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Morphological variation in the horse: defining complex traits of body size and shape

  1. S. A. Brooks1,
  2. S. Makvandi-Nejad2,
  3. E. Chu2,
  4. J. J. Allen2,
  5. C. Streeter1,
  6. E. Gu2,
  7. B. McCleery2,
  8. B. A. Murphy3,
  9. R. Bellone4,
  10. N. B. Sutter2

Article first published online: 10 NOV 2010

DOI: 10.1111/j.1365-2052.2010.02127.x

Issue

Animal Genetics

Animal Genetics

Special Issue: Horse Genomics and the Dorothy Russell Havemeyer Foundation

Volume 41, Issue Supplement s2, pages 159–165, December 2010

Additional Information

How to Cite

Brooks, S. A., Makvandi-Nejad, S., Chu, E., Allen, J. J., Streeter, C., Gu, E., McCleery, B., Murphy, B. A., Bellone, R. and Sutter, N. B. (2010), Morphological variation in the horse: defining complex traits of body size and shape. Animal Genetics, 41: 159–165. doi: 10.1111/j.1365-2052.2010.02127.x

Author Information

  1. 1

    Department of Animal Science, College of Agriculture and Life Sciences, Cornell University, Ithaca, NY 14853, USA.

  2. 2

    Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA.

  3. 3

    School of Agriculture, Food Science and Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland.

  4. 4

    Department of Biology, University of Tampa, Tampa, FL 33606, USA

*N. B. Sutter, C3-179 Veterinary Medical Center, Cornell University, Ithaca, NY 14853, USA. Email: nbs39@cornell.edu

Publication History

  1. Issue published online: 10 NOV 2010
  2. Article first published online: 10 NOV 2010
  3. Accepted for publication 20 September 2010

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Figure S1 Body measurements collected for each horse.

Figure S2 Histograms of counts of horses by (a) age; (b) body condition score where 1 = extremely underweight, 5 = ideal condition and 9 = overweight; (c) muzzle profile where 1 = deeply dish-faced (muzzle seen in profile curves in), 3 = straight and 5 = strongly Roman nosed (muzzle seen in profile curves out); (d) degree of feathering on lower limbs where 1 = no feathering and 5 = copious feathering; (e) bite conformation where 1 = extreme overbite and 5 = extreme underbite; and (f) subjective assessment of skeletal thickness without consideration of the horse’s size, where 1 = a light, thin skeleton and 5 = a heavy, thick skeleton.

Figure S3 Coefficient of variation calculated for each measurement by breed. The boxplot central bar indicates the median breed coefficient of variation.

Figure S4 Scree plot of the proportion of variance explained by each of the first ten principal components from the PCA performed on the 1215 horses measured.

Table S1 Count of measured horses by breed and sex.

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