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A High-Density Map and PCR Markers for Russian Wheat Aphid Resistance Gene Dn7 on Chromosome 1RS/1BL

Dep. of Soil and Crop Science, Colorado State Univ., Fort Collins, CO 80523-1170. All authors contributed equally to this study

View larger version (18K): [in this window] [in a new window]   Figure 1. (A) Genetic map of Dn7 in rye chromosome arm 1RS and (B) physical map location of markers on wheat group 1 chromosome based on previous studies (Sandhu et al., 2001; Peng et al., 2004).

View larger version (96K): [in this window] [in a new window]   Figure 2. Testing of PCR markers linked to Dn7 on 19 wheat cultivars. A) Xrems1303 and B) Xib26. Lanes 1 through 20 represent 50-bp DNA ladder (Invitrogen, Carlsbad, CA), 94M370, Gamtoos, Amigo, KS91WGRC14, MA1, MA2, Bobwhite ‘S’, Above, TAM107, ST-ARS02RWA2414-11, Prairie Red, CI2401-A2, Halt, Stanton, Ankor, Lakin, Avalanche, Betta, and Baviaans, respectively. R and S stand for resistance and susceptibility to Russian wheat aphid biotype 2, respectively.