Grain zinc and iron concentrations of Chinese wheat landraces and cultivars and their responses to foliar micronutrient applications  

作　　者：JIANG Li-na MA Jing-li WANG Xiao-jie LIU Gang-gang ZHU Zhao-long QI Chen-yang ZHANG Ling-fang LI Chun-xi WANG Zhi-min HAO Bao-zhen 

机构地区：[1]College of Life Sciences,Henan Normal University,Xinxiang 453007,P.R.China [2]chool of Life Science and Basic Medicine,Xinxiang University,Xinxiang 453003,P.R.China [3]College of Agronomy,China Agricultural University,Beijing 100193,P.R.China

出　　处：《Journal of Integrative Agriculture》2022年第2期532-541,共10页农业科学学报（英文版）

基　　金：supported by the National Key Research and Development Program of China(2018YFD0300705 and 2017YFD0301101);the National Key Technologies R&D Program of China during the 13th Five-Year Plan period(2013BAD07B14);the Key Science and Technology Program of Higher Education Institutions in Henan Province,China(20B210017);the Scientific and Technological Project of Henan Province,China(202102110168)。

摘　　要：Grain zinc(Zn) and iron(Fe) concentrations and their responses to foliar application of micronutrients in 28 Chinese wheat landraces and 63 cultivars were investigated in a two-year field experiment. The average grain Zn and Fe concentrations were 41.8 mg kg^(-1)(29.0-63.3 mg kg^(-1)) and 39.7 mg kg^(-1)(27.9-67.0 mg kg^(-1)), respectively. Compared with cultivars, landraces had greater grain Zn(11.0%) and Fe(4.8%) concentrations but lower harvest index(HI), grain weight per spike(GWS), grain number per spike(GNS) and thousand grain weight(TGW). Both Zn and Fe concentrations were negatively and significantly correlated with HI, GWS, and GNS, while showed a poor association with TGW, suggesting that lower HI, GWS, and GNS, but not TGW, accounted for higher Zn and Fe concentrations for landraces than for cultivars. Grain Zn concentrations of both cultivars and landraces significantly increased after foliar Zn spray and the increase was two-fold greater for landraces(12.6 mg kg^(-1)) than for cultivars(6.4 mg kg^(-1)). Foliar Fe spray increased grain Fe concentrations of landraces(3.4 mg kg^(-1)) and cultivars(1.2 mg kg^(-1)), but these increases were not statistically significant. This study showed that Chinese wheat landraces had higher grain Zn and Fe concentrations than cultivars, and greater increases occurred in grain Zn concentration than in grain Fe concentration in response to fertilization, suggesting that Chinese wheat landraces could serve as a potential genetic source for enhancing grain mineral levels in modern wheat cultivars.

关 键 词：wheat CULTIVAR LANDRACE foliar application of micronutrients 

分 类 号：S512.1[农业科学—作物学]