Development and evaluation of double gene transgenic cotton lines expressing Cry toxins for protection against chewing insect pests.

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ID: 32337
2019
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Abstract
Cotton is the main fiber producing crop globally, with a significant impact on the economy of Pakistan. Bt cotton expressing a Cry1Ac gene is grown over a large area in Pakistan, however, there is a major concern that bollworms may develop resistance. Here we have used a durable resistance strategy against bollworms by developing a double gene construct containing Cry1Ac and Cry2Ab (pGA482-12R) for cotton transformation. Both Cry toxin genes have been cloned in the same T-DNA borders and transferred successfully into cotton via Agrobacterium-mediated transformation. Both genes are expressed in transgenic cotton plants and is likely to help breeders in developing new cotton cultivars by incorporating these genes in cotton lines having no Bt genes or expressing Cry1Ac gene (Mon 531). Positive transgenic cotton was identified by PCR using specific primers for the amplification of both Cry1Ac and Cry2Ab genes. Cry1Ac and Cry2Ab expression was confirmed with an immunostrip test and quantified using ELISA that showed significant spatio-temporal expression of Cry2Ab ranging from 3.28 to 7.72 µg/g of the tissue leaf. Insect bioassay with army worm (Spodoptera litura) was performed to check the efficacy of NIBGE (National Institute for Biotechnology and Genetic Engineering) double gene transgenic cotton plants and up to 93% insect mortality was observed.
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siddiqui2019developmentscientific Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Siddiqui, Hamid Anees;Asif, Muhammad;Asad, Shaheen;Naqvi, Rubab Zahra;Ajaz, Sobia;Umer, Noroza;Anjum, Naveed;Rauf, Imran;Sarwar, Muhammad;Arshad, Muhammad;Amin, Imran;Saeed, Muhammad;Mukhtar, Zahid;Bashir, Aftab;Mansoor, Shahid;
Journal Scientific reports
Year 2019
DOI
10.1038/s41598-019-48188-z
URL
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