Identifying QTLs Related to Grain Filling Using a Doubled Haploid Rice (Oryza sativa L.) Population

Grain filling is an important trait of rice that affects the yield grain-oriented crop species with sink capacity-related traits. Here, we used a doubled haploid (DH) population derived from cross between 93-11 (P1, indica) and Milyang352 (P2, japonica) to investigate quantitative traits loci (QTLs) controlling grain in employing Kompetitive allele-specific PCR (KASP) markers. The mapping was grown under early-, normal-, late-cultivation periods. phenotypic evaluation revealed spikelet number per panicle positively correlated grain-filling ratio early cultivation conditions. Notably, three significant QTLs associated control filling, qFG3, qFG5-1, qFG5-2, were identified. Genes harbored by these are linked diverse biological processes molecular functions. Likewise, genes abiotic stress response transcription factor activity redox homeostasis detected. such as MYB, WRKY60, OsSh1 encoding factor, β-catenin, tubulin FtsZ, well those cytochrome P450, would play forefront role Our results suggest qFG3-related could mediate transition mechanisms. Fine-mapping help identify putative candidate for downstream functional characterization.