Gene Details:

• MSU gene ID: LOC_Os09g35980
• RAPdb gene ID: Os09g0529300
• Gene Symbol: TAC1
• Genome: MSU7 ,  IRGSP-1.0
• Species: Oryza sativa

Functional Descriptions:

• OsPIN2-over-expressing plants had suppressed the expression of a gravitropism-related gene OsLazy1 in the shoots, but unaltered expression of OsPIN1b and OsTAC1, which were reported as tiller angle controllers in rice.
• TAC1 was mapped to a 35-kb region on chromosome 9 using a large F(2) population from crosses between an indica rice, IR24, which displays a relatively spread-out plant architecture, and an introgressed line, IL55, derived from japonica rice Asominori, which displays a compact plant architecture with extremely erect tillers.
• The data suggest that OsPIN2 has a distinct auxin-dependent regulation pathway together with OsPIN1b and OsTAC1 controlling rice shoot architecture.
• Our previous work identified Tiller Angle Control 1 (TAC1) as a major quantitative trait locus that controls rice tiller angle.
• 5-kb intron from ‘AGGA’ to ‘GGGA’ decreases the level of TAC1, resulting in a compact plant architecture with a tiller angle close to zero.
• 00112, respectively, further indicate that TAC1 has been highly conserved during the course of rice domestication.
• A phylogenetic tree derived from TAC1 sequence analysis suggests that the indica and japonica subspecies arose independently during the domestication of wild rice.
• This research demonstrates that tiller angle is controlled by a major quantitative trait locus, TAC1 (Tiller Angle Control 1).
• TAC1, a major quantitative trait locus controlling tiller angle in rice.
• Our results reveal that TAC1 is necessary for the dynamic changes in plant architecture, which can guide improvements in plant architecture during the modern super rice breeding.
• Moreover, TAC1 positively regulates loose plant architecture, and high TAC1 expression cannot influence the expression of tested tiller-angle-related genes.

Function-related keywords:

• tiller ,  erect ,  shoot ,  architecture ,  tiller-angle ,  shoot-architecture ,  auxin ,  domestication ,  breeding ,  plant-architecture

Literature:

• Molecular evolution of the TAC1 gene from rice (Oryza sativa L.) .  DOI:  10.1016/j.jgg.2012.07.011 ;  PMID:  23089365
• TAC1, a major quantitative trait locus controlling tiller angle in rice .  DOI:  10.1111/j.1365-313X.2007.03284.x ;  PMID:  17908158
• Over-expression of OsPIN2 leads to increased tiller numbers, angle and shorter plant height through suppression of OsLAZY1 .  DOI:  10.1111/j.1467-7652.2011.00637.x ;  PMID:  21777365
• Tiller Angle Control 1 Is Essential for the Dynamic Changes in Plant Architecture in Rice .  DOI:  10.3390/ijms23094997 ;  PMID:  35563391

Related News:

Gene Resources:

• NCBI ID:
• UniProt accessions:

Sequences: