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Registro Completo |
Biblioteca(s): |
Embrapa Gado de Leite. |
Data corrente: |
05/02/2014 |
Data da última atualização: |
06/02/2024 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
MONTEIRO, F. M.; MERCADANTE, M. E.; BARROS, C. M.; SATRAPA, R. A.; SILVA, J. A.; OLIVEIRA, L. Z.; SARAIVA, N. Z.; OLIVEIRA, C. S.; GARCIA, J. M. |
Afiliação: |
F. M. MONTEIRO, APTA / UNESP; M. E. MERCADANTE, APTA; C. M. BARROS, UNESP; R. A. SATRAPA, UNESP; J. A. SILVA, UNESP; L. Z. OLIVEIRA, UNESP; N. Z. SARAIVA, UNESP; CLARA SLADE OLIVEIRA, CNPGL; J. M. GARCIA, UNESP. |
Título: |
Reproductive tract development and puberty in two lines of Nellore heifers selected for postweaning weight. |
Ano de publicação: |
2013 |
Fonte/Imprenta: |
Theriogenology, v. 80, n. 1, p. 10-17, 2013. |
DOI: |
https://doi.org/10.1016/j.theriogenology.2013.02.013 |
Idioma: |
Inglês |
Conteúdo: |
The objective was to evaluate reproductive tract development (ovary and uterus) and onset of puberty in two lines of Nellore heifers (Bos indicus) selected for postweaning weight. A total of 123 heifers, including 46 from the control Nellore line (NeC) and 77 from the selection Nellore line (NeS) were used. Every 18 to 21 days from 12 to 24 months of age, average ovarian area (OVA), endometrial thickness (ETh), and diameter of the largest follicle in each ovary were evaluated (using transrectal ultrasonography), and body weight, hip height, and body condition score were measured. There were no differences between NeS and NeC heifers for ETh or OVA (P < 0.05). Genetic selection for higher postweaning weight had no negative influence on the onset of puberty, with 52% and 48% of NeC and NeS heifers, respectively, pubertal at 24 months of age (P = 0.49). Heifers that reached puberty at the end of the study were heavier (NeC, 296.9 vs. 276.7 kg; NeS, 343.5 vs. 327.9 kg; P < 0.01) and younger (NeC, 23.4 vs. 24.2 mo; NeS, 22.7 vs. 24.0 months; P < 0.01) than those that did not. Furthermore, heifers that were heavier at weaning reached puberty earlier. Pubertal heifers had a greater OVA (4.15 vs. 3.14 cm(2); P < 0.01) and ETh (12.15 vs. 9.93 mm; P < 0.01) than nonpubertal heifers. Taken together, OVA and ETh had positive effects (P < 0.01) on the onset of puberty and were suitable indicator traits of heifer sexual precocity in pasture management systems. However, selection for weight did not alter ovarian or endometrial development, or manifestation of puberty at 24 months of age. Among the growth traits studied, weaning weight and weight at puberty had significant positive effects on manifestation of first estrus. MenosThe objective was to evaluate reproductive tract development (ovary and uterus) and onset of puberty in two lines of Nellore heifers (Bos indicus) selected for postweaning weight. A total of 123 heifers, including 46 from the control Nellore line (NeC) and 77 from the selection Nellore line (NeS) were used. Every 18 to 21 days from 12 to 24 months of age, average ovarian area (OVA), endometrial thickness (ETh), and diameter of the largest follicle in each ovary were evaluated (using transrectal ultrasonography), and body weight, hip height, and body condition score were measured. There were no differences between NeS and NeC heifers for ETh or OVA (P < 0.05). Genetic selection for higher postweaning weight had no negative influence on the onset of puberty, with 52% and 48% of NeC and NeS heifers, respectively, pubertal at 24 months of age (P = 0.49). Heifers that reached puberty at the end of the study were heavier (NeC, 296.9 vs. 276.7 kg; NeS, 343.5 vs. 327.9 kg; P < 0.01) and younger (NeC, 23.4 vs. 24.2 mo; NeS, 22.7 vs. 24.0 months; P < 0.01) than those that did not. Furthermore, heifers that were heavier at weaning reached puberty earlier. Pubertal heifers had a greater OVA (4.15 vs. 3.14 cm(2); P < 0.01) and ETh (12.15 vs. 9.93 mm; P < 0.01) than nonpubertal heifers. Taken together, OVA and ETh had positive effects (P < 0.01) on the onset of puberty and were suitable indicator traits of heifer sexual precocity in pasture management systems. However, selection for weigh... Mostrar Tudo |
Palavras-Chave: |
Beef heifers; Endometrial thickness; Ovary; Ultrasound. |
Thesagro: |
Bos Indicus. |
Thesaurus Nal: |
puberty. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
Marc: |
LEADER 02639naa a2200301 a 4500 001 1978738 005 2024-02-06 008 2013 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1016/j.theriogenology.2013.02.013$2DOI 100 1 $aMONTEIRO, F. M. 245 $aReproductive tract development and puberty in two lines of Nellore heifers selected for postweaning weight.$h[electronic resource] 260 $c2013 520 $aThe objective was to evaluate reproductive tract development (ovary and uterus) and onset of puberty in two lines of Nellore heifers (Bos indicus) selected for postweaning weight. A total of 123 heifers, including 46 from the control Nellore line (NeC) and 77 from the selection Nellore line (NeS) were used. Every 18 to 21 days from 12 to 24 months of age, average ovarian area (OVA), endometrial thickness (ETh), and diameter of the largest follicle in each ovary were evaluated (using transrectal ultrasonography), and body weight, hip height, and body condition score were measured. There were no differences between NeS and NeC heifers for ETh or OVA (P < 0.05). Genetic selection for higher postweaning weight had no negative influence on the onset of puberty, with 52% and 48% of NeC and NeS heifers, respectively, pubertal at 24 months of age (P = 0.49). Heifers that reached puberty at the end of the study were heavier (NeC, 296.9 vs. 276.7 kg; NeS, 343.5 vs. 327.9 kg; P < 0.01) and younger (NeC, 23.4 vs. 24.2 mo; NeS, 22.7 vs. 24.0 months; P < 0.01) than those that did not. Furthermore, heifers that were heavier at weaning reached puberty earlier. Pubertal heifers had a greater OVA (4.15 vs. 3.14 cm(2); P < 0.01) and ETh (12.15 vs. 9.93 mm; P < 0.01) than nonpubertal heifers. Taken together, OVA and ETh had positive effects (P < 0.01) on the onset of puberty and were suitable indicator traits of heifer sexual precocity in pasture management systems. However, selection for weight did not alter ovarian or endometrial development, or manifestation of puberty at 24 months of age. Among the growth traits studied, weaning weight and weight at puberty had significant positive effects on manifestation of first estrus. 650 $apuberty 650 $aBos Indicus 653 $aBeef heifers 653 $aEndometrial thickness 653 $aOvary 653 $aUltrasound 700 1 $aMERCADANTE, M. E. 700 1 $aBARROS, C. M. 700 1 $aSATRAPA, R. A. 700 1 $aSILVA, J. A. 700 1 $aOLIVEIRA, L. Z. 700 1 $aSARAIVA, N. Z. 700 1 $aOLIVEIRA, C. S. 700 1 $aGARCIA, J. M. 773 $tTheriogenology$gv. 80, n. 1, p. 10-17, 2013.
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Embrapa Gado de Leite (CNPGL) |
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Biblioteca(s): |
Embrapa Clima Temperado. |
Data corrente: |
09/12/2016 |
Data da última atualização: |
09/12/2016 |
Tipo da produção científica: |
Artigo em Anais de Congresso |
Autoria: |
TUCHTENHAGEN, I. K.; LIMA, C. L. R. de; BAMBERG, A. L. |
Afiliação: |
ADILSON LUIS BAMBERG, CPACT. |
Título: |
Avaliação visual da qualidade estrutural de um planossolo sob diferentes sistemas de uso e manejo. |
Ano de publicação: |
2016 |
Fonte/Imprenta: |
In: REUNIÃO BRASILEIRA DE MANEJO E CONSERVAÇÃO DO SOLO E DA ÁGUA, 20., 2016, Foz do Iguaçu. O Solo sob ameaça: conexões necessárias ao manejo e conservação do solo e água: anais. Curitiba: SBCS; Londrina: IAPAR, 2016. |
Idioma: |
Português |
Palavras-Chave: |
Escore visual do solo; Qualidade do solo. |
Thesagro: |
Física do Solo. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/151551/1/Adilson-Luis-Bamberg-anais-rbmcsa-28-11-16.pdf
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Marc: |
LEADER 00711nam a2200157 a 4500 001 2058349 005 2016-12-09 008 2016 bl uuuu u00u1 u #d 100 1 $aTUCHTENHAGEN, I. K. 245 $aAvaliação visual da qualidade estrutural de um planossolo sob diferentes sistemas de uso e manejo.$h[electronic resource] 260 $aIn: REUNIÃO BRASILEIRA DE MANEJO E CONSERVAÇÃO DO SOLO E DA ÁGUA, 20., 2016, Foz do Iguaçu. O Solo sob ameaça: conexões necessárias ao manejo e conservação do solo e água: anais. Curitiba: SBCS; Londrina: IAPAR$c2016 650 $aFísica do Solo 653 $aEscore visual do solo 653 $aQualidade do solo 700 1 $aLIMA, C. L. R. de 700 1 $aBAMBERG, A. L.
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