Table 3

Estimates of heritability, standard deviations and common environment variance ratios for different traits.

Trait

σ a

σ c

h2 (S.E)

C2 (S.E)


BW01(Kg)1

0.0045

2.99

0.00(0.00)

0.43(0.06)

BW17(Kg)1

18.25

17.11

0.12(0.20)

0.11(0.08)

BW40(Kg)

99.60

36.36

0.32(0.22)

0.04(0.07)

BW60(Kg)

241.17

41.13

0.39(0.26)

0.01(0.08)

BW80(Kg)

396.29

0.06

0.42(0.12)

1.09E-08(0.00)

BW120(Kg)

652.68

0.04

0.40(0.12)

1.86E-09(0.00)

PBM(%)

0.39

7.11E-10

0.30(0.10)

1.36E-09(0.00)

BrL(mm)

5.51

4.80E-06

0.15(0.06)

2.37E-08(0.00)

BrW(mm)

3.30

1.12E-07

0.17(0.07)

1.73E-09(0.00)

PDL(%)

0.40

NI

0.12(0.06)

NI

pHu

0.03

NI

0.09(0.04)

NI

L*

0.90

NI

0.27(0.09)

NI

a*

0.54

NI

0.30(0.09)

NI

b*

0.30

NI

0.15(0.05)

NI

Aswt(Kg)

737.68

0.07

0.30(0.10)

2.67E-09(0.00)

tmid(day)

0.80

0.00021

0.05(0.04)

3.44E-09(0.00)

scale(day)

0.41

0.00037

0.11(0.06)

8.99E-08(0.00)


σ a = Additive genetic standard deviation; σ c = common environment standard deviation; h2 (S.E) = heritability estimates with standard errors (S.E); c2 (S.E) = common environment variance ratio with standard errors (S.E); BW01, BW17, BW40, BW60, BW80, and BW120 are the BW at days 1,17, 40, 60, 80, and 120 of age; PBM = percentage breast meat at 20 wk of age; BrL = breast length at 20 wk of age; BrW = breast width at 20 wk of age; PDL = percent drip loss at 20 wk of age; pHu = ultimate pH at 20 wk of age; L* = lightness at 20 wk of age; a* = redness at 20 wk of age; b* = yellowness at 20 wk of age; Aswt = upper asymptote (estimated growth curve parameter); tmid = inflection point at 50% asymptote (estimated growth curve parameter); scale = constant that is proportional to the overall growth rate (estimated growth curve parameter). NI = Not Included (common environment) in the analysis for the trait. 1 = Full model with common environment effect was found significantly different from the reduced model for these traits; P < 0.05.

Aslam et al. BMC Genetics 2011 12:14   doi:10.1186/1471-2156-12-14

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