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Table 7 Association of the C+1107T 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 CC2 (403) TC2 (201) TT2 (13)
AFE(d) 0.24 136.0 ± 0.6 135.7 ± 0.7 140.7 ± 2.9
EN 0.27 113.6 ± 1.5 115.1 ± 2.0 125.5 ± 7.6
QEN 0.36 109.8 ± 1.4 110.9 ± 1.9 120.3 ± 7.4
OEN 0.37 3.7 ± 0.3 4.2 ± 0.4 5.3 ± 1.5
EW (g) 0.88 45.8 ± 0.2 45.8 ± 0.3 45.3 ± 0.9
Duration of broodiness (d) 0.85 7.5 ± 0.7 7.3 ± 1.0 5.3 ± 3.9
Number of nonbroody chickens / 195 108 11
Number of broody chickens / 208 93 2
Broody frequency (%) / 51.61 46.27 15.38
χ2value < 0.05 7.58*   
  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. χ20.05(df = 2) = 5.99.