Anders Christian Sørensen

Genetic Parameters for Fertility Measurements in Holstein Heifers: The activity tag Heatime makes a difference

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

  • Lydia Henriette Sørensen, Animal Genetics, Bioinformatics and Breeding, Department of Vetrinary Clinical and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Danmark
  • Anders Christian Sørensen
  • Thomas Mark, Animal Genetics, Bioinformatics and Breeding, Department of Vetrinary Clinical and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Danmark
  • Morten Kargo
Our aim was to investigate whether four fertility traits were different in herds using the activity tag Heatime for reproduction management compared within other herds. The genetic parameters were estimated using animal models. The fertility traits were number of inseminations (NINS), interval from first to last insemination (IFL), age at first insemination (AFI), and age at first calving (AFC) in Danish Holstein heifers. The means of the traits were all significantly different between the two groups of herds. Heritabilities for NINS and IFL were lower than 1%, while heritabilities for AFI and AFC were 12–29%. Heritabilities were all lower in Heatime herds than in reference herds. The genetic correlations between traits in different environments were high for NINS, AFI, and AFC (>0.88), while the correlation for IFL was 0.68 but with a higher SE (0.313). Thus, IFL seems not to be the same trait in Heatime and reference herds
OriginalsprogEngelsk
TidsskriftActa Agriculturae Scandinavica, Section A - Animal Science
Vol/bind63
Nummer4
Sider (fra-til)169-174
Antal sider8
ISSN0906-4702
DOI
StatusUdgivet - 14 jul. 2014

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