Table 4.

Markers identified in stepwise regression

Chromosome	Marker	Position	F-ratio	Degrees of freedom (denominator)
2	D2Mit182	0.01	5.42	996
2	D2Mit106	31.51	6.27	998
2	D2Mit107	31.81	57.79	1,004
2	D2Mit194	39.51	3.04	994
11	D11Mit36	40.31	307.63	1,006
11	D11Mit127	55.41	22.32	1,000
12	D12Mit28	25.01	41.71	1,002

QTL position is calculated by mapmaker and is given in cM. The significance of the partial regression coefficients (to model additive and dominance effects) for each marker are evaluated as they stepwise increment the multiple regression model. The numerator degrees of freedom is 2 for each marker. The denominator degrees of freedom is 1,009 (number of animals) − 1 − 2 multiplied by the number of markers included in the regression equation at each step. All F-ratios are significant at the 5% level.