Sofia Hill

INTRODUCTION Weed control in modern agricultural production systems relies largely on herbicides. The first synthetic herbicides to be commercialized (e.g., 2,4-D; described by Quastel, 1950) were eventually determined to mimic the endogenous plant hormone auxin. The low cost of these synthetic auxin herbicides, matched with their ability to selectively control broadleaf weeds in cereal production, led to the rapid adoption of herbicide-based weed management.

Abstract A dicamba-resistant population of kochia (Bassia scoparia) previously identified in Colorado, USA in 2012 was used to generate a synthetic mapping population that segregated simply for dicamba resistance. Linkage mapping to associate injury following dicamba application with genotype information from restriction-site-associated DNA sequencing identified a single locus in the kochia genome associated with resistance on chromosome 4.

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