‘京枣39’叶片遗传转化体系的建立
作者:
作者单位:

1.林木遗传育种全国重点实验室/林木育种与生态修复国家工程研究中心/北京林业大学生物科学与技术学院,北京 100083;2.内蒙古自治区赤峰市敖汉旗双井林场,赤峰 024300

作者简介:

马灵,E-mail:lingmaml@163.com

通讯作者:

庞晓明,E-mail:xmpang@163.com

中图分类号:

S665.1

基金项目:

国家重点研发计划项目(2022YFD2200404);国家自然科学基金项目(32271925)


Establishment of genetic transformation system for leaves of ‘Jingzao 39’(Ziziphus jujuba Mill.)
Author:
Affiliation:

1.State Key Laboratory of Tree Genetics and Breeding/National Engineering Research Center of Tree Breeding and Ecological Restoration/College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, China;2.Shuangjing Forestry Farm, Aohan Banner, Inner Mongolia Autonomous Region, Chifeng 024300, China

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    摘要:

    为建立‘京枣39’高效遗传转化体系,以‘京枣39’叶片为外植体进行遗传转化,探究卡那霉素(kanamycin,Kan)质量浓度、头孢噻肟(cefotaxime, Cef)和特美汀(timentin, Tim)抑菌质量浓度、预培养时间、不同菌液浓度、侵染时间、乙酰丁香酮(acetosyringone, AS)浓度及共培养时间对‘京枣39’叶片转化率的影响。结果显示,‘京枣39’叶片最佳遗传转化条件为,5 mg/L Kan选择压,50 mg/L Cef、250 mg/L Tim抑菌质量浓度,预培养4 d,农杆菌菌液OD600 nm值为0.6,侵染时间20 min,共培养基添加200 μmol/L AS,共培养4 d。荧光检测和PCR试验证实外源目的基因已成功整合到‘京枣39’基因组中,实现了农杆菌介导的‘京枣39’叶片的遗传转化。

    Abstract:

    Leaves of ‘Jingzao 39’were used as explants to establish an efficient genetic transformation system for ‘Jingzao 39’. The effects of the selection pressure of kanamycin (Kan), the inhibitory concentration of cefotaxime (Cef) and timentin (Tim), pre-culture time, the density of bacterial suspension, infection duration, the concentration and co-culture time of acetylyringone (AS) on the transformation rate of leaves of ‘Jingzao 39’ were studied. The results showed that the optimal genetic transformation conditions for the leaves of ‘Jingzao 39’ were as follows: 5 mg/L Kan, 50 mg/L Cef, 250 mg/L Tim, pre-culture for 4 days, Agrobacterium tumefaciens concentration OD600 nm=0.6, infection duration of 20 minutes, 200 μmol/L AS, co-culture for 4 days. The results of fluorescence detection and PCR analyses confirmed that the exogenous target gene was successfully integrated into the genome of ‘Jingzao 39’, achieving the Agrobacterium mediated genetic transformation of leaves of ‘Jingzao 39’. It will provide an important support for analyzing the function of genes and molecular breeding in jujube.

    图1 pYBA1132质粒图谱Fig.1 Map of pYBA1132 plasmid
    图2 ‘京枣39’叶片在不同质量浓度Kan培养基上的生长情况Fig.2 Growth of leaf explants of ‘Jingzao 39’ on Kan medium with different concentrations
    图3 不同因素对‘京枣39’叶片转化率的影响Fig.3 Effect of different factors on leaf transformation rate of ‘Jingzao 39’
    图4 阳性芽的GFP荧光信号鉴定Fig.4 GFP fluorescence signal identification of positive buds
    图5 阳性植株鉴定Fig.5 Detection of positive buds
    图6 ‘京枣39’叶片转化体系流程Fig.6 Leaf transformation system for ‘Jingzao 39’
    表 1 不同质量浓度Cef、Tim处理下‘京枣39’叶片再生率Table 1 Leaf regeneration rate of ‘Jingzao 39’ under different concentrations of Cef and Tim
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马灵,袁轶,杨爽,高艺,陈学勋,焦立军,刘巍巍,薄文浩,庞晓明.‘京枣39’叶片遗传转化体系的建立[J].华中农业大学学报,2025,44(1):43-49

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  • 收稿日期:2024-04-12
  • 在线发布日期: 2025-03-03
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