Journal of Pharmacognosy and Phytochemistry
Vol. 8, Issue 2 (2019)
Bt cotton: A boon against insect resistance
Perumalla Srikanth, Ann Maxton and Sam A Masih
The cultivation of transgenic cotton is increased in a large scale since from its introduction globally. Bacillus thuringiensis
is produced crystalline proteins, these proteins were used in transgenic cotton to control insect pest. Resistance in insects is a major problem in transgenic cotton growing regions in all over the world especially, pink boll worm developed resistance in all major cotton regions in India. It was noticed in our studies that the expression levels of Cry1Ac in different plant parts such as upper leaves, lower leaves, sepals and boll bracts was increased while increasing refuge percentage. Planting refuge with alternatively with Bt
cotton also increase the Cry1Ac expression levels compare with border refuge. An optimized unique combination of refuge crop viz
., 75% Bt
with 25% nBt
showed higher expression level of Cry1Ac and highest yield was also achieved. This combination is useful to counter insect resistance and the staking of two toxin Cry proteins in same transgenic cotton.
Pages: 202-205 | 1256 Views 296 Downloads
Perumalla Srikanth, Ann Maxton and Sam A Masih. Bt cotton: A boon against insect resistance. J Pharmacogn Phytochem 2019;8(2):202-205.