Genetic parameter estimation for long endurance trials in the Uruguayan Criollo horse

Autor:	R.D. López-Correa, G. Rovere, J. I. Urioste, Francisco Peñagaricano
Jazyk:	angličtina
Rok vydání:	2018
Předmět:	0301 basic medicine Multivariate statistics Genetic correlation Lineage (genetic) biology.animal_breed Biology Breeding Horse Endurance Heritability 03 medical and health sciences Animal model Food Animals Statistics Animals Criollo horse Horses Models Statistical Models Genetic Estimation theory 0402 animal and dairy science 04 agricultural and veterinary sciences General Medicine 040201 dairy & animal science Rank 030104 developmental biology Physical Endurance Criollo tobacco Uruguay Animal Science and Zoology Female Maternal Inheritance
Zdroj:	López-Correa, R D, Peñagaricano, F, Rovere, G & Urioste, J I 2018, ' Genetic parameter estimation for long endurance trials in the Uruguayan Criollo horse ', Journal of Animal Breeding and Genetics, vol. 135, no. 3, pp. 186-193 . https://doi.org/10.1111/jbg.12324
DOI:	10.1111/jbg.12324
Popis:	The aim of this study was to estimate the genetic parameters of performance in a 750-km, 15-day ride in Criollo horses. Heritability (h2) and maternal lineage effects (mt2) were obtained for rank, a relative placing measure of performance. Additive genetic and maternal lineage (rmt) correlations among five medium-to-high intensity phase ranks (pRK) and final rank (RK) were also estimated. Individual records from 1,236 Criollo horses from 1979 to 2012 were used. A multivariate threshold animal model was applied to the pRK and RK. Heritability was moderate to low (0.156-0.275). Estimates of mt2 were consistently low (0.04-0.06). Additive genetic correlations between individual pRK and RK were high (0.801-0.924), and the genetic correlations between individual pRKs ranged from 0.763 to 0.847. The pRK heritabilities revealed that some phases were explained by a greater additive component, whereas others showed stronger genetic relationships with RK. Thus, not all pRK may be considered as similar measures of performance in competition.
Databáze:	OpenAIRE
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