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Table 6 Association of the G+123A with egg production traits and broody traits in Ningdu Sanhuang Chickens

From: The genetic effects of the dopamine D1 receptor gene on chicken egg production and broodiness traits

Traits1 P value GG2 (385) AG2 (217) AA2 (31)
AFE(d) 0.58 135.7 ± 0.6a 136.3 ± 0.7a 137.3 ± 1.9a
EN 0.10 113.3 ± 1.5a 114.6 ± 1.9ab 124.2 ± 4.9b
QEN 0.17 109.8 ± 1.5a 110.3 ± 1.8a 119.2 ± 4.8a
OEN 0.14 3.6 ± 0.3a 4.3 ± 0.4a 5.0 ± 1.0a
EW (g) 0.89 45.8 ± 0.2a 45.7 ± 0.3a 45.5 ± 0.6a
DB(d) 0.35 7.9 ± 0.8a 7.0 ± 1.0a 4.4 ± 2.5a
Number of nonbroody chickens / 186 116 22
Number of broody chickens / 199 101 9
Broody frequency (%) / 51.69 46.54 29.03
χ2value < 0.05 6.58*   
  1. 1AFE = age of first egg; EN = total egg number from 90 to 300 d of age; QEN = total number of qualified eggs from 90 to 300 d of age; OEN = total number of oafish eggs from 90 to 300 d of age; EW = weight of first egg; DB = duration days of broodiness.2Least-square means ± standard errors (SE); Number in brackets referred to the number of tested chickens of each genotype. a, bmeans within a row with no common superscript are different significantly (P < 0.05). * indicated P < 0.05. χ2 0.05(df = 2) = 5.99.