华北农学报 ›› 2010, Vol. 25 ›› Issue (4): 92-96. doi: 10.7668/hbnxb.2010.04.020

所属专题: 玉米

• 论文 • 上一篇    下一篇

利用正义RNAi技术提高玉米直链淀粉含量效果的研究

张桂堂1,2, 卢东长城1,2, 孙重霞1,2, 梁荣奇3, 杨凤萍2, 张晓东2   

  1. 1. 首都师范大学生命科学学院, 北京 100048;
    2. 北京市农林科学院北京农业生物技术研究中心, 北京 100097;
    3. 中国农业大学农学与生物技术学院农业部作物基因组学与遗传改良重点开放实验室,北京市作物遗传改良重点实验室, 北京 100193
  • 收稿日期:2009-07-22 出版日期:2010-08-28
  • 通讯作者: 梁荣奇(1970- ),男,山东莒县人,副教授,博士,主要从事小麦遗传育种研究。
  • 作者简介:张桂堂(1984- ),男,山东人,在读硕士,主要从事作物遗传育种研究.
  • 基金资助:
    北京市农林科学院优秀青年科研基金(2006-16)

Increasing of Maize Amylose Content by Sense RNA Interference

ZHANG Gui-tang1,2, LU Dong-chang-cheng1,2, SUN Chong-xia1,2, LIANG Rong-qi3, YANG Feng-ping2, ZHANG Xiao-dong2   

  1. 1. College of Life Science, Capital Normal University, Beijing 100048, China;
    2. Beijing Agrobiotechnology Research Center, Beijing Academy of Agriculture and Forestry Science, Beijing 100097, China;
    3. Key Lab of Crop Genomics & Genetic Improvement, Beijing Key Lab of Crop Genetic Improvement, College of Agronomy and Biotechnology, China Agricμltural University, Beijing 100193, China
  • Received:2009-07-22 Published:2010-08-28

摘要: 为了研究利用正义RNAi技术提高玉米直链淀粉含量效果,用基因枪法将构建的sbeⅡb正义RNAi表达载体pBAC06和pBAC08(筛选标记基因分别为3S启动子及Adh1-intron1增强驱动的epsps和bar)导入玉米(Zea mays)自交系幼胚愈伤组织,经过筛选、分化和再生获得了44株转基因当代植株,经PCR扩增、PCR-Southern检测有30株为阳性.选择9株健壮的阳性植株进行基因组Southern-blotting分析,结果表明7株T0植株整合了目的基因,其中4株整合了1个转基因拷贝,2株整合了2个转基因拷贝,1株整合了3个转基因拷贝.这7株中有2株结实,直链淀粉含量分别为23.22%和24.60%,有一定的小幅提高.下一步要进行较大规模的基因枪转化,得到比较大的转基因群体,以对更多转基因后代进行鉴定,期望筛选出外源基因多拷贝插入和直链淀粉含量大幅提高的株系.

关键词: 玉米, 淀粉分支酶, 正义RNAi, 直链淀粉

Abstract: In order to explore the effect of sense RNAi (RNA interference) on increase the amylose content of maize (Zea mays) ,two sense-RNAi vectors pBAC506 and pBAC508 with the sense sbeⅡb and selection gene epsps or bar were constructed and transformed to maize callus induced from immature embryos of the elite inbred lines by biolistic PDS1000 /He. Forty-four T0 transformed plantlets were regenerated,and thirty plants were positive by analysis of PCR and PCR-Southern hybridization. Southern-blotting results of 9 strong PCR-positive plants showed that the RNAi constructs in 7 plants were successful integrated into their genomes,4 with one copy of transgene,2 with two copies and 1 with three copies. The amylose content of 2 T2 transgenic lines were 23. 22% and 24. 60%,respectively. The results suggested that a big transgenic population was necessary for screening the transgenic plants with multi-copy transgene and high amylose content.

Key words: Maize, Starch branching enzyme, Sense-RNAi, Amylose

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引用本文

张桂堂, 卢东长城, 孙重霞, 梁荣奇, 杨凤萍, 张晓东. 利用正义RNAi技术提高玉米直链淀粉含量效果的研究[J]. 华北农学报, 2010, 25(4): 92-96. doi: 10.7668/hbnxb.2010.04.020.

ZHANG Gui-tang, LU Dong-chang-cheng, SUN Chong-xia, LIANG Rong-qi, YANG Feng-ping, ZHANG Xiao-dong. Increasing of Maize Amylose Content by Sense RNA Interference[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2010, 25(4): 92-96. doi: 10.7668/hbnxb.2010.04.020.

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