Fig. 2

Imputation accuracy assessed by alternative approaches. a Imputation from 5K to 50K (Scenarios 1_5K50K and 3_5K50K) and from 50K to HD (Scenarios 2_50KHD and 4_50KHD) using the FIMPUTE software for purebred Romney animals (The suffix “KEY” refers to the 31 animals that are highly related with the group of imputed animals). b Imputation from 5K to 50K (Scenarios 1_5K50K and 5_5K50K) and from 50K to HD (Scenarios 2_50KHD and 6_50KHD) using the FIMPUTE software for purebred Romney animals after including Perendale animals in the reference set. c Imputation from 5K to 50K using the FIMPUTE software for purebred Romney animals after using the Primera group as reference set (Scenario 15_5K50K) and inclusion of Romney animals in the reference set (Scenarios 16_5K50K and 17_5K50K). Scenario 9 was included in this plot for comparison with within-breed imputation. d Imputation from 5 K to HD using the FIMPUTE software for purebred Romney animals by one- or two-step imputation (Scenarios 1B_5KHD_1STEP and 1B_5KHD_2STEP). The x-axis represents the number of imputed individuals sorted from the highest to the lowest accuracy value