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    赵桂媛, 魏志刚, 刘关君, 张凯旋, 刘桂丰, 杨传平. 策略构建小黑杨茎形成层全长cDNA文库[J]. 北京林业大学学报, 2010, 32(1): 52-56.
    引用本文: 赵桂媛, 魏志刚, 刘关君, 张凯旋, 刘桂丰, 杨传平. 策略构建小黑杨茎形成层全长cDNA文库[J]. 北京林业大学学报, 2010, 32(1): 52-56.
    ZHAO Gui-yuan, WEI Zhi-gang, LIU Guan-jun, ZHANG Kai-xuan, LIU Gui-feng, YANG Chuan-ping.. Construction of fulllength cDNA library from stem cambium of Populus simonii ×P. nigra with SMART strategy[J]. Journal of Beijing Forestry University, 2010, 32(1): 52-56.
    Citation: ZHAO Gui-yuan, WEI Zhi-gang, LIU Guan-jun, ZHANG Kai-xuan, LIU Gui-feng, YANG Chuan-ping.. Construction of fulllength cDNA library from stem cambium of Populus simonii ×P. nigra with SMART strategy[J]. Journal of Beijing Forestry University, 2010, 32(1): 52-56.

    策略构建小黑杨茎形成层全长cDNA文库

    Construction of fulllength cDNA library from stem cambium of Populus simonii ×P. nigra with SMART strategy

    • 摘要: 为了研究小黑杨木材形成过程中的关键基因,以2年生小黑杨茎形成层组织为试验材料提取RNA,采用SMART (RNA 转录过程中的5′末端转换机制) 技术合成cDNA第一链,通过LD-PCR合成双链cDNA。利用SfiⅠ限制性酶酶切后将其连接到质粒载体pDNR-LIB上,采用电穿孔法将重组质粒转化到大肠杆菌感受态细胞DH5α中,构建全长cDNA文库。文库质量鉴定表明:原始文库滴度为2.18×106 pfu/mL,扩增后的文库滴度为5.46×109 pfu/mL,重组率为96%。插入片段长度在0.5~2.0 kb之间,平均长度为1.12 kb,表明构建的小黑杨茎形成层cDNA文库较为理想。

       

      Abstract: In order to investigate the key genes during wood formation, total RNA was extracted from the stem cambium tissue of twoyearold Populus simonii × P. nigra. The firststrand cDNA was synthesized using switching mechanism at 5′ end of RNA transcript (SMART) technology, and double strand cDNA was synthesized with LDPCR. Then double strand cDNA was cut by SfiⅠ restriction enzyme and ligated with pDNRLIB vector. The recombinant plasmid was transformed into Escherichia coli DH5α by electroporation. The library quality was evaluated, and the results showed that the titer of primary cDNA library and amplified cDNA library were 218×106 pfu/mL and 546×109 pfu/mL, respectively, with the recombination rate of 96%. The inserted fragments were distributed from 05 to 20 kb, and its average size was 112 kb. These results indicate that the P. simonii ×P. nigra cDNA library is constructed successfully. 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