Screening of Sugarcane with High Nitrogen Efficiency at Seedling Stage
Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2020, Vol. 41 ›› Issue (11): 2205-2218.DOI: 10.3969/j.issn.1000-2561.2020.11.009

• Germplasm Resources, Genetics & Breeding • Previous Articles     Next Articles

Screening of Sugarcane with High Nitrogen Efficiency at Seedling Stage

YANG Liu1,LIAO Fen1,*(),Muhammad ANAS2,LI Qiang2,PENG Lishun3,HUANG Dongliang1,LI Yangrui1,*()   

  1. 1. Sugarcane Research Institute, Guangxi Academy of Agricultural Sciences / Guangxi Key Laboratory of Sugarcane Genetic Improvement / Key Laboratory of Sugarcane Biotechnology and Genetic Improvement (Guangxi), Ministry of Agriculture & Rural affairs, Nanning, Guangxi 530007, China
    2. College of Agriculture, Guangxi University, Nanning, Guangxi 530004, China
    3. Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan 571101, China
  • Received:2018-11-29 Revised:2019-05-08 Online:2020-11-25 Published:2020-12-23
  • Contact: LIAO Fen,LI Yangrui

Abstract:

The purpose of the experiment is to screen high nitrogen use efficiency (NUE) genotypes under a low nitrogen pressure selection system. Furthermore, the important indexes which affecting the NUE of sugarcane were analyzed. The results could provided a theoretical basis for the high NUE breeding and cultivation of sugarcane. In the study, seedlings of 58 sugarcane genotypes were evaluated in a hydroponic experiment with low-N (0.2 mmol/L N) and normal-N (2 mmol/L N) treatment. The growth, dry biomass and N cumulative and distribution characteristic in various organs were evaluated according to descriptive statistic, principal component analysis and cluster analysis. The results indicated that morphology, biomass, nitrogen efficiency traits showed high genotypic variation for N treatments. Under low-N treatment, the dry biomass of 58 genotypes varied from 0.64 to 14.75 g/plant, nitrogen accumulation was from 5.53 to 63.00 mg/plant and NUE was from 115.40 to 279.30 g/g. Four factors were extracted with variance contribution approximated to 92.35%, according to 25 parameters such as dry biomass and N uptake with N deficiency. And another five factors were extracted with variance contribution approximated to 82.21%, according to 19 parameters under both normal and low N treatment such as nitrogen transfer coefficient, genetic potential. The data revealed that dry biomass (whole plant, leaf, root), N uptake (whole plant, leaf, shoot), NUE (whole plant, leaf), leaf relative NUE, shoot relative dry weight, shoot relative N uptake, shoot genetic potential were the key factors that involved in sugarcane high NUE. 58 sugarcane genotypes were clustered into four group: high NUE group, slightly higher NUE group, slightly lower NUE group and low group.

Key words: sugarcane, genotype, seedling stage, high nitrogen use efficiency, screen index

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