Already in the major crops of corn, canola, and soy, farmers are in some cases having a difficult time finding non-GM seed. Given the investment in genetic engineering by the big seed and pesticide companies in whichever crops they decide to focus on, whichever traits they decide to focus on, one of the outcomes of the increased corporate concentration is perhaps this disincentive to innovate and focus on a diversity of products for farmers.
On October 4th, 2016. See this statement in context.