Escaped genes - a risk assessment minefield
March 2022
While conventional breeding speeds up the evolution of plants and skews it gradually to fit human needs, genetic engineering forces abrupt and disruptive changes in genome structure and function. The artificial gene (or edit) functions as it's designed to within the highly uniform genetic and environmental context of a modern commercial crop. How does it function in any other genome and ecosystem?
Risk assessment of GM plants has always focused on the intended artificial trait coupled to an assumption that if the altered bit of DNA 'escaped' into other plant populations it would fizzle out over time unless it conferred a clear, identifiable, risk-assessable fitness advantage. Now that we've grown GM crops in various environments for over two decades and there's been time for gene contamination incidents to inform the science, this trait-centred risk assessment is proving shaky.
While conventional breeding speeds up the evolution of plants and skews it gradually to fit human needs, genetic engineering forces abrupt and disruptive changes in genome structure and function. The artificial gene (or edit) functions as it's designed to within the highly uniform genetic and environmental context of a modern commercial crop. How does it function in any other genome and ecosystem?
Risk assessment of GM plants has always focused on the intended artificial trait coupled to an assumption that if the altered bit of DNA 'escaped' into other plant populations it would fizzle out over time unless it conferred a clear, identifiable, risk-assessable fitness advantage. Now that we've grown GM crops in various environments for over two decades and there's been time for gene contamination incidents to inform the science, this trait-centred risk assessment is proving shaky.
GM safeguards scrapped in the UK
February 2022
As Westminster continues its love affair with high-tech industrial agriculture, the dismantling of GM safeguards in the UK is underway.
Towards the end of 2021, our Environment Secretary announced regulatory exemptions for field trials of "plants produced by genetic technologies where genetic changes could have occurred naturally or could have been a result of traditional breeding methods".
As Westminster continues its love affair with high-tech industrial agriculture, the dismantling of GM safeguards in the UK is underway.
Towards the end of 2021, our Environment Secretary announced regulatory exemptions for field trials of "plants produced by genetic technologies where genetic changes could have occurred naturally or could have been a result of traditional breeding methods".
GM cotton in India
February 2022
Once upon a time in India, farmers grew indigenous ('desi') Asiatic cotton.
Desi cotton was grown in multi-cropping systems which provided back-up crops if one of them failed. It could be planted at a high density to increase yield and had a short season which reduced pest exposure. This traditional cotton had good tolerance to biotic and abiotic stresses, including bollworm, saline conditions and drought. Today, the crop accounts for less than 3% of the cotton area in India.
Once upon a time in India, farmers grew indigenous ('desi') Asiatic cotton.
Desi cotton was grown in multi-cropping systems which provided back-up crops if one of them failed. It could be planted at a high density to increase yield and had a short season which reduced pest exposure. This traditional cotton had good tolerance to biotic and abiotic stresses, including bollworm, saline conditions and drought. Today, the crop accounts for less than 3% of the cotton area in India.
GM staples in Africa
February 2022
The vast continent of Africa has long been a key target for GM agriculture [1,2]. So far, three GM crop types (cotton, soya and maize) all with the standard insect-resistance or herbicide-tolerance traits have been released across six African countries, the most widely adopted one being 'Bt' insecticidal cotton. These are all commodity crops designed for maximum yield, and are promoted as a tool to boost agricultural productivity and alleviate food insecurity. There has, however, been a clear gap between the promises and the reality.
A study published in 2021 explored this problem.
The vast continent of Africa has long been a key target for GM agriculture [1,2]. So far, three GM crop types (cotton, soya and maize) all with the standard insect-resistance or herbicide-tolerance traits have been released across six African countries, the most widely adopted one being 'Bt' insecticidal cotton. These are all commodity crops designed for maximum yield, and are promoted as a tool to boost agricultural productivity and alleviate food insecurity. There has, however, been a clear gap between the promises and the reality.
A study published in 2021 explored this problem.
GM wheat in Argentina
February 2022
In 2004, the US, Canadian and European wheat markets breathed a sigh of relief when Monsanto yielded to pressure and withdrew its glyphosate-tolerant GM wheat from the pipeline.
Predictably, it was just a matter of time before GM wheat popped up again, this time as 'HB4' with combined drought-resistance and tolerance to glufosinate herbicide.
HB4 has now been approved by Argentina: no surprise there, because the country has long been a key route used by the agrichemical industry as a bridgehead to the rest of Latin America for the (legal and illegal) dissemination of its products.
In 2004, the US, Canadian and European wheat markets breathed a sigh of relief when Monsanto yielded to pressure and withdrew its glyphosate-tolerant GM wheat from the pipeline.
Predictably, it was just a matter of time before GM wheat popped up again, this time as 'HB4' with combined drought-resistance and tolerance to glufosinate herbicide.
HB4 has now been approved by Argentina: no surprise there, because the country has long been a key route used by the agrichemical industry as a bridgehead to the rest of Latin America for the (legal and illegal) dissemination of its products.
GM animals on the menu
January 2022
As we enter 2022, what happened to the GM edible animals that we've been promised over the years?
Super-fast growing GM salmon have been trying to emerge from the lab since 1989 [1,2,3].
Having gained regulatory approval in America in 2015, GM salmon are now legal to produce and sell there despite being declared unlawful in 2020 due to the absence of any environmental risk assessment.
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