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Biblioteca (s) : |
INIA Las Brujas. |
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Fecha : |
21/02/2014 |
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Actualizado : |
04/02/2020 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Autor : |
RAVAGNOLO, O.; MISZTAL, I. |
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Afiliación : |
OLGA RAVAGNOLO GUMILA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; I. MISZTAL, Dept. of Animal and Dairy Science, University of Georgia, Athens, GA, United States. |
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Título : |
Studies on genetics of heat tolerance in dairy cattle with reduced weather information via cluster analysis. |
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Fecha de publicación : |
2002 |
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Fuente / Imprenta : |
Journal of Dairy Science, June 2002, Volume 85, Issue 6, Pages 1586-1589. OPEN ACCESS. DOI: https://doi.org/10.3168/jds.S0022-0302(02)74228-8 |
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ISSN : |
0022-0302 |
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DOI : |
10.3168/jds.S0022-0302(02)74228-8 |
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Idioma : |
Inglés |
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Notas : |
Article history: |
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Contenido : |
ABSTRACT.
The objective of this study was to explore the possibility of reducing the number of weather stations for studies on genetics of heat tolerance in dairy cattle. The similarity of information from 21 Georgia weather stations was analyzed by cluster analysis. Two major clusters have been found, separating Georgia along the NE and SW line. One weather station was selected for each of the clusters based on the minimal distance to all the remaining weather stations and on completeness of the weather information. The production dataset consisted of 114,751 first-parity test-day records for milk on 14,297 Holsteins from 120 herds in Georgia. Analyses using a model for daily milk yield with temperature-humidity index classes and several other fixed effects showed no increase in error sum of squares when using only two weather stations. The threshold of heat stress was different for each of the two regions but the rate of decline after the threshold was similar. After accounting for different thresholds, the genetic component of heat tolerance for milk was higher with the two-station model. Genetic studies on or evaluation for heat tolerance based on information from a few carefully selected weather stations can be as accurate as those based on information from numerous such stations. |
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Palabras claves : |
Dairy; Heat stress; Random regressions. |
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Asunto categoría : |
L01 Ganadería |
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URL : |
https://www.journalofdairyscience.org/article/S0022-0302(02)74228-8/pdf
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Marc : |
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001 1012856
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008 2002 bl uuuu u00u1 u #d
022 $a0022-0302
024 7 $a10.3168/jds.S0022-0302(02)74228-8$2DOI
100 1 $aRAVAGNOLO, O.
245 $aStudies on genetics of heat tolerance in dairy cattle with reduced weather information via cluster analysis.$h[electronic resource]
260 $c2002
500 $aArticle history:
520 $aABSTRACT. The objective of this study was to explore the possibility of reducing the number of weather stations for studies on genetics of heat tolerance in dairy cattle. The similarity of information from 21 Georgia weather stations was analyzed by cluster analysis. Two major clusters have been found, separating Georgia along the NE and SW line. One weather station was selected for each of the clusters based on the minimal distance to all the remaining weather stations and on completeness of the weather information. The production dataset consisted of 114,751 first-parity test-day records for milk on 14,297 Holsteins from 120 herds in Georgia. Analyses using a model for daily milk yield with temperature-humidity index classes and several other fixed effects showed no increase in error sum of squares when using only two weather stations. The threshold of heat stress was different for each of the two regions but the rate of decline after the threshold was similar. After accounting for different thresholds, the genetic component of heat tolerance for milk was higher with the two-station model. Genetic studies on or evaluation for heat tolerance based on information from a few carefully selected weather stations can be as accurate as those based on information from numerous such stations.
653 $aDairy
653 $aHeat stress
653 $aRandom regressions
700 1 $aMISZTAL, I.
773 $tJournal of Dairy Science, June 2002, Volume 85, Issue 6, Pages 1586-1589. OPEN ACCESS. DOI: https://doi.org/10.3168/jds.S0022-0302(02)74228-8
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Registro original : |
INIA Las Brujas (LB) |
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Registro completo
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Biblioteca (s) : |
INIA La Estanzuela. |
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Fecha actual : |
21/02/2014 |
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Actualizado : |
14/01/2019 |
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Tipo de producción científica : |
Documentos |
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Autor : |
METHOL, M.; SOUTO, G. |
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Afiliación : |
MARIA METHOL, MGAP (MINISTERIO DE GANADERIA,AGRICULTURA Y PESCA); OPYPA (OFICINA DE PROGRAMACION Y POLITICA AGROPECUARIA), URUGUAY.; GONZALO SOUTO, MGAP (MINISTERIO DE GANADERIA,AGRICULTURA Y PESCA); OPYPA (OFICINA DE PROGRAMACION Y POLITICA AGROPECUARIA), URUGUAY. |
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Título : |
Granos forrajeros : situación y perspectivas. |
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Fecha de publicación : |
2000 |
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Fuente / Imprenta : |
ln: INIA La Estanzuela ;Jornada de Cultivos de Verano, La Estanzuela, Colonia, 3 ago 2000:tecnología de producción de cultivos y pasturas bajo riego. La Estanzuela: INIA, 2000. |
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Páginas : |
p. 79-85. |
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Serie : |
(Serie Actividades de Difusión; 227). |
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Idioma : |
Español |
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Thesagro : |
FORRAJERAS. |
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Asunto categoría : |
-- |
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URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/12272/1/UY.INIA.SAD.2000.n.227.p.79-85-Methol.pdf
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Marc : |
LEADER 00561naa a2200157 a 4500
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008 2000 bl uuuu u00u1 u #d
100 1 $aMETHOL, M.
245 $aGranos forrajeros$bsituación y perspectivas.
260 $c2000
300 $ap. 79-85.
490 $a(Serie Actividades de Difusión; 227).
650 $aFORRAJERAS
700 1 $aSOUTO, G.
773 $tln: INIA La Estanzuela ;Jornada de Cultivos de Verano, La Estanzuela, Colonia, 3 ago 2000:tecnología de producción de cultivos y pasturas bajo riego. La Estanzuela: INIA, 2000.
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INIA La Estanzuela (LE) |
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