Estimates of genetic parameters and environmental effects for measures of hunting performance in Finnish hounds.
Data from field trials of Finnish Hounds between 1988 and 1992 in Finland were used to estimate genetic parameters and environmental effects for measures of hunting performance using REML procedures and an animal model. The original data set included 28,791 field trial records from 5,666 dogs. Males and females had equal hunting performance, whereas experience acquired by age improved trial results compared with results for young dogs (P < .001). Results were mostly better on snow than on bare ground (P < .001), and testing areas, years, months, and their interactions affected results (P < .001). Estimates of heritabilities and repeatabilities were low for most of the 28 measures, mainly due to large residual variances. The highest heritabilities were for frequency of tonguing (h2 = .15), pursuit score (h2 = .13), tongue score (h2 = .13), ghost trailing score (h2 = .12), and merit and final score (both h2 = .11). Estimates of phenotypic and genetic correlations were positive and moderate or high for search scores, pursuit scores, and final scores but lower for other studied measures. The results suggest that, due to low heritabilities, evaluation of breeding values for Finnish Hounds with respect to their hunting ability should be based on animal model BLUP methods instead of mere performance testing. The evaluation system of field trials should also be revised for more reliability.
Liinamo
A E
AE
Department of Animal Science, Helsinki University, Finland.
Karjalainen
L
L
Ojala
M
M
Vilva
V
V
D000375:Aging / Q000502:physiology; D000704:Analysis of Variance; D000818:Animals; D001522:Behavior, Animal / Q000502:physiology; D001947:Breeding; D004285:Dogs / Q000235:genetics* / Q000254:growth & development / Q000502:physiology*; D004777:Environment; D005260:Female; D005387:Finland; D005820:Genetic Testing / Q000379:methods / Q000662:veterinary; D008297:Male; D008954:Models, Biological; D010641:Phenotype; D015203:Reproducibility of Results; D013177:Sports