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Biblioteca (s) : |
INIA Las Brujas. |
Fecha : |
21/02/2014 |
Actualizado : |
03/10/2019 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
Autor : |
RAVAGNOLO, O.; MISZTAL, I. |
Afiliación : |
OLGA RAVAGNOLO GUMILA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; I. MISZTAL, University of Georgia, United States. |
Título : |
Effect of heat stress on nonreturn rate in holstein cows: Genetic analyses. |
Fecha de publicación : |
2002 |
Fuente / Imprenta : |
Journal of Dairy Science, 2002, 85 (11): 3092-3100. |
ISSN : |
0022-0302 |
DOI : |
10.3168/jds.S0022-0302(02)74396-8 |
Idioma : |
Inglés |
Notas : |
Article history: Received August 13, 2001. / Accepted October 16, 2002. |
Contenido : |
ABSTRACT.
The genetic component in heat tolerance for nonreturn rate in Holsteins was estimated using an animal linear model augmented by a random regression on a temperature-humidity index (THI). Data consisted of 18,059 nonreturn rates at 45, 60, and 90 d after insemination and 81,674 first-parity test-day milk yields from 78 herds in Florida. The THI on the day of insemination or test day was added to each record. Only first-insemination records were used. The model for nonreturn rate included the effects of herd-year-season, age, days in milk, milk yield, THI as a covariable, regular additive effect, and random regression on THI for heat-tolerance additive effect. With a single-trait model, heritability estimates for NR45, NR60, and NR90 at THI = 70 for first-lactation cows were 0.006, 0.014, and 0.053, respectively. Genetic correlation between regular NR90 and heat tolerance was -0.95. A bivariate analysis for NR90 and test-day milk production yielded a correlation between regular merit and heat tolerance for NR90 of -0.35, substantially lower than by the univariate model, indicating a bias in the univariate estimates caused by ignored selection. The regular genetic correlation between NR90 and milk yield was -0.41. Genetic correlation between heat tolerance for NR90 and heat tolerance for milk yield was -0.04, indicating the need to separate selection.
© Copyright 2017 Elsevier B.V., All rights reserved. |
Palabras claves : |
Dairy cattle; Heat stress; Nonreturn rate; Temperature-humidity index. |
Asunto categoría : |
-- |
URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/13409/1/Jr.Dairy-Science.-2002.-1-s2.0-S0022030202743968-main.pdf
https://www.journalofdairyscience.org/article/S0022-0302(02)74396-8/pdf
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Marc : |
LEADER 02135naa a2200217 a 4500 001 1012855 005 2019-10-03 008 2002 bl uuuu u00u1 u #d 022 $a0022-0302 024 7 $a10.3168/jds.S0022-0302(02)74396-8$2DOI 100 1 $aRAVAGNOLO, O. 245 $aEffect of heat stress on nonreturn rate in holstein cows$bGenetic analyses.$h[electronic resource] 260 $c2002 500 $aArticle history: Received August 13, 2001. / Accepted October 16, 2002. 520 $aABSTRACT. The genetic component in heat tolerance for nonreturn rate in Holsteins was estimated using an animal linear model augmented by a random regression on a temperature-humidity index (THI). Data consisted of 18,059 nonreturn rates at 45, 60, and 90 d after insemination and 81,674 first-parity test-day milk yields from 78 herds in Florida. The THI on the day of insemination or test day was added to each record. Only first-insemination records were used. The model for nonreturn rate included the effects of herd-year-season, age, days in milk, milk yield, THI as a covariable, regular additive effect, and random regression on THI for heat-tolerance additive effect. With a single-trait model, heritability estimates for NR45, NR60, and NR90 at THI = 70 for first-lactation cows were 0.006, 0.014, and 0.053, respectively. Genetic correlation between regular NR90 and heat tolerance was -0.95. A bivariate analysis for NR90 and test-day milk production yielded a correlation between regular merit and heat tolerance for NR90 of -0.35, substantially lower than by the univariate model, indicating a bias in the univariate estimates caused by ignored selection. The regular genetic correlation between NR90 and milk yield was -0.41. Genetic correlation between heat tolerance for NR90 and heat tolerance for milk yield was -0.04, indicating the need to separate selection. © Copyright 2017 Elsevier B.V., All rights reserved. 653 $aDairy cattle 653 $aHeat stress 653 $aNonreturn rate 653 $aTemperature-humidity index 700 1 $aMISZTAL, I. 773 $tJournal of Dairy Science, 2002, 85 (11): 3092-3100.
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Registro original : |
INIA Las Brujas (LB) |
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Registro completo
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Biblioteca (s) : |
INIA Tacuarembó. |
Fecha actual : |
21/02/2014 |
Actualizado : |
22/08/2017 |
Autor : |
MONTOSSI, F.; SAN JULIÁN, R.; RISSO, D.; BERRETTA, E.J.; RÍOS, M. |
Afiliación : |
FABIO MARCELO MONTOSSI PORCHILE, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; ROBERTO SAN JULIAN SANCHEZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; DIEGO FERNANDO RISSO RIET, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; ELBIO JOAQUIN BERRETTA CARVALLO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
Título : |
Alternativas tecnológicas para la intensificación de la producción de carne ovina en sistemas ganaderos del basalto: producción de corderos pesados. |
Fecha de publicación : |
1999 |
Fuente / Imprenta : |
Montevideo (Uruguay): INIA, 1999. |
Páginas : |
p. 37-47 |
Idioma : |
Español |
Thesagro : |
BASALTO; OVINOS; PRODUCCION DE CARNE. |
Asunto categoría : |
L01 Ganadería |
Marc : |
LEADER 00614naa a2200205 a 4500 001 1020827 005 2017-08-22 008 1999 bl uuuu u00u1 u #d 100 1 $aMONTOSSI, F. 245 $aAlternativas tecnológicas para la intensificación de la producción de carne ovina en sistemas ganaderos del basalto$bproducción de corderos pesados. 260 $c1999 300 $ap. 37-47 650 $aBASALTO 650 $aOVINOS 650 $aPRODUCCION DE CARNE 700 1 $aSAN JULIÁN, R. 700 1 $aRISSO, D. 700 1 $aBERRETTA, E.J. 700 1 $aRÍOS, M. 773 $tMontevideo (Uruguay): INIA, 1999.
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