"Six companies, DuPont, Mitsui, Monsanto, Syngent, Aventis, and Dow control 98 percent of the world's seeds."
"Before it was acquired by Monsanto, Seminis eliminated 2,000 varieties of seeds from its inventory."
[Note: the seeds being eliminated are the older, open-polinated, heirloom varieties. They are being eliminated because they are not patented or genetically modified, which means they are not profitable.]
"... in 1981 there were approximately 5,000 vegetable seed varieties available in U.S. catalogs. Today there are less than 500."