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Genetic evaluation of the Lusitano horse breed in morphology competitions
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The Lusitano horse is the main equine breed in Portugal, often presented in breed morphology competitions in
Portugal and abroad. In this study, 7,721 records of model and movements competitions (MM) of the Lusitano breed
(1966 to 2017) were used, provided by APSL. In MM, animals are grouped by classes, considering age, gender and
type of presentation. Eighteen different competitions from 15 countries were considered and information from the
Studbook was used with pedigrees of 76,349 animals. Records of MM evaluation (MME) were converted on a scale
of 0-80 points, depending on the sum of points attributed to the classification/ranking, medal and titles awarded. Points
from 1st to 7th place were awarded (10 to 2 points, respectively). For gold, silver and bronze medals, 20, 15 and 10
points were given, respectively. As for the titles, 25 points were awarded to the Male or Female Champion and 25
to the Champion of Champions. The genetic parameters of MME were estimated using the BLUP-Animal Model,
by REML and univariate analysis, including fixed effects of location×year, breeder, class, birth season and linear
effect of individual inbreeding. As random effects, the animal’s breeding value, permanent environmental effect and
residual effect were considered. MME resulted in a global average score of 18.203±13.166 pts and the environmental
effect of location×year and the breeder, justify a considerable variability of MME. MME showed a genetic standard
deviation of 3.326 points whereas the estimates of heritability and permanent environmental effect were 0.079±0.020
and 0.106±0.019, respectively (repeatability of 0.185). There were considerable differences between classes, with
higher average values for broodmares with foals (+5.5 pts). The degree of Inbreeding depression was estimated in
-0.063 pts by 1% inbreeding
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Citação
Vicente; A., Serpa, R. , Ralão, J., Brito, L.M. & Carolino, N. (2020). Genetic evaluation of the Lusitano horse breed in morphology competitions. Book of Abstracts of the 71st Annual Meeting of the European Federation of Animal Science, 26. p.339
Editora
Wageningen Academic Publishers