Genome-Wide Association Study on Root Traits Under Different Growing Environments in Wheat (Triticum aestivum L.)

• DOI: 10.3389/fgene.2021.646712
• Publication Date: 2021-06-10T09:19:43Z
• Authors: Fengdan Xu; Shulin Chen; Xiwen Yang; Sumei Zhou; Junsen Wang; Ziliang Zhang; Yuan Huang; Miao Song; Jun Zhang; Kehui Zhan; Dexian He
• Keywords: Taproot

Plant roots are critical for water and nutrient acquisition, environmental adaptation, yield formation. Herein, 196 wheat accessions from the Huang-Huai Wheat Region of China were collected to investigate six root traits at seedling stage under three growing environments [indoor hydroponic culture (IHC), outdoor (OHC), pot (OPC)] dry weight (RDW) OPC four growth stages in environments. Additionally, a genome-wide association study was performed with 660K SNP Array. The results showed that varied most OPC, followed by those both OHC IHC, elongation faster than culture. Root might help predict OPC. Moreover, significantly negatively correlated grain (GY) grains per spike (GPS), positively thousand-kernel (TKW), weakly number spikes area (SPA). Twelve stable chromosomal regions associated detected on chromosomes 1D, 2A, 4A, 4B, 5B, 6D, unmapped markers. Among them, interval 737.85 742.00 Mb chromosome which regulated total length (TRL), identified Linkage disequilibrium (LD) blocks used identify 27 genes related development. Three TraesCS4A02G484200, TraesCS4A02G484800 , TraesCS4A02G493800 TraesCS4A02G493900 involved cell differentiation expressed high levels tissues. Another vital co-localization 5B (397.72–410.88 Mb) not only RDW but also TKW.