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作物学报 ›› 2017, Vol. 43 ›› Issue (10): 1426-1433.doi: 10.3724/SP.J.1006.2017.01426

• 作物遗传育种·种质资源·分子遗传学 • 上一篇    下一篇

一个水稻温敏黄化突变体的表型分析和基因定位

张天雨1,周春雷1,刘喜1,孙爱伶1,曹鹏辉1,Thanhliem NGUYEN1,田云录1,翟虎渠1,2,江玲1,*   

  1. 本研究由国家重点研发项目(2016YFD0100101-08),江苏省科技支撑计划项目(BE2015363)和安徽省科技重大专项(16030701068)资助。
  • 收稿日期:2017-03-02 修回日期:2017-05-10 出版日期:2017-10-12 网络出版日期:2017-05-23
  • 通讯作者: Jing Ling, E-mail:jiangling@njau.edu.cn
  • 基金资助:

    本研究由国家重点研发项目(2016YFD0100101-08),江苏省科技支撑计划项目(BE2015363)和安徽省科技重大专项(16030701068)资助。

Phenotypes and Gene Mapping of a Thermo-sensitive Yellow Leaf Mutant of Rice

ZHANG Tian-Yu1,ZHOU Chun-Lei1,LIU Xi1,SUN Ai-Ling1,CAO Peng-Hui1,Thanhliem NGUYEN1, TIAN Yun-Lu1,ZHAI Hu-Qu1,2,JIANG Ling1,*   

  1. This study was supported by the National Key Research and Development Program of China (2016YFD0100101-08), theScience and Technology Support Project of Jiangsu Province(BE2015363), and the Science and Technology Major Projects(16030701068).
  • Received:2017-03-02 Revised:2017-05-10 Published:2017-10-12 Published online:2017-05-23
  • Contact: Jing Ling, E-mail:jiangling@njau.edu.cn
  • Supported by:

    This study was supported by the National Key Research and Development Program of China (2016YFD0100101-08), theScience and Technology Support Project of Jiangsu Province(BE2015363), and the Science and Technology Major Projects(16030701068).

摘要:

对水稻叶色进行表型分析与基因定位,可为图位克隆该类基因和研究水稻光合系统功能奠定基础。利用甲基磺酸乙酯(Ethylmethylsulfone,EMS)诱变的方法,从籼稻品种“南京11”(简称NJ11)中获得温敏黄化突变体dy1;与野生型相比,dy1在自然环境下,从苗期至成熟期始终表现叶片黄化,透射电镜显示dy1类囊体结构异常;同时株高、分蘖数、结实率等农艺性状也表现出极显著的差异;实验室光照培养箱条件下,dy1苗期在20℃下表现白化,在25℃表现黄化,在30℃下为浅绿的表型;遗传分析表明水稻温敏黄化突变体dy1的表型是由1对隐性基因控制;将突变体与粳稻广亲和品种‘02428’杂交,构建F2群体,从中选出隐性极端个体,通过基因定位,将控制黄化的基因限定在第1染色体长臂上标记Y-4和Y-35之间的115 kb的区间内,含有16个开放阅读框(ORF),测序发现,dy1中编码尿嘧啶核苷酸激酶的基因LOC_Os01g73450的第4个内含子与第5个外显子交界处存在单碱基替换,拟作为候选基因;且叶绿体合成相关基因表达量显著降低,猜测该基因可能参与了叶绿素合成途径。

关键词: 水稻, 温度敏感型, 遗传分析, 叶色, 基因定位

Abstract:

Phenotypic analysis and gene mapping of rice leaf color could lay a foundation for map-based cloning of related genes and the function research of rice photosynthetic system. Leaf yellow mutant dy1 was obtained from rice cultivar “Nanjing 11”(abbreviated as NJ11) mutated by ethyl methanesulfonate (EMS). The mutant dy1 showed leaf yellowing at seedling stage and maturity stage in natural environment, with an abnormal structure of thylakoids under TEM, and significant differences in plant height, tiller number, seed setting rate and so on. The mutant dy1 showed albinism in 20°C,etiolation in 25°C andvirescence in 30°C.The rice leaf yellow mutant dy1 was controlled by a single recessive gene. F2 population was constructed by crossing the mutant with “02428”, and the mutant phenotypesof extreme individualswere selected to map gene dy1. The gene was located in the 115 kb region of the long arm of chromosome 1, and contained 16 ORFs. Sequencing analysis showed that LOC_Os01g73450controlling a uracil nucleotidekinase, with a single base substitution in the junction of the fourth intron and the fifth exon in dy1, might be a candidate gene.And the expression of genes relatedto chloroplast synthesis was significantly decreased, indicatingdy1 may involve in the chloroplast synthesis

Key words: Rice, Thermo-sensitive, Genetic analysis, Leaf color, Gene mapping

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