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Plant and Soil

, Volume 306, Issue 1–2, pp 95–104 | Cite as

Identification of quantitative trait locus of zinc and phosphorus density in wheat (Triticum aestivum L.) grain

  • Rongli Shi
  • Hongwei Li
  • Yiping Tong
  • Ruilian Jing
  • Fusuo Zhang
  • Chunqin ZouEmail author
Regular Article

Abstract

Zinc (Zn) is an essential micronutrient for human beings. However, Zn malnutrition has become a major problem throughout the world. Wheat is the most important food crop in the world, therefore, developing Zn-enriched wheat varieties provides an effective approach to reduce Zn malnutrition in human beings. The aim of this study was to understand the genetic control of grain Zn density in wheat and hence, to provide genetic basis for breeding wheat with high grain Zn density using molecular approach. A doubled haploid (DH) population developed from a cross between winter wheat varieties Hanxuan10 and Lumai 14 was used to identify quantitative trait loci (QTLs) for Zn concentration and content in wheat grains. In addition, phosphorus (P) concentration and content in wheat grain were also investigated to examine possible interactions between these two nutrients. The wheat grains used in this study were harvested from the plants grown under normal condition in a field trial. We found the grain Zn concentrations of the DH population varied from 25.9 to 50.5 mg/kg and the Zn content varied from 0.90 to 2.21 μg/seed. The grain P concentrations of the DH population varied from 0.258 to 0.429 mg/kg, and the P contents varied from 0.083 to 0.186 mg/seed. A significant positive correlation was observed between Zn and P density in this experiment. The results showed that both grain Zn and P densities were controlled by polygenes. Four and seven QTLs for Zn concentration and Zn content were detected, respectively. All the four QTLs for Zn concentration co-located with the QTLs for Zn content, suggesting a possibility to improve both grain Zn concentration and content simultaneously. Four and six QTLs for P concentration and P content were detected, respectively. The two QTLs for grain Zn concentration on chromosomes 4A and 4D co-located with the QTLs for P concentration. The four QTLs for grain Zn content on chromosome 2D, 3A and 4A co-located with the QTLs for P contents, reflecting the positive correlations between the grain Zn and P density, and providing possibility of improving grain micro- and macronutrient density simultaneously in wheat. In order to improve human health, the effect of P–Zn relation in grain on the Zn bioavailability should also be considered in the future work.

Keywords

Grain zinc density Grain phosphorus density QTLs Triticum aestivum L. 

Notes

Acknowledgements

This research was supported by the National Natural Science Foundation of China (No. 30671239), the Program for Changjiang Scholars and Innovative Research Team in University (IRT0511), and Chinese Academy of Sciences (Grant No. KSCX2-YW-N-056). The authors would like to thank Dr. Junying Su for the assistance in statistical analysis of the data. The authors are also grateful to Dr. Graham Lyons in Adelaide University of Australia and Dr. Min Du in USA for their helpful comments on the manuscript.

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Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  • Rongli Shi
    • 1
  • Hongwei Li
    • 2
  • Yiping Tong
    • 2
  • Ruilian Jing
    • 3
  • Fusuo Zhang
    • 1
  • Chunqin Zou
    • 1
    Email author
  1. 1.Department of Plant NutritionChina Agricultural UniversityBeijingChina
  2. 2.The State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijingChina
  3. 3.Institute of Crop ScienceChinese Academy of Agricultural SciencesBeijingChina

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