Accounting for heterogeneous variances in multitrait evaluation of Jersey type traits.

doi:10.3168/jds.S0022-0302(06)72588-7

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Article

Accounting for heterogeneous variances in multitrait evaluation of Jersey type traits.

Journal of dairy science - 1 Aug 2006

Gengler N, Wiggans G R, Thornton L L M, Wright J R, Druet T

Abstract excerpt

The multitrait genetic evaluation system for type traits was modified to estimate adjustments for heterogeneous variance (HV) simultaneously with estimated breeding values (EBV) for final score and 14 linear traits. Each variance within herd, year, and parity was regressed toward a predicted variance, which was determined by fitting a model with fixed effects of the mean final score for herd, size of the...

Topics

Animals
Breeding
Cattle
Female
Genetic Variation
Insemination, Artificial
Male
Mammary Glands, Animal
Models, Genetic
Quantitative Trait, Heritable
Regression Analysis

Source

Open in PubMed

Identifiers

PMID: 16840631
DOI: 10.3168/jds.S0022-0302(06)72588-7

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