Table 6.

The derivatives of the model cell probabilities are stored in the below 9 × 7 derivative matrix X. Each row captures the parameters present in an expected cell probability K_ij of one of the three phenotypes j in cross i (Table 4). The X matrix captures the structure of the model. Dropping/adding columns corresponds to dropping/adding parameters in a model.

Parameters/K	$\mathit{\lambda }$	$\mathit{\alpha }$	$\mathit{\beta }$	$\mathit{\gamma }$	$\mathit{\alpha }\mathit{\beta }$	$\mathit{\beta }\mathit{\gamma }$	$\mathit{\alpha }\mathit{\gamma }$
$K_{11}$	1	1	−1	0	1	0	0
$K_{12}$	1	−1	1	0	1	0	0
$K_{13}$	1	−1	−1	0	−1	0	0
$K_{21}$	1	0	−1	−1	0	−1	0
$K_{22}$	1	0	1	−1	0	1	0
$K_{23}$	1	0	−1	1	0	−1	0
$K_{31}$	1	1	0	−1	0	0	1
$K_{32}$	1	−1	0	−1	0	0	−1
$K_{33}$	1	−1	0	1	0	0	1