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,
which corresponds to the heritability
(h^{2}).
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 h^{2} =
0.5.

Figure ©2002
by
Griffiths et al.; all text
material
©2013 by Steven M. Carr