Research Papers

Fine Mapping of a Rolled Leaf Gene rl(t)    in Rice

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  • 1 Key Laboratory of Crop Genetics and Physiology of Jiangsu Province / Key Laboratory of Plant Functional Genomics of Ministry of Education, Yangzhou University, Yangzhou 225009, China; 2 Lixiahe Agricultural Research Institute of Jiangsu Province/Nanjing Subcenter of National Rice Improvement Center, Yangzhou 225007, China; 3 Biochemical Engineering Department, Yangzhou Polytechnic College, Yangzhou 225009, China;

Received date: 2010-10-26

  Revised date: 2010-11-25

  Online published: 2011-09-10

Abstract

Moderately  rolled  leaf   is  one of the  most important morphological characters in ideal plant architecture breeding in rice. The heterozygous   rl(t) gene   could produce moderately rolled leaf and   increase rice yield, presenting a high breeding potential.  By using  BC5F3  and BC5F4 populations derived from   a rolled  leaf Zhenshan 97B(carrying rl(t) gene) and  a flatleaf  variety Qimiaoxiang(recurrent parent),  and a total of 15 polymorphic markers, the rl(t) gene was ultimately mapped into a region of 11 kb flanked by the markers P95053 and P113.6  on chromosome 2. The genetic  distance of  this region is about 0.04 cM. Only one predicated ORF (open reading frame)/gene was  found in this region, which encodes  a transcription factor of  the homeobox family HDGL2 (also known as HDZIP Ⅳ). The results laid a   foundation for further cloning  of rl(t)and understanding of  its regulation mechanism.

Cite this article

PAN Cun-hong1, 2, #, LI Lei1, #, CHEN Zong-xiang1, XUE Xiang1, ZHANG Ya-fang1, ZUO Shi-min1, DAI Zheng-yuan2, PAN Xue-biao1,*, MA Yu-yin1, 3,* . Fine Mapping of a Rolled Leaf Gene rl(t)    in Rice[J]. Chinese Journal OF Rice Science, 2011 , 25(5) : 455 -460 . DOI: 10.3969/j.issn.10017216.2011.05.001

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