生物技术通报 ›› 2023, Vol. 39 ›› Issue (3): 101-115.doi: 10.13560/j.cnki.biotech.bull.1985.2022-0851

• 技术与方法 • 上一篇    下一篇

葱鳞葡萄孢菌诱导下韭菜RT-qPCR内参基因的筛选和验证

宋海娜1(), 吴心桐1, 杨鲁豫1, 耿喜宁1, 张华敏2(), 宋小龙3   

  1. 1.平顶山学院化学与环境工程学院 河南省生态经济型木本植物种质创新与利用重点实验室,平顶山 467000
    2.河南城建学院生命科学与工程学院,平顶山 467036
    3.河南科技大学化工与制药学院,洛阳 471000
  • 收稿日期:2022-07-10 出版日期:2023-03-26 发布日期:2023-04-10
  • 通讯作者: 张华敏,男,博士,讲师,研究方向:植物遗传与分子育种;E-mail: hmzhang111@126.com
  • 作者简介:宋海娜,女,博士,讲师,研究方向:植物分子育种;E-mail: shn1126@126.com
  • 基金资助:
    国家自然科学基金青年项目(31401463);河南省重点研发与推广专项(科技攻关)项目(222102110071);平顶山学院博士科研启动项目(PXY-BSQD-202109);河南城建学院博士科研启动项目(K-Q2021010)

Selection and Validation of Reference Genes for RT-qPCR in Allium tuberosum Infected by Botrytis squamosa

SONG Hai-na1(), WU Xin-tong1, YANG Lu-yu1, GENG Xi-ning1, ZHANG Hua-min2(), SONG Xiao-long3   

  1. 1. School of Chemical and Environmental Engineering, Pingdingshan University, Henan Key Laboratory of Germplasm Innovation and Utilization of Eco-economic Woody Plant, Pingdingshan 467000
    2. College of Life Sciences and Engineering, Henan University of Urban Construction, Pingdingshan 467036
    3. School of Chemical Engineer & Pharmacy, Henan University of Science and Technology, Luoyang 471000
  • Received:2022-07-10 Published:2023-03-26 Online:2023-04-10

摘要:

葱鳞葡萄胞菌引起的韭菜灰霉病是影响韭菜产量和品质的主要因素之一。为了筛选出感染灰霉病后韭菜叶片中稳定表达的内参基因用于基因定量表达分析,以模拟接种和接种葱鳞葡萄孢菌24、48、72 h的韭菜叶片为材料,基于前期的转录组测序结果选取 UBC1UBC2UBQ1UBQ2GAPDH3GAPDH4TUBEF-1α、40S RPDDXeIF-1APABPDnaJ共13个基因为候选内参基因,利用实时荧光定量PCR(RT-qPCR)技术检测13个基因的表达情况,采用geNorm、NormFinder、BestKeeper软件和Reffinder在线程序对候选内参基因的表达稳定性进行评估。结果表明,13个候选内参基因中UBQ1的Ct值变化范围最小,表达水平最稳定。GeNorm、NormFinder和BestKeeper 软件筛选出的最佳内参基因不同,RefFinder综合评估显示,UBC2UBQ1是韭菜叶片接种葱鳞葡萄孢菌后表达稳定性较好的基因,DDX是稳定性较差的基因。为了验证所筛选内参基因的可靠性,选择6个稳定性不同的候选内参基因分别作为定量分析的内部参照,对接种葱鳞葡萄孢菌后不同时间韭菜叶片中GST676PRP902基因的表达水平进行归一化处理。结果显示,以稳定性较高的UBC2UBQ1为内参基因时,校正的GST676PRP902基因的表达趋势与转录组测序结果一致,而以稳定性相对较差的40S RPeIF-1AGAPDH4DDX为内参基因时,校正的目的基因的表达趋势与转录组测序结果稍有差异。软件分析和实验验证结果表明,UBC2UBQ1基因可作为葱鳞葡萄孢菌侵染韭菜叶片后相关基因定量表达分析的最合适内参基因。研究结果为后续开展韭菜抗灰霉病关键基因表达分析和功能研究奠定了基础。

关键词: 韭菜, 葱鳞葡萄孢菌, 内参基因, 实时荧光定量PCR, 表达稳定性, 灰霉病

Abstract:

Chinese chive gray mold caused by Botrytis squamosa is one of the major factors affecting the production and quality of Chinese chive(Allium tuberosum). In order to screen stable reference genes in Chinese chive leaves infected with gray mold for quantitative gene expression analysis, Chinese chive leaves mock-inoculated and inoculated with B. squamosa for 24, 48 and 72 h were taken as materials. Thirteen genes including UBC1, UBC2, UBQ1, UBQ2, GAPDH3, GAPDH4, TUB, EF-1α, 40S RP, DDX, eIF-1A, PABP and DnaJ were selected as candidate reference genes based on previous RNA-Seq data of Chinese chive. The expressions of the candidate reference genes were detected by real-time quantitative PCR(RT-qPCR)and evaluated by geNorm, NormFinder, BestKeeper and RefFinder statistical algorithms. The results showed that among the thirteen candidate reference genes, UBQ1 had the smallest variation range of Ct value and the most stable expression. The most suitable reference genes evaluated by geNorm, NormFinder and BestKeeper software were different. Comprehensive evaluation of RefFinder website showed that UBC2 and UBQ1 had the better stability in Chinese chive leaves after inoculation with B. squamosa, and DDX displayed the lower stability. In order to verify the reliability of the selected reference genes, six candidate genes with different stability were used as internal controls for quantitative analysis, and normalized the expression levels of GST676 and PRP902 in Chinese chive leaves at different time points after inoculation with B. squamosa. The expression trends of GST676 and PRP902 corrected by UBC2 or UBQ1 with fine stability were consistent with that in RNA-Seq data, while the expression trends of GST676 and PRP902 corrected by 40S RP, eIF-1A, GAPDH4 or DDX with relative poor stability had some difference with that in RNA-Seq data. These results of software analysis and experimental verification showed that UBC2 and UBQ1 were the most suitable reference genes in Chinese chive leaves infected by B. squamosa for quantitative expression analysis. The results lay the foundation for future research on the expression and function of key genes in Chinese chives leaves during infection with B. squamosa.

Key words: Allium tuberosum, Botrytis squamosa, reference gene, real-time quantitative PCR, expression stability, gray mold