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Home > Archive>Volume 22, Issue 2, 2021 >438-447. DOI:10.13430/j.cnki.jpgr.20200903002
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Genome Wide Association Analysis of Flowering Traits in Sweet and Waxy Maize under Cadmium Stress
Author:
Affiliation:

1Chongqing Academy of Agricultural Science,Chongqing,401329; 2Maize Research Institute of Sichuan Agricultural University,Chengdu,611130;3Crop Research Institute, Fujian Academy of Agricutural Sciences/Fujian Engineering Research Center for Characteristic Dry crop varieties Breeding, Fuzhou, 350013; 4Crop research Institute, Guangdong Academy of Agricultural Science,Guangzhou,510640; 5Zhejiang Academy of Agricultural Science,Dongyang,322105;6Biotechnology and Nuclear Technology Research Institute,Chengdu,610061

Fund Project:

The Project of Technology Innovation and Application Demonstration of Chongqing;The agricultural Development Fund Project of Chongqing Academy of Agricultural Sciences

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    Abstract:

    In this study, 183 sweet and waxy maize inbred lines were subjected to analyze the flowering time (Days to anthesis, DA), silking time (Days to silking, DS) and Anthesis silking interval (ASI) under Cd-polluted environments, in order to reveal the response and possible regulatory genes at the flowering stage. The results showed that Cd pollution prolonged DA and DS of sweet and waxy maize, especially for DS, which led to the increasing of ASI. The ASI value of waxy maize was found to be lower than that of sweet maize, implying the sensitivity of sweet corn under Cd stress. Three and six SNPs, which were associated with flowering time and silking time, respectively, were detected by Genome-wide association analysis (GWAS). These SNPs were found to be associated with eight genes annotated in maize GDB and NCBI gene databases, including few genes which were reported roles in the flowering time. Collectively, these results might provide theoretical reference for molecular marker assisted breeding and Cd safe breeding of sweet and waxy maize varieties in the future.

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History
  • Received:September 03,2020
  • Revised:November 03,2020
  • Adopted:November 20,2020
  • Online: March 09,2021
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