Figure 5

Analysis of inbreeding coefficients. a. Plot of average pedigree F by birth date for 91,001 animals in the pedigree of the 3,570 genotyped animals. Averages for the Wye herd animals and their ancestors are in red; averages for the remaining North American Angus and their ancestors are in black. The red line represents the regression of pedigree F on birth date for Wye pedigree animals born after 1950. The green line is the regression of pedigree F on birth date for animals in the North American pedigree born after 1930. The blue line is the regression of pedigree F on birth date for animals in the North American pedigree born after 1980. See Table1 for regression parameter estimates. b. Plot of pedigree against genomic F coefficients. Wye herd animals are plotted in red; all other North American animals are plotted in black. The red line represents the regression of pedigree F on genomic F for Wye herd animals and the black line is for the remaining North American animals. See Table2 for regression parameter estimates.