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Genetic Parameters for Endocrine Fertility Traits from In-line Milk Progesterone Records in Dairy Cows

Tuesday, August 19, 2014: 5:15 PM
Bayshore Grand Ballroom D (The Westin Bayshore)
Amabel Manyu Mefru Tenghe , Animal Breeding and Genomics Centre, Wageningen University, Wageningen, Netherlands
Aniek C Bouwman , Animal Breeding and Genomics Centre, Wageningen UR Livestock Research, Wageningen, Netherlands
Britt Berglund , Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, Uppsala, Sweden
Erling Strandberg , Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, Uppsala, Sweden
Roel F. Veerkamp , Animal Breeding and Genomics Centre, Wageningen University, Wageningen, Netherlands
Recorded Presentation (flv)
Abstract Text: In-line milk progesterone records (n = 163,145) collected from June 2009 through November 2013 for 2,274 lactations of Holstein-Friesian cows in 12 commercial herds in the Netherlands were analyzed for  commencement of luteal activity (CLA), luteal activity during first 60 days in milk (LA60), proportion of samples with luteal activity (PLA), interval from commencement of luteal activity to first service, length of first luteal phase, and number of inter-ovulatory intervals  before first service. Heritability (0.13, 0.10, and 0.05) and repeatability  estimates (0.26, 0.21, and 0.16) were greatest for CLA, PLA and LA60, respectively, compared with other traits. Genetic correlations were 0.96 to 0.99 between these traits. This study shows that in-line P4 records can be used to define and explore several heritable endocrine fertility traits that can be used in genetic improvement of fertility by selection.

Keywords: in-line progesterone, cow fertility, genetics

See more of: Genetics of Trait Complexes - Reproduction
See more of: Genetics of Trait Complexes: Reproduction
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