中国水稻科学

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红莲型杂交水稻红莲优6号及其亲本苗期与分蘖期根系基因表达差异分析

熊建华1,2; 陈学峰2; 张义平2; 朱英国2; 李阳生1,2,*;   

  1. 1 中国科学院 亚热带区域农业研究所, 湖南 长沙 410125; 2武汉大学 植物发育生物学教育部重点实验室, 湖北 武汉 430072; *通讯联系人, Email:lysh21cn@163.com)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2004-03-10 发布日期:2004-03-10

Differential Display on Gene Expression of Root System in Hybrid Rice Honglianyou 6 and Its Parental Lines at Seedling and Tillering Stages

XIONG Jian-hua 1; 2; CHEN Xue-feng 2; ZHANG Yi-ping 2; ZHU Ying-guo 2; LI Yang-sheng 1; *   

  1. 1 Institute of Subtropical Agriculture; Chinese Academy of Sciences; Changsha 410125; China; 2Key Laboratory for Plant Developmental Biology; Ministry of Education; P. R. China; Wuhan University; Wuhan 430072; *Corresponding author; E mail: lysh21cn@163.com)
  • Received:1900-01-01 Revised:1900-01-01 Online:2004-03-10 Published:2004-03-10
  • Contact: LI Yang-sheng

摘要: 运用mRNA差异显示技术(DDRT-PCR)对红莲型杂交稻组合红莲优6号及其亲本(粤泰A、扬稻6号)、保持系(粤泰B)苗期、分蘖期根系的基因表达状况进行了分析。结果显示,不同发育时期之间差异表达基因远少于同一时期之间杂种与亲本差异表达基因,苗期和分蘖期差异表达基因数量相近,但同一差异表达类型基因的数量有较大变化,分蘖期杂种表达单亲基因增多;互补表达基因可能对红莲优6号杂种优势的形成起重要作用。MF1差异片段已通过Northern杂交验证;MF1片段克隆测序结果在GeneBank中进行同源序列查对,发现是新的cDNA序列。

关键词: 根系, 基因表达, mRNA差异显示, 杂种优势

Abstract: The gene expression in root system for hybrid rice, Honglianyou 6, and its parental lines (Yuetai A, Yuetai B, Yangdao 6) at seedling and tillering stages was analyzed by DDRT PCR. Results revealed that differentially expressed genes between seedling stage and tillering stage were far less than those between hybrid and its parental lines at the same developmental stage, both differences in gene expression were detected; the number of the differentially expressed genes at tillering stage was close to that at seedling stage, while the gene number of the same differential expressed patterns was obviously different. The expressed genes in hybrid rice from one parent increased at tillering stage; heterosis in Honglianyou 6 probably owed to the complementary expression of gene. Blasting of MF1 after sequencing in GeneBank revealed that it was a new cDNA sequences. The fragment MF1 was confirmed through Northern blotting analysis.

Key words: root system, gene expression, mRNA differential display, heterosis