Table 5.

Gene expression in the hypothalamus of hens with different laying rates

Genes	HLR1	MLR2	LLR3	P value
GnRH1	1.23 ± 0.24	1.00 ± 0.19	0.80 ± 0.14	0.303
ESR1	0.71 ± 0.15a,b	1.00 ± 0.20a	0.42 ± 0.03b	0.022
IGF1R	0.56 ± 0.10b	1.00 ± 0.17b	2.98 ± 0.40a	<0.001
FSHR	0.82 ± 0.12	1.00 ± 0.14	1.15 ± 0.23	0.381
LHR	1.02 ± 0.17	1.00 ± 0.19	0.98 ± 0.17	0.988
GnIH	0.64 ± 0.09b	1.00 ± 0.09a	1.19 ± 0.04a	<0.001

Data were presented as mean ± SD (N = 6–8).

^a,bMeans with different superscripts within the same line differ significantly, P < 0.05.

¹HLR, hens with high laying rate (laying rate > 85%).

²MLR, hens with intermediate laying rate (60% < laying rate < 85%) from 90 to 94 wk of age.

³LLR, hens with low laying rate (laying rate < 60%).