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Agronomía Mesoamericana
Article . 2010 . Peer-reviewed
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Agronomía Mesoamericana
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Agronomía Mesoamericana
Article . 2010
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Efectos genéticos aditivos y no aditivos en cruces rotacionales holstein×jersey y holstein×pardo suizo

Authors: Vargas Leitón, Bernardo; ROMERO-ZUÑIGA, JUAN JOSÉ;

Efectos genéticos aditivos y no aditivos en cruces rotacionales holstein×jersey y holstein×pardo suizo

Abstract

El objetivo del presente estudio fue cuantificar el impacto de efectos genéticos aditivos y no aditivos sobre días abie rtos (DA), edad a primer parto (EPP), vida productiva (VP) y producción de leche por día (KG) en cruces rotacionales Holstein×Jersey (HxJ) y Holstein×Pardo Suizo (HxPS). Los datos utilizados se colectaron en fincas lecheras de Costa Rica en el periodo entre 1990 a 2009. Los efectos fueron cuantificados utilizando dos métodos: un modelo estadístico de clasificación racial y un modelo genético de regresión sobre heterocigosidad esperada. Se observaron correlaciones mayores a 0,90 entre los rendimie ntos predichos por ambos métodos. Los porcentajes de heterosis directa para H×J vs. ×PS fueron, respectivamente: -6,4 vs. -2,2 para DA; -2,5 vs. -2,2 para EPP, 4,4 vs. 12,2 para VP, y 3,2 vs. 3,8 para KG. Se gún el modelo genético los efectos aditivos directos fueron significativos (P < 0,05) para todos los rasgos excepto VP en H×PS; mie ntras que los efectos aditivos maternos fueron significativos (P < 0,05) para VP y KG en ambos cruces rotacionales. La heterosis directa fue significativa (P < 0,05) para DA, EPP y KG en H×J; así como EPP, VP y KG en H×PS. La heterosis materna fue significativa (P < 0,05) para EPP y KG en ×J y para KG en H×PS. El efecto de recombinación fue significativo (P < 0,05) para EPP y KG en ×J; así como para KG en ×PS. En general, tanto los efectos genéticos aditivos como no aditivos juegan un papel importante en estos dos cruces.

Country
Costa Rica
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Keywords

GENETICA DE POBLACIONES, MILK CATTLE, S, GANADO DE LECHE, Dairy crosses, rasgos productivos, Agriculture, productive traits, Cruces lecheros, BOVINOS, POPULATION GENETICS, rasgos funcionales, heterosis, BOVINE, functional traits

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    influence
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    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
2
Average
Average
Average
Green
gold