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 | Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
01/08/1992 |
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Data da última atualização: |
05/06/2025 |
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Autoria: |
JACKSON, N.; NAY, T.; TURNER, H. N.; NEWTON, T. H. |
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Afiliação: |
TURNER H NEWTON. |
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Título: |
Response to selection in Australian Merino sheep. VII. Phenotypic and genetic parameters for some wool follice characteristics and their correlaction with wool and body traits. |
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Ano de publicação: |
1975 |
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Fonte/Imprenta: |
Australian Journal of Agricultural Research, v. 26, n. 5, p. 937-957, 1975. |
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DOI: |
https://doi.org/10.1071/AR9750937 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Four numerical characteristics-follicle depth, follicle curvature, number of follicles per unit area of skin, and ratio of number of secondary to number of primary follicles-describing the size, shape, and arrangement of wool follicles have been measured in Peppin Merino sheep at 4-5 months (weaning), 15-16 months (two-tooth shearing) and at later ages ranging from 2 1/2 to 7 1/2 years. Estimates of their repeatability, heritability and phenotypic, genetic, and environmental correlations with 10 wool and body characteristics are reported. All four follicle characteristics were found to be highly inherited and sufficiently correlated with wool characteristics to be of interest to both the wool biologist and the sheep breeder. Fixed environmental effects influenced the expression of some follicle characteristics, while others, notably follicle curvature at any age, were unaffected, and therefore potentially more useful as practical selection aids. Groups of sheep selected for clean wool weight with control of (i) fibre diameter and wrinkle score, and (li) crimp frequency and wrinkle score, exhibited changes in the four follicle characteristics, which agreed with what the genetic correlation estimates would predict. The role of follicle characteristics in the biology of genetic control of wool growth is portrayed by fitting causal models invoking follicle characteristics as intermediates between the gene and the wool character. The analysis separates three independent genetic control systems, the identity of which corresponds closely to factors postulated in previous theoretical studies. MenosAbstract: Four numerical characteristics-follicle depth, follicle curvature, number of follicles per unit area of skin, and ratio of number of secondary to number of primary follicles-describing the size, shape, and arrangement of wool follicles have been measured in Peppin Merino sheep at 4-5 months (weaning), 15-16 months (two-tooth shearing) and at later ages ranging from 2 1/2 to 7 1/2 years. Estimates of their repeatability, heritability and phenotypic, genetic, and environmental correlations with 10 wool and body characteristics are reported. All four follicle characteristics were found to be highly inherited and sufficiently correlated with wool characteristics to be of interest to both the wool biologist and the sheep breeder. Fixed environmental effects influenced the expression of some follicle characteristics, while others, notably follicle curvature at any age, were unaffected, and therefore potentially more useful as practical selection aids. Groups of sheep selected for clean wool weight with control of (i) fibre diameter and wrinkle score, and (li) crimp frequency and wrinkle score, exhibited changes in the four follicle characteristics, which agreed with what the genetic correlation estimates would predict. The role of follicle characteristics in the biology of genetic control of wool growth is portrayed by fitting causal models invoking follicle characteristics as intermediates between the gene and the wool character. The analysis separates three independent... Mostrar Tudo |
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Palavras-Chave: |
Wool quality. |
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Thesagro: |
Melhoramento; Ovino; Seleção. |
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Thesaurus Nal: |
Animal genetics; Body weight; Genetic correlation; Heritability; Livestock; Repeatability; Sheep. |
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Categoria do assunto: |
G Melhoramento Genético |
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Marc: |
LEADER 02542naa a2200301 a 4500
001 1521987
005 2025-06-05
008 1975 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1071/AR9750937$2DOI
100 1 $aJACKSON, N.
245 $aResponse to selection in Australian Merino sheep. VII. Phenotypic and genetic parameters for some wool follice characteristics and their correlaction with wool and body traits.
260 $c1975
520 $aAbstract: Four numerical characteristics-follicle depth, follicle curvature, number of follicles per unit area of skin, and ratio of number of secondary to number of primary follicles-describing the size, shape, and arrangement of wool follicles have been measured in Peppin Merino sheep at 4-5 months (weaning), 15-16 months (two-tooth shearing) and at later ages ranging from 2 1/2 to 7 1/2 years. Estimates of their repeatability, heritability and phenotypic, genetic, and environmental correlations with 10 wool and body characteristics are reported. All four follicle characteristics were found to be highly inherited and sufficiently correlated with wool characteristics to be of interest to both the wool biologist and the sheep breeder. Fixed environmental effects influenced the expression of some follicle characteristics, while others, notably follicle curvature at any age, were unaffected, and therefore potentially more useful as practical selection aids. Groups of sheep selected for clean wool weight with control of (i) fibre diameter and wrinkle score, and (li) crimp frequency and wrinkle score, exhibited changes in the four follicle characteristics, which agreed with what the genetic correlation estimates would predict. The role of follicle characteristics in the biology of genetic control of wool growth is portrayed by fitting causal models invoking follicle characteristics as intermediates between the gene and the wool character. The analysis separates three independent genetic control systems, the identity of which corresponds closely to factors postulated in previous theoretical studies.
650 $aAnimal genetics
650 $aBody weight
650 $aGenetic correlation
650 $aHeritability
650 $aLivestock
650 $aRepeatability
650 $aSheep
650 $aMelhoramento
650 $aOvino
650 $aSeleção
653 $aWool quality
700 1 $aNAY, T.
700 1 $aTURNER, H. N.
700 1 $aNEWTON, T. H.
773 $tAustralian Journal of Agricultural Research$gv. 26, n. 5, p. 937-957, 1975.
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Embrapa Caprinos e Ovinos (CNPC) |
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| Registros recuperados : 40 | |
| 5. |  | BESTER, A. U.; HÜBNER, V.; SOUZA, V. F. de; HAERTER, J. A.; CASTRO, C. M. Desempenho de genótipos de batata frente ao estresse por altas temperaturas In: SEMANA INTEGRADA UFPEL, 10.; ENCONTRO DE PÓS-GRADUAÇÃO, 16., 2024, Pelotas. Anais... Pelotas: UFPEL, 2024. X SIIEPE. XXVI ENPÓS.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Clima Temperado. |
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| 9. | | SOUZA, V. F. de; WOLTER, D. D.; FERREIRA, J. K.; AZEVEDO, F. Q.; EMYGDIO, B. M.; PEREIRA, A. da S. Aptidão de uso de clones de batata. In: SEMANA INTEGRADA UFPEL, 9.; CONGRESSO DE INICIAÇÃO CIENTÍFICA, 32., 2023, Pelotas. Anais [eletrônicos...]. Pelotas: UFPEL, 2023.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Clima Temperado. |
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| 12. | | SILVA, G. O. da S.; PEREIRA, A. da S.; SOUZA, V. Q. de; CARVALHO, F. de C.; VIEIRA, E. A. Capacidade de combinação multivariada para caracteres de tubérculo em gerações iniciais de seleção em batata. Ciência Rural, Santa Maria, v. 38, n. 2, p. 321-325, 2008.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Internacional - A |
| Biblioteca(s): Embrapa Cerrados; Embrapa Clima Temperado. |
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| 13. | | SILVA, G. O. da; PEREIRA, A. da S.; SOUZA, V. Q. de; CARVALHO, F. I. F. de; NETO, R. F. Estimativa de capacidades de combinação em gerações iniciais de seleção de batata. Horticultura Brasileira, Brasilia, DF, n. 1, p. 17-21 jan/mar, 2009.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Clima Temperado. |
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| 15. | | SOUZA, V. Q. de; PEREIRA, A. da S.; SILVA, G. O. da; NETO, R. F.; OLIVEIRA, A. C. de. Consistência de dois métodos de análise de estabilidade em batata. Ciência Rural, Santa Maria, v. 37, n. 3, p. 656-661, maio/jun, 2007.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Nacional - A |
| Biblioteca(s): Embrapa Clima Temperado. |
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| 16. | | SILVA, G. O. da; PEREIRA, A. da S.; SOUZA, V. Q. de; CARVALHO, F. I. F. de; FRITSCHE NETO. R. Seleção para caracteres componentes de aparência e rendimento de tubérculos em plântulas de batata. Horticultura Brasileira, Brasilia, DF, v. 26, n. 3, p. 325-329, 2008.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Nacional - A |
| Biblioteca(s): Embrapa Clima Temperado. |
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| 17. | | SILVA, G. O.; PEREIRA, A. da S.; SOUZA, V. Q.; CARVALHO, F. I. F.; FRITSCHE NETO, R. Seleção para caracteres fenotípicos de tubérculos nas primeiras gerações em batata. Revista Ceres, Viçosa, v. 55, n. 3, p. 168-172, jun. 2008.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Nacional - A |
| Biblioteca(s): Embrapa Clima Temperado; Embrapa Hortaliças. |
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| 18. | | SOUZA, V. F. de; HÜBNER, V.; BEASTER, A. U.; FRANCA, T. C. de O.; CASTRO, C. M. Seleção assistida por marcadores moleculares para resistência ao vírus y em batata. In: SEMANA INTEGRADA UFPEL, 10.; CONGRESSO DE INICIAÇÃO CIENTÍFICA, 33., 2024, Pelotas. Anais... Pelotas: UFPEL, 2024. X SIIEPE. XXXIII CIC.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Clima Temperado. |
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| 19. | | SILVA, G. O. da; PEREIRA, A. P. da; SOUZA, V. Q. de; CARVALHO, F. I. F. de; NEY, V. G. Influência da distância entre genitores de batata nas estimativas de capacidades de combinação em gerações iniciais de seleção. Magistra, Cruz das Almas, v. 19, n. 3, p. 224-233, jul/set., 2007.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Nacional - B |
| Biblioteca(s): Embrapa Clima Temperado. |
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| Registros recuperados : 40 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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