华北农学报 ›› 2008, Vol. 23 ›› Issue (5): 6-12. doi: 10.7668/hbnxb.2008.05.002

所属专题: 生物技术

• 论文 • 上一篇    下一篇

载有抗逆性基因的多枝赖草染色体连锁群的特定TAC克隆的鉴定

张艳1,2, 赵茂林2, 孙淼1,2, 徐粤宇3   

  1. 1. 首都师范大学, 生命科学学院, 北京, 100037;
    2. 北京市农林科学院, 农业生物技术研究中心, 北京, 100097;
    3. 湖南工程学院, 湖南, 湘潭, 411104
  • 收稿日期:2008-04-10 出版日期:2008-10-28
  • 通讯作者: 赵茂林(1965-),男,山西原平人,研究员,研究生导师,主要从事植物分子细胞遗传学与育种学方面的研究。
  • 作者简介:张艳(1983-),女,山东潍坊人,在读硕士,主要从事分子与细胞遗传学方面的研究。
  • 基金资助:
    国家自然科学基金(30370905,30571135);北京市自然科学基金(5032009)

Identification of the Transformation-competent Artificial Chromosome(TAC)Clones Specific to the Linkage Group of Chromosomes Containing Stress-tolerant Genes ofLeymus multicaulis

ZHANG Yan1,2, ZHAO Mao-lin2, SUN Miao1,2, XU Yue-yu3   

  1. 1. Capital Normal University, Beijing 100037, China;
    2. Beijing Academy of Agriculture and Forestry Science, Beijing 100097, China;
    3. Hunan Institute of Engineering, Xiangtan 411104, China
  • Received:2008-04-10 Published:2008-10-28

摘要: 分别以耐黄矮病耐蚜虫小赖麦附加系Line24、耐盐耐旱小赖麦附加系Line15、耐盐小赖麦易位附加系Line14为材料,以它们各自所附加的含有相应抗逆基因的多枝赖草染色体(简称为抗逆染色体)的6个特定SSR分子标记为探针,通过两轮菌落杂交法筛选多枝赖草基因组可转化人工染色体(TAC)文库,最终得到经过验证的阳性克隆个,它们分别对应于3个(易位)附加系中所附加抗逆染色体(臂)连锁群的6个特定SSR标记,每一标记所对应的TAC克隆数目变化在5~19个,平均约13个。进一步从来自Line24的抗逆染色体连锁群的同一个探针筛选到的阳性克隆中抽查2个TAC克隆15J18和09I02,通过双色荧光原位杂交技术(Double-color FISH)进行初步定位,直观地证明了文库筛选结果的准确性。为各条抗逆染色体的识别鉴定和相关抗逆基因的精细定位奠定了基础。

关键词: 多枝赖草, TAC克隆, 二体(易位)附加系, 抗逆性, 双色荧光原位杂交

Abstract: Leymus multicaulis(2n=4X=28,XmXmNsNs)is one of benefit native grass species in Xinjiang,which has many excellent traits such as immune or highly resistant to BYDV(Barley yellow dwarf virus),and highly tolerant to salt,drought,leanness,pollution,aphids and so on.So it is very important to isolate and clone genes controlling these traits inLeymus multicaulis.In this research,the transformation-competent artificial chromosome(TAC)genomic libraries ofLeymus multicauliswere screened through the method of colony blot hybridization in two steps with the probes of specific SSR molecular markers from stress-tolerance chromosomes,which contained stress-tolerant genes of Leymus multi-caulis respectively added to wheat alien disomic addition line.Line 24,tolerant to BYDV and aphids;Line 15,tolerant to salt and drought,and wheat alien disomic translocation-addition line;Line 14,tolerant to salt.As a result,a total of 77 positive clones respectively specific to six SSR markers from three stress tolerance chromosome linkage groups were identified.The accuracy of the screening results was verified visually by physical localization of two TAC clones 15J18 and 09I02 from the positive clones specific to a SSR marker of the same linkage group using double-color fluorescent in situ hybridization(Double-color FISH).The research results will play a pivotal role in identifying individual stress tolerance chromosome ofLeymus multicaulisand constructing high-resolution physical map.

Key words: Leymus multicaulis, TAC clones, Disomic alien(translocation)addition line, Stress-tolerance, Double- color fluorescent in situ hybridization

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引用本文

张艳, 赵茂林, 孙淼, 徐粤宇. 载有抗逆性基因的多枝赖草染色体连锁群的特定TAC克隆的鉴定[J]. 华北农学报, 2008, 23(5): 6-12. doi: 10.7668/hbnxb.2008.05.002.

ZHANG Yan, ZHAO Mao-lin, SUN Miao, XU Yue-yu. Identification of the Transformation-competent Artificial Chromosome(TAC)Clones Specific to the Linkage Group of Chromosomes Containing Stress-tolerant Genes ofLeymus multicaulis[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2008, 23(5): 6-12. doi: 10.7668/hbnxb.2008.05.002.

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