We investigated the genetic diversity and origins of a long-term cultivar. Dyer’s woad has been used as a dye source for at least eight centuries in Eurasia. It was introduced… Click to show full abstract
We investigated the genetic diversity and origins of a long-term cultivar. Dyer’s woad has been used as a dye source for at least eight centuries in Eurasia. It was introduced to eastern USA in the 1600s, and is now considered invasive in the western USA. Our analysis of plants from the USA and Eurasia suggests that there are two distinct invasions in western USA that most likely originate from Switzerland, Ukraine and Germany. This information assists in finding effective biological control agents, and continued combination of ecological and molecular data helps bring us closer to sustainable management of plant invasions.
               
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