Identification and Confirmation of Loci Associated With Canopy Wilting in Soybean Using Genome-Wide Association Mapping

• DOI: 10.3389/fpls.2021.698116
• Publication Date: 2021-07-14T11:04:46Z
• Authors: Siva K. Chamarthi; Avjinder S. Kaler; Hussein Abdel-Haleem; Felix B. Fritschi; Jason D. Gillman; Jeffery D. Ray; James R. Smith; Arun P. Dhanapal; Charles A. King; Larry C. Purcell
• Keywords: Wilting; Candidate gene; Association mapping; Drought Tolerance; Genome-wide Association Study

Drought causes significant soybean [ Glycine max (L.) Merr.] yield losses each year in rain-fed production systems of many regions. Genetic improvement for drought tolerance is a cost-effective approach to stabilize under management. The objectives this study were confirm previously reported loci and identify novel associated with canopy wilting (CW) using panel 200 diverse maturity group (MG) IV accessions. These accessions along six checks planted at site-years an augmented incomplete block design three replications irrigated treatments. Association mapping, 34,680 single nucleotide polymorphisms (SNPs), identified 188 SNPs CW that likely tagged 152 loci. This includes 87 coincident previous studies 68 101 84 We also determined the ability genomic estimated breeding values (GEBVs) from research predict different genotypes environments. A positive relationship ( P ≤ 0.05;0.37 r 0.5) was found between observed GEBVs. In vicinity SNPs, 183 candidate genes both SNPs. Among these genes, 57 present within coding proteins biological functions involved plant stress responses. may be directly or indirectly transpiration water conservation. confirmed regions important resource pyramiding favorable alleles and, as candidates selection, enhancing tolerance.