Genome-Wide association Study Identifies Candidate Genes Related to Oleic acid content of Soybean Seed

Abstract

Background: Soybeans [Glycine max (L.) Merr] originated in China and has been cultivated for more than 3000 years. Soybean oil is a complex mixture of five fatty acids (palmitic, stearic, oleic, linoleic, and linolenic). Soybean oil with high oleic acid content is desirable because this monounsaturated fatty acid improves the oxidative stability of the oil. To investigate the genetic architecture of oleic acid in soybean seed. 260 Soybean germplasms from Northeast China were collected as the natural population. A genome-wide association study (GWAS) was conducted in a panel of 260 germplasm resources.Results: Phenotypic identification result showed that the content of oleic acid varied from 8.2% to 35.0%. 2,311,337 single nucleotide polymorphism (SNP) markers were obtained. GWAS analysis showed that there were many genes related to oleic acid content with contribution rate 7%. The candidate genes Glyma.11G229600.