%0 Journal Article
%T Identification of a novel tillering dwarf mutant and fine mapping of the TDDL(T) gene in rice (Oryza sativa L.)<br>
%A ZhenYu Gao
%A XiaoHui Liu
%A LongBiao Guo
%A Jian Liu
%A GuoJun Dong
%A Jiang Hu
%A Bin Han
%A Qian Qian
%A <br>
%J 科学通报(英文版)
%D 2009
%I 
%X 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. Supported by National Natural Science Foundation of China (Grant Nos. 30400255, 30623006), and National High Technology Research and Development Program of China (Grant Nos. 2006AA10A102, 2006AA10Z1B5)
%K rice (Oryza sativa L
%K )
%K tillering dwarf
%K plant architecture
%K TDDL(T) gene
%K fine mapping
%K GA<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=01BA20E8BA813E1908F3698710BBFEFEE816345F465FEBA5&cid=96E6E851B5104576C2DD9FC1FBCB69EF&jid=DD6615BC9D2CFCE0B6F945E8D5314523&aid=549925738080BEFE3CEC101396AA7356&yid=DE12191FBD62783C&vid=318E4CC20AED4940&iid=59906B3B2830C2C5&sid=95AF3D35E2988FF4&eid=1A12D34D3633DCF5&journal_id=1001-6538&journal_name=科学通报(英文版)&referenced_num=0&reference_num=29