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Statements

Subject Item
n2:RIV%2F00027014%3A_____%2F12%3A%230001597%21RIV13-MZE-00027014
rdf:type
skos:Concept n18:Vysledek
rdfs:seeAlso
http://www.agriculturejournals.cz/publicFiles/61173.pdf
dcterms:description
The aim of this study was to estimate genetic parameters for female fertility and production traits in first-parity Czech Holstein cows and to quantify the effect of using this information on the accuracy of a selection index in seven different scenarios. In order to estimate genetic (co)variance components, the DMU software running an AI-REML algorithm was used. The analyses were made using a series of bivariate animal models. The pedigree included 164 125 animals and it was set up using a pruned animal model design. The present study included the following female fertility traits for the first lactations: calving to the first insemination (CF), days open (DO), calving from the first to the last insemination (FL), and milk production traits: milk production (MLK), kg of fat (FAT), and kg of protein (PROT). The heritability for all the investigated fertility traits was low and close to 0. Moderate heritabilities for production traits ranging from 0.20 (MLK) to 0.23 (PROT) were estimated. The strongest unfavourable correlation was found between PROT and DO (0.49). Other estimated correlations between fertility traits and production traits were moderate, ranging from 0.26 to 0.41. The results of this study evidence that cows with the poorest genetic potential for reproductive performance are those having high genetic potential for milk production and milk components. The results also show that the number of days from calving to new pregnancy depends on the production level. Seven investigated scenarios using selection index theory show a clear trend for increasing accuracy when more fertility traits were added as well as when higher numbers of daughters with information on reproduction traits per sire were available The aim of this study was to estimate genetic parameters for female fertility and production traits in first-parity Czech Holstein cows and to quantify the effect of using this information on the accuracy of a selection index in seven different scenarios. In order to estimate genetic (co)variance components, the DMU software running an AI-REML algorithm was used. The analyses were made using a series of bivariate animal models. The pedigree included 164 125 animals and it was set up using a pruned animal model design. The present study included the following female fertility traits for the first lactations: calving to the first insemination (CF), days open (DO), calving from the first to the last insemination (FL), and milk production traits: milk production (MLK), kg of fat (FAT), and kg of protein (PROT). The heritability for all the investigated fertility traits was low and close to 0. Moderate heritabilities for production traits ranging from 0.20 (MLK) to 0.23 (PROT) were estimated. The strongest unfavourable correlation was found between PROT and DO (0.49). Other estimated correlations between fertility traits and production traits were moderate, ranging from 0.26 to 0.41. The results of this study evidence that cows with the poorest genetic potential for reproductive performance are those having high genetic potential for milk production and milk components. The results also show that the number of days from calving to new pregnancy depends on the production level. Seven investigated scenarios using selection index theory show a clear trend for increasing accuracy when more fertility traits were added as well as when higher numbers of daughters with information on reproduction traits per sire were available
dcterms:title
Genetic parameters for female fertility and milk production traits in first-parity Czech Holstein cows Genetic parameters for female fertility and milk production traits in first-parity Czech Holstein cows
skos:prefLabel
Genetic parameters for female fertility and milk production traits in first-parity Czech Holstein cows Genetic parameters for female fertility and milk production traits in first-parity Czech Holstein cows
skos:notation
RIV/00027014:_____/12:#0001597!RIV13-MZE-00027014
n18:predkladatel
n19:ico%3A00027014
n3:aktivita
n11:P n11:Z
n3:aktivity
P(QI91A238), Z(MZE0002701404)
n3:cisloPeriodika
3
n3:dodaniDat
n9:2013
n3:domaciTvurceVysledku
n13:4008367 n13:1195735
n3:druhVysledku
n4:J
n3:duvernostUdaju
n14:S
n3:entitaPredkladatele
n8:predkladatel
n3:idSjednocenehoVysledku
137909
n3:idVysledku
RIV/00027014:_____/12:#0001597
n3:jazykVysledku
n5:eng
n3:klicovaSlova
dairy cattle, reproduction, production, genetic parameters
n3:klicoveSlovo
n6:dairy%20cattle n6:genetic%20parameters n6:production n6:reproduction
n3:kodStatuVydavatele
CZ - Česká republika
n3:kontrolniKodProRIV
[8635F0A87FF9]
n3:nazevZdroje
Czech Journal of Animal Science
n3:obor
n17:GG
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
3
n3:projekt
n20:QI91A238
n3:rokUplatneniVysledku
n9:2012
n3:svazekPeriodika
57
n3:tvurceVysledku
Zink, Vojtěch Lasen, J. Štípková, Miloslava
n3:wos
000302932100002
n3:zamer
n7:MZE0002701404
s:issn
1212-1819
s:numberOfPages
7