BEIJING, Dec 28 (Reuters) - China plans to approve the safety of more genetically modified (GMO) corn varieties produced by domestic companies, the agriculture ministry said late on Monday.

The move comes after Beijing last month proposed an overhaul of regulatory seed rules to pave the way for approval of GMO crops and as top policy makers urged progress in biotech breeding, seen as key to ensuring food security.

The three new corn products include ND207 produced by China National Tree Seed Corp and China Agricultural University, Zheda Ruifeng 8 made by Hangzhou Ruifeng Biotech Co and DBN3601T from Beijing Dabeinong Biotechnology Co, according to the notice posted on the website of the Ministry of Agriculture and Rural Affairs.

The plan to approve the new corn varieties, along with seven new GMO cotton products, will be open for public comment until Jan. 17, the ministry said.

The DBN3601T corn is an upgraded variety from DBN9501 and DBN9936, two corn traits owned by Dabeinong Biotech, parent company Dabeinong Technology Group Co said in a statement.

Dabeinong will work with partners to get ready for the commercialization of the product, and prepare inventories of the variety, Dabeinong Technology said.

The new variety, combining traits from both DBN9501 and DBN9936, will have stronger resistance to a wider range of insects, especially the fall armyworm, according to a statement released on the company's website.

Safety approval is seen as a major step towards commercialization of GMO crops, but it is still unclear when the new products will be ready for a market launch.

Beijing has so far not permitted the planting of GMO soybean or corn varieties, but it allows their import for use in animal feed.

Both Hangzhou Ruifeng, in which Yuan Longping High-Tech Agriculture Co Ltd owns 41.8%, and Beijing Dabeinong already own GMO corn traits approved as safe by the government. (Reporting by Hallie Gu and Emily Chow; Editing by Richard Pullin and Christian Schmollinger)