| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Pantanal. |
|
Data corrente: |
06/05/1998 |
|
Data da última atualização: |
27/03/2017 |
|
Autoria: |
LUNSTRA, D. D.; GREGORY, K. E.; CUNDIFF, L. V. |
|
Título: |
Heritability estimates and adjustment factors for the effects of bull age and age of dam on yearling testicular size in breeds of bulls. |
|
Ano de publicação: |
1988 |
|
Fonte/Imprenta: |
Theriogenology, v.30, n.1, p.127-136, July, 1988. |
|
Idioma: |
Inglês |
|
Conteúdo: |
Scrotal circumference, testicular length and body wight were measured in 3,090 yearling bulls of 12 breed groups finishing growth performance tests during a 5 yr period. Breeds were Limousin, Hereford, Charolais, Angus, Red Poll, Simmental, Pinzgauer, Brown Swiss, Gelbvieh and three crossbred breed groups. All bulls were born during a 60-d calving season starding in late March of each year and were subjected to similar management and environmental influences during the study. The bulls were the progeny of 307 sires averaging approximately 26 sires per breed group an 10 sons per sire. Breed group, sire within breed group, year and age-of-dam effects were important (P<0.01) for all testicular traits at both a constant age (354 d) and constant body wight (418 kg). Paternal half-sib estimates of heritability were 0.41+-0.06 for age-constant scrotal circumference, 0.34+-0.06 for testicular length and 0.37+-0.06 for calculated paired testicular volume, respectively. Age-constant genetic correlations between yearling body wight and testicular traits were small, indicating that testicular growth and body growth rates are largely independent, regardless of breed. Testicular size of bulls from 2-yr-old dams was smaller than that of bulls from older dams. Most of these age-of-dam effects on testicular size were removed when testicular size was adjusted for the effects of body weight, suggesting that age-of-dam effects on testicular size are primarily the result of age-of-dam effects on body weight. Age adjustment factors for yearling scrotal circumference did not differ (P>0.20) among breed groups and averaged 0.032 cm per day of age. Adjustment factors for age of dam were +1.3, +0.8, +0.4, and +0.0 cm for sons of 2-, 3-, 4- and 5-yr-old dams, respectively. MenosScrotal circumference, testicular length and body wight were measured in 3,090 yearling bulls of 12 breed groups finishing growth performance tests during a 5 yr period. Breeds were Limousin, Hereford, Charolais, Angus, Red Poll, Simmental, Pinzgauer, Brown Swiss, Gelbvieh and three crossbred breed groups. All bulls were born during a 60-d calving season starding in late March of each year and were subjected to similar management and environmental influences during the study. The bulls were the progeny of 307 sires averaging approximately 26 sires per breed group an 10 sons per sire. Breed group, sire within breed group, year and age-of-dam effects were important (P<0.01) for all testicular traits at both a constant age (354 d) and constant body wight (418 kg). Paternal half-sib estimates of heritability were 0.41+-0.06 for age-constant scrotal circumference, 0.34+-0.06 for testicular length and 0.37+-0.06 for calculated paired testicular volume, respectively. Age-constant genetic correlations between yearling body wight and testicular traits were small, indicating that testicular growth and body growth rates are largely independent, regardless of breed. Testicular size of bulls from 2-yr-old dams was smaller than that of bulls from older dams. Most of these age-of-dam effects on testicular size were removed when testicular size was adjusted for the effects of body weight, suggesting that age-of-dam effects on testicular size are primarily the result of age-of-dam effects on... Mostrar Tudo |
|
Palavras-Chave: |
Adjustment factors; Bovine; Breed; Bull age; Heritariedade; Testes size; Yearling. |
|
Thesagro: |
Bovino; Criação; Reprodução; Touro. |
|
Thesaurus Nal: |
heritability; reproduction. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 02598naa a2200301 a 4500
001 1792353
005 2017-03-27
008 1988 bl --- 0-- u #d
100 1 $aLUNSTRA, D. D.
245 $aHeritability estimates and adjustment factors for the effects of bull age and age of dam on yearling testicular size in breeds of bulls.
260 $c1988
520 $aScrotal circumference, testicular length and body wight were measured in 3,090 yearling bulls of 12 breed groups finishing growth performance tests during a 5 yr period. Breeds were Limousin, Hereford, Charolais, Angus, Red Poll, Simmental, Pinzgauer, Brown Swiss, Gelbvieh and three crossbred breed groups. All bulls were born during a 60-d calving season starding in late March of each year and were subjected to similar management and environmental influences during the study. The bulls were the progeny of 307 sires averaging approximately 26 sires per breed group an 10 sons per sire. Breed group, sire within breed group, year and age-of-dam effects were important (P<0.01) for all testicular traits at both a constant age (354 d) and constant body wight (418 kg). Paternal half-sib estimates of heritability were 0.41+-0.06 for age-constant scrotal circumference, 0.34+-0.06 for testicular length and 0.37+-0.06 for calculated paired testicular volume, respectively. Age-constant genetic correlations between yearling body wight and testicular traits were small, indicating that testicular growth and body growth rates are largely independent, regardless of breed. Testicular size of bulls from 2-yr-old dams was smaller than that of bulls from older dams. Most of these age-of-dam effects on testicular size were removed when testicular size was adjusted for the effects of body weight, suggesting that age-of-dam effects on testicular size are primarily the result of age-of-dam effects on body weight. Age adjustment factors for yearling scrotal circumference did not differ (P>0.20) among breed groups and averaged 0.032 cm per day of age. Adjustment factors for age of dam were +1.3, +0.8, +0.4, and +0.0 cm for sons of 2-, 3-, 4- and 5-yr-old dams, respectively.
650 $aheritability
650 $areproduction
650 $aBovino
650 $aCriação
650 $aReprodução
650 $aTouro
653 $aAdjustment factors
653 $aBovine
653 $aBreed
653 $aBull age
653 $aHeritariedade
653 $aTestes size
653 $aYearling
700 1 $aGREGORY, K. E.
700 1 $aCUNDIFF, L. V.
773 $tTheriogenology$gv.30, n.1, p.127-136, July, 1988.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Pantanal (CPAP) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Registros recuperados : 2 | |
| 1. |  | BENVENUTTI, L.; ROVARIS, B. C.; OLIVEIRA, D. DE; RIBEIRO, P. R. V.; BRITO, E. S. de; ZIELINSKI, A. A. F. A water-based ultrasound-assisted extraction system to obtain natural blue colorant from Genipap (Genipa americana L.). Food Chemistry Advances, v. 4, June, 100704, 2024.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 2 |
| Biblioteca(s): Embrapa Agroindústria Tropical; Embrapa Alimentos e Territórios. |
|    |
| 2. | | BACH, F.; ZIELINSKI, A. A.; HELM, C. V.; MACIEL, G. M.; PEDRO, A. C.; STAFUSSA, A. P.; ÁVILA, S.; HAMINIUK, C. H. I. Bio compounds of edible mushrooms: in vitro antioxidant and antimicrobial activities. LWT. Food Science and Technology, v. 107, p. 214-220, June 2019.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Florestas. |
| |
| Registros recuperados : 2 | |
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
