ABSTRACT The body weight (BW) of an animal is a vital economic trait that might help in decision-making in the handling of animals. The objective of the present study was to develop equations for the prediction of BW in Pelibuey sheep using scrotal circumference (SC). The BW (23.40 ± 6.96 kg) and SC (20.25 ± 6.19 cm) have been recorded in 405 male Pelibuey at the Southeastern Center for Ovine Integration, Mexico. Linear, logarithmic, quadratic, exponential, cubic, and power regression models were used for data analysis. Pearson correlation (R), Coefficient of determination (R2), Adjusted coefficient of determination (Adj.R2) Root mean square error (RMSE), Akaike information criterion (AIC), and Bayesian information criterion (BIC) were used to select the best model. Power regression model showed the highest R (0.93), R2 (0.86), Adj.R2 (0.86) and lowest RMSE (0.02), AIC (-989.44) and BIC (-981.44). The current study suggests that SC might be used as the only predictor for BW of growing Pelibuey sheep raised under tropical conditions.

RESUMO O peso corporal (PC) do animal é uma característica econômica importante, que pode auxiliar na tomada de decisões no manejo dos animais. O objetivo do presente estudo foi desenvolver equações para a predição do PC em ovinos Pelibuey por meio da circunferência escrotal (CE). O PC (23,40±6,96kg) e a CE (20,25±6,19cm) foram registrados em 405 ovinos machos da raça Pelibuey no Centro de Integração Ovina da Região Sudeste do México. Os modelos lineares, logarítmicos, quadráticos, exponenciais, cúbicos e de regressão de potência foram utilizados para a análise dos dados. A correlação de Pearson (R), o coeficiente de determinação (R2), o coeficiente de determinação ajustado (Adj.R2), o erro do quadrado médio (EQM), o critério de informação de Akaike (AIC) e o critério de informação bayesiano (BIC) foram usados para selecionar o melhor modelo. O modelo de regressão de potência apresentou maiores R (0,93), R2 (0,86), Adj.R2 (0,86) e menores EQM (0,02), AIC (-989,44) e BIC (-981,44). O estudo atual sugere que a CE pode ser usada como um único preditor para o PC de ovinos Pelibuey em crescimento criadas em condições tropicais.

ABSTRACT The objective of the present study was to evaluate the effect of lipopolysaccharide (LPS) administration on activation and apoptosis of primordial follicles. There was no difference in the total number of follicles as well as in the different types of follicles. Furthermore, the LPS challenge didn’t modulate the expression of genes related with ovarian reserve (HAM), oocyte survival (Survivin), activation rate (Pten, KIT, KITL1, KITL2, AKT1, SIRT1), and follicular abnormalities. Therefore, the LPS exposure with 24h interval had no effect on activation rate and primordial follicles abnormalities, and also had no effect on expression of anti-apoptotic genes and genes related with ovarian reserve, oocyte survival, activation rate, and primordial follicles abnormalities.

RESUMO O objetivo do presente estudo foi avaliar o efeito da administração de lipopolissacarídeo (LPS) na ativação e a apoptose de folículos primordiais. Dez novilhas saudáveis (Bos taurus taurus), com idade média de 14 meses, alojadas em sistema de confinamento e alimentadas com TMR, foram utilizadas neste experimento. Os animais foram distribuídos aleatoriamente em dois grupos: grupo LPS (LPS; n = 5), que recebeu duas injeções intravenosas de 0,5μg/kg de peso corporal de lipopolissacarídeo (Sigma Aldrich®) diluído em 2mL de solução salina (0,9% de NaCl), com intervalo de 24h; e grupo controle (CTR; n = 5), que recebeu duas injeções intravenosas de 2mL de solução salina (0,9% de NaCl), com intervalo de 24h. A primeira injeção de LPS foi realizada no d 1, e no d 5 os animais foram abatidos, os ovários foram pesados e as amostras dos ovários foram coletadas para avaliação histológica e molecular. Não houve diferença no número total de folículos, bem como nos diferentes tipos de folículos. Além disso, o desafio com LPS não modulou a expressão de genes relacionados à reserva ovariana (HAM), à sobrevivência oocitária (Survivin), à taxa de ativação (Pten, KIT, KITL1, KITL2, AKT1, SIRT1) e às anormalidades foliculares. Portanto, a exposição ao LPS com intervalo de 24h não teve efeito sobre a taxa de ativação e as anormalidades dos folículos primordiais, bem como não teve efeito sobre a expressão de genes antiapoptóticos e de genes relacionados com a reserva ovariana, a sobrevivência oocitária, a taxa de ativação e as anormalidades dos folículos primordiais.

Abstract In Mexico, the use of medicinal plants has been an ancestral practice for the treatment of health, ranging from the cure of a common complaint to cancer. Mexico has a great diversity of medicinal plants used by its people throughout the country to treat different ailments. The present work aimed to evaluate the importance and use of medicinal plants in 13 rural communities in the municipality of Pachuca de Soto, Hidalgo. A total of 97 ethnobotanical surveys were applied to locals; The data collection considered socioeconomic and health aspects, and information on the main plant uses. The informants aged between 50 and 54 years cited a higher number of medicinal plants. A total of 90 species, 82 genera, and 45 families were registered. Asteraceae, Lamiaceae, and Rutaceae were the best-represented families. Likewise, in the ethnomedicinal indexes with which the cultural importance of the species was estimated, the taxa Chamaemelum nobile (L.) All. and Ruta chalepensis L. presented the highest values and uses for diseases of the digestive and respiratory systems. These species are the ones with the greatest medicinal use and are mentioned in 90% of the interviewed population.

Resumen En México, el uso de plantas medicinales ha sido una práctica ancestral para el tratamiento de la salud, que va desde la cura de un padecimiento común hasta el cáncer. México cuenta con una gran diversidad de plantas medicinales utilizadas por su gente a lo largo del país para tratar diferentes dolencias. El presente trabajo tuvo como objetivo evaluar la importancia y uso de las plantas medicinales en 13 comunidades rurales del municipio de Pachuca de Soto, Hidalgo. Se aplicaron un total de 97 encuestas etnobotánicas a pobladores locales; La recolección de datos consideró aspectos socioeconómicos y de salud, e información sobre los principales usos de las plantas. Los informantes con edades entre 50 y 54 años citaron un mayor número de plantas medicinales. Se registraron un total de 90 especies, 82 géneros y 45 familias. Asteraceae, Lamiaceae y Rutaceae fueron las familias mejor representadas. Asimismo, en los índices etnomedicinales con los que se estimó la importancia cultural de la especie, los taxones Chamaemelum nobile (L.) All. y Ruta chalepensis L. presentaron los mayores valores y usos para enfermedades de los aparatos digestivo y respiratorio. Estas especies son las de mayor uso medicinal y se mencionan en el 90% de la población entrevistada.

Abstract This study was conducted to assess the impact of petroleum hydrocarbon toxicity on growth, fresh biomass production, photosynthetic pigments and antioxidant response in Leersia hexandra after 180 days. A completely randomized experimental design was performed under semi-controlled conditions in a micro-tunnel, with four treatments and four replicates per treatment. The concentrations were: 0 (control), 30, 60 and 90 g kg-1 of total petroleum hydrocarbons (TPH). The results showed that TPH concentrations in the soil affected growth by reducing height (r= -0.940**), primary root length (r= -0.961**) and aerial fresh matter production (r= - 0.901**), however, they induced an increase in the number of shoots in the tiller (r= 0.970**), number of primary roots (r= 0.995**), production of fresh root matter (r= 0.882**), content of photosynthetic pigments and total proteins (TPr) (r= 0.716**). When L. hexandra is exposed to high doses of HTP (60 and 90 g kg-1) it does not show evidence of oxidative stress because the H2O2 content in these concentrations were statistically equal to the control, this could be related to the relationship positive that it has with total phenols (r = 0.525*) because of soil contamination by oil.

Resumen: El presente estudio se realizó para conocer el impacto de la toxicidad del hidrocarburo del petróleo en el crecimiento, producción de biomasa fresca, pigmentos fotosintéticos y respuesta antioxidante en Leersia hexandra al día 180. Se realizó un diseño experimental completamente al azar en condiciones semicontroladas en microtúnel, con cuatro tratamientos y cuatro replicas por tratamiento. Las concentraciones fueron: 0 (control), 30, 60 y 90 g kg-1 de hidrocarburos totales del petróleo (HTP). Los resultados mostraron que las concentraciones de HTP en el suelo afectaron significativamente el crecimiento al reducir la altura (r= -0.940**), longitud de raíz primaria (r= -0.961**) y producción de materia fresca aérea (r= -0.901**), sin embargo, indujeron un aumento significativo en el número de retoños en el macollo (r= 0.970**), número de raíces primarias (r= 0.995**), producción de materia fresca radical (r= 0.882**), contenido de pigmentos fotosintéticos y proteína total (PrT) (r= 0.716**). Cuando L. hexandra se ve expuesta a dosis altas de HTP (60 y 90 g kg-1) no muestra evidencia de estrés oxidativo debido a que el contenido de H2O2 en estas concentraciones fueron estadísticamente igual al control, esto pudiera estar relacionado a la relación positiva que tiene con los fenoles totales (r = 0.525*) por consecuencia de la contaminación del suelo por petróleo.

Abstract Two identical homemade prototypes are used to monitoring the tide levels on two strategic points of the Serinhaém estuary. This monitoring was realized along a period close to the new moon phase. From the analysis of the experimental results, the average height of the tide is determined between each period of high-tide and low-tide. These estimations show discrepancies minors than half order of magnitude, compared to the theoretical predictions of the static and dynamic oceanic tide models. Also, the amplification effects of the tide in the estuary head can be quantified exhibiting a maximum gain of 1.33, which is observed in the new moon phase.

FIHOA was developed to evaluate the functional capacity of patients with OA hands. Objetive: To validate FIHOA in patients with RA. Methods: Analytical, observational, prospective cross-sectional study. Consecutive patients with diagnosis of RA (ACR/EULAR 2010) were included. Demographic and RA characteristics were recorded. Patients completed the following self-administered questionnaires: FIHOA, HAQ-A, HAQ-UP-A and Quick DASH. For a patient subgroup, an occupational therapist performed an objective evaluation of the functional capacity of the hands using the SODA-A. Reproducibility was assessed. Statistical analysis: Descriptive statistics. Reliability with the Cronbach test. Construct validity with Spearman correlation. Reproducibility with test-retest reliability. Linear regression model. Results: One hundred patients were included. Cronbach's alpha test was 0.94. There were no redundant questions. FIHOA showed an excellent correlation with HAQ-A (r=0.89); HAQ-UP-A (r=0.89); Quick DASH (r=0.90) and SODA-A (r=-0.80); and a good correlation with DAS28-ERS (r=0.65) and with other disease parameters. Questionnaire reproducibility was 0.73. A multiple linear regression showed morning stiffness as the main determinant of FIHOA, followed by glucocorticoid use and patient global assessment. Conclusion: FIHOA was found to be reliable, valid and reproducible in patients with RA.

El FIHOA fue desarrollado para evaluar la capacidad funcional de pacientes con OA de manos. Objetivo: Validar FIHOA en pacientes con AR. Métodos: Estudio analítico, observacional prospectivo de corte transversal. Se incluyeron pacientes consecutivos con diagnóstico de AR (ACR/EULAR 2010). Se consignaron datos demográficos y características de la enfermedad. Todos los pacientes completaron los siguientes cuestionarios autoadministrados: FIHOA, HAQ-A, HAQ-UP-A y Quick DASH. En un subgrupo de pacientes, una terapista ocupacional valoró la capacidad funcional de la mano por medio del test de SODA-A. Se evaluó la reproducibilidad de FIHOA. Análisis estadístico: Estadística descriptiva. Confiabilidad con test de Cronbach. Validez de constructo con correlación de Spearman. Reproducibilidad test re-test. Modelo de regresión lineal. Resultados: Se incluyeron 100 pacientes. La prueba alfa de Cronbach fue de 0,94. No se evidenciaron preguntas redundantes. El FIHOA mostró excelente correlación con HAQ-A (r=0,89); HAQ-UP-A (r=0,89); Quick DASH (r=0,90) y SODA-A (r=-0,80); y buena correlación con DAS28-ERS (r=0,65), y con otros parámetros de la enfermedad. La reproducibilidad fue 0,73. La regresión lineal múltiple mostró como principal determinante del FIHOA a la presencia de rigidez matinal seguida por el uso de corticoides y el EVA general de pacientes. Conclusión: El FIHOA resultó ser confiable, válido y reproducible en pacientes con AR.

Abstract The quaternary chalcogenide compound Ag2MnSnS4 belonging to the system I2-II-IV-VI4 and synthesized by the melt and anneal technique, was characterized by Rietveld refinement of the powder X-ray diffraction data and differential thermal analysis (DTA). It was found that Ag2MnSnS4 crystallizes in the orthorhombic space group P m n 2 1, with unit cell parameters a = 8.1705 5 Å, b = 6.9413 5 Å, c = 6.6532 5 Å, and V = 377.33 5 Å 3, in a wurtzite-stannite structure. The DTA indicates that this compound melts at 790°C and that the phase relations which occurs in the material would be: α → α + α 1 → α 1 → α 1 + β → β → β 1 + L → L, were α is the orthorhombic wurtzite-stannite P m n 2 1 structure; α 1 is a high temperature modification; and β and β 1 are the zinc-blende structure and its high-temperature modification, respectively.

Abstract: Degradation of paper through time can be measured by monitoring the intensity changes in the band located at 620 nm of its emission fluorescence spectra. The behavior of this band is closely related to the structural stability of the short cellulose chains. A fast degradation of these cellulose chains, mainly lignin, translates in the rapid denaturation of paper occurring at its first aging state. This work proposes a method to reincorporate short cellulose chains in the structure of aged paper through its immersion during 24 h in a solution based on ethyl alcohol and extracts of wood pieces. Results of fluorescence spectra measurements indicate that the short cellulose chains in the solution get embedded in the old paper, making the shape and intensity of the fluorescence emission spectra peaks of new and old paper almost indistinguishable. This behavior provides a desirable approach to analyze, preserve and restore aged paper documents.

Abstract The effect of the addition of an organic mineral (Bioplex Quality Meat) and a complement of African oil palm fiber as supplementary forage in the gain and digestibility of fattening steers in grazing under tropical conditions was studied. A total of 40 crossbreed steers (Bos taurus x Bos indicus), with average initial live weight of 276 ± 28 kg for 120 d were used. They were fed individually with 1 kg d-1 of concentrate (14 % CP) and African oil palm fiber. A completely randomized design was applied, according to the following treatments: 1)control, only grazing (CG); 2) grazing + African oil palm fiber (AOPF-0); 3) grazing + African oil palm fiber + 15 g animal-1 d-1 of Bioplex Quality Meat (AOPF-15) and 4) grazing + African oil palm fiber + 30 g animal-1 d-1 Bioplex Quality Meat (AOPF-30). The daily weight gain of the steers was improved with Bioplex Quality Meat, with a linear effect (P <0.01); (CG =492, AOPF-0 = 554, AOPF-15 = 637, AOPF-30 = 792 g d-1 Bioplex Quality Meat). This was associated with the increase in intake (linear effect P <0.05) of African oil palm fiber (CG = 0.0, AOPF- 0 = 3.06, AOPF-15 = 3.08, AOPF-30 = 3.36 kg d-1) and higher DM digestibility (P <0.05) with respect to the control group (CG = 67.13, AOPF-0 = 74.26, AOPF-15 = 72.29, AOPF-30 = 72.46 %).There was no effect on total forage or DM intake. It is concluded that Bioplex Quality Meat increases the nutrient availability of the African oil palm fiber, which improves the daily weight gain.

Resumen Se estudió el efecto de la adición de un mineral orgánico (Bioplex Quality Meat) y un complemento de fibra de palma de aceite africana como forraje complementario en la ganancia y digestibilidad de novil- los de engorde en pastoreo, en condiciones tropicales. Se utilizaron 40 novillos cruzados (Bos taurus x Bos indicus), con peso vivo inicial promedio de 276 ± 28 kg durante 120 d. Se alimentaron en forma individual con 1 kg d-1 de concentrado (14 % PC) y fibra de palma de aceite africana. Se aplicó un dis- eño completamente al azar, de acuerdo con los tratamientos siguientes: 1) testigo, solo pastoreo (TP); 2) pastoreo + fibra de palma de aceite africana (FPAA-0); 3) pastoreo + fibra de palma de aceite africana + 15 g animal-1 d-1 de Bioplex Quality Meat (FPAA-15) y 4) pastoreo + fibra de palma de aceite africana +30 g animal-1 d-1 Bioplex Quality Meat (FPAA-30). Se mejoró la ganancia diaria de peso de los novillos con Bioplex Quality Meat, con un efecto lineal (P < 0.01); (TP = 492; FPAA-0= 554; FPAA-15 = 637; FPAA-30 = 792 g d-1 Bioplex Quality Meat). Esto se asoció al incremento en el consumo (efecto lineal P < 0.05) de la fibra de palma de aceite africana (TP = 0.0; FPAA-0 = 3.06; FPAA-15 = 3.08; FPAA-30= 3.36 kg d-1) y a mayor digestibilidad de la MS (P < 0.05) con respecto al grupo testigo (TP = 67.13; FPAA-0 = 74.26; FPAA-15 = 72.29; FPAA-30 = 72.46 %). No se detectó efecto en el consumo total de forraje ni de MS. Se concluye que Bioplex Quality Meat aumenta la disponibilidad de nutrientes de la fibra de palma de aceite africana, lo que mejora la ganancia diaria de peso.

Abstract: Objective: To analyze the net absorption spectra of EBT2 and EBT3 radiochromic films to describe their influence on the behavior of dose-response curves. Methodology: The films were irradiated in a linear accelerator of 6 MV. The net absorption spectra were obtained with a UV / VIS spectrophotometer. Dose-response curves were obtained with a scanner, a He-Ne laser and a spectrophotometer. Results: The absorption spectrum of the EBT2 shows three focused absorption bands that retain position and increase their intensity as a function of dose, however, this behavior is not observed in EBT3 films. The dose-response curve shows maximum sensitivity using the spectrophotometer, but does not show a defined behavior. Implications: Generation of new knowledge for the creation of new optical systems capable of amplifying the responsiveness of the films. Originality: Show the correlation between net absorption spectra and their influence on dose-response curves in three different optical systems. Conclusions: The behavior of absorption spectra combined with the behavior of the dose-response curves helps to discard the use of optical systems that do not guarantee a reliable clinical use.

Resumen: Objetivo: Analizar los espectros de absorción neta de las películas radiocrómicas EBT2 y EBT3 para describir su influencia en el comportamiento de las curvas de dosis-respuesta. Metodología: Las películas se irradiaron en un acelerador lineal de 6 MV. La obtención de los espectros de absorción neta se realizó con espectrofotómetro UV/VIS. Las curvas de dosis-respuesta se obtuvieron con un escáner, un láser He-Ne y un espectrofotómetro. Resultados: El espectro de absorción de las EBT2 muestra tres bandas de absorción centradas que conservan la posición y aumentan su intensidad en función de la dosis, sin embargo, este comportamiento no se observa en las películas EBT3. La curva dosis-respuesta muestra la máxima sensibilidad utilizando el espectrofotómetro, pero no muestra un comportamiento definido. Implicaciones: Generación de nuevos conocimientos para la creación de nuevos sistemas ópticos capaces de amplificar la sensibilidad de la respuesta de las películas. Originalidad: Mostrar la correlación entre los espectros de absorción neta y su influencia en las curvas dosis-respuesta en tres diferentes sistemas ópticos. Conclusiones: El comportamiento de los espectros de absorción aunado al comportamiento de las curvas dosis-respuesta nos ayuda a descartar el uso de sistemas ópticos que no garanticen un uso clínico confiable.

Abstract: Culture filtrates and mycelia extracts (methanol and ethyl acetate) from nine selected Mexican tropical fungal strains were tested against second stage juveniles (J2) of Meloidogyne incognita, in vitro conditions. The micromycetes Acremonium kiliense TA31, Aspergillus sp. 2XA5, Gliocladium sp. MR41, Selenosporella sp. MR26, Stagonospora sp. TA34, and four unidentified strains (TA13, 2TA6, 2TA7, and 2XA7) were cultured on Czapeck-Dox medium for 14 days and mycelial mat was separated by filtration for metabolites extraction. Aspergillus sp. 2XA5 and Selenosporella sp. MR26 showed the highest nematotoxic activity both in culture filtrates (100 % mortality) and methanol extracts (> 90 % mortality). The lowest EC50 (0.08 mg mL-1) was exhibited by the methanol extract of the unidentified strain 2XA7. The results obtained indicate that tropical mycobiota have potential as biological control agents of plant parasitic nematodes.

Resumen: Filtrados de cultivos y extractos de micelio (acetato de etilo y metanol) de nueve cepas fúngicas Mexicanas tropicales se evaluaron en condiciones in vitro contra juveniles de segundo estadio (J2) de Meloidogyne incognita. Los micromicetos Acremonium kiliense TA31, Aspergillus sp. 2XA5, Gliocladium sp. MR41, Selenosporella sp. MR26, Stagonospora sp. TA34 y cuatro cepas no identificadas (TA13, 2TA6, 2TA7 y 2XA7) se cultivaron en medio Czapeck-Dox durante 14 días y la masa micelial se separó por filtración para la extracción de metabolitos. Aspergillus sp. 2XA5 y Selenosporella sp. MR26 mostraron la mayor actividad nematóxica, tanto en filtrados de cultivo (100% de mortalidad) como en extractos metanólicos (> 90% de mortalidad). La CE50 más baja (0.08 mg mL-1) se obtuvo con el extracto de metanol de la cepa 2XA7 no identificada. Los resultados obtenidos indican que la micobiota tropical tiene potencial como agentes de control biológico de nematodos fitopatógenos.

Neste trabalho analisamos o rolamento de um corpo sobre um plano inclinado relaxando a hipótese de corpo rígido, isto é, consideramos o corpo como deformável. A partir das equações de movimento obtemos uma expressão analítica para a aceleração do centro de massa do corpo. Mostramos que casos conhecidos na literatura podem ser obtidos como casos particulares da nossa expressão. Adicionalmente, obtemos uma expressão para o coeficiente de atrito de rolamento o qual pode ser calculado a partir de medidas experimentais realizadas num plano inclinado.

In this work we have examined the motion of a body that rolls on an inclined plane, without the assumption of a rigid body. Under these conditions, the body may suffer small deformations. From the equations of motion we obtain an analytical expression for the acceleration of the center of mass. We show that some cases reported in the literature can be obtained as special cases of our expression. In addition, we obtain an expression for the friction coefficient of rolling, which can be calculated from experimental measurements performed on an inclined plane. These results can be used for students of physics to do a deeper analysis of the friction phenomenon associated with rolling bodies.

Zinc-blende GaAs layers were prepared on (100) Si and glass substrates by r.f. magnetron sputtering. The morphology of GaAs layers is analyzed by means of atomic force microscopy (AFM) and scanning electron microscopy (FE-SEM), to determine the sample topography and growth type. The compositional analysis was performed by means of energy dispersive X-ray spectroscopy (EDS), in order to obtain information of the atomic percentages of the elements and their spatial distribution in the samples. The optical properties of the layers are discussed from the results of UV-Vis absorption, and Photoacoustic spectroscopy (PAS). Finally, the Raman shift of the GaAs phonon modes are studied as function of the penetration depth of laser wavelength used to excite the sample on Raman microscopy.

To characterize the Normandobreed in Colombia, the multivariate analysis on 1186 data allowed the identification of four groups within the breed. The minority group was the number 1 (8.2 % of the sampled population), while the larger is group 3 (53.0 % of the population). Adjusted lactation of cows in group 2 averaged 5608.4 kg and reproductive parameters as calving interval (433.4 days) and age at first service (28 months); 80.6 % of animals in this group are under intensive supplemented production systems. In group 3, adjusted lactation was 3317.9 kg, and it had the best reproductive parameters, such as 399.2 days calving interval, and 25.7 months of average age at first service; 48.3 % of the cows belonging to this cluster are under improved extensive production systems, and 49.9 % under intensive systems with supplements. The prevailing (71.9 % of the population) milking system in this group is manual and twice per day.

Para caracterizar la raza Normando en Colombia se utilizó el análisis multivariado que permitió la identificación de 4 grupos dentro de la raza a partir de 1186 datos de hembras registradas. El grupo minoritario fue el número 1 (8,2 % de la población muestreada), mientras el grupo mayoritario fue el 3 (53,0 % de la población). Destaca el grupo 2 con vacas con lactancias ajustadas promedio de 5608,4 kg y con intervalo entre partos (IEP) de 433,4 días y edad al primer servicio de 28 meses. El 80,6 % de los animales pertenecientes a este grupo se encontraron en sistemas productivos intensivos suplementados. En el grupo 3, se encuentran animales con lactancias ajustadas de 3317,9 kg, y los mejores parámetros reproductivos: IEP de 399,2 días, y edad al primer servicio de 25,7 meses. El 48,3 % de las vacas pertenecientes a este conglomerado se encuentran en sistemas productivos extensivos mejorados, y el 49,9 % en sistemas intensivos suplementados. El sistema predominante de ordeño para este grupo es el doble de tipo manual al cual pertenece el 71,9 % de la población.