Effects of sires with different weight gain potentials and varying planes of nutrition on growth of growing-finishing pigs
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The present study was performed to investigate the effects of two groups of sires with ‘medium’ and ‘high’ weightgain potentials (M-sires and H-sires, respectively) on growth of their progenies on varying planes of nutrition duringthe growing-finishing period. The ADG of the M-sires’ progeny was greater (P < 0.05) than that of the H-sires’ progeny(0.51 vs. 0.47 kg) during a 26- to 29-d early grower phase beginning from 55 d of age, but the opposite was true(0.66 vs. 0.72 kg) during the latter grower phase. Overall grower-phase ADG was greatest on the high plane of nutrition(H plane) followed by the medium (M) and low (L) planes (0.65, 0.61, and 0.51 kg, respectively; P < 0.05) in the M-sires’progeny, whereas in the H-sires’ progeny, ADG was greater on the H and M planes vs. L plane (0.63, 0.62, and 0.54 kg,respectively). The ADG of pigs on the M or H plane during the grower phase and switched to the H plane thereafter(M-to-H or H-to-H planes) was greater than that of pigs on the L-to-L planes (0.99 vs. 0.78 kg) during the early finisherphase in the M-sires’ progeny (P < 0.01). However, in the H-sires’ progeny, ADG of pigs on the L-to-L planes didnot differ from that of pigs on the M-to-M or H-to-M planes (0.94 vs. 0.96 kg). Results suggest that the H-to-H orH-to-M planes and M-to-M or M-to-L planes are optimal for maximal growth of the M- and H-sires’ progenies,respectively.
Abstract
The present study was performed to investigate the effects of two groups of sires with ‘medium’ and ‘high’ weightgain potentials (M-sires and H-sires, respectively) on growth of their progenies on varying planes of nutrition duringthe growing-finishing period. The ADG of the M-sires’ progeny was greater (P < 0.05) than that of the H-sires’ progeny(0.51 vs. 0.47 kg) during a 26- to 29-d early grower phase beginning from 55 d of age, but the opposite was true(0.66 vs. 0.72 kg) during the latter grower phase. Overall grower-phase ADG was greatest on the high plane of nutrition(H plane) followed by the medium (M) and low (L) planes (0.65, 0.61, and 0.51 kg, respectively; P < 0.05) in the M-sires’progeny, whereas in the H-sires’ progeny, ADG was greater on the H and M planes vs. L plane (0.63, 0.62, and 0.54 kg,respectively). The ADG of pigs on the M or H plane during the grower phase and switched to the H plane thereafter(M-to-H or H-to-H planes) was greater than that of pigs on the L-to-L planes (0.99 vs. 0.78 kg) during the early finisherphase in the M-sires’ progeny (P < 0.01). However, in the H-sires’ progeny, ADG of pigs on the L-to-L planes didnot differ from that of pigs on the M-to-M or H-to-M planes (0.94 vs. 0.96 kg). Results suggest that the H-to-H orH-to-M planes and M-to-M or M-to-L planes are optimal for maximal growth of the M- and H-sires’ progenies,respectively.
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