中国农业科技导报 ›› 2025, Vol. 27 ›› Issue (6): 83-92.DOI: 10.13304/j.nykjdb.2023.0923

• 生物技术 生命科学 • 上一篇    下一篇

塔宾曲霉的鉴定及基因编辑方法对其同源重组效率的影响

梁丽存1(), 于会民1, 管晓晨2, 黄火清1, 姚斌1, 杨浩萌1()   

  1. 1.中国农业科学院北京畜牧兽医研究所,北京 100193
    2.甘南县质量技术监督检验检测中心,黑龙江 齐齐哈尔 162199
  • 收稿日期:2023-12-15 接受日期:2024-03-05 出版日期:2025-06-15 发布日期:2025-06-23
  • 通讯作者: 杨浩萌
  • 作者简介:梁丽存 E-mail:lianglicun1022@163.com
  • 基金资助:
    国家重点研发计划项目(2021YFC2100204);国家肉鸡产业技术体系建设专项(CARS-41)

Identification of Aspergillus tubingensis and the Effect of Gene Editing Methods on Its Homologous Recombination Efficiency

Licun LIANG1(), Huimin YU1, Xiaochen GUAN2, Huoqing HUANG1, Bin YAO1, Haomeng YANG1()   

  1. 1.Institute of Animal Sciences,Chinese Academy of Agricultural Sciences,Beijing 100193,China
    2.Gannan County Quality and Technical Supervision Inspection and Testing Center,Heilongjiang Qiqihar 162199,China
  • Received:2023-12-15 Accepted:2024-03-05 Online:2025-06-15 Published:2025-06-23
  • Contact: Haomeng YANG

摘要:

塔宾曲霉是一种丝状真菌,在饲料、食品、生物防治、环境修复等领域都有广泛的应用前景。通过形态学观察结合分子检测和Ehrlich试剂染色法,成功地鉴定了1株塔宾曲霉,将其命名为F316。为探索适合F316的基因编辑方法,便于基因工程改造,应用CRISPR/Cas9系统,在F316的孢子色素合成相关基因fwnA的内部插入潮霉素抗性基因,通过孢子颜色统计和抗性基因PCR验证,比较不同基因编辑元件的递送方式对同源重组效率的影响。结果表明,在F316菌株中,表达盒法、自主复制质粒法和核糖核蛋白复合体法3种不同递送方式的同源重组效率分别为70.14%、66.67%和25.70%;另外,供体DNA中同源臂的长度对同源重组效率也有影响,当同源臂长度为2 000 bp时,重组效率最好。

关键词: 塔宾曲霉, 菌种鉴定, 基因编辑, 同源重组

Abstract:

Aspergillus tubingensis is a filamentous fungus with broad application prospects in feed, food, biological control, environmental restoration and so on. Combining morphological observation with molecular detection, Ehrlich reagent staining, a strain of Aspergillus tubingensis was successfully identified and was named as F316. In order to explore a suitable gene editing method for F316 and facilitate genetic engineering modification, CRISPR/Cas9 was applied to insert hygromycin resistance genes into the spore pigment synthesis related gene fwnA. Through spore color statistics and resistance gene PCR verification, the effects of different delivery methods of Cas9 and gRNA on homologous recombination efficiency were compared. The results showed that, for F316 strain, the homologous recombination efficiency of expression cassette method, self-replicating plasmid method and ribonucleoprotein complex (RNP) method were 70.14%, 66.67% and 25.70%, respectively. In addition, the length of homologous arms in donor DNA also affected the homologous recombination efficiency. When the length of homologous arms was 2 000 bp, the recombination efficiency was the best.

Key words: Aspergillus tubingensis, strain identification, gene editing, homologous recombination

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