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Sexual dimorphism in Hucul horses using discriminant analysis

Published online by Cambridge University Press:  12 November 2010

H. Purzyc ,
F. Kobryńczuk  and
J. Bojarski
H. Purzyc*
Affiliation:
Department of Genetics and Animal Breeding, Warsaw University of Life Sciences – SGGW, ul. Ciszewskiego 8, 02-786 Warsaw, Poland Department of Biostructure and Animal Physiology, Wroclaw University of Environmental and Life Sciences, ul. Kożuchowska 1/3, 51-631 Wroclaw, Poland
F. Kobryńczuk
Affiliation:
Department of Morphological Sciences, Warsaw University of Life Sciences – SGGW, ul. Nowoursynowska 159, 02-776 Warsaw, Poland
J. Bojarski
Affiliation:
Faculty of Mathematics, University of Zielona Góra, Computer Science and Econometrics, ul. prof. Z. Szafrana 4a, 65-516 Zielona Góra, Poland
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Abstract

The purpose of this study has been to evaluate the applicability of discriminant function analysis to determine gender dimorphism in Hucul horses, based on morphological indices obtained in different stages of life. A total of 243 horses, divided into six age groups, have been examined in its course. For each horse we have measured 12 metric traits, which were then used to calculate 13 biometric indices commonly used in horse breeding in Poland. These have become the basis for defining functions classifying the animals by gender in each of the six age groups. This study answers the question of what parameters play the greatest role in the course of shaping of body proportions of male and female horses in post-foetal development. The following indices have been found to significantly contribute in discriminant models: boniness, smaller trunk length, height at the croup, pelvis width and width of chest.

Keywords

conformationhorseindiceslinear measurementssexual dimorphism
Type
Full Paper
Information
animal , Volume 5 , Issue 4 , 23 February 2011 , pp. 506 - 511
Copyright
Copyright © The Animal Consortium 2010

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