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Hacia una ganadería sostenible en las Américas: oportunidades y desafíos. (conferencia magistral).

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Llos servicios ecosistémicos son esenciales para el desarrollo de una ganadería sostenible, donde el aprovechamiento y promoción de estos servicios no solo mejora la salud y productividad de las recursos naturales, sino que también contribuye a la sostenibilidad ambiental, económica y social de los productores y su entorno territorial y de los servicios conexos asociados a los diferentes actores incorporados en la producción, industrialización, transporte, servicios de apoyo, agronegocio, exportación, alimentación, etc.

Inbreeding and runs of homozygosity in creole sheep breeds. [Endogamia y series de homocigosidad en razas criollas de ovinos]. [abstract].

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INTRODUCTION: In livestock, the advancement of genotyping technology has introduced new methods for assessing inbreeding based on single nucleotide polymorphism. Homozygosity runs (ROH) provide a more accurate method for estimating past and recent inbreeding rates at the individual/population level compared to traditional pedigree-based estimations or in the absence of pedigree records. Furthermore, ROH metrics can be used for the identification of regions under strong selection and
provide insights into evolutionary trends over time.

Looking for the genes involved in local adaptation in sheep. (0342 - oral presentation).

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ABSTRACT.- Throughout their domestication, sheep have adapted to environmental heterogeneity, from the tropics to the highlands. Climate and human selection have shaped the genome and left genetic 'fingerprints' on breeds bred in diverse regions worldwide. The small ruminants have evolved to be highly efficient and provide
a valuable model for identifying the genetic pathways and mechanisms underlying adaptation.

Astylus atromaculatus (pollen beetle) gastrointestinal disease experimentally reproduced in sheep.

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ABSTRACT.- Intoxication of sheep and cattle by Astylus atromaculatus recently occurred in Uruguay and Argentina in association with severe drought. Although the disease was experimentally reproduced in sheep in the 1970s, there is limited information on clinical and pathologic findings of sheep experimentally intoxicated by this beetle. Here, we described the clinical, gross, and microscopic findings in 3 sheep orally dosed with A. atromaculatus (treatment group, TG) and in 2 control sheep (control group, CG) dosed with distilled water.

Impact of standing water level and observation time on remote-sensed canopy indices for rice nitrogen status monitoring.

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ABSTRACT.- The observation time and water background can affect the remote sensing estimates of the nitrogen (N) content in rice crops. This makes the use of vegetation indices (VIs) for N status monitoring and topdressing recommendations challenging, as the timing of panicle initiation and the water level in bays usually differ between farms even when managed using the same irrigation technique.

Influence of variance component estimates on genomic predictions for growth and reproductive-related traits in Nellore cattle.

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ABSTRACT.- This study aimed to estimate variance components (VCs) for growth and reproductive traits in Nellore cattle using two relationship matrices (pedigree relationship A matrix and pedigree plus genomic relationship H matrix), and records collected before and after genomic selection (GS) implementation. The study also evaluated how genomic breeding values (GEBV) are affected by variance components and discarding old records. The analysed traits were weight at 120 days (W120), weight and scrotal circumference at 450 days (W450 and SC450, respectively).