INVESTIGADORES
PERAL GARCIA Pilar
artículos
Título:
Implication of Population Structure in the Resolution of cattle Stealing cases
Autor/es:
LIRON, J.P.; RIPOLI, M.V.; PERAL-GARCIA, P; GIOVAMBATTISTA,G.
Revista:
JOURNAL OF FORENSIC SCIENCES
Editorial:
Blackwell
Referencias:
Año: 2007 vol. 52 p. 1077 - 1081
ISSN:
0022-1198
Resumen:
Estimation of population subdivision using genetic markers shows that genetic differentiation in livestock and pet breeds is significantly
higher than in human populations. Nevertheless, the influence of population substructure and sample size on match probability has not been
extensively analyzed in domestic species. To evaluate the magnitude of the subpopulation effect on estimation of match probabilities in bovine robbery
cases, we calculated and compared the match probabilities obtained from cattle breed databases using both real, adjudicated cases from the
Buenos Aires Province (Argentina), as well as simulated data. While the Balding and Nichols correction, when applied to the population database
used in the case, produce a more conservative value favorable to the defendant, the match probabilities calculated using the simple product estimator
produce a value favorable to the prosecution. We suggest an alternative procedure that can be used. The method consists of choosing the highest
value from all match probabilities calculated from the database of each breed. This approach represents an intermediate and more accurate estimation
of match probability, although it still produces a slight conservative value favorable to the defense.