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Home > Archive>Volume 21, Issue 4, 2020 >975-983. DOI:10.13430/j.cnki.jpgr.20191126002
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Genome-wide Association Study of Root System Architecture Related Traits in Common Wheat (Triticum aestivum L.)
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Affiliation:

1.Jining Academy of Agricultural Sciences, Jining;2.Dezhou Academy of Agricultural Sciences, Dezhou;3.Shandong Academy of Agricultural Sciences, Jinan;4.Agricultural Genomics Institute at Shenzhen, Chinese, Academy of Agricultural Sciences (CAAS), Shenzhen

Fund Project:

The Key Research and Development Program of Shandong Province (2017GNC10107), The support project for grassroots scientific and technological talents of Shandong western economic swells up belt (XB2018FW029), The key Research and Development Program of China (2017YFD0100600), Modern Agricultural Industry Technology System Wheat Innovation Team Construction of Shandong Province (SDAIT-01-17), Agricultural Science and Technology Innovation Project of Shandong Academy of Agricultural Sciences (CXGC2016B01), Natural Science Foundation of Shandong Province (ZR2017BC015), Project funded by Dezhou Academy of Agricultural Sciences (2019-01)

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    Abstract:

    The root system architecture (RSA) determines the composition of the root system and plays an irreplaceable role in crop growth and development. It is of great significance to analyze the genetic mechanism of wheat root architecture and the selection of varieties with better RSA traits in breeding for elite wheat varieties. Genome-wide association study (GWAS) is an effective method to analyze the genetic mechanism of complicated quantitative traits (i.e. RSA) in wheat. In the study, GWAS for RSA-related traits(total root length, total root surface area, total root volume, average root diameter and number of root tips) were conducted in 160 wheat accessions from Henan and Shandong, which were previously genotyped by wheat 660K SNP chip. Twenty-three loci associated with RSA related traits were detected from chromosomes 1A, 2A, 2B, 3B, 4A, 5A, 5B, 5D, 6A, 6B and 7B, and each explained the phenotypic variation variable from 7.2% to 12.8%. Among them, eleven loci are found to coincide with the formerly-reported loci, and the remaining 12 loci are newly identified. Taken together, this study is of significance to uncover the genetic structure of the root architecture with a potential in future breeding of high-yield and stress-resistant wheat cultivars.

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History
  • Received:November 26,2019
  • Revised:January 24,2020
  • Adopted:February 12,2020
  • Online: July 20,2020
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