ABSTRACT.- National dairy evaluations use mostly multistep methods, where a nongenomic BLUP evaluation is followed by extraction of pseudo-phenotypes, genomic analyses, and merging nongenomic and genomic evaluations. With genomic preselection and many females genotyped, pseudo-phenotypes are biased, and it is hard to accommodate female genotypes fully. Such problems were successfully solved in other species by ssGBLUP, but large biases and expensive computing were experienced in dairy. This paper documents several improvements that made ssGBLUP feasible for national dairy evaluations.

Presentación del Proyecto:i) Nuevo sistema planteado para el Campo de Migues. (Plataforma para realizar "Investigación de Sistema") -- ii) Proyecto CSIC VUSP Modalidad 1 en desarrollo.

ABSTRACT.- Variability of methane (CH4) emission in sheep and impact of selecting low emitting individuals are investigated as part of greenhouse gas mitigation strategies. This study aimed to estimate the correlations between CH4 and different production traits in Australian Merino.

ABSTRACT.- Breeding sheep for low methane (CH4) emissions is an attractive mitigation strategy which implementation requires exploring the impact on other traits. This study aimed to explore these associations by comparing the performance of animals classified by CH4 emission.

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.