刘海楠;冯建荣;李文慧;罗明;刘小芳;孙军利;

• 1:石河子大学农学院·特色果蔬栽培生理与种质资源利用兵团重点实验室
• 2:西南大学生物技术中心·农业部生物技术与作物品质改良重点开放实验室

摘要(Abstract)：

【目的】利用基因工程技术改良杏自交不亲和性状,为培育自交亲和杏品种奠定基础。【方法】以新疆自交不亲和杏品种‘小白杏’(Prunus armeniaca L.‘Xiaobaixing’)的花粉为材料,通过RT-PCR(Reverse Transcription PCR)和3’RACE(Rapid Amplification of c DNA Ends)技术克隆SFB基因(S-haplotype-specific F-box protein)片段。以克隆载体p MD19-T为基础,结合p BS-T上的酶切位点,利用酶切连接的方法将SFB基因的ORF框正向重组到表达载体p CAMBIA-35S-MCS-NOS-NPTII的Kpn I和Sac I酶切位点之间,构建SFB基因正义表达载体p CAMBIA-S-SFB;将SFB基因的ORF框反向重组到表达载体的Kpn I和Sal I酶切位点之间,构建SFB基因反义表达载体p CAMBIA-A-SFB;用电击转化法将重组质粒转化至农杆菌菌株(Agrobacterium tumefaciens)LBA4404中。【结果】通过RT-PCR和RACE技术获得了1136 bp SFB基因片段(Gen Bank登录中),其中含912 bp ORF框(Open Reading Frame),由它推导的氨基酸序列与蔷薇科SFB基因高度同源,具有F-box结构域、2个变异区和2个高变区的完整结构;表达载体酶切检验结果表明,SFB基因的ORF框正确地插入p CAMBIA-35S-MCS-NOS-NPTII的启动子和终止子之间,表明SFB基因的正、反义表达载体构建成功;特异引物PCR验证结果也表明重组质粒已经成功转入农杆菌LBA4404中。【结论】研究的结果为利用基因工程技术改良杏自交不亲和性状、培育自交亲和杏品种的遗传转化提供了载体。

关键词(KeyWords)： 杏;自交不亲和;SFB基因;表达载体

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(31272129)

作者(Author): 刘海楠;冯建荣;李文慧;罗明;刘小芳;孙军利;

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DOI:

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