Polymorphisms in the Chicken Growth Differentiation Factor 9 Gene Associated with Reproductive Traits

Table 7

Association analysis between GDF9 g.17156703A>C genotypes and reproductive traits.

	AFE (days)	BWFE (g)	WFE (g)	BWTA (g)	EWTA (g)	EN (count)
Genotype
AA	160.57±0.8	1635.1±38.09	40.89±1.04	1634.25±27.78	55.73±0.69	103.35±1.82
AC	163.52±0.6	1780.47±51.69	42.57±1.33	1753.84±32.22	57.88±1.19	102.95±2.89
CC	163.95±1.2	1754.09±42.14	41.95±0.88	1714.02±27.72	57.64±0.9	101.31±2.51
P-value	0.01	0.41	0.82	0.14	0.78	0.16
Breed
LH	160.21±0.6	1996.11±15.1	46.83±0.6	1816.94±19.4	62.01±0.4	114.89±1.1
DX	164.25±1.1	1343.39±19.0	35.01±0.8	1547.98±24.5	50.01±0.5	84.94±1.4
P-value	<0.0001	<0.0001	<0.0001	<0.0001	<0.0001	<0.0001
G x B
P-value	0.02	0.37	0.19	0.21	0.35	0.04

AFE = age at first egg, BWFE = body weight at first egg, WFE = weight of first egg, BWTA = body weight at 300 days of age, EWTA = egg weight at 300 days of age, and EN = total number of eggs at 300 days of age. LH means Luhua chickens (N = 232), and DX means Dongxiang blue-shelled chickens (N = 279).
Results are expressed as least square means ± standard errors.
Different letters indicate significant differences (P < 0.05).