Abstract—Agriculture is the backbone of economy of Pakistanand cotton is the major agricultural export and supreme source of rawfiber for our textile industry. To combat severe problems of insectand weed, combination of three genes namely Cry1Ac, Cry2A andEPSPS genes was transferred in locally cultivated cotton varietyMNH-786 with the use of Agrobacterium mediated genetictransformation. The present study focused on the molecular screeningof transgenic cotton plants at T3 generation in order to confirmintegration and expression of all three genes (Cry1Ac, Cry2A andEPSP synthase) into the cotton genome. Initially, glyphosate sprayassay was used for screening of transgenic cotton plants containingEPSP synthase gene at T3 generation. Transgenic cotton plants whichwere healthy and showed no damage on leaves were selected after 07days of spray. For molecular analysis of transgenic cotton plants inthe laboratory, the genomic DNA of these transgenic cotton plantswere isolated and subjected to amplification of the three genes. Thus,seventeen out of twenty (Cry1Ac gene), ten out of twenty (Cry2Agene) and all twenty (EPSP synthase gene) were produced positiveamplification. On the base of PCR amplification, ten transgenic plantsamples were subjected to protein expression analysis throughELISA. The results showed that eight out of ten plants were activelyexpressing the three transgenes. Real-time PCR was also done toquantify the mRNA expression levels of Cry1Ac and EPSP synthasegene. Finally, eight plants were confirmed for the presence and activeexpression of all three genes at T3 generatio
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