Article| Volume 75, ISSUE 4, P1147-1153, April 1992

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Genetic and Phenotypic Parameters for type and Production in Guernsey Dairy Cows1

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      Heritabilities; genetic and phenotypic correlations for milk, fat, and protein production; and linear type traits were estimated from a sire model including sire relationships using multiple-trait REML. For the milk production traits, 68,109 first parity records were analyzed. Heritabilities ranged from .31 to .37, genetic correlations between the milk production traits ranged from .80 to .92, and phenotypic correlations ranged from .86 to .94. Linear type traits from 12,996 cows on 15 traits were used to estimate heritabilities and genetic and phenotypic correlations between linear type traits. The heritabilities ranged from .53 for stature to .09 for foot angle. Rear udder height and rear udder width had the highest positive genetic correlation (.85), whereas dairy form and udder depth had the highest negative genetic correlation (−.41). When the first parity production records were merged with type records for cows, 9867 records on 18 traits were obtained. Dairy form, rear udder height, and rear udder width had strong to moderate positive genetic correlations with the three production traits. Fore udder attachment and udder depth had moderate negative genetic correlations with the three milk production traits. These results suggest that selection for improvement of milk production will lead to correlated increases in dairy form, rear udder height, rear udder width, and udder depth and to correlated decreases in the strength of fore udder attachment.

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        • Boldman K.B.
        • Freeman A.E.
        • Harris B.L.
        • Kuck A.L.
        Prediction of sire transmitting abilities for herdlife from transmitting abilities for linear type traits.
        J. Dairy Sci. 1992; 75: 552
        • Chanhan V.P.S.
        • Hayes J.F.
        Genetic parameters for first lactation milk production and composition traits for Holsteins using multivariate restricted maximum likelihood.
        J. Dairy Sci. 1991; 74: 603
        • Cue R.I.
        • Monardes H.G.
        • Hayes J.F.
        Correlations between production traits in first lactation Holstein cows.
        J. Dairy Sci. 1987; 70: 2132
        • Dong M.C.
        • Van Vleck L.D.
        • Wiggans G.R.
        Effect of relationships on estimation of variance components with an animal model and restricted maximum likelihood.
        J. Dairy Sci. 1988; 71: 3047
        • Foster W.W.
        • Freeman A.E.
        • Berger P.J.
        • Kuck A.
        Linear type trait analysis with genetic parameter estimation.
        J. Dairy Sci. 1988; 71: 223
        • Lawstuen D.A.
        • Hansen L.B.
        • Johnson L.P.
        Inheritance and relationships of linear type traits for age groups of Holsteins.
        J. Dairy Sci. 1987; 70: 1027
        • Meyer K.
        Restricted maximum likelihood to estimate genetic parameters—in practice.
        in: Proc. 3rd World Congr. Genet. Appl. Livest. Prod., Lincoln, NE1986: 454 (XII)
        • Meyer K.
        • Brothersone S.
        • Hill W.G.
        • Edwards M.R.
        Inheritance of linear type traits in dairy cattle and the correlations with milk production.
        Anim. Prod. 1987; 44: 1
        • Norman H.D.
        • Powell R.L.
        • Mohammad W.A.
        • Wright J.R.
        Effect of herd and sire on uniform functional type trait appraisal scores for Ayrshires, Guernseys, Jerseys, and Milking Shorthorns.
        J. Dairy Sci. 1983; 66: 2173
        • Norman H.D.
        • Powell R.L.
        • Wright J.R.
        • Cassel B.G.
        Phenotypic and genetic relationship between linear functional type traits and milk yield for five breeds.
        J. Dairy Sci. 1988; 71: 1880
        • Quaas R.L.
        Computing the diagonal elements and inverse of a large numerator relationship matrix.
        Biometrics. 1976; 32: 949
        • Searle S.R.
        Matrix algebra for biological sciences.
        John Wiley & Sons, New York, NY1966
        • Thompson J.R.
        • Lee K.L.
        • Freeman A.E.
        • Johnson L.P.
        Evaluation of a linearized type appraisal system for Holstein cattle.
        J. Daily Sci. 1983; 66: 325
        • Thompson R.
        Methods for estimation of genetic parameters.
        in: Proc. 2nd World Congr. Genet Appl. Livest. Prod., Madrid, Spain1982: 95 (V)
      1. VanRaden, P. M. 1986. Computational strategies for estimation of variance components. PhD. Diss., Iowa Slate Univ., Ames.

        • Van Vleck L.D.
        • Dong M.C.
        Genetic (co)variance for milk, fat, and protein yield in Holsteins using an animal model.
        J. Dairy Sci. 1988; 71: 3040