RRC ID 21917
Author Yu B, Lin Z, Li H, Li X, Li J, Wang Y, Zhang X, Zhu Z, Zhai W, Wang X, Xie D, Sun C.
Title TAC1, a major quantitative trait locus controlling tiller angle in rice.
Journal Plant J.
Abstract A critical step during rice (Oryza sativa) cultivation is dense planting: a wider tiller angle will increase leaf shade and decrease photosynthesis efficiency, whereas a narrower tiller angle makes for more efficient plant architecture. The molecular basis of tiller angle remains unknown. This research demonstrates that tiller angle is controlled by a major quantitative trait locus, TAC1 (Tiller Angle Control 1). 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. Genetic complementation further identified the TAC1 gene, which harbors three introns in its coding region and a fourth 1.5-kb intron in the 3'-untranslated region. A mutation in the 3'-splicing site of this 1.5-kb intron from 'AGGA' to 'GGGA' decreases the level of tac1, resulting in a compact plant architecture with a tiller angle close to zero. Further sequence verification of the mutation in the 3'-splicing site of the 1.5-kb intron revealed that the tac1 mutation 'GGGA' was present in 88 compact japonica rice accessions and TAC1 with 'AGGA' was present in 21 wild rice accessions and 43 indica rice accessions, all with the spread-out form, indicating that tac1 had been extensively utilized in densely planted rice grown in high-latitude temperate areas and at high altitudes where japonica rice varieties are widely cultivated.
Volume 52(5)
Pages 891-8
Published 2007-12
DOI 10.1111/j.1365-313X.2007.03284.x
PMID 17908158
MeSH Amino Acid Sequence Base Sequence Chromosome Mapping Chromosomes, Plant Crosses, Genetic Expressed Sequence Tags Molecular Sequence Data Oryza / anatomy & histology Oryza / genetics* Oryza / growth & development Phenotype Plant Proteins / chemistry Plant Proteins / genetics* Plant Proteins / physiology Quantitative Trait Loci* RNA, Messenger / metabolism Sequence Alignment
IF 5.775
Times Cited 85