小麦Glu-B3位点LMW-GS基因的克隆及序列分析

被引:2
作者
魏燕燕
赵惠贤
李勇超
王银萍
郭蔼光
机构
[1] 西北农林科技大学生命科学学院
关键词
小麦; 低分子量谷蛋白; 基因; 克隆; 序列分析;
D O I
暂无
中图分类号
S512.1 [小麦];
学科分类号
摘要
以小麦特殊遗传材料———六倍体普通小麦阿勃二体、1A缺体、1B缺体和1D缺体,四倍体硬粒小麦墨西粒卡以及二倍体节节麦的总基因组DNA为模板,对D Ovidio等曾报道的硬粒小麦Glu-B3位点LMW-GS基因特异引物对P1(5-′tcctgagaagtgcatgacatg-3′)和P2(5-′gtaggcaccaactccggtgc-3′)进行了PCR扩增验证.结果表明,该引物对同样能特异扩增普通小麦Glu-B3位点LMW-GS基因.利用这对引物通过AS-PCR方法克隆得到优良小麦品种小偃6号1B染色体1个LMW-GS基因片段.该基因全长为1 089 bp,包含了完整的编码区和其上游318 bp的胚乳特异表达启动子区.该基因被命名为XY-Glu-B3-LMW2(GenBank登录号为DQ630442).XY-Glu-B3-LMW2的推测蛋白含256个氨基酸(包括N-端20个氨基酸的信号肽),其成熟蛋白有8个保守的Cys残基,均分布在C-末端区.XY-Glu-B3-LMW2是从小偃6号克隆到的第2个LMW-GS基因.
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页码:1864 / 1869
页数:6
相关论文
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