Characterization of Exotic, Native and Wild-Type Genotypes of Sugarcane (Saccharum spp. Hybrids) for Internal Nitrogen Use Efficiency Under Different Nitrogen Levels

文献类型： 外文期刊

第一作者： Anas, Muhammad

作者： Anas, Muhammad;Li, Qiang;Xing, Yong-Xiu;Li, Yang-Rui;Anas, Muhammad;Verma, Krishan K.;Liao, Fen;Li, Yang-Rui;Ul Haq, Ikram;Naeem, Muhammad

作者机构：

关键词： Sugarcane; Genotypes; Nitrogen; Internal nitrogen use efficiency

期刊名称：SUGAR TECH （ 影响因子：1.591； 五年影响因子：1.688 ）

ISSN： 0972-1525

年卷期： 2021 年 23 卷 6 期

页码：

收录情况： SCI

摘要： Sugarcane is the main source of sugar and biofuel, and its low nitrogen use efficiency (NUE) limits the production of sugarcane and disturbs the ecosystem. In this study, fifty-eight sugarcane genotypes (26 genotypes from foreign sources, 22 from China and 10 were wild type) were tested under N fertilization rates 0.2, and 2 mM. Dry weight increased with respect to the nitrogen (N) levels and about 8, 6 and 5 times for GT37, CC92-85 and Co1149 whereas within genotypes variation was 28 and 23 times for normal and low N levels, respectively. Average N uptake of Q177 was 3 and twofold less for normal and low N rates than FJ1 and LiuCheng05-136. Partial factor productivity (PFP), uptake efficiency (UpE) and iNUE had inverse relation to N levels, iNUE and PFP decreased 2 and 2.5 folds as N level increased while UpE was non-significant. GXASF108-1-11 and GT11 were observed as efficient and inefficient genotypes for both N levels simultaneously. Fj1 genotype had maximum UI and shoot-root ratio under normal N level. Shoot-root ratio increased threefold across the N levels and positive correlation of N uptake was observed for all other parameters except iNUE and shoot-root ratio. According to principal component analysis, the most contributing factors were N uptake, PFP, UI and iNUE which defined NUE of genotypes. Heat map clustered into 3-4 groups all the related genotypes. These characterized genotypes can be further used to investigate the mechanism of NUE.

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