caa a22 4500 445324732 CHVBK 20180317142716.0 cr unu---uuuuu 170323e20110701xx s 000 0 eng 10.1007/s10681-011-0409-y doi (NATIONALLICENCE)springer-10.1007/s10681-011-0409-y Low-nitrogen stress tolerance and nitrogen agronomic efficiency among maize inbreds: comparison of multiple indices and evaluation of genetic variation [Elektronische Daten] [Yongshen Wu, Wenguo Liu, Xinhai Li, Mingshun Li, Degui Zhang, Zhuanfang Hao, Jianfeng Weng, Yunbi Xu, Li Bai, Shihuang Zhang, Chuanxiao Xie] Limited information is available on genetic variation in low-nitrogen (low-N) stress tolerance and N-use efficiency (NUE) among maize inbreds. To unveil this information, a panel of 189 diverse maize inbred lines was evaluated under contrasting levels of N availability over 2years. Low-N agronomic efficiency (LNAE), absolute grain yield (GY) at low-N conditions, and the ratio between GY at low-N and optimum-N conditions were taken into account to represent low-N tolerance. Additionally, N-agronomic efficiency (NAE) along with other agronomic traits was also analyzed. Analysis of variance revealed significant effects of genotype on LNAE, NAE, and GY. The estimated broad-sense heritability was 0.38 for LNAE while it was only 0.11 for NAE, implying that selection based on LNAE should be more effective than NAE. LNAE exhibited highly positive genotypic and phenotypic correlations with GY, ear kernel number (EKN), kernel weight, plant height (PH), and chlorophyll content at low-N conditions, while it was negatively correlated with grain-N content and anthesis-silking interval. Path analysis indicated that the EKN at low-N stress had the highest positive effects on LNAE. Springer Science+Business Media B.V., 2011 Genetic variation nationallicence Low-N stress tolerance nationallicence N-agronomic efficiency nationallicence N-use efficiency nationallicence Maize nationallicence 10 DAP : 10Days after pollination nationallicence CI : Confidence intervals nationallicence NAE : Nitrogen agronomic efficiency (kgkg−1 Nha−1) nationallicence ASI : Anthesis to silking interval (days) nationallicence EKN : Ear kernel number nationallicence G : Genetic correlation nationallicence G WC : Grain yield at no N-fertilizer application control (kgha−1) nationallicence G WF : Grain yield under optimum N-fertilizer application (kgha−1) nationallicence GY : Grain yield (kgha−1) nationallicence h 2 : Broad sense heritability nationallicence HKW : Hundred kernel weight (g) nationallicence N% : N content in dry grain nationallicence N : Nitrogen nationallicence NDP : Nitrogen-depleted plot nationallicence NDVI : Normalized difference vegetation index nationallicence N F : The amount of N fertilizer applied (kgha−1) nationallicence NP : Normal plot with complete fertilizer application nationallicence NUE : N-use efficiency nationallicence PH : Plant height (cm) nationallicence r : Phenotypic correlation nationallicence SPAD : Soil plant analytical development nationallicence Wu Yongshen Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Key Facilities for Crop Gene Resource and Genetic Improvement, 100081, Beijing, China aut Liu Wenguo Institute of Maize Research, Jilin Academy of Agricultural Sciences, 136100, Gong-Zhu-Ling, Jilin, China aut Li Xinhai Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Key Facilities for Crop Gene Resource and Genetic Improvement, 100081, Beijing, China aut Li Mingshun Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Key Facilities for Crop Gene Resource and Genetic Improvement, 100081, Beijing, China aut Zhang Degui Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Key Facilities for Crop Gene Resource and Genetic Improvement, 100081, Beijing, China aut Hao Zhuanfang Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Key Facilities for Crop Gene Resource and Genetic Improvement, 100081, Beijing, China aut Weng Jianfeng Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Key Facilities for Crop Gene Resource and Genetic Improvement, 100081, Beijing, China aut Xu Yunbi Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Key Facilities for Crop Gene Resource and Genetic Improvement, 100081, Beijing, China aut Bai Li Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Key Facilities for Crop Gene Resource and Genetic Improvement, 100081, Beijing, China aut Zhang Shihuang Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Key Facilities for Crop Gene Resource and Genetic Improvement, 100081, Beijing, China aut Xie Chuanxiao Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Key Facilities for Crop Gene Resource and Genetic Improvement, 100081, Beijing, China aut Euphytica Springer Netherlands 180/2(2011-07-01), 281-290 0014-2336 180:2<281 2011 180 10681 https://doi.org/10.1007/s10681-011-0409-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10681-011-0409-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wu Yongshen Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Key Facilities for Crop Gene Resource and Genetic Improvement, 100081, Beijing, China aut NATIONALLICENCE 700 1- Liu Wenguo Institute of Maize Research, Jilin Academy of Agricultural Sciences, 136100, Gong-Zhu-Ling, Jilin, China aut NATIONALLICENCE 700 1- Li Xinhai Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Key Facilities for Crop Gene Resource and Genetic Improvement, 100081, Beijing, China aut NATIONALLICENCE 700 1- Li Mingshun Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Key Facilities for Crop Gene Resource and Genetic Improvement, 100081, Beijing, China aut NATIONALLICENCE 700 1- Zhang Degui Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Key Facilities for Crop Gene Resource and Genetic Improvement, 100081, Beijing, China aut NATIONALLICENCE 700 1- Hao Zhuanfang Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Key Facilities for Crop Gene Resource and Genetic Improvement, 100081, Beijing, China aut NATIONALLICENCE 700 1- Weng Jianfeng Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Key Facilities for Crop Gene Resource and Genetic Improvement, 100081, Beijing, China aut NATIONALLICENCE 700 1- Xu Yunbi Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Key Facilities for Crop Gene Resource and Genetic Improvement, 100081, Beijing, China aut NATIONALLICENCE 700 1- Bai Li Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Key Facilities for Crop Gene Resource and Genetic Improvement, 100081, Beijing, China aut NATIONALLICENCE 700 1- Zhang Shihuang Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Key Facilities for Crop Gene Resource and Genetic Improvement, 100081, Beijing, China aut NATIONALLICENCE 700 1- Xie Chuanxiao Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Key Facilities for Crop Gene Resource and Genetic Improvement, 100081, Beijing, China aut NATIONALLICENCE 773 0- Euphytica Springer Netherlands 180/2(2011-07-01), 281-290 0014-2336 180:2<281 2011 180 10681 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer