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EasyKASP:基于Excel的一键高通量KASP引物设计工具

  • 2026-03-23 12:41:21
EasyKASP:基于Excel的一键高通量KASP引物设计工具
近日,生物信息学SCI 期刊《BMC Bioinformatics》发表了EasyKASP: a simple and fast tool for KASP primer design,作者用我们最熟悉也最简单的办公软件——Excel,开发了一款免费、用户友好、支持 SNP 和 InDel 的高通量 KASP 引物设计工具。即便对于没有任何编程基础的用户,也能轻松实现“一键式”KASP引物设计

EasyKASP使用操作流程

一、 一段话总结

EasyKASP 是一款基于 Excel VBA 开发的免费、用户友好的 KASP 引物设计工具,专为 SNP 和 InDel 变异 设计,平均每对引物处理时间仅 0.03 秒,支持高通量设计且无需网络连接;其设计的引物遵循严格参数标准(如特异性引物长度 21-27bp、通用引物 Tm 值高于特异性引物 2℃等),经 80 个 SNP 位点和 6 个不同长度 InDel 位点验证,全部成功扩增和基因分型,相比现有工具在免费性、InDel 支持、操作便捷性上具有显著优势,广泛适用于农业育种、医学研究等 KASP 基因分型场景。

二、EasyKASP 开发细节

开发平台与语言:基于 Excel VBA(Visual Basic for Applications),利用 Excel 的字符处理函数(FIND/MID/LEN 等)和 VBA 循环结构实现自动化设计。

输入要求:仅需 4 列信息 —— 位点名称、变异类型(SNP/InDel)、至少 70bp 侧翼序列(变异位点用方括号标注)。

设计流程(3 步):

侧翼序列分析:定位变异位点,根据 25bp 区域 GC 含量(接近 45%)和无重复碱基原则确定引物设计方向;

候选引物筛选:评估 Tm 值、GC 含量、重复碱基、SSR 重复单元等参数;

引物输出:特异性引物添加 21bp 通用尾序列,通用引物进行反向互补处理,以友好格式输出结果。

三、核心参数与设计标准

四、性能与验证结果

效率表现:

单位点处理时间:平均 0.03 秒;

批量处理能力:20 个变异位点仅需 0.57 秒;

资源需求:占用内存小,无需网络连接。

验证结果:

SNP 验证:80 个 SNP 位点(黄瓜 / 番茄),全部成功扩增和基因分型;

InDel 验证:6 个不同长度 InDel 位点(1-50bp,含功能基因相关位点如 CsAPRR2、CsMLO1),均实现准确基因分型,成功率 100%。

五、与其他工具对比(核心优

六、使用要求

操作系统:Windows;

软件要求:Microsoft Office 2007 及以上版本;

其他:启用宏功能,无需额外依赖。

资源获取:开源代码、用户手册可通过 GitHub 获取(https://github.com/zhangjian0603/KASP-primer-design),SNP 位点和引物可在 VegSNPDB 查询。

七、 关键问题

问题 1:EasyKASP 相比现有同类工具,核心竞争优势体现在哪些方面?

答:① 免费且无使用限制,非学术用户也可使用;② 同时支持 SNP 和 InDel 变异(尤其是 1-50bp 长度 InDel),多数现有工具不支持 InDel;③ 基于 Excel VBA 开发,无需复杂安装,本地运行且无需网络,操作门槛低,适合非编程背景的科研人员;④ 高通量设计效率高(0.03 秒 / 引物对),自动添加特异性引物的 21bp 通用尾序列,无需手动处理;⑤ 输出格式友好,直接提供可用于实验的引物序列(FAM/HEX 标记引物 + 通用引物)。

问题 2:EasyKASP 设计 KASP 引物时,关键参数的约束标准是什么?

答:核心参数约束包括:① 长度:特异性引物 21-27bp,通用引物 22-32bp;② GC 含量:最优 30-60%,允许范围 20-70%;③ Tm 值:特异性引物 57.5±1.5℃,通用引物 60.5±1.5℃,且通用引物 Tm 值需比特异性引物高 2℃;④ 碱基规则:无 6 个连续重复碱基、无 4 个连续互补碱基、无 3 个以上 SSR 重复单元,3' 端无 4 个连续 G/C 或 5 个连续 A/T;⑤ 产物大小:变异位点到通用引物距离 < 30bp,总产物 < 100bp,确保扩增效率。

问题 3:EasyKASP 的验证实验如何开展,结果如何体现其可靠性?

答:验证实验分为两部分:① SNP 验证:提取 96 个杂交品种的基因组 DNA(浓度≥50ng/µL),使用 EasyKASP 设计的 80 个 SNP 引物进行 KASP 反应( touchdown PCR 程序),通过荧光信号聚类分析基因分型,所有位点均成功扩增且基因型判断准确;② InDel 验证:选择黄瓜中 6 个不同长度(1-50bp)的 InDel 位点(含 4 个功能基因相关位点),设计引物后进行 KASP 实验,全部实现有效扩增和精准基因分型。两次验证的 100% 成功率,直接证明了 EasyKASP 设计引物的实验可靠性和广泛适用性。

参考文献:

Zhang et al. EasyKASP: a simple and fast tool for KASP primer design, BMC Bioinformatics (2025) 26:292. https://doi.org/10.1186/s12859-025-06322-x

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  1. CONNECT:[ UseTime:0.000467s ] mysql:host=127.0.0.1;port=3306;dbname=h_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000587s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000282s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000301s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000512s ]
  6. SELECT * FROM `set` [ RunTime:0.000257s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000634s ]
  8. SELECT * FROM `article` WHERE `id` = 469206 LIMIT 1 [ RunTime:0.000461s ]
  9. UPDATE `article` SET `lasttime` = 1775305081 WHERE `id` = 469206 [ RunTime:0.001577s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000304s ]
  11. SELECT * FROM `article` WHERE `id` < 469206 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.002952s ]
  12. SELECT * FROM `article` WHERE `id` > 469206 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001440s ]
  13. SELECT * FROM `article` WHERE `id` < 469206 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001673s ]
  14. SELECT * FROM `article` WHERE `id` < 469206 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.003016s ]
  15. SELECT * FROM `article` WHERE `id` < 469206 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002354s ]
0.087462s