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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
09/10/1996 |
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Data da última atualização: |
03/04/2017 |
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Autoria: |
MAKARECHIAN, M.; MAHONE, J. P.; MAYNARD, E. G. |
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Título: |
Relationships between body weight, gain, scrotal circumference, libido score and semen production in beef bulls. |
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Ano de publicação: |
1983 |
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Fonte/Imprenta: |
Agriculture Forestry Bulletin - University of Albertoa, Special Issue, p.20-23, 1983. |
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Idioma: |
Inglês |
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Conteúdo: |
Sixty-six yearling and two year old bulls which were selected for breeding in 1980 and 1981 were used to study the effects of body weight (BW) and gain on scrotal circumference (SC), libido score and semen production and their interrelationships. The results indicated that: 1. Among the variables, preweaning average daily gain had the highest association with SC, indicating that proper preweaning growth was critical as far as testicular development was concerned. 2. Body weight at the start of breeding season had a linear and positive relationship with SC. Body weight explained a larger fraction of variation in SC in yearlings compared to the two year old bulls. 3. There BW at the start of breeding season and testicular consistency particularly among the two year old bulls. The bulls with larger than average SC tended to have softer than average testes. 4. The libido score was not consistent from to year, which was perhaps due to the subjectivity of the scoring procedure and the low repeatability of the trait. |
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Palavras-Chave: |
Bull; Production. |
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Thesagro: |
Gado de Corte; Produção; Reprodução; Touro. |
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Thesaurus Nal: |
beef cattle; reproduction. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01722naa a2200241 a 4500
001 1789840
005 2017-04-03
008 1983 bl --- 0-- u #d
100 1 $aMAKARECHIAN, M.
245 $aRelationships between body weight, gain, scrotal circumference, libido score and semen production in beef bulls.
260 $c1983
520 $aSixty-six yearling and two year old bulls which were selected for breeding in 1980 and 1981 were used to study the effects of body weight (BW) and gain on scrotal circumference (SC), libido score and semen production and their interrelationships. The results indicated that: 1. Among the variables, preweaning average daily gain had the highest association with SC, indicating that proper preweaning growth was critical as far as testicular development was concerned. 2. Body weight at the start of breeding season had a linear and positive relationship with SC. Body weight explained a larger fraction of variation in SC in yearlings compared to the two year old bulls. 3. There BW at the start of breeding season and testicular consistency particularly among the two year old bulls. The bulls with larger than average SC tended to have softer than average testes. 4. The libido score was not consistent from to year, which was perhaps due to the subjectivity of the scoring procedure and the low repeatability of the trait.
650 $abeef cattle
650 $areproduction
650 $aGado de Corte
650 $aProdução
650 $aReprodução
650 $aTouro
653 $aBull
653 $aProduction
700 1 $aMAHONE, J. P.
700 1 $aMAYNARD, E. G.
773 $tAgriculture Forestry Bulletin - University of Albertoa, Special Issue, p.20-23, 1983.
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Registro original: |
Embrapa Pantanal (CPAP) |
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