Genetic Diversity of Suksdorf's Desert Parsley [Lomatium suksdorfii (S. Watson) J.M. Coult. & Rose] in the Columbia Gorge

Suksdorf’s desert parsley (Lomatium suksdorfii (S. Watson) J.M. Coult. & Rose) is a perennial forb of the carrot family (Apiaceae) with a global and state (Washington) ranking as “rare or uncommon” (21-100 occurrences), state (Washington) status as “sensitive”, and federal status as a “species of concern”. Its habitat is limited to Klickitat County in Washington and Hood River and Wasco Counties in Oregon. Species of Lomatium have historically been consumed by Native Americans and have been reputed to have saved tribes from the 1918 flu epidemic. Laboratory studies of root extracts of Lomatium species have shown anti-viral and anti-bacterial effects. Suksdorfin, which is isolated from the fruit of Lomatium suksdorfii, was found to inhibit HIV-l replication in the T cell line H9. Our study using TRAP markers and the software STRUCTURE shows the six locations collected can be placed in four distinct populations with admixture between locations within populations. Knowledge of the extent, distribution, and structure of genetic diversity of L. suksdorfii in its limited habitat can provide a tool for breeders to exploit and improve its medicinal qualities, while maintaining the ecological health of the populations.