Scientists from Cornell University and colleagues from other institutions have identified genes that control Vitamin E content in the maize grain.

The researchers used different types of genetic association analyses to identify 14 genes across the maize genome involved in the synthesis of vitamin E. Six genes were newly discovered to encode proteins that contribute to a class of antioxidant compounds called tocochromanols, collectively known as vitamin E. Aside from antioxidant properties, tocochromanols are associated with good heart health in humans and proper functioning in plants.

You can read the whole article here: http://www.isaaa.org/kc/cropbiotechupdate/article/default.asp?ID=15933 and http://mediarelations.cornell.edu/2017/11/01/vitamin-e-discovery-in-maize-could-lead-to-more-nutritious-crop/