ABSTRACT. Current genetic evaluations are performed separately for each breed. Multiple breed genetic evaluations, however, assume a common base among breeds, enabling producers to compare cattle of different breed makeup. Breed and heterosis effects are needed in a multibreed evaluation because databases maintained by breed associations include few crossbred animals, which may not be enough to accurately estimate these effects.

RESUMEN. Un consorcio de siete socios de seis países iberoamericanos ha evaluado diferentes propiedades de una colección de Papas Nativas. Las evaluaciones incluyen resistencias a diferentes plagas y enfermedades, cualidades nutricionales y sustancias perjudiciales, comportamiento agronómico, análisis de la aptitud para el procesado y calidad organoléptica. Se han encontrado características favorables para todos los caracteres estudiados en algunos de los genotipos de Papas Nativas.

ABSTRACT:Genetic parameters for weaning weight (WW) and cow weight (CW) at different ages, CW1 to CW5 (24-42, 43-54, 55-66, 67-78, 79 to 120 months respectively) were estimated through a multiple trait model for the Hereford breed in Uruguay. Data consisted of 17875 WW, 7235 CW1, 6483 CW2, 4805 CW3, 3133 CW4 and 4038 CW5. Posterior mean marginal estimates were obtained using Bayesian inference with the GIBBSF90 program. WW heritability was 0.13±0.03 using a dataset of 17875. Estimated heritabilities for CW1 through CW5 were 0.39±0.07, 0.48±0.04, 0.68±0.05, 0.59±0.06 and 0.47±0.08.