Conclusiones:Bajo las condiciones de este estudio se concluye que las vacas del tratamiento IND presentaron una producción de LCS similar a la del tratamiento GRU, pero con menor consumo de concentrado por litro de leche producido. Esto sugeriría una mejor eficiencia en el uso del mismo cuando su asignación se hizo según los requerimientos de cada animal.

Abstract: Predicting the occurrence of the critical period for soybean?s yield determination is important for farmers to decide on variety and sowing date with the objective to expose this period (during which yield is mainly determined) to the best environmental conditions

CRONOTRIGO© 2.0 se inició en el marco de un proyecto financiado por PROCISUR en el que están involucrados grupos de investigación de Argentina, Paraguay,Uruguay y Chile. El modelo CRONOTRIGO© 2.0 ya puede utilizarse en Argentina en el dominio http://cronotrigo.agro.uba.ar/ y para este año (2021) se expandirá al resto de los países involucrados en el proyecto PROCISUR (coordinado por la Dra. Fernanda G. González, EEA INTA Pergamino).

CRONOTRIGO© 2.0 se inició en el marco de un proyecto financiado por PROCISUR en el que están involucrados grupos de investigación de Argentina, Paraguay,Uruguay y Chile. El modelo CRONOTRIGO© 2.0 ya puede utilizarse en Argentina en el dominio http://cronotrigo.agro.uba.ar/ y para este año (2021) se expandirá al resto de los países involucrados en el proyecto PROCISUR (coordinado por la Dra. Fernanda G. González, EEA INTA Pergamino).

Using the data recorded in the National Genetic Evaluation System of the Australian Merino Breed (20,335 animals and 13,497 production records), the genetic parameters were estimate using restricted maximum likelihood methodology, applied to a multiple trait animal model for the five wool traits evaluated routinely:Greasy Fleece Weight (GFW), Clean Fleece Weight (CFW), Fibre Diameter (FD), Staple Length (SL) and Body Weight (BW). The heritabilities for these traits were 0.39, 0.39, 0.67 0.48 and 0.37, respectively.

ABSTRACT. In the recent years, the sheep production in Uruguay has experienced important changes. Every year, lamb meat production has gained significance. For this reason, many efforts are focusing in increase the lamb meat production (growth, reproduction). An alternative for that is the use of non traditional breeds. Four biotypes were evaluated for reproduction performance. The base flock of Polwarth ewes was inseminated with semen from the following breeds:Il de France (IF), East Friesian (EF), Texel (T) and Polwarth or Ideal (I).

ABSTRACT. One of the limiting factors in dairy production in hot climates is heat stress (Costa et al., 2002). Under heat, animals produce less and have lower reproduction rates (Kadzere et al., 2002). Management devices that reduce the impact of high temperature and humidity on the animal are available, but they are not fully efficient and not all production systems can afford them. Higher heat tolerance can be achieved by selecting or crossbreeding more heat-tolerant animals.

ABSTRACT. The traditional approach to identify quantitative trait loci (QTL) in most traits has been based on the combined analysis of molecular and phenotypic information by searching for significant associations. Different methodologies are available to find the location of a QTL on a chromosome and to estimate the additive and/or dominant effects. However, the knowledge of biological processes underlying the expression of a specific trait has not been expressly included in the standard techniques.