About: Genetic relationship of functional longevity with female fertility and milk production traits in Czech Holsteins

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://www.agriculturejournals.cz/publicFiles/106671.pdf
Description	The objectives of this study were to estimate heritabilities of and genetic correlations among longevity, milk production, and female fertility traits of Holstein cows. Fertility traits were days open, interval from parturition to first service, and days between the first and last insemination in the first and second lactation, respectively. Production traits were first lactation milk, fat, and protein yield. Functional longevity was defined as the number of days between the first calving and culling, i.e. the length of the productive life. The linear animal model included fixed effects of month-year of first calving, regression on age at first calving, regression on milk yield (only for longevity), and random effects of herd-year, animal, and residual. Heritability estimates for fertility traits ranged from 0,02 ± 0,009 to 0,06 ± 0,004. Heritability of longevity was 0,09. Heritability estimates for production traits ranged from 0,29 ± 0,009 (fat and protein yield) to 0,34 ± 0,009 (milk yield). Genetic correlations of longevity with fertility were moderate and favourable, ranging from –0,37 ± 0,068 to –0,44 ± 0,055, except the days between the first and last insemination in the second lactation. Genetic correlations of fertility with production traits were moderate to high and unfavourable, ranging from 0,48 ± 0,042 to 0,65 ± 0,034. Substantial herd-year correlations were found between fertility traits. Residual correlations were small except for those between production traits (> 0,85) and between days open and days between the first and last insemination (0,87). Month-year of first calving effects for longevity declined between 1994 and 2002, while those for production traits and for fertility increased slightly or remained stable during this period. Between 1991 and 2003, genetic trend for longevity declined and increased for production. Estimated genetic changes for fertility were unfavourable. The objectives of this study were to estimate heritabilities of and genetic correlations among longevity, milk production, and female fertility traits of Holstein cows. Fertility traits were days open, interval from parturition to first service, and days between the first and last insemination in the first and second lactation, respectively. Production traits were first lactation milk, fat, and protein yield. Functional longevity was defined as the number of days between the first calving and culling, i.e. the length of the productive life. The linear animal model included fixed effects of month-year of first calving, regression on age at first calving, regression on milk yield (only for longevity), and random effects of herd-year, animal, and residual. Heritability estimates for fertility traits ranged from 0,02 ± 0,009 to 0,06 ± 0,004. Heritability of longevity was 0,09. Heritability estimates for production traits ranged from 0,29 ± 0,009 (fat and protein yield) to 0,34 ± 0,009 (milk yield). Genetic correlations of longevity with fertility were moderate and favourable, ranging from –0,37 ± 0,068 to –0,44 ± 0,055, except the days between the first and last insemination in the second lactation. Genetic correlations of fertility with production traits were moderate to high and unfavourable, ranging from 0,48 ± 0,042 to 0,65 ± 0,034. Substantial herd-year correlations were found between fertility traits. Residual correlations were small except for those between production traits (> 0,85) and between days open and days between the first and last insemination (0,87). Month-year of first calving effects for longevity declined between 1994 and 2002, while those for production traits and for fertility increased slightly or remained stable during this period. Between 1991 and 2003, genetic trend for longevity declined and increased for production. Estimated genetic changes for fertility were unfavourable. (en)
Title	Genetic relationship of functional longevity with female fertility and milk production traits in Czech Holsteins Genetic relationship of functional longevity with female fertility and milk production traits in Czech Holsteins (en)
skos:prefLabel	Genetic relationship of functional longevity with female fertility and milk production traits in Czech Holsteins Genetic relationship of functional longevity with female fertility and milk production traits in Czech Holsteins (en)
skos:notation	RIV/00027014:_____/13:#0001923!RIV14-MZE-00027014
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(QI91A238), Z(MZE0002701404)
http://linked.open...iv/cisloPeriodika	12
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Zink, Vojtěch Zavadilová, Ludmila
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Výzkumný ústav živočišné výroby, v.v.i.
http://linked.open...dnocenehoVysledku	76392
http://linked.open...ai/riv/idVysledku	RIV/00027014:_____/13:#0001923
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Holstein cattle, genetic parameters, milk yield, functional traits (en)
http://linked.open.../riv/klicoveSlovo	Holstein cattle genetic parameters functional traits milk yield
http://linked.open...odStatuVydavatele	CZ - Česká republika
http://linked.open...ontrolniKodProRIV	[A0A57780215D]
http://linked.open...i/riv/nazevZdroje	Czech Journal of Animal Science
http://linked.open...in/vavai/riv/obor	GI
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	2 (xsd:int)
http://linked.open...vavai/riv/projekt	Efficient approaches in dairy herd management
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	58
http://linked.open...iv/tvurceVysledku	Zavadilová, Ludmila Zink, Vojtěch
http://linked.open...ain/vavai/riv/wos	000328563000003
http://linked.open...n/vavai/riv/zamer	Udržitelný rozvoj chovu hospodářských zvířat v evropském modelu multifunkčního zemědělství
issn	1212-1819
number of pages	12 (xsd:int)

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