Environment Secretary Owen Paterson said he wanted the UK to have a "leading role in feeding the world" by utilising GM crops.
Mr Paterson said the Government will make the UK the "best place" for companies and research providers to carry out their work by breaking down any barriers they may face.
He acknowledged public and environmental fears but insisted that "extensive testing" was in place:
"As with all technologies, public and environmental safety is paramount.
"The truth is that products are subject to extensive testing and development in tightly controlled conditions - progressing from laboratory, to glasshouse, to field trials only when it's safe to do so."
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The senior officials, including the head of leader Paul Nuttall's branch, condemned comments from him and millionaire backer Arron Banks.
Lukasz Pawlowski cut his throat with a kitchen knife as he was due to be sentenced in Havefordwest. He has been remanded in custody.
More than 1.85 million people have called for the US president's visit to be watered down to avoid causing "embarrassment" to the Queen.