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

Table 5

Association analysis between GDF9 g.17156387C>T genotypes and reproductive traits.

	AFE (days)	BWFE (g)	WFE (g)	BWTA (g)	EWTA (g)	EN (count)
Genotype
CC	165.85±0.9	1799.65±27.46	44.13±0.6	1722.41±19.19	58.33±0.61	98.53±1.48
CT	161.97±1.5	1482.07±42.82	35.72±1.1	1594.05±35.9	53.11±0.8	103.81±2.56
TT	162.13±2.0	1566.25±189.39	38.33±3.5	1650.63±127.14	55.61±2.18	102.63±5.28
P Value	0.04	0.16	0.03	0.78	0.49	0.42
Breed
LH	161.31±0.8	2038.52±34.3	46.77±1.4	1869.7±44.7	61.93±0.9	112.65±2.8
DX	165.61±1.2	1305.22±26.2	34.08±1.1	1503.48±34.2	50.65±0.7	84.91±2.1
P Value	0.008	<0.0001	<0.0001	<0.0001	<0.0001	<0.0001
G x B
P Value	0.06	0.1	0.47	0.39	0.54	0.64

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).