Table 5.

General linear model results for interaction effects between candidate genes on spring and fall duration

Clock allele	Adcyap1 allele	Migratory trait	βClock × Adcyap1	pClock × Adcyap1
Mean	Min	Spring duration	−1.910	0.019
		Fall duration	−0.740	0.007
	Mean	Spring duration	−0.143	0.934
		Fall duration	−0.720	0.029
Max	Min	Spring duration	−1.450	0.056
		Fall duration	−0.605	0.042
	Mean	Spring duration	0.658	0.671
		Fall duration	−0.558	0.08

Clock and Adcyap1 allele columns indicate whether an individual's minimum, maximum, or mean allele length was used for each analysis. Slope (β) and p‐value are given for the interaction term. Population was also used as a predictor variable, though the slope and p‐values for this factor are not provided. GLMs were only run using mean or max Clock allele lengths and minimum or mean Adcyap1 allele lengths based on results from single gene models. Only models with spring or fall duration as the dependent variable are presented here; no other migratory traits had a significant interaction term. Models with significant interaction effects (p ≤ 0.05) are bolded.