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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
09/04/1996 |
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Data da última atualização: |
03/04/2017 |
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Autoria: |
BOLTON, R. C.; FRAHM, R. R.; CASTREE, J. W.; COLEMAN, S. W. |
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Título: |
Genotype x environment interactions involving proportion of Brahman breeding and season of birth. I.calf growth to weaning. |
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Ano de publicação: |
1987 |
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Fonte/Imprenta: |
Journal Animal Science, v.65, n.1, p.42-47, 1987. |
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Idioma: |
Inglês |
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Conteúdo: |
Performance to weaning was evaluated on 489 spring-born and 416 fall-born crossbred calves of three proportion of Brahman breeding (0, 1/4 and 1/2 Brahman) over a 3-yr period. The calves were produced by appropriate matings of Angus (A), Hereford (H), Brahman (B), 1/2B-1/2A and 1/2B-1/2H bulls to Angus and Hereford cows. Interactions between proportion of Brahaman breeding and season of birth existed (P<.01) for all traits except birth weight. Birth weights of 1/4 and 1/2 Brahman calves were 1.4 and 3.8 kg heavier (P<.05), respectively, than O Brahman calves. Spring-born calves that were 1/4 and 1/2 Brahman outhained (P<.05) O Brahman calves 36 and 69 g/d, respectively and were 9 and 18 kg, respectively, heavier (P<.05) at weaning, whereas preweaning average daily gains and weaning weights were similar among fall-born crossbread calf groups. Among spring-born calves, 1/4 and 1/2 Brahman calves were 2.6 and 6.6 cm, respectively, taller (P<.05) than O Brahman calves, whereas amonf fall-born calves O and 1/4 Brahman calves had similar hip heights and 1/2 Brahman calves were 3.7 and 2.8 cm taller (P<.05) than O and 1/4 Brahman calves, respectively. Conformation and condition scores were similar for crossbred groups among spring-born calves, whereas conformation and condition scores decreased as proportion of Brahman breeding increased among fall-born calves. These data indicated that genotype x environment interactions are important in beef producxtion and increased proportions of Brahman breeding were advantagenous in a spring-calving program but not in a fall calving program. MenosPerformance to weaning was evaluated on 489 spring-born and 416 fall-born crossbred calves of three proportion of Brahman breeding (0, 1/4 and 1/2 Brahman) over a 3-yr period. The calves were produced by appropriate matings of Angus (A), Hereford (H), Brahman (B), 1/2B-1/2A and 1/2B-1/2H bulls to Angus and Hereford cows. Interactions between proportion of Brahaman breeding and season of birth existed (P<.01) for all traits except birth weight. Birth weights of 1/4 and 1/2 Brahman calves were 1.4 and 3.8 kg heavier (P<.05), respectively, than O Brahman calves. Spring-born calves that were 1/4 and 1/2 Brahman outhained (P<.05) O Brahman calves 36 and 69 g/d, respectively and were 9 and 18 kg, respectively, heavier (P<.05) at weaning, whereas preweaning average daily gains and weaning weights were similar among fall-born crossbread calf groups. Among spring-born calves, 1/4 and 1/2 Brahman calves were 2.6 and 6.6 cm, respectively, taller (P<.05) than O Brahman calves, whereas amonf fall-born calves O and 1/4 Brahman calves had similar hip heights and 1/2 Brahman calves were 3.7 and 2.8 cm taller (P<.05) than O and 1/4 Brahman calves, respectively. Conformation and condition scores were similar for crossbred groups among spring-born calves, whereas conformation and condition scores decreased as proportion of Brahman breeding increased among fall-born calves. These data indicated that genotype x environment interactions are important in beef producxtion and increased proportions ... Mostrar Tudo |
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Palavras-Chave: |
Calvong season; Cross breeding; Genotype environment interactiopn. |
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Thesagro: |
Gado de Corte; Produção. |
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Thesaurus Nal: |
beef cattle; Brahman. |
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Categoria do assunto: |
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Marc: |
LEADER 02320naa a2200241 a 4500
001 1788082
005 2017-04-03
008 1987 bl --- 0-- u #d
100 1 $aBOLTON, R. C.
245 $aGenotype x environment interactions involving proportion of Brahman breeding and season of birth. I.calf growth to weaning.
260 $c1987
520 $aPerformance to weaning was evaluated on 489 spring-born and 416 fall-born crossbred calves of three proportion of Brahman breeding (0, 1/4 and 1/2 Brahman) over a 3-yr period. The calves were produced by appropriate matings of Angus (A), Hereford (H), Brahman (B), 1/2B-1/2A and 1/2B-1/2H bulls to Angus and Hereford cows. Interactions between proportion of Brahaman breeding and season of birth existed (P<.01) for all traits except birth weight. Birth weights of 1/4 and 1/2 Brahman calves were 1.4 and 3.8 kg heavier (P<.05), respectively, than O Brahman calves. Spring-born calves that were 1/4 and 1/2 Brahman outhained (P<.05) O Brahman calves 36 and 69 g/d, respectively and were 9 and 18 kg, respectively, heavier (P<.05) at weaning, whereas preweaning average daily gains and weaning weights were similar among fall-born crossbread calf groups. Among spring-born calves, 1/4 and 1/2 Brahman calves were 2.6 and 6.6 cm, respectively, taller (P<.05) than O Brahman calves, whereas amonf fall-born calves O and 1/4 Brahman calves had similar hip heights and 1/2 Brahman calves were 3.7 and 2.8 cm taller (P<.05) than O and 1/4 Brahman calves, respectively. Conformation and condition scores were similar for crossbred groups among spring-born calves, whereas conformation and condition scores decreased as proportion of Brahman breeding increased among fall-born calves. These data indicated that genotype x environment interactions are important in beef producxtion and increased proportions of Brahman breeding were advantagenous in a spring-calving program but not in a fall calving program.
650 $abeef cattle
650 $aBrahman
650 $aGado de Corte
650 $aProdução
653 $aCalvong season
653 $aCross breeding
653 $aGenotype environment interactiopn
700 1 $aFRAHM, R. R.
700 1 $aCASTREE, J. W.
700 1 $aCOLEMAN, S. W.
773 $tJournal Animal Science$gv.65, n.1, p.42-47, 1987.
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Registro original: |
Embrapa Pantanal (CPAP) |
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