Genome-Wide Association Analysis for Candidate Genes Contributing to Kernel-Related Traits in Maize

• DOI: 10.3389/fpls.2022.872292
• Publication Date: 2022-05-24T09:19:26Z
• Authors: Zhibo Qu; Ying Wu; Die Hu; Ting Li; Hangyu Liang; Fan Ye; Jiquan Xue; Shutu Xu
• Keywords: Kernel (algebra); Candidate gene

Maize grain size is the main factor determining yield. Dissecting genetic basis of maize may help reveal regulatory mechanism seed development and yield formation. In this study, two associated populations were used for genome-wide association analysis kernel length, width, thickness, hundred-kernel weight from multiple locations in AM122 AM180, respectively. Then, mapping was performed based on 6H90K SNP chip. A total 139 loci identified as with four traits p < 1 × 10-4 using models (FarmCPU MLM). The transcriptome data showed that 15 them expressed differentially maize-inbred lines KB182 (small kernel) KB020 (big during development. These candidate genes enriched regulating peroxidase activity, oxidoreductase, leaf senescence. molecular function major binding catalytic activity. This study provided important reference information exploring mechanisms applying markers high-yield breeding.