SUMMARY - A total of 1058 animals from 23 different breed combinations (86% steers, 14% heifers) were slaughtered with an average age of 2½ years between 1996 and 2001. Heritabilities and genetic correlations were estimated for the following traits:weight at 12, 15 and 18 months of age, slaughter and carcass weights (hot carcass weight, pistola weight, valuable cuts weight), ribeye area, subcutaneous fat thickness and subcutaneous fat thickness at P8. The posterior mean of the heritability for live weights increases with age, from 0.33 at 12mo to 0.58 at the slaughter weight.

ABSTRACT - With an ever-increasing number of genotyped animals, there is a question of whether to include all genotypes into single-step GBLUP (ssGBLUP) evaluations or to include only genotyped animals with phenotypes and use indirect predictions (IP) for the remaining young genotyped animals. Under ssGBLUP, SNP effects can be backsolved from GEBV, and IP can be calculated as the sum of SNP effects weighted by the gene content.

Resumiendo: - Lograr una buena cobertura es el ?mejor herbicida? - Supresión de entre 80 y 90 % de la biomasa de malezas con 30 a 40 kg/ha de avena negra. - Bajas dosis de herbicidas en otoño llevan al rolado con una cobertura libre de malezas ? reducción de la reproducción de malezas resistentes; - Desecación sin uso de herbicidas o dosis reducidas ? ROLADO; - Momento del rolado ? Especie dependiente; - Sin diferencias en la implantación ni el rendimiento de soja; - Interferencia en la germinación de especies estivales - buena cobertura y buen rolado.

EQUIPO DE TRABAJO: INIA:S. Pereyra, M. Castro, M. Díaz(R), S. Germán(R) , D. Vázquez, M. Quincke, A. Cal, G. Tiscornia, P. Silva, N. Gonzalez, D. Bentos, W. Alvarez, S. Rabaza, M. Rodríguez, V. Domeniguini, L. Sevillano, M. Raffo, M. Tejeira. Facultad de Química, UDELAR:Microbiología:S. Vero. G. Garmendia, M. Cabrera, M. Umpiérrez , G. Brancatti. Polo Tecnológico de Pando:A. Rodríguez, C. Pendas.Dpto. de Química del Litoral- CENUR:L. Pareja, B. Taborda. Facultad de Agronomía, UDELAR:C. Pérez, C. Francia.MNECC, MNT Universidad de Minnesota:R. Dill-Macky, J. Stanton CIMMYT:P. Singh, C.

O tumor estromal gastrointestinal (?gastrointesinal stromal tumor?, GIST) é uma neoplasia mesenquimal originada de células intersticiais de Cajal, localizadas entre as camadas musculares do trato gastrointestinal. O tumor foi descrito em várias espécies animais, mas até o momento não há relatos em ovinos.