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Comparison of Grain Zinc and Iron Concentration between Synthetic Hexaploid Wheats and Their Parents

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Deficiencies of iron (Fe) and zinc (Zn) in human food afflict a large proportion of the world’s population. Wheat is a major food source of minerals. One way to enhance bread wheat’s ability to enrich these minerals would be to take advantage of diversity of wild species by creating synthetic hexaploid wheat (SW). In this study, two minerals (Fe and Zn) concentrated in the grain of Aegilops tauschii Coss. (2n = 2x = 14, DD), Triticum turgidum L. (2n = 4x = 28, AABB), and 33 lines of their corresponding SW (2n = 2x = 42, AABBDD) were evaluated. The results showed that Fe concentration was decreased in most of SW lines compared with their parental Aegilops tauschii accessions, while Zn concentration was greatly increased in most of SW lines compared with their parental Aegilops tauschii accessions. Aegilops tauschii had stronger Fe enrichment than Triticum turgidum while they expressed the same ability for Zn enrichment. The genotypic variance based on their physiological performance was analyzed. SW lines showed less genotypic variance of Fe and Zn concentration than Aegilops tauschii. SW lines showed less genotypic variance of Fe concentration than Triticum turgidum L. lines while they had more genotypic variance of Zn concentration than Triticum turgidum L. lines. Regardless of the fact that the traits expressed in wild relatives of wheat may not predict the traits that will be expressed in SW lines derived from them, production of SW could be a powerful method creating genotypes with enhanced trait expression.
Cite this paper
Zhang, B. , Chen, W. , Liu, B. , Zhang, L. , Zhao, D. , Xiao, Y. , Liu, D. and Zhang, H. (2014) Comparison of Grain Zinc and Iron Concentration between Synthetic Hexaploid Wheats and Their Parents. Agricultural Sciences, 5, 1433-1439. doi: 10.4236/as.2014.514154. 
 

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