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Registro completo
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Biblioteca (s) : |
INIA Las Brujas. |
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Fecha : |
21/02/2014 |
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Actualizado : |
04/11/2019 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Autor : |
AGUILAR, I.; MISZTAL, I.; TSURUTA, S. |
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Afiliación : |
IGNACIO AGUILAR GARCIA, Instituto Nacional de Investigación Agropecuaria (INIA), Uruguay; I. MISZTAL, Animal and Dairy Science Department, University of Georgia,United States; S. TSURUTA, Animal and Dairy Science Department, University of Georgia,United States. |
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Título : |
Short communication: Genetic trends of milk yield under heat stress for US Holsteins. |
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Fecha de publicación : |
2010 |
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Fuente / Imprenta : |
Journal of Dairy Science, 2010, v.93, no.4, p. 1754-1758. |
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DOI : |
10.3168/jds.2009-2756 |
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Idioma : |
Inglés |
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Notas : |
Article history: Received September 21, 2009. / Accepted December 4, 2009. |
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Contenido : |
ABSTRACT.
Data included 90,242,799 test-day milk records from 5,402,484 Holstein cows in the first 3 parities and 9,326,754 animals in the pedigree. Additionally, daily temperature-humidity indexes from 202 weather stations were available. Analyses were done by a random regression model in which each parity was treated as a separate trait and that accounted for heat stress. The fixed effects included herd test-day, age at calving, milking frequency, and days in milk classes. Random effects included additive genetic, permanent environment, and herd-year effects, all fit as random regressions. Five covariates in the random regressions included linear splines with 4 knots at 5, 50, 200, and 305 DIM and a function of a temperature-humidity index (THI). Mixed model equations were solved by using an iteration on data approach with a preconditioned conjugate gradient algorithm. Genetic trends for daily milk yield in absence of heat stress (intercept) were 0.140 kg/yr, 0.172 kg/yr, and 0.168 kg/yr for the first, second, and third parity, respectively. Genetic trends for decline of milk yield at temperature of 5°C THI over the threshold of sensitivity to heat stress were -0.002 kg/yr, -0.035 kg/yr, and -0.038 kg/yr, for first, second, and third parity, respectively. Genetic profiles were created by contrasting the 100 most and 100 least heat-tolerant bulls for the official proofs. The most heat-tolerant bulls transmitted lower production and dairy form but higher fertility, productive life, and type, especially udder and locomotion traits. In later parities, the type advantages were smaller. Test-day records capture only a fraction of information due to heat stress, and the real trends for heat stress may be stronger. Studies on heat stress for production should include records on later parities.
© 2010 American Dairy Science Association. MenosABSTRACT.
Data included 90,242,799 test-day milk records from 5,402,484 Holstein cows in the first 3 parities and 9,326,754 animals in the pedigree. Additionally, daily temperature-humidity indexes from 202 weather stations were available. Analyses were done by a random regression model in which each parity was treated as a separate trait and that accounted for heat stress. The fixed effects included herd test-day, age at calving, milking frequency, and days in milk classes. Random effects included additive genetic, permanent environment, and herd-year effects, all fit as random regressions. Five covariates in the random regressions included linear splines with 4 knots at 5, 50, 200, and 305 DIM and a function of a temperature-humidity index (THI). Mixed model equations were solved by using an iteration on data approach with a preconditioned conjugate gradient algorithm. Genetic trends for daily milk yield in absence of heat stress (intercept) were 0.140 kg/yr, 0.172 kg/yr, and 0.168 kg/yr for the first, second, and third parity, respectively. Genetic trends for decline of milk yield at temperature of 5°C THI over the threshold of sensitivity to heat stress were -0.002 kg/yr, -0.035 kg/yr, and -0.038 kg/yr, for first, second, and third parity, respectively. Genetic profiles were created by contrasting the 100 most and 100 least heat-tolerant bulls for the official proofs. The most heat-tolerant bulls transmitted lower production and dairy form but higher fertility, producti... Presentar Todo |
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Thesagro : |
ESTRES CALORICO; GANADO LECHERO. |
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Asunto categoría : |
L01 Ganadería |
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URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/3652/1/Aguilar-I.-2010-Jr.Dairy-Sc.v.93-p.1754-1758.pdf
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Marc : |
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024 7 $a10.3168/jds.2009-2756$2DOI
100 1 $aAGUILAR, I.
245 $aShort communication$bGenetic trends of milk yield under heat stress for US Holsteins.$h[electronic resource]
260 $c2010
500 $aArticle history: Received September 21, 2009. / Accepted December 4, 2009.
520 $aABSTRACT. Data included 90,242,799 test-day milk records from 5,402,484 Holstein cows in the first 3 parities and 9,326,754 animals in the pedigree. Additionally, daily temperature-humidity indexes from 202 weather stations were available. Analyses were done by a random regression model in which each parity was treated as a separate trait and that accounted for heat stress. The fixed effects included herd test-day, age at calving, milking frequency, and days in milk classes. Random effects included additive genetic, permanent environment, and herd-year effects, all fit as random regressions. Five covariates in the random regressions included linear splines with 4 knots at 5, 50, 200, and 305 DIM and a function of a temperature-humidity index (THI). Mixed model equations were solved by using an iteration on data approach with a preconditioned conjugate gradient algorithm. Genetic trends for daily milk yield in absence of heat stress (intercept) were 0.140 kg/yr, 0.172 kg/yr, and 0.168 kg/yr for the first, second, and third parity, respectively. Genetic trends for decline of milk yield at temperature of 5°C THI over the threshold of sensitivity to heat stress were -0.002 kg/yr, -0.035 kg/yr, and -0.038 kg/yr, for first, second, and third parity, respectively. Genetic profiles were created by contrasting the 100 most and 100 least heat-tolerant bulls for the official proofs. The most heat-tolerant bulls transmitted lower production and dairy form but higher fertility, productive life, and type, especially udder and locomotion traits. In later parities, the type advantages were smaller. Test-day records capture only a fraction of information due to heat stress, and the real trends for heat stress may be stronger. Studies on heat stress for production should include records on later parities. © 2010 American Dairy Science Association.
650 $aESTRES CALORICO
650 $aGANADO LECHERO
700 1 $aMISZTAL, I.
700 1 $aTSURUTA, S.
773 $tJournal of Dairy Science, 2010$gv.93, no.4, p. 1754-1758.
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| 2. |  | BENTANCOR, L.; RUIZ, A.; CASTAÑO, V.; DURÁN, P. Medición de agua y transmisión de datos en sistemas de riego por gravedad. ln: JORNADA ANUAL ARROZ, 2016, INIA TREINTA Y TRES, TREINTA Y TRES, UY. Arroz: resultados experimentales 2015-2016. Treinta y Tres, (Uruguay): INIA, 2016. cap. 2, p. 23-25. (INIA Serie Actividades de Difusión; 765)| Biblioteca(s): INIA Tacuarembó; INIA Treinta y Tres. |
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| 4. | | GEORGE, T.S.; GILES, C.D.; MENEZES-BLACKBURN, D.; CONDRON, L.M.; GAMA-RODRIGUES, A.C.; JAISI, D.; LANG, F.; NEAL, A.L.; STUTTER, M.I.; ALMEIDA, D.S.; BOL, R.; CABUGAO, K.G.; CELI, L.; COTNER, J.B.; FENG, G.; GOLL, D.S.; HALLAMA, M.; KRUEGER, J.; PLASSARD, C.; ROSLING, A.; DARCH, T.; FRASER, T.; GIESLER, R.; RICHARDSON, A.E.; TAMBURINI, F.; SHAND, C.A.; LUMSDON, D.G.; ZHANG, H.; BLACKWEL, M.S.A.; WEARING, C.; MEZELI, M.M.; ALMÅS, Å.R.; AUDETTE, Y.; BERTRAND, I.; BEYHAUT, E.; BOITT, G.; BRADSHAW, N.; BREARLEY, C.A.; BRUULSEMA, T.W.; CIAIS, P.; COZZOLINO, V.; DURAN, P.C.; MORA, M.L.; DE MENEZES, A.B.; DODD, R.J.; DUNFIELD, K.; ENGL, C.; FRAZÃO, J.J.; GARLAND, G.; GONZÁLEZ JIMÉNEZ, J.L.; GRACA, J.; GRANGER, S.J.; HARRISON, A.F.; HEUCK, C.; HOU, E.Q.; JOHNES, P.J.; KAISER, K.; KJÆR. H.A.; KLUMPP, E.; LAMB, A.L.; MACINTOSH, K.A.A; MACKAY, E.B.; MCGRATH, J.; MCINTYRE, C.; MCLAREN, T.; MÉSZÁROS, E.; MISSONG, A.; MOOSHAMMER, M.; NEGRÓN, C.P.; NELSON, L.A.; PFAHLER, V.; POBLETE-GRANT, P.; RANDALL, M.; SEGUEL, A.; SETH, K.; SMITH, A.C.; SMITS, M.M.; SOBARZO, J.A.; SPOHN, M.; TAWARAYA, K.; TIBBETT, M.; VORONEY, V.; WALLANDER, H.; WANG, L.; WASAKI, J.; HAYGARTH, P.M. Organic phosphorus in the terrestrial environment: a perspective on the state of the art and future priorities. Plant and Soil, 1 June 2018, Volume 427, Issue 1-2, Pages 191-208. Article history: Received: 28 April 2017 /Accepted: 17 August 2017 / Published online: 6 October 2017.
Update notice: Correction to: Organic phosphorus in the terrestrial environment: a perspective on the state of the art and future...| Tipo: Artículos en Revistas Indexadas Internacionales | Circulación / Nivel : Internacional - -- |
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