Dow AgroSciences LLC researchers, led by Rod A. Herman, evaluated the impact of crossing (stacking) genetically modified (GM) events on maize grain biochemical composition and compared it with the impact caused by generating non-GM hybrids.
The compositional similarity of seven GM stacks containing event DAS-Ø15Ø7-1 was compared to their corresponding non-GM near-isogenic hybrids (iso-hybrids) and to currently grown non-GM hybrids and their iso-hybrids. Scatter plots were used to visualize comparisons among hybrids.
The composition of GM breeding stacks was found to be more similar to the composition of their iso-hybrids than to the composition of non-GM hybrids to their iso-hybrids. Hence, non-GM breeding is more capable of influenced crop composition than transgenesis or stacking of GM events.
These findings can be grounds to call into question the importance of requiring composition studies for GM crops, especially for breeding stacks composed of GM events previously found to be compositionally similar to iso-hybrids. Read more