Identification of a novel tillering dwarf mutant and fine mapping of the TDDL(T) gene in rice (Oryza sativa L.)
文献类型: 外文期刊
第一作者: Gao ZhenYu
作者: Gao ZhenYu;Guo LongBiao;Liu Jian;Dong GuoJun;Hu Jiang;Qian Qian;Gao ZhenYu;Liu XiaoHui;Han Bin
作者机构:
关键词: rice (Oryza sativa L.);tillering dwarf;plant architecture;TDDL(T) gene;fine mapping;GA
期刊名称:CHINESE SCIENCE BULLETIN ( 影响因子:1.649; 五年影响因子:1.738 )
ISSN: 1001-6538
年卷期: 2009 年 54 卷 12 期
页码:
收录情况: SCI
摘要: Rice plant architecture is an important agronomic trait that affects the grain yield. To understand the molecular mechanism that controls plant architecture, a tillering dwarf mutant with darker-green leaves derived from an indica cultivar IR64 treated with EMS is characterized. The mutant, designated as tddl(t), is nonallelic to the known tillering dwarf mutants. It is controlled by one recessive nuclear gene, TDDL(T), and grouped into the dn-type dwarfism according to Takeda's definition. The dwarfism of the mutant is independent of gibberellic acid based on the analyses of two GA-mediated processes. The independence of brassinosteroid (BR) and naphthal-3-acetic acid (NAA) of the tddl(t) mutant, together with the decreased size of parenchyma cells in the vascular bundle, indicates that the TDDL(T) gene might participate in another hormone pathway. TDDL(T) is fine mapped within an 85.51 kb region on the long arm of rice chromosome 4, where 20 ORFs are predicted by RiceGAAS (http://ricegaas.dna.affrc. go.jp/rgadb/). Further cloning of TDDL(T) will benefit both marker assisted selection (MAS) of plant architecture and dissection of the molecular mechanism underlying tillering dwarf in rice.
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