Molecular Differentiation of Astragalus Species and Varieties from the Western United States: The Chloroplast DNA Bridge Between Evolution and Molecular Systematics

Marwa Neyaz, Daniel Cook & Rebecca Creamer
Locoweeds are the most widespread poisonous plant problem in the world and have been reported in the Western United States since the 1800s, causing tremendous losses in livestock. Consumption of locoweeds by grazing animals stimulates the neurological disease, locoism, characterized by weight loss, ataxia, and lack of muscular coordination. The name locoweed is used for Astragalus and Oxytropis species known to contain swainsonine, the toxic principle produced by the plant endophytic fungus Undifilum. Astragalus includes...
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