Table 4. Results of likelihood ratio tests on the effects of body region, sex and their interaction on the expression levels of the eleven candidate reference genes.

Gene	Sex		Bodypart		Sex*Bodypart
	χ2	P	χ2	P	χ2	P
GAPDH	0.019	0.889	5.668	0.017	0.965	0.326
TUB1a	0.642	0.423	1.960	0.162	1.995	0.158
EF1a	0.002	0.968	4.096	0.043	0.857	0.355
EF2	1.216	0.270	2.271	0.132	2.030	0.154
ARF1	0.476	0.490	4.147	0.042	2.459	0.117
ARF4	1.417	0.234	4.885	0.027	1.289	0.256
RPS8	0.586	0.444	2.307	0.129	4.007	0.045
RP4	0.356	0.551	4.272	0.039	2.384	0.127
L7A	0.556	0.456	3.087	0.079	2.901	0.089
L10	0.246	0.620	8.509	0.004	3.319	0.068
RP18	1.028	0.311	2.336	0.126	2.896	0.089

Notes.

Significant effects are highlighted in bold.