Estimating the covariance structure of traits during growth and ageing, illustrated with lactation in dairy cattle.

@article{Kirkpatrick1994EstimatingTC,
  title={Estimating the covariance structure of traits during growth and ageing, illustrated with lactation in dairy cattle.},
  author={Mark Kirkpatrick and W G Hill and Robin Thompson},
  journal={Genetical research},
  year={1994},
  volume={64 1},
  pages={57-69}
}
Quantitative variation in traits that change with age is important to both evolutionary biologists and breeders. We present three new methods for estimating the phenotypic and additive genetic covariance functions of a trait that changes with age, and illustrate them using data on daily lactation records from British Holstein-Friesian dairy cattle. First, a new technique is developed to fit a continuous covariance function to a covariance matrix. Secondly, this technique is used to estimate and… CONTINUE READING

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