Mining Candidate Genes and Favorable Haplotypes for Flag Leaf Shape in Rice (Oryza sativa L.) Based on a Genome-Wide Association Study

The shape of the rice flag leaf affects yield. Therefore, detection quantitative trait loci (QTLs) and alleles related to is great significance for yield improvement. in 2019 2020, we carried out a genome-wide association study length (FLL), width (FLW), length–width ratio (FLR), area (FLA), considering 1.3 million single-nucleotide polymorphisms (SNPs) 173 accessions, order investigate effects various genes on shape. An abundance phenotypic variation was found, with respect four parameters these accessions. We identified one significant SNP position associated FLL FLR chromosome 5 FLW 2, which were detected both two years period through general linear model (GLM) mixed (MLM). Furthermore, three candidate genes—LOC_Os02g56760, LOC_Os05g34380, LOC_Os05g34600—were found possibly be significantly rice. Haplotype analysis indicated that LOC_Os05g34380 highly ratio, LOC_Os05g34600 length, LOC_Os02g56760 width. Our results provide important genetic information molecular improvement shape, laying foundation further cloning molecular-assisted breeding genes.