Effects of leptospira natural infection on reproductive traits of holstein heifers:preliminary results.
Strategies to mitigate greenhouse gas emissions from pasture-based sheep systems - an EU project consortium view. [15]
ABSTRACT. - An international project ('Grass To Gas', 2019-2024) to combine expertise and generate new knowledge for the reduction of the potent methane (CH4) greenhouse gas (GHG) from sheep is underway.
Modelling missing pedigree with metafounders and validating ssGBLUP evaluation for Uruguayan Holstein dairy cattle. [318]
ABSTRACT.- The objective of this study was to check the quality of single-step GBLUP (ssGBLUP) predictions in Uruguayan dairy cattle, with special focus on the modelling of missing pedigree defined as metafounders (MF).
Definition of reliabilities for models with metafounders. [289]
ABSTRACT.- For models with several base populations (Unknown Parent Groups or Metafounders), the usual definition of reliability is ill-posed. Here we propose to define reliability based on contrasts with one or several metafounders, leading to a sounder genetic interpretation. In the case of a single metafounder, our definition equals the definition of reliability for the classical animal model. This definition also allows expressing the reliability of contrasts of metafounders, which may be of interest to decide if their setup is estimable with sufficient reliability.
Association of genetic resistance to internal nematodes and production traits on feed efficiency and methane emissions in Corriedale lambs. [37]-
ABSTRACT.- Potential trade-off among weaning (WWT) and yearling weights (YWT), greasy fleece weight (GWT) genetic resistance to gastrointestinal nematodes assessed by faecal worm egg account (FEC), residual feed intake (RFI) and methane (CH4) and carbon dioxide (CO2) emissions were investigated in 217 Corriedale female lambs. Improving RFI was strongly associated with lower dry matter intake (DMI) and independent of metabolic body weight (MWT) and average daily gain (ADG).