Agriculture Reference
In-Depth Information
Table 10.6.
Infl uence of corn rootworm protected maize (MON863) on slaughtering data of feedlot steers
(initial body weight: 457 kg; duration of experiment: 102 days). (From Berger
et al
., 2003.)
Commercial
control
RX740
Commercial
control
DK647
Isogenic control
RX670
Transgenic maize
MON863
Parameter
Body weight gain
(kg/day)
1.39
1.49
1.53
1.49
Carcass weight (kg)
367
374
377
374
Marbling score
484
470
489
493
Musculus
longissimus dorsi
area and 12th rib
(cm
2
)
97.3
99.5
95.6
97.2
Fat (cm)
0.85
0.89
0.99
0.92
Yield grade
1.9
1.9
2.3
2.1
Table 10.7.
Infl uence of RR maize (GA21 or NK603) in rations of fi nishing steers on parameters of meat
quality and muscle composition (Experiment 1: 75%; Experiment 2: 73%; Experiment 3: 79.5% maize in
fi nishing diet; 92, 94 and 144 days feeding in Experiments 1, 2 and 3, respectively). (From Erickson
et al
.,
2003.)
Transgenic maize
(Experiment 1: GA21;
Experiments 2 and 3:
NK603)
Commercial
1
Commercial
2
Parameter
Isogenic control
Final body weight (kg):
Experiment 1
Experiment 2
Experiment 3
561
565
585
575
570
575
571
564
590
562
566
577
Carcass weight (kg):
Experiment 1
Experiment 2
Experiment 3
347
346
349
356
348
364
354
345
371
348
346
364
Marbling score:
Experiment 1
Experiment 2
Experiment 3
492
545
533
517
555
544
485
559
539
517
549
541
Muscle composition
a
(moisture %):
Experiment 1
Experiment 2
Experiment 3
72.3
71.8
75.6
72.1
71.7
75.1
73.5
71.4
75.2
72.3
71.7
76.2
Protein (%):
Experiment 1
Experiment 2
Experiment 3
22.3
23.8
20.5
22.0
23.9
20.0
22.1
24.0
20.2
22.0
23.7
19.6
Fat (%):
Experiment 1
Experiment 2
Experiment 3
3.9
4.0
3.4
4.0
4.1
3.9
3.5
4.6
3.8
4.1
4.3
3.5
Note
:
a
Experiments 1 and 2:
Musculus longissimus dorsi
; Experiment 3: Brachiocephalicus muscle.
