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Expression of cry genes from Bacillus thuringiensis: Influence on biochemical composition of transgenic cotton

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Title Expression of cry genes from Bacillus thuringiensis: Influence on biochemical composition of transgenic cotton
 
Creator Dhillon, M K
Davis, J
Sharma, H C
 
Subject Genetics and Genomics
Agriculture-Farming, Production, Technology, Economics
 
Description Continuing need to increase agricultural production has
spurred the urge for developing cultivars with high
productivity and a high degree of resistance to insect pests.
One of the factors constraining crop production is losses due
to insect pests, estimated at 14% of the total agricultural
production (US$ 250 billion), despite application of
insecticides valued at $50 billion annually (Oerke 2006).
However, many insect species, including cotton bollworm,
Helicoverpa armigera (Hubner), have developed high levels
of resistance to conventional insecticides. Therefore, there is
a need to harness all the technologies, including biotechnology
for crop protection for a sustainable growth in agriculture
and food security. To achieve a satisfactory control of insect
pests, genes encoding d-endotoxins from Bacillus
thuringiensis (Bt) have been deployed in a number of crops
including cotton, and approved for commercial cultivation
in several countries. Because of the potential benefits of
growing genetically modified crops, their cultivation has
increased from 1.97 million ha in 1996 to over 160 million
ha in 2011 (James 2011). Cotton cultivars with Bt genes for
resistance to cotton bollworm, H. armigera have resulted in
a significant decrease in number of insecticide sprays applied
for bollworm control in cotton, and increased cottonseed
yield (Sharma et al. 2004, Sharma and Pampapathy 2006,
Dhillon et al. 2012). Although, the promise of genetically
modified crops has been realized in several crops and in
different regions for increasing crop production, it is important
to address the concerns related to their impact on non-target
organisms, biochemical composition and substantial
equivalence to the conventional food.
 
Publisher Indian Council of Agricultural Research
 
Date 2013
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/7382/1/IJAgriSc_83_12_1388-91_2013.pdf
Dhillon, M K and Davis, J and Sharma, H C (2013) Expression of cry genes from Bacillus thuringiensis: Influence on biochemical composition of transgenic cotton. Indian Journal of Agricultural Sciences, 83 (12). pp. 1388-1391. ISSN 0019-5022