Table 8.

Comparison of Nonparametric and Parametric Regressions, for Two QTLs, in the Presence of Epistasis and with 100 Sib Pairs^[Note]

	Percentagea of
Type of Identification (First QTL/Second QTL)	NP	P1	P2
No dominance effect at either QTLb:
Correct/correct	91.4	94.5	95.6
Correct/incorrect	8.6	5.5	4.4
Incorrect/correct	0	0	0
Incorrect/Incorrect	0	0	0
Dominance effect at the first QTLc:
Correct/correct	78.1	60.8	64.8
Correct/incorrect	6.5	3.3	4.9
Incorrect/correct	12.3	26.4	23.0
Incorrect/incorrect	3.1	9.5	7.3

Note.—Simulation parameter values were α=5, σ²=1, Δ=1, and θ₁=θ₂=θ₃=θ₄=θ₅=.01, and there were 1,000 replications.

^aDefinitions of abbreviations are the same as those given in table 1.

^bTrait variance of 80% was explained by the first QTL.

^cTrait variance of 60% was explained by the first QTL.