Contrast
|
Production Characterization
|
|||||
|
LIVE & CARCASS YIELDS (47 days)
|
|||||
|
Live 0-47 Days
|
Abdominal fat
|
||||
|
% Gain
|
F:G
|
% Mort
|
Wt (g)
|
% carc
|
carcass g w/o fat
|
Dam
|
**
|
*
|
*
|
***
|
***
|
*
|
Cb
|
2853a
|
1.92ab
|
5.8b
|
58a
|
2.95b
|
1926a
|
R3
|
2783b
|
1.87b
|
5.4b
|
53b
|
2.75c
|
1863b
|
HY
|
2749b
|
1.95a
|
9.0a
|
60a
|
3.15a
|
1869b
|
R2
|
2774b
|
1.91ab
|
4.0b
|
57a
|
3.02b
|
1858b
|
Sex
|
***
|
***
|
***
|
NS
|
***
|
***
|
M
|
3078
|
1.86
|
8.8
|
57
|
2.67
|
2072
|
F
|
2492
|
1.99
|
3.3
|
57
|
3.27
|
1686
|
|
CARCASS GRADE AND DEFECTS (% Population)
|
|||||
|
WING
|
CLAVICLE
|
BACK
|
|||
|
Grade A
|
Broken
|
Bruise
|
Broken
|
Bruise
|
Tear
|
Dam
|
*
|
*
|
*
|
NS
|
*
|
*
|
Cb
|
46.6ab
|
4.3ab
|
20.7a
|
22.0
|
14.7ab
|
6.5ab
|
R3
|
42.0b
|
7.4a
|
13.6ab
|
20.2
|
25.0a
|
4.4b
|
HY
|
56.5a
|
1.2b
|
9.9b
|
14.5
|
12.5b
|
9.1a
|
R2
|
56.2ab
|
2.7ab
|
11.3a
|
23.4
|
13.2ab
|
5.5ab
|
Sex
|
NS
|
**
|
NS
|
**
|
NS
|
***
|
M
|
49.5
|
5.9
|
12.6
|
23.8
|
17.2
|
3.1
|
F
|
51.0
|
1.9
|
15.1
|
16.3
|
15.5
|
9.7
|
|
FURTHER PROCESSING YIELD (% Carcass)
|
|||||
|
Fillets
|
Tenders
|
Thigh
|
Wings
|
Drums
|
Cage
|
Dam
|
***
|
**
|
NS
|
***
|
**
|
*
|
Cb
|
21.2b
|
5.2ab
|
15.0
|
11.0b
|
13.4ab
|
34.2ab
|
R3
|
21.9a
|
5.1b
|
14.9
|
11.3a
|
13.5a
|
33.2c
|
HY
|
22.3a
|
5.3a
|
14.5
|
10.8c
|
13.2b
|
33.9bc
|
R2
|
20.8b
|
5.1b
|
14.7
|
11.3a
|
13.5a
|
34.6a
|
|
|
|
|
|
|
|
Sex
|
NS
|
***
|
**
|
NS
|
***
|
***
|
|
|
|
|
|
|
|
M
|
21.6
|
5.0
|
15.0
|
11.1
|
13.8
|
33.5
|
|
|
|
|
|
|
|
F
|
21.4
|
5.3
|
14.5
|
11.1
|
13.0
|
34.6
|
|
|
|
|
|
|
|
1 Sires were Ross in all crosses with different dams as coded. Values were based on a total of 32 pens each having 33 birds at start of experimentation. Data are presented as contrasts of strain-crosses and sexes in the absence of interactions (P>.05).
(Moran, unpublished). |
Age (wk)
|
Strain
|
|||
PxA
|
Prob.
|
RxR
|
SEM
|
|
0
|
.3
|
NS
|
.3
|
.03
|
2
|
25
|
NS
|
24
|
.5
|
4
|
109
|
*
|
94
|
2.9
|
6
|
224
|
**
|
205
|
4.3
|
8
|
414
|
***
|
347
|
6.8
|
10
|
551
|
***
|
479
|
7.0
|
12
|
675
|
**
|
604
|
10.1
|
1 Selected data from Acar et al. (1993) with birds receiving common feed exceeding NRC (1994) nutrient requirements.
|
Lysine (% Diet)
|
g Live Wt. 8 Wk
|
g BW Gain 6-8 Wk
|
F/G 6-8 Wk
|
g Fillets
|
g Tenders
|
g Thigh Meat
|
||||||
P x A
|
R x R
|
P x A
|
R x R
|
P x A
|
R x R
|
P x A
|
R x R
|
P x A
|
R x R
|
P x A
|
R x R
|
|
.75
|
3126
|
3038
|
935
|
945
|
2.59
|
2.53
|
357
|
371
|
89
|
90
|
329
|
325
|
.85
|
3213
|
3085
|
990
|
968
|
2.52
|
2.49
|
363
|
392
|
87
|
97
|
337
|
325
|
.95
|
3150
|
3084
|
935
|
970
|
2.58
|
2.47
|
369
|
394
|
89
|
95
|
336
|
329
|
1.05
|
3114
|
3040
|
943
|
949
|
2.48
|
2.46
|
364
|
392
|
91
|
98
|
326
|
327
|
1.15
|
3139
|
3041
|
965
|
950
|
2.52
|
2.52
|
354
|
394
|
87
|
94
|
334
|
324
|
SEM
|
39.3
|
27.3
|
.035
|
7.5
|
1.7
|
5.1
|
||||||
Strain
|
**
|
NS
|
NS
|
***
|
***
|
*
|
||||||
Lysine
|
NS
|
NS
|
NS
|
NS
|
NS
|
NS
|
||||||
SxL
|
NS
|
NS
|
NS
|
*
|
*
|
NS
|
||||||
1 Selected data from Acar et al. (1991). Basal feed employed corn and soybean meal with CP - 18.12%.
|
6-7 Wk LIVE PERFORMANCE
|
||||
|
g Wt. @ 7 Wk
|
g Gain
|
F:G
|
Total F:G
|
|
|
|
|
|
Control
|
2927a
|
572a
|
2.10a
|
1.85
|
w/o CaP
|
2875b
|
523b
|
2.27b
|
1.88
|
CHILLED CARCASS YIELD
|
||||
|
g Presl. Loss
|
g Abd. Fat
|
g Carcass w/o Fat
|
% Yield
|
Control
|
186a
|
50
|
1852
|
67.5
|
w/o CaP
|
167b
|
50
|
1827
|
67.5
|
CARCASS DEFECTS
|
||||
|
% Bkn. Drums
|
% Bkn. Clavicle
|
% Breast Blister
|
% Back Bruise
|
|
|
|
|
|
Control
|
0.5b
|
21.3b
|
28.9a
|
21.3
|
w/o CaP
|
3.5a
|
29.0a
|
18.4b
|
14.4
|
DEBONED CARCASS
|
||||
|
% Bkn. Femur2
|
% Fillets
|
% Tenders
|
% Thighs
|
|
|
|
|
|
Control
|
3.0b
|
20.2
|
4.7
|
15.4
|
w/o CaP
|
19.4a
|
20.5
|
4.7
|
15.3
|
1 Selected data from Chen and Moran (1995). Omitting dicalcium phosphate from the final feed decreased total P from 0.57 to 0.34% and Ca from 0.82 to 0.54%.
2 Broken femurs encountered during deboning of carcasses on cones to obtain skinless boneless meats. |
Lighting Program from 1-14 Days =>
|
23(L):1(D)
|
3(L):1(D)
|
6(L):18D)
|
6(L):18(D)
|
Lighting Program from 15-56 Days =>
|
3(L):1(D)
|
23(L):1(D)
|
||
Measurement
|
|
|
|
|
|
|
|
|
|
21 DAYS OF AGE
|
||||
|
|
|
|
|
Body Weight (g)
|
861a
|
804b
|
733c
|
742c
|
F/G 0-21 Days
|
1.28
|
1.26
|
1.27
|
1.29
|
42 DAYS OF AGE
|
||||
|
|
|
|
|
Body Weight (g)
|
2291a
|
2228ab
|
2191b
|
2200b
|
F/G 0-42 Days
|
1.73
|
1.71
|
1.72
|
1.75%
|
Abnormal Legs2
|
6.2
|
5.9
|
1.7
|
5.2%
|
Incidence TD
|
14.4
|
13.8
|
10.8
|
12.6
|
Abdominal Fat, Wt. (g)
|
51
|
48
|
48
|
48
|
Chilled Carcass w/o Fat, Wt. (g)
|
1495a
|
1447ab
|
1417b
|
1427b
|
% Live Wt.
|
65.3
|
65.9
|
64.7
|
64.9
|
Breast Cut 3, Wt. (g)
|
614a
|
575b
|
576b
|
575a
|
% Live Wt.
|
26.8a
|
25.8b
|
26.3ab
|
26.1ab
|
56 DAYS OF AGE
|
||||
|
|
|
|
|
Body Weight (g)
|
3328
|
3372
|
3243
|
3255
|
F/G 0-56 Days
|
1.91
|
1.88
|
1.87
|
1.92
|
% Abnormal Legs2
|
37.0a
|
30.0ab
|
15.9b
|
26.0ab
|
% Incidence TD
|
15.5
|
16.0
|
6.8
|
14.2
|
Abdominal Fat, Wt. (g)
|
80ab
|
86a
|
77b
|
84ab
|
Chilled Carcass w/o Fat, Wt. (g)
|
2290
|
2301
|
2205
|
2237
|
% Live Wt.
|
68.8
|
68.2
|
68.0
|
68.7
|
Breast Meats4, Wt. (g)
|
568
|
555
|
530
|
550
|
% Live Wt.
|
17.1a
|
16.5b
|
16.3b
|
16.9a
|
1 From Renden et al. (1991). Ross x Cobb males.
2 Abnormal legs were characterized as twisted or bowed, or having swollen or scabby hocks. 3 Split breast following an 8-piece type cut. 4 Boneless-skinless major and minor muscles. |