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Biblioteca (s) : |
INIA Las Brujas. |
Fecha : |
21/02/2014 |
Actualizado : |
18/06/2019 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
Autor : |
SÁNCHEZ, J.P.; MISZTAL, I.; AGUILAR, I.; ZUMBACH, B.; REKAYA, R. |
Afiliación : |
J. P. SÁNCHEZ, Departamento de Producción animal, Universidad de León, Spain; I. MISZTAL, Animal and Dairy Science Department, University of Georgia, United States; IGNACIO AGUILAR GARCIA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; B. ZUMBACH, Norsvin, Norway; R. REKAYA, Animal and Dairy Science Department, University of Georgia, United States. |
Título : |
Genetic determination of the onset of heat stress on daily milk production in the US Holstein cattle. |
Fecha de publicación : |
2009 |
Fuente / Imprenta : |
Journal of Dairy Science, 2009, 92 (8): 4035-4045. OPEN ACCESS. |
ISSN : |
0022-0302 |
DOI : |
10.3168/jds.2008-1626 |
Idioma : |
Inglés |
Notas : |
Article history: Received August 12, 2008. // Accepted March 18, 2009. |
Contenido : |
ABSTRACT.
Existence of individual variation in the onset of heat stress for daily milk yield of dairy cows was assessed. Data included 353,376 test-day records of 38,383 first-parity Holsteins from a random sample of US herds. Three hierarchical models were investigated. Model 1 inferred the value of a temperature-humidity index (THI) at which mean yield began to decline as well as the extent of that decline. Model 2 assumed individual variation in yield decline beyond a common THI threshold. Model 3 additionally assumed individual variation for the onset of heat stress. Deviance information criteria indicated the superiority of model 3 over model 2. For model 2, genetic correlation between milk yield in the absence of heat stress and the THI threshold for heat stress was -0.4 (0.11) [marginal posterior mean (marginal posterior standard deviation)]. For model 3, genetic correlations were -0.53 (0.05) between milk yield and THI threshold and -0.62 (0.08) between milk yield and yield decay beyond the THI threshold. Total standard deviation (sum of additive genetic and permanent envi-ronmental standard deviations) for the THI threshold was 3.95 (0.06), and more than half of that variation had an additive genetic origin [56% (5%)]. Because of the high genetic correlation [0.95 (0.03)] between yield decay and THI threshold with model 3, using only one of them as a selection criterion for heat tolerance would modify the other in the desired direction.
© american Dairy Science association, 2009. MenosABSTRACT.
Existence of individual variation in the onset of heat stress for daily milk yield of dairy cows was assessed. Data included 353,376 test-day records of 38,383 first-parity Holsteins from a random sample of US herds. Three hierarchical models were investigated. Model 1 inferred the value of a temperature-humidity index (THI) at which mean yield began to decline as well as the extent of that decline. Model 2 assumed individual variation in yield decline beyond a common THI threshold. Model 3 additionally assumed individual variation for the onset of heat stress. Deviance information criteria indicated the superiority of model 3 over model 2. For model 2, genetic correlation between milk yield in the absence of heat stress and the THI threshold for heat stress was -0.4 (0.11) [marginal posterior mean (marginal posterior standard deviation)]. For model 3, genetic correlations were -0.53 (0.05) between milk yield and THI threshold and -0.62 (0.08) between milk yield and yield decay beyond the THI threshold. Total standard deviation (sum of additive genetic and permanent envi-ronmental standard deviations) for the THI threshold was 3.95 (0.06), and more than half of that variation had an additive genetic origin [56% (5%)]. Because of the high genetic correlation [0.95 (0.03)] between yield decay and THI threshold with model 3, using only one of them as a selection criterion for heat tolerance would modify the other in the desired direction.
© american Dairy Science ass... Presentar Todo |
Palabras claves : |
GENETIC VARIABILITY; HEAT STRESS; HOLSTEIN; MILK YIELD. |
Thesagro : |
LECHERÍA; VARIABILIDAD GENETICA. |
Asunto categoría : |
-- |
URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/12194/1/1-s2.0-S0022030209707271-main.pdf
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Marc : |
LEADER 02375naa a2200277 a 4500 001 1012828 005 2019-06-18 008 2009 bl uuuu u00u1 u #d 022 $a0022-0302 024 7 $a10.3168/jds.2008-1626$2DOI 100 1 $aSÁNCHEZ, J.P. 245 $aGenetic determination of the onset of heat stress on daily milk production in the US Holstein cattle.$h[electronic resource] 260 $c2009 500 $aArticle history: Received August 12, 2008. // Accepted March 18, 2009. 520 $aABSTRACT. Existence of individual variation in the onset of heat stress for daily milk yield of dairy cows was assessed. Data included 353,376 test-day records of 38,383 first-parity Holsteins from a random sample of US herds. Three hierarchical models were investigated. Model 1 inferred the value of a temperature-humidity index (THI) at which mean yield began to decline as well as the extent of that decline. Model 2 assumed individual variation in yield decline beyond a common THI threshold. Model 3 additionally assumed individual variation for the onset of heat stress. Deviance information criteria indicated the superiority of model 3 over model 2. For model 2, genetic correlation between milk yield in the absence of heat stress and the THI threshold for heat stress was -0.4 (0.11) [marginal posterior mean (marginal posterior standard deviation)]. For model 3, genetic correlations were -0.53 (0.05) between milk yield and THI threshold and -0.62 (0.08) between milk yield and yield decay beyond the THI threshold. Total standard deviation (sum of additive genetic and permanent envi-ronmental standard deviations) for the THI threshold was 3.95 (0.06), and more than half of that variation had an additive genetic origin [56% (5%)]. Because of the high genetic correlation [0.95 (0.03)] between yield decay and THI threshold with model 3, using only one of them as a selection criterion for heat tolerance would modify the other in the desired direction. © american Dairy Science association, 2009. 650 $aLECHERÍA 650 $aVARIABILIDAD GENETICA 653 $aGENETIC VARIABILITY 653 $aHEAT STRESS 653 $aHOLSTEIN 653 $aMILK YIELD 700 1 $aMISZTAL, I. 700 1 $aAGUILAR, I. 700 1 $aZUMBACH, B. 700 1 $aREKAYA, R. 773 $tJournal of Dairy Science, 2009, 92 (8): 4035-4045. OPEN ACCESS.
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INIA Las Brujas (LB) |
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Registro completo
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Biblioteca (s) : |
INIA La Estanzuela; INIA Tacuarembó; INIA Treinta y Tres. |
Fecha actual : |
21/02/2014 |
Actualizado : |
05/08/2022 |
Tipo de producción científica : |
Libros |
Autor : |
KOHLI, M.M.; MARTINO, D. (Ed.). |
Afiliación : |
CIMMYT (Centro Internacional de Mejoramiento de Maíz y Trigo).; DANIEL LUIS MARTINO SCANDROGLIO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
Título : |
Explorando altos rendimientos de trigo. |
Fecha de publicación : |
1997 |
Fuente / Imprenta : |
La Estanzuela, Colonia, Uruguay: CIMMYT-INIA, octubre 20-23 1997. |
Páginas : |
337 p. |
ISBN : |
9974-7586-0-2. |
Idioma : |
Español |
Notas : |
Centro Internacional de Mejoramiento de Maíz y Trigo; Instituto Nacional de Investigación Agropecuaria, Uruguay |
Palabras claves : |
FITOMEJORAMIENTO; FITOPATOLOGIA; MANEJO DEL CULTIVO. |
Thesagro : |
FITOMEJORAMIENTO; FITOPATOLOGÍA; MANEJO DEL CULTIVO; MODELOS DE SIMULACIÓN; TRIGO; TRITICUM AESTIVUM. |
Asunto categoría : |
-- F01 Cultivo |
Marc : |
LEADER 00767nam a2200241 a 4500 001 1043279 005 2022-08-05 008 1997 bl uuuu u01u1 u #d 100 1 $aKOHLI, M.M. 245 $aExplorando altos rendimientos de trigo. 260 $aLa Estanzuela, Colonia, Uruguay: CIMMYT-INIA, octubre 20-23 1997.$c1997 300 $a337 p. 500 $aCentro Internacional de Mejoramiento de Maíz y Trigo; Instituto Nacional de Investigación Agropecuaria, Uruguay 650 $aFITOMEJORAMIENTO 650 $aFITOPATOLOGÍA 650 $aMANEJO DEL CULTIVO 650 $aMODELOS DE SIMULACIÓN 650 $aTRIGO 650 $aTRITICUM AESTIVUM 653 $aFITOMEJORAMIENTO 653 $aFITOPATOLOGIA 653 $aMANEJO DEL CULTIVO 700 1 $aMARTINO, D.
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