A dicamba resistance endowing IAA16 mutation leads to significant vegetative growth defects and impaired competitiveness in kochia (Bassia scoparia)

Chenxi Wu, Sherry LeClere, Kang Liu, Marta Paciorek, Alejandro Perez-Jones, Phil Westra & Douglas Sammons
Precise quantification of the fitness cost of synthetic auxins resistance has been impeded by lack of knowledge for the genetic basis of resistance in weeds. Recent elucidation of a resistance endowing IAA16 mutation (G73N) in a key weed species kochia (Bassia scoparia), allows detailed characterization of the contribution of resistance alleles to weed fitness, both in the presence and absence of herbicides. Different G73N genotypes from a segregating resistant parental line (9425) were characterized for...
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