply
文献类型：期刊论文
| 作者 | Wang, Li1; Lu, Piaopiao2; Ren, Tao2; Liu, Tao2; Geilfus, Christoph-Martin3; Lu, Jianwei2 |
| 刊名 | INDUSTRIAL CROPS AND PRODUCTS
 |
| 出版日期 | 2020-11-01 |
| 卷号 | 155页码:8 |
| 关键词 | Brassica napus L. Nitrogen efficiency Nitrogen uptake Nitrogen utilization Nitrogen remobilization Hybrid Genotypic variation Heterosis |
| ISSN号 | 0926-6690 |
| DOI | 10.1016/j.indcrop.2020.112777 |
| 英文摘要 | Winter oilseed rape (Brassica napus L.) is distinguished by poor nitrogen (N) efficiency but heavy N balance surplus. Cultivation of oilseed rape hybrids has been suggested as an important strategy to enhance the N efficiency and to reduce the large N balance surpluses in this crop, but the underlying physiological mechanism remains not well understood. In this study, seed yield and N efficiency parameters of an oilseed rape hybrid and its parental lines were investigated under contrasting N fertilization levels over three site-years. Seed yield-N uptake relationships were analyzed by quantile regression fitting a logarithmic model to both the 99th yield quantile and the whole data set. The maximum achievable yield (Yield(MAX)) of the hybrid was greater than the parental lines at a wide range of N uptake levels; in addition, the gap in yield between Yield(MAX) and actual yields for the hybrid was smaller than for its parents, indicating higher yield stability against environmental stresses. At both low (0 kg N ha(-1)) and high N (180 kg N ha(-1)) supply, the hybrid accumulated more N, which contributed to the yield heterosis. The higher seed yield of the hybrid was also related to the higher N utilization efficiency at the high N rate, which was attributed primarily to the improved N harvest index (NHI), but there was no genotypic difference in seed N concentration. Further analysis of seed N origins highlighted the importance of leaf and stem N remobilization other than post-flowering N uptake for genotypic variation in NHI at high N supply. These results suggest heterosis in seed yield and stability as a consequence of higher maximum yield attainable at a wide range of N uptake levels and smaller yield gaps. A higher capacity of N uptake contributed to the yield heterosis regardless of N levels. Additionally, efficient leaf and stem N remobilization also contributed the yield heterosis at high N supply. |
| 资助项目 | National Key Research and Development Program of China[2018YFD0200900] |
| WOS研究方向 | Agriculture |
| 语种 | 英语 |
| WOS记录号 | WOS:000571868400006 |
| 出版者 | ELSEVIER |
| 源URL | [http://202.127.146.157/handle/2RYDP1HH/15743]  |
| 专题 | 中国科学院武汉植物园 |
| 通讯作者 | Lu, Jianwei |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Aquat Bot & Watershed Ecol, Wuhan Bot Garden, Wuhan 430074, Peoples R China 2.Huazhong Agr Univ, Coll Resources & Environm, Wuhan 430070, Peoples R China 3.Humboldt Univ, Albrecht Daniel Thaer Inst Agr & Hort Sci, Div Controlled Environm Hort, Albrecht Thaer Weg 1, D-14195 Berlin, Germany |
| 推荐引用方式 GB/T 7714 | Wang, Li,Lu, Piaopiao,Ren, Tao,et al. Improved nitrogen efficiency in winter oilseed rape hybrid compared with the parental lines under contrasting nitrogen supply[J]. INDUSTRIAL CROPS AND PRODUCTS,2020,155:8. |
| APA | Wang, Li,Lu, Piaopiao,Ren, Tao,Liu, Tao,Geilfus, Christoph-Martin,&Lu, Jianwei.(2020).Improved nitrogen efficiency in winter oilseed rape hybrid compared with the parental lines under contrasting nitrogen supply.INDUSTRIAL CROPS AND PRODUCTS,155,8. |
| MLA | Wang, Li,et al."Improved nitrogen efficiency in winter oilseed rape hybrid compared with the parental lines under contrasting nitrogen supply".INDUSTRIAL CROPS AND PRODUCTS 155(2020):8. |
入库方式： OAI收割
来源：武汉植物园
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