Identifying Pre-Existing Genetic Variation to Combat Herbicide Resistance
A new study has found that pre-existing genetic variation among weeds can lead to faster evolution of herbicide resistance. The study, conducted by researchers from the University of Georgia and the University of Wyoming, focused on Palmer amaranth, one of the most troublesome weeds in the US. The researchers found that Palmer amaranth populations with pre-existing genetic variation were up to four times faster at evolving herbicide resistance than those without. This suggests that even in the absence of herbicide selection pressure, the pre- existing genetic variation is enough to drive the evolution of herbicide resistance. The results of this study have important implications for weed management, as it highlights the importance of implementing integrated weed management strategies to prevent the evolution of herbicide resistance.
source: Phys.org