ABSTRACT.- Twin lambs establish a social attachment soon after birth, which implies that they prefer to interact with each other during the suckling period. However, the role of the mother's presence in maintaining the social attachment between twins has been scarcely studied. The aims of this study were to characterize the dynamics of the distance between twin lambs during lactation until three months after weaning, and to determine the impact of the mother in this regard.

ABSTRACT.- Genetic improvement in small countries rely heavily on foreign genetics. In an importing country such as Uruguay, consideration of unknown parent groups (UPG) for foreign sires is essential. However, the use of UPG in genomic model evaluations may lead to bias in genomic estimated breeding values (GEBV). The objective of this study was to study different models including UPG or metafounders (MF) in the Uruguayan Holstein evaluation and to analyze bias, dispersion, and accuracy of GEBV predictions in BLUP and single-step genomic BLUP (ssGBLUP). © 2024, The Authors.

ABSTRACT.- Isolation of high quality and quantity genomic DNA is essential for molecular studies. It is crucial to select a non-invasive and straightforward technique to ensure the efficient collection of DNA, particularly at the farm level. The aim of this study was to determine if nasal swabs are an appropriate biological matrix to obtain good quality genomic DNA suitable for SNP genotyping. In this study, two biological matrices (blood and nasal swabs) were evaluated and compared for the isolation of genomic DNA obtained from 15 female Texel sheep.

La agricultura moderna convencional ha experimentado procesos de intensificación y especialización asociados a un aumento del uso de energía fósil por el incremento en el uso de agroquímicos, mecanización y riego. El microbioma agrícola es clave en la transición hacia sistemas agrícolas sostenibles. En esta sección se presentarán algunos avances de la comunidad científica en el estudio y comprensión del microbioma agrícola.

Currently, is still unclear how agriculture intensification changes the soil microbiome and soil properties with implications for plant performance. Two Uruguayan long-term field experiments (LTEs) were studied, where we measured soil physicochemical properties, plant performance and soil and rhizosphere microbiota, by high-throughput amplicon sequencing.

Una fracción sustantiva de la diversidad microbiana está íntimamente asociada a distintos órganos o compartimentos vegetales y contribuyen significativamente al crecimiento saludable de la planta por medio de mecanismos que reducen el impacto negativo de fitopatógenos.

ABSTRACT.- Paspalum notatum Flüggé is a subtropical grass native from the Americas and one of the main components of the subtropical South American grasslands. Although P. notatum exhibits a high forage productivity and persistence, some limitations are observed in the species, such as forage quality due to high lignin content. The development of efficient tissue culture and plant transformation protocols in cultivars for forage production are necessary to embrace novel genetic improvement through transgenesis and genome editing.

CONTENIDO. -- Síntesis de la situación agroclimática de mayo -- Perspectivas climáticas trimestrales elaboradas por el IRI de la Universidad de Columbia (Más información puede encontrarse en el sitio del IRI:http://www.iri.columbia.edu) -- Índice de vegetación (NDVI) -- Precipitaciones -- Porcentaje de agua disponible (PAD) -- Agua no retenida (ANR) -- Índice de bienestar hídrico (IBH) -- Perspectivas climáticas jun-jul-ago elaboradas por el IRI de la Universidad de Columbia. -- Destacamos para este mes:INIA Termomín.

Mediante un enfoque ad-hoc que puede extenderse a cualquier cultivo y situación, nuestro objetivo fue estimar hasta dónde sería posible expandir e intensificar la producción sojera sin comprometer los recursos naturales. Adoptamos un modelo espacial con múltiples escenarios para estimar el área potencial y rendimientos del cultivo. Impusimos varias restricciones en función del riesgo de erosión, uso actual y alternativo del suelo, costos de transporte y logística y calculamos los márgenes económicos del cultivo.