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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.