Midparent / offspring correlation as an estimation of heritability
The
red dots
show the correspondence between the phenotype values of the offspring (Y-axis) and the midparent (the average of the two
parents) (X-axis). The red line is the calculated regression line (MGA2 18-20),
which corresponds to the heritability
(h2).
Perfect heritability would be indicated by a line with slope = 1.0
(dashed blue line).
Here, the points are somewhat more scattered, and the slope and
heritability are calculated as h2 = 0.5.