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Representation of crosses between M. persicae clones with different kdr/skdr genotypes showing the two possible scenarios for segregation of resistance mutations in the progeny. (a) 800 F (wild type, WT)×2169G (double het) and (b) 2169G (double het)×108T (F1014 het). (i) F1014 and T918 reside in different alleles for 2169G and (ii) F1014 and T918 reside in the same allele for 2169G. L, L1014 (WT); F, F1014 (kdr mutation); M, M918 (WT); T, T918 (super-kdr mutation).
