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Phenotypic Factor Analysis for Linear Type Traits in Beijing Holstein Cows
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 Title & Authors
Phenotypic Factor Analysis for Linear Type Traits in Beijing Holstein Cows
Chu, M.X.; Shi, S.K.;
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Factor analysis was applied to the phenotypic correlation matrix of 15 linear type traits (scored linearly 1 to 50 points) for 2035 Holstein cows of 38 sires computed from data collected between 1988 and 1992 in Beijing Shuangqiao Farm and Beijing Xijiao Farm. The 15 linear type traits were stature, body strength, body depth, dairy form, rump angle, rump length, rump width, rear leg side view, foot angle, fore udder attachment, rear udder height, rear udder width, udder cleft, udder depth and teat placement rear view. The first four components accounted for 49.1% of the total variance in type scores. Factor 1 reflected strong cows, with deep bodies, with long and wide rumps, and tall in stature. Factor 2 reflected cows with well attached fore udders, wide rear udders and whose udders were supported by strong suspensory ligaments with close teat placement. Factor 3 reflected cows with good dairyness, sickled in the hocks, high rear udders and udder floors above the hocks. Factor 4 reflected cows with sloping rumps from hooks to pins and with steep foot angle. Principal component and factor analyses are useful to clarify the relationships among type traits.
Holstein Cows;Type Traits;Factor Analysis;
 Cited by
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Ali, A.K., K.R. Koots and E.B. Burnside. 1998. Factor analysis of genetic evaluations for type traits of Canadian Holstein sires and cows. Asian-Aust. J. Anim. Sci. 11:463-469.

Diers, H. and H. Swalve. 1990. Estimation of genetic parameters and breeding values for linear scored type traits. World Review of Animal Production, XXV(4):67-70.

Foster, W. W., A. E. Freeman, P. J. Berger and A. Kuck. 1988. Linear type trait analysis with genetic parameter estimation. J. Dairy Sci. 71:223-231. crossref(new window)

Kaiser, H. F. 1958. The varimax criterion for analytic rotation in factor analysis. Psychometrika, 23:187-200. crossref(new window)

Klei, L., E. J. Pollak and R. L. Quaas. 1988. Genetic and environmental parameters associated with linearized type appraisal scores. J. Dairy Sci. 71:2744-2752. crossref(new window)

Lawstuen, D. A., L. B. Hansen and L. P. Johnson. 1987. Inheritance and relationships of linear type traits for age groups of Holsteins. J. Dairy Sci. 70:1027-1035. crossref(new window)

Misztal, I., T. J. Lawlor, T. H. Short and P. M. VanRaden. 1992. Multiple trait estimation of variance components of yield and type traits using an animal model. J. Dairy Sci. 75:544-551. crossref(new window)

Norman, H.D., R.L. Powell, J.R. Wright and B.G. Cassell. 1988. Phenotypic and genetic relationship between linear functional type traits and milk yield for five breeds. J. Dairy Sci. 71:1880-1896. crossref(new window)

Sieber, M., A. E. Freeman and P. N. Hinz. 1987. Factor analysis for evaluating relationships between first lactation type scores and production data of Holstein dairy cows. J. Dairy Sci. 70:1018-1026. crossref(new window)

Sieber, M., A. E. Freeman and P. N. Hinz. 1988. Comparison between factor analysis from a phenotypic and genetic correlation matrix using linear type traits of Holstein dairy cows. J. Dairy Sci. 71:477-484. crossref(new window)

Statistical Package for the Social Sciences. 1986. 2nd ed. McGraw-Hill, New York, NY, USA.

Thompson, J. R., A. E. Freeman and P. J. Berger. 1980. Variation of traits of a mating appraisal program. J. Dairy Sci. 63:133-140. crossref(new window)

Thompson, J. R., K. L. Lee, A. E. Freeman and L. P. Johnson. 1983. Evaluation of a linearized type appraisal system for Holstein cattle. J. Dairy Sci. 66:325-331. crossref(new window)

VanRaden, P. M., E. L. Jensen, T. J. Lawlor and D. A. Funk. 1990. Prediction of transmitting abilities for Holstein type traits. J. Dairy Sci. 73:191-197. crossref(new window)