High Quality Content by WIKIPEDIA articles! Genetically modified rice are types of rice that have been genetically modified for agricultural purposes. The rice genome is usually modified using particle bombardment via the use of a gene gun or more commonly, a process known as agrobacterium mediated transformation. Rice plants can be modified in DNA to be herbicide resistant, resist pests, increase grain size, generate nutrients, flavours or even produce human proteins. The natural movement of genes across species, often called horizontal gene transfer or lateral gene transfer, can also occur with rice through gene transfer mediated by natural vectors. Some examples of such natural transgenic events in plants through movement of natural mobile DNAs called MULEs between rice and Setaria millet have been identified. The cultivation and use of genetically modified varieties of rice is however controversial and not legal in some countries.