Cloning and Sequence Analysis of CHS Gene Fragment from Acer truncatum

元宝枫CHS基因片段的克隆及序列分析（英文）

[Objective] This study aimed to clone and analyze the sequence of CHS gene from Acer truncatum leaves. [Method] Using A. truncatum cultivars No.1-6 as experimental materials, total RNA was extracted from A. truncatum leaves with the modified CTAB method. CHS gene sequences were downloaded from the NCBI and aligned by BLAST. Degenerate primers were designed by DNAMAN and Primer- premier5 to amplify the target band. CHS gene fragment was amplified by RT-PCR and ligated to pMD18-T vector. The identified positive colonies were sequenced. [Result] A 1 365 bp fragment was amplified. Sequence analysis suggested that the obtained fragment encoded 365 amino acids and shared above 90% homology to nucleotide sequence of CHS gene from A. palmatum and A. [Conclusion] In this study, CHS gene was successfully cloned from A. truncatum for the first time, which laid the foundation for efficient utilization of CHS gene.

[目的]对元宝枫叶片查尔酮合成酶（CHS）基因片段进行克隆及序列分析。[方法]以元宝枫的红叶新品系1~6号为试材,采用CTAB法提取其夏季与秋季叶片总RNA,搜索Gen Bank数据库中已报道的CHS基因序列,BLAST比对,然后用DNAMAN、Primerpremier5软件设计兼并引物来扩增其目的片段,采用RT-PCR方法扩增CHS基因片段并连接到p MD18-T载体上,阳性克隆经PCR检测后进行测序。[结果]得到一段1 365 bp的序列,序列分析表明,该片段编码365个氨基酸,与鸡爪槭、毛果槭的查尔酮合成酶（CHS）基因核苷酸序列同源性在90%以上。[结论]该研究首次从元宝枫中克隆出了CHS基因,为有效利用该基因奠定了基础。