Dissecting the genetic architecture of sunflower disc diameter using genome‐wide association study

• DOI: 10.1002/pld3.70010
• Publication Date: 2024-10-10T13:56:26Z
• Authors: Yavuz Delen; Ravi V. Mural; Semra Palali‐Delen; Gen Xu; James C. Schnable; Ismail Dweikat; Jinliang Yang
• Keywords: Genetic architecture; Genome-wide Association Study; Association (psychology); Genetic Association

Abstract Sunflower ( Helianthus annuus L.) plays an essential role in meeting the demand for edible oil worldwide. The yield of sunflower seeds encompasses several component traits, including disc diameter. Over three consecutive years, 2019, 2020, and 2022, we assessed phenotypic variation diameter across a diverse set accessions (N = 342) replicated field trials. Upon aggregating data from multiple estimated broad sense heritability H 2 ) trait to be 0.88. A subset N 274 was genotyped by using tunable genotyping‐by‐sequencing (tGBS) method, resulting 226,779 high‐quality SNPs. Using these SNPs phenotype, conducted genome‐wide association study (GWAS) employing two statistical approaches: mixed linear model (MLM) fixed random circulating probability unification (farmCPU). MLM farmCPU GWAS approaches identified 106 8 significant located close 53 21 genes, respectively. analysis peaks: prominent signal on chromosome 10 relatively weaker 16, both which were also detected farmCPU. genetic loci associated with diameter, as well related candidate present promising avenues further functional validation serve basis improvement.