Abstract

YAKUBU, A.; SALAKO, A.E.  and  ABDULLAH, A-R.. Varimax rotated principal component factor analysis of the zoometrical traits of Uda sheep. Arch. zootec. [online]. 2011, vol.60, n.231, pp.813-816. ISSN 1885-4494.  https://dx.doi.org/10.4321/S0004-05922011000300069.

A study was conducted to determine the interdependence among the conformation traits of 359 Uda rams using principal component factor analysis. The body measurements were withers height, body length, heart girth, rump height, rump width, rump length, face length, foreleg length and shoulder width. Age group of animals was a significant (p<0.05) source of variation for the studied traits. The various constituent parts of the body developed at varying rates. From the factor analysis, with varimax rotation of the transformation matrix, two principal components were extracted, which accounted for 86.3% of the total variance. The first principal component alone explained 80.8% of the variation, and tended to describe general size, while the second principal component had its loadings for meat traits (rump width, shoulder width and rump length). The two extracted principal components could be considered in selection programmes to obtain animals with better conformation using fewer measurements.

Keywords : Morpphometry; Age; Correlation; Multivariate analysis.

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