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Table 2: Segregation of G1 and G4 grape phylloxera resistance

From: Genetic identification of SNP markers linked to a new grape phylloxera resistant locus in Vitis cinerea for marker-assisted selection

Grape Phylloxera Genetic Strain R S Proposed R:S ratio Calculated X2
G1 46 44 1:1 0.0444
G4 32 26 1:1 0.6207
  1. The number of resistant (R) and susceptible (S) F1 individuals is displayed.