• ISSN 1008-505X
  • CN 11-3996/S
裴雪霞, 王姣爱, 党建友, 张定一. 耐低氮小麦基因型筛选指标的研究[J]. 植物营养与肥料学报, 2007, 13(1): 93-98. DOI: 10.11674/zwyf.2007.0116
引用本文: 裴雪霞, 王姣爱, 党建友, 张定一. 耐低氮小麦基因型筛选指标的研究[J]. 植物营养与肥料学报, 2007, 13(1): 93-98. DOI: 10.11674/zwyf.2007.0116
PEI Xue-xia, WANG Jiao-ai, DANG Jian-you, ZHANG Ding-yi. An approach to the screening index for low nitrogen tolerant wheat genotype[J]. Journal of Plant Nutrition and Fertilizers, 2007, 13(1): 93-98. DOI: 10.11674/zwyf.2007.0116
Citation: PEI Xue-xia, WANG Jiao-ai, DANG Jian-you, ZHANG Ding-yi. An approach to the screening index for low nitrogen tolerant wheat genotype[J]. Journal of Plant Nutrition and Fertilizers, 2007, 13(1): 93-98. DOI: 10.11674/zwyf.2007.0116

耐低氮小麦基因型筛选指标的研究

An approach to the screening index for low nitrogen tolerant wheat genotype

  • 摘要: 以12个小麦基因型为研究对象,采用溶液培养与田间试验的方法,设低氮胁迫和正常供氮2个水平,对耐低氮小麦基因型的筛选指标进行了探讨,为氮高效基因型小麦育种提供理论依据。结果表明,小麦植株干重在低氮胁迫和正常供氮条件下都有较大的基因型变异(变异系数CV分别为29.03%和18.21%);在所有调查性状的相对值中,相对植株干重(低氮胁迫/正常供氮)基因型变异较大(CV为22.76%)。相关性分析表明,相对植株干重与相对株高、相对植株吸氮量和相对氮利用效率间呈极显著正相关(P0.01),且溶液培养试验中相对植株干重和田间试验中相对子粒产量(不施氮/施氮)间呈极显著正相关(r=0.77**,n=12)。因此,以小麦苗期相对植株干重作为筛选指标,然后进行田间验证,是筛选耐低氮小麦基因型行之有效的途径。

     

    Abstract: Screening and breeding low nitrogen(N) tolerant wheat genotype is one of the effective alternatives to alleviate pollution of environment,and increase the utilization efficiency of N fertilizer.A simple and scientific screening index plays an important role in the screening and breeding program.In this study,a hydroponic experiment and a field trial were carried out to screen the index for low N tolerant wheat genotypes under N stress and normal N supply condition,respectively.Results showed that total dry weight showed a significant genotypic variation at both normal and low N supply(the CV was 18.21%and 29.03%,respectively).Relative dry weight(low N supply/normal N supply) also showed a significant genotypic variation(CV was 22.73%).Correlation analysis showed that relative dry weight was highly significantly correlated to relative plant height,relative total N uptake,and relative N utilization efficiency(P0.01).The relative total dry weight of wheat in solution culture system was significantly correlated to the relative grain yield(minus-N/plus-N) in field trial(r=0.77**,n=12).Therefore,relative total dry weight at seedling stage would probably be an effective screening indexfor screening wheat genotype which tolerant to low N.

     

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