Restricting GMO seeds means no safety testing; refer below.

Source#1scientificamerican.com

Extract: ’Although we appreciate the need to protect the intellectual property rights that have spurred the investments into research and development that have led to agritech’s successes, we also believe food safety and environmental protection depend on making plant products available to regular scientific scrutiny. Agricultural technology companies should therefore immediately remove the restriction on research from their end-user agreements. Going forward, the EPA should also require, as a condition of approving the sale of new seeds, that independent researchers have unfettered access to all products currently on the market. The agricultural revolution is too important to keep locked behind closed doors.’

Source #2: Nature Biotechnology

Extract: Are the crop industry’s strong-arm tactics and close-fisted attitude to sharing seeds holding back independent research and undermining public acceptance of transgenic crops?