Research Article

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

Table 6

Association analysis between GDF9 g.17156427A>G genotypes and reproductive traits.

AFE (days)BWFE (g)WFE (g)BWTA (g)EWTA (g)EN (count)

Genotype
 AA163.38±1.191616.7±34.6943.75±0.841641.09±24.3155.35±0.698.45±1.89
 AG161.5±1.091793.75±40.9742.97±1.031737.36±28.8459.04±0.7105.09±2.08
 GG162.36±2.111853.18±5541.54±1.791734.09±43.0460.83±1.1103.44±3.56
P-value0.60.580.540.980.030.69

Breed
 LH159.52±0.71996.03±15.446.96±0.61815.86±18.261.98±0.3114.59±1.1
 DX166.51±1.41336.56±15.434.85±0.61519.62±22.650.86±0.486.02±1.4
P-value0.0009<0.0001<0.0001<0.0001<0.0001<0.0001

G x B
P-value0.490.310.990.490.0080.44

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).