Analysis of the Signaling Pathway Regulated by the Rice Mutant Gene DHD9 in Controlling Heading Date

Key Points

• The study aims to explore the role of the DHD9 gene in regulating the heading date and its impact on rice yield.
• Utilized delayed heading date 9 (dhd9) rice mutant and wild type (WT) for analysis.
• Examined phenotypic changes and expression levels of key genes related to heading date.
• Assessed interactions between DHD9 and biological clock systems.
• DHD9 mutant exhibited a delayed heading date by approximately 9 days under natural conditions and 26 days under short-day conditions.
• Mutant showed significant increases in plant height, panicle length, and grains per panicle compared to WT.
• Gene expression analysis revealed downregulation of Ehd1-Hd3a/RFT1 pathway genes in dhd9 compared to WT, affecting heading date control.

Abstract