浙江农业学报

• 生物系统工程 • 上一篇    下一篇

草莓流式细胞检测提取方法的优化

  

  1. (杭州市农业科学研究院 生物技术研究所,浙江 杭州 310024)
  • 出版日期:2015-11-25 发布日期:2015-12-05

Optimization of extraction method for flow cytometry in strawberry

  1. (Institute of Biotechnology, Hangzhou Academy of Agricultural Sciences, Hangzhou 310024 China)
  • Online:2015-11-25 Published:2015-12-05

摘要: 为了制备高纯度的草莓细胞核悬液,提高流式细胞仪检测准确性,获得变异系数(CV值)小、可信度高的检测数据,为草莓倍性育种提供技术支持。通过优化过滤方法与OTTO提取液,应用流式细胞仪对二倍体川九1号和八倍体红颊草莓进行倍性检测。结果表明,较好的细胞核悬液过滤方法为先用70 μm过滤器,再用40 μm过滤器的二步过滤法;优化提取液配方为OTTOⅠ缓冲液:100 mmol·L-1柠檬酸,0.5%(V/V)Tween20和2%(V/V)聚乙烯吡咯烷酮(PVP), pH 2~3;OTTOⅡ缓冲液:400 mmol·L-1 Na2HPO4·12H2O, pH 8~9。用优化的提取方法制备的草莓细胞核悬液经流式细胞仪检测分析,其直方图主峰窄而集中、变异系数为5.43%。

关键词: 流式细胞仪, 草莓细胞核解离, 变异系数

Abstract: Strawberry nucleus suspension of high purity was essential in order to improve the accuracy of flow cytometry, to obtain reliable testing data with a small coefficient of variation (CV value) and to provide technical support for the strawberry ploidy breeding. Objective to find the optimal preparation method of strawberry nucleus suspension, polidy determinations of diploid Chuanjiu No.1 and octoploid Hongjia strawberries were conducted with flow cytometry using different filtration methods and OTTO extraction buffers. The results showed that the optimized filtration method was the two\|step filtration method (70 μm and 40 μm apertures). OTTO Ⅰ [100 mmol·L-1 citric acid, 0.5% (V/V) Tween20 and 2% (V/V) PVP, pH 2~3] and OTTO Ⅱ (400 mmol·L-1 Na2HPO4·12 H2O, pH 8~9) were found to be the optimal extraction buffers. Strawberry nucleus suspension prepared by the optimal method was analyzed by flow cytometry, and it showed a narrow, focused histogram with a small CV value of 5.43%.

Key words: flow cytometry, strawberry nucleus dissociation, CV value