Variability of nitrogen use efficiency by foxtail millet cultivars at the seedling stage
| Autor: | Chen ErYing, Yang YanBing, Wang Runfeng, Guan YanAn, Liu Bin, Yu Shuting, Qin Ling, Zhang HuaWen, Wang HaiLian |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Setaria Setaria italica ecological cultivars Agriculture (General) chemistry.chemical_element 01 natural sciences S1-972 Crop Genetic variation Cultivar biology 04 agricultural and veterinary sciences biology.organism_classification Nitrogen Agronomy chemistry Seedling Foxtail Shoot 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Animal Science and Zoology nitrogen uptake efficiency Agronomy and Crop Science 010606 plant biology & botany |
| Zdroj: | Pesquisa Agropecuária Brasileira Pesquisa Agropecuária Brasileira v.55 2020 Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
| ISSN: | 1678-3921 0100-204X |
| DOI: | 10.1590/s1678-3921.pab2020.v55.00832 |
| Popis: | The objective of this work was to identify the genetic variation of foxtail millet (Setaria italica) cultivars, from three ecogeographic origins in China, regarding the uptake and utilization of N by the genotypes at the seedling stage, aiming at the genetic improvement of this crop. Seedlings of 79 cultivars were fertilized with a nutrient solution, on a sand substrate, and evaluated under low-N (LN, 0.2 mmol L-1) and high-N (HN, 6.0 mmol L-1) concentrations. A large variation was observed between cultivars, among the three ecogeographic regions, for shoot biomass, shoot N content and concentration, and N use efficiency (NUE), uptake efficiency (NupE), and utilization efficiency (NutE), especially under HN conditions. Cultivars of Northwest China showed the highest variation for shoot biomass, N content, NUE, and NupE. A strong positive correlation was observed between NUE and NupE, and NUE and NutE, but there was no correlation between NupE and NutE. NupE accounted for 77.6% of the total variation of NUE, and NutE for the rest. The uptake and utilization of N show a large variation among the foxtail millet cultivars at the seedling stage, and the variation of N uptake contributes more than that of N utilization to the variation of N use efficiency. |
| Databáze: | OpenAIRE |
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