中文摘要：

1材料与方法1．1材料酶和试剂：各种限制性内切酶购自Roche公司，T4DNA连接酶购自上海生工公司，Taq聚合酶、dNTP、凝胶回收试剂盒均购自Promega公司，引物由上海生工公司合成，其他试剂均为进口或国产分析纯。植物材料和质粒：棉花洞A雄性可育株由西南大学棉花教研室提供，表达载体P^BП21质粒和大肠杆菌菌株XL1-Blue由西南大学生物技术中心实验室保存。pUCm-T克隆载体购自上海生工公司。

英文摘要：

cDNA fragment of fertility gene MS2 from cotton was cloned by RT-PCR approach, it was highly homologous with relevant genes of Brassica napus and Arabidopsis thaliana. According to the principles of constructing RNAi vector, sense and antisense fragments of MS2 gene carrying restriction endonuclease recognition sites were amplified via PCR technique, ligated with the first intron of upland cotton chinase gene, then inserted into artificially modified plant expression vector pBI121, yielding RNAi vector pBGP12MSIn. The results showed that RNAi vector pBGP12MSIn harboring MS2 gene driven by anther specific promoter BGP was successfully constructed. Our results laid a foundation for studying the function of this gene and genetic transformation of plant male sterile lines.