BACKGROUND The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) B.1.1.33-derived lineage named N.9 was described recently in Brazil and it’s considered a potential variant of interest (VOI) due to the presence of E484K substitution at the receptor-binding domain (RBD) of the Spike (S) protein. OBJECTIVE To describe the first detection of variant N.9 in Rio de Janeiro State. METHODS SARS-CoV-2 N.9 was confirmed by quantitative reverse transcription polymerase chain reaction (qRT-PCR), whole-genome sequencing and phylogenetic analysis. FINDINGS Here, we report two SARS-CoV-2 N.9 lineage strains in Rio de Janeiro. One of them had only the E484K substitution of the six N.9 lineage-defining mutations. Other three strains pre-defined as N.9 have the same genomic profile. These four strains are grouped within the B.1.1.33 lineage and basal to the N.9 lineage in our phylogenetic analysis, and we call them “N.9-like/B.1.1.33 + E484K”. MAIN CONCLUSIONS The phylogenetic analysis shows four independent introductions of N.9 in the state of Rio de Janeiro in October and December 2020, January and March 2021. SARS-CoV-2 N.9 dissemination in the Rio de Janeiro could have been limited by the emergence and dominance of other variants, mainly by the lineage P.2 VOI Zeta that emerged in the same period and co-circulated with N.9, as observed in the neighboring State of São Paulo.

Abstract: Resinous restorative materials have been used for decades in adhesive dentistry; however, nowadays the options available in the market are increasingly wider in relation to their mechanical, functional and esthetic properties. It is important to consider that conventional composites do not allow the use of excessive increments in a cavity preparation. In view of this limitation, Bulk Fill resins have emerged, which can be placed in single blocks with larger increments and excellent clinical characteristics and properties. As demonstrated by the documentary analysis carried out in this work, which shows the efficacy in the use of Bulk Fill resins, applied in relation to the cavity characteristics and needs of the patient.

Resumen: Los materiales restauradores resinosos han sido utilizados por décadas en odontología adhesiva; sin embargo, en la actualidad, las opciones disponibles en el mercado son cada vez más amplias en relación a sus propiedades mecánicas, funcionales y estéticas. Es importante considerar que los composites convencionales no permiten la utilización de incrementos excesivos en una preparación cavitaria. Frente a esta limitante surgen las resinas Bulk Fill que pueden colocarse en bloques únicos con incrementos mayores y excelentes características y propiedades clínicas. Como lo demuestra el análisis documental realizado en el presente trabajo en donde se evidencia la eficacia en la utilización de resinas Bulk, aplicada en relación a las características cavitarias y necesidades del paciente.

Abstract The researchers carried out a study with a mixed approach, of a descriptive non-experimental type. The population was made up of all the medical records of patients who were attended at the Dental Care Clinic of the Autonomous Regional University of the Andes, during the free care campaign carried out in the period April-August 2019. 30 medical records were selected through non-probability sampling based on criteria. The objective of this study was to characterize the anesthetic use of vestibular and intraligamentary infiltrations using 4% articaine with epinephrine 1: 100,000, in lower molars and premolars diagnosed with IP after a failed block of inferior alveolar nerve in the investigated context. There was no a statistically insignificant margin, in the case of women, the intraligamentary injection showed better results by (p = 0.109). The intraligamentary injection was more effective in the premolars (p = 0.847). Intra-league injection obtained 86.7% anesthetic success, while vestibular infiltration was 80% with respect to the entire sample where they were applied (p = 0.624).

Resumen Los investigadores realizaron un estudio con enfoque mixto, de tipo no experimental descriptivo; cuya población estuvo constituida por la totalidad de historias clínicas de pacientes que asistieron a la Clínica de Atención Odontológica de la Universidad Regional Autónoma de los Andes, durante la campaña de atención gratuita ejecutada en el periodo abril-agosto 2019, de los que se seleccionaron 30 historias clínicas mediante un muestreo no probabilístico en base a criterios. La misma tuvo el objetivo de caracterizar el uso anestésico de las infiltraciones vestibulares e intraligamentarias utilizando articaína al 4% con epinefrina 1: 100 000, en molares y premolares inferiores diagnosticados con PI, después de un bloqueo fallido del nervio alveolar inferior en el contexto investigado. Sin un margen estadísticamente no significativo, en el caso de las mujeres, la inyección intraligamentaria mostró mejores resultados por (p= 0,109). La inyección intraligamentaria resultó más efectiva en los premolares (p=0,847). La inyección intraligamentaria obtuvo un 86,7% de éxito anestésico, mientras la infiltración vestibular lo fue en un 80% con respecto a la totalidad de la muestra donde se aplicaron (p=0,624).

Abstract An in vitro analytical research was carried out in the general laboratory of the "Carlos Andrade Marín" Hospital. The population consisted of 20 bars of Meta®Biomed brand gutta-percha (Korea) distributed in four groups made up of 5 bars according to the pre-established characteristics in terms of thermoplasticization and handling. Only 15% of the selected samples showed signs of bacterial growth, of which 66.67% belonged to the group of solid gutta-percha bars that were manipulated, establishing specific differences with respect to the rest of the groups (p≤0.01), according to the T-students test. Most of the samples have no evidence of bacterial growth. However, two of the three samples that showed this microbiological activity belonged to the group of solid gutta-percha bars that were manipulated.

Resumen Se realizó una investigación analítica realizada in vitro en el laboratorio general del Hospital “Carlos Andrade Marín”. La población estuvo compuesta por 20 barras de gutapercha marca Meta®Biomed (Korea), distribuidas en cuatro grupos compuestos por 5 barras atendiendo a características preestablecidas en cuanto a realización de termoplastificación y manipulación. Solo el 15% de las muestras se registró indicios de crecimiento bacteriano, de las que el 66,67% pertenecieron al grupo de barras sólidas de gutapercha que fueron manipuladas, estableciéndose diferencias significativas con respecto al resto de los grupos (p≤0.01), según la prueba de T-students. La mayoría de las muestras no mostró indicios de crecimiento bacteriano. Sin embargo, dos de las tres muestras que manifestaron esa actividad microbiológica pertenecieron al grupo de las barras sólidas de gutapercha que fueron manipuladas.

Resumen Objetivo: Comparar in vitro la microfiltración apical en premolares unirradiculares obturados con cemento a base de resina epóxica y cemento biocerámico. Método: 40 piezas dentales unirradiculares fueron seleccionadas y divididas en dos grupos para ser obturadas esperando el tiempo de fraguado de acuerdo con las instrucciones del fabricante. El grupo A se obturó con cemento biocerámico Endosequence y, el grupo B, con cemento a base de resina epóxica AH-Plus: posteriormente los dos grupos fueron sellados con barniz de uñas hasta 3mm de la parte apical, luego se colocaron las muestras en la incubadora a 37ºC. Ambos fueron sometidos a 750 ciclos de termociclado, para reproducir el ambiente parecido a la cavidad oral. Para análisis de microfiltración se utilizó el método de difusión del colorante, se sumergieron en azul de metileno al 2 % por 6 días, posteriormente los especímenes fueron sometidos en una bomba de vacío. Los dientes fueron cortados longitudinalmente para ser evaluadas mediante el estereomicroscopio. El análisis estadístico fue hecho mediante T-Student y Chi-Cuadrado. Resultados: El grupo A corresponde a Endosequence obtuvo una medida de 0,55mm y el grupo B corresponde a AH-Plus 1,20mm con un estimado de significancia de p=0,013. Conclusión: El análisis de ambos cementos de obturación demostró que Endosequence posee menor microfiltración apical que AH-Plus.

Abstract Aim: To compare in vitro by the stereomiscroscope the lesser apical microfiltration in uniradicular premolars, between the cement based on Epoxy Resin and Bioceramic cement. Method: The study was performed on 40 uniradicular dental pieces divided into two groups, the samples were prepared using the protaper system and the obturation was performed using the lateral condensation technique, the first group was sealed withEndosequence bioceramic cement and the second group with Cement based on AH-Plus epoxy resin, then sealed with nail varnish up to 3mm from the apical part, then the samples were placed in the incubator at 37ºC, waiting for the set time corresponding to each group according to the manufacturer’s instructions . The two groups of the present study were submitted to 750 cycles of thermocycling, to provide an environment similar to the oral cavity, then longitudinal cuts were made to the samples. The microfiltration was evaluated using the dye diffusion method, immersed in 2% methylene blue for 6 days, then the specimens were subjected to a vacuum pump. The teeth were cut longitudinally to be evaluated by the stereomicroscope. The statistical analysis was through T-Student and Chi-Square. Results: Group A corresponds to Endosequence obtained a mean of 0,55mm and Group B corresponds to AH-Plus 1,20mm with an estimated significance of p = 0,013. Conclusion: Both obturation cements have significant differences, therefore Endosequence has less apical microfiltration than AHPlus.

resumo Historicamente, a expansão das cidades resultou na substituição da paisagem natural pela urbana, tendo como consequência a degradação ambiental por meio das mudanças na cobertura do solo, nos sistemas hidrológicos, nos ciclos biogeoquímicos, no clima e na biodiversidade, tornando as cidades especialmente vulneráveis às mudanças climáticas. A reversão desses processos é uma medida que visa a promoção da qualidade de vida nas cidades, na qual a arborização possui um papel fundamental por fornecer uma série de serviços ecossistêmicos valiosos para a promoção da biodiversidade, saúde e bem-estar social. Sendo direito de todos um meio ambiente equilibrado, saudável, de uso comum e essencial à qualidade de vida, o verde urbano é assunto interdisciplinar e de responsabilidade comum e generalizada. Cabe ao poder público a regularização, criação e manutenção dos plantios, promovendo o plantio de árvores a distâncias predeterminadas de acordo com o porte de cada espécie. Porém, os movimentos ativistas se desenvolveram no vácuo da morosidade do poder público seguindo, em geral, o método de adensamento de árvores pautado pelo conceito de sucessão ecológica. Ao promover a restauração dos serviços ecossistêmicos, as duas iniciativas de plantio arbóreo tendem a trazer grandes benefícios às grandes cidades, como São Paulo. Porém, a complexidade da paisagem urbana exige uma avaliação sistêmica dos plantios para definir a sua adequação espacial e otimizar os seus benefícios. O plantio das florestas urbanas não deve ter como objetivo recriar as condições naturais pré-urbanização, mas sim, desenvolver áreas verdes integradas à malha urbana que garantam um ambiente saudável e equilibrado, preservando as interações sociais. Ao visualizar o meio urbano como um ecossistema completo, é possível estabelecer critérios que otimizem os benefícios da arborização urbana. Estes critérios devem ser baseados em conhecimento técnico e científico, levando em conta necessidades sociais, para que o melhor método seja escolhido, caso a caso.

abstract Historically, the expansion of cities resulted in the replacement of natural landscape by urban environments, resulting in environmental degradation through changes in soil cover, hydrological systems, biogeochemical cycles, biodiversity, making cities particularly vulnerable to climate changes. Environmental restoration in cities is a measure to promote life quality, and urban forests play a key role in restoring the quality of the urban environment. They provide valuable ecosystem services for maintaining biodiversity, ensuring human health, and social well-being. As everyone has the right to live in a balanced, healthy and common use environment essential to suppor quality of life, urban green areas are an interdisciplinary issue of collective concern. It is the responsibility of the government to regulate, plant and manage urban trees in order to standardize urban afforestation by planting trees at predetermined distances according to the size of each species. However, the vacuum in the greening process left by the State is being filled by activists who, in general, use a different protocol that aims at higher tree density based on the notion of ecological succession. By promoting the restoration of ecosystem services, both initiatives tend to bring significant benefits to large cities such as São Paulo. However, the complexity of the urban landscape requires a systemic evaluation of tree planting to define spatial adequacy and optimize benefits. The planting of urban forests should not aim to recreate pre-urban natural conditions, but rather to develop green areas integrated to the urban network that guarantee a healthy and balanced environment while preserving social interactions. By perceiving the urban environment as a complete ecosystem, it is possible to establish criteria that optimize the benefits of urban afforestation. These criteria should be based on technical and scientific knowledge, and take into account social needs, so that the best method is chosen on a case-by-case basis.

Objective: To compare social skills and related executive functions among bipolar disorder (BD) patients with a family history of mood disorders (FHMD), BD patients with no FHMD and healthy control (HCs). Methods: We evaluated 20 euthymic patients with FHMD, 17 euthymic patients without FHMD, and 31 HCs using the Social Skills Inventory (SSI) and a neuropsychological battery evaluating executive function, inhibitory control, verbal fluency and estimated intelligence. Results: Both BD groups had lower SSI scores than controls. Scores for one subfactor of the social skills questionnaire, conversational skills and social performance, were significantly lower among patients with FHMD than among patients without FHMD (p = 0.019). Both groups of BD patients exhibited significant deficits in initiation/inhibition, but only BD patients with FHMD had deficits in verbal fluency, both compared to HC. There were no associations between social skills questionnaire scores and measures of cognitive function. Conclusion: Euthymic BD patients have lower social skills and executive function performance than HC. The presence of FHMD among BD patients is specifically associated with deficits in conversational and social performance skills, in addition to deficits in verbal fluency. Both characteristics might be associated with a common genetically determined pathophysiological substrate.

A veinte años de la universalización de la Educación Inicial (EI) se reportan elevados niveles de ausentismo y asistencia intermitente en niños y niñas que asisten a los niveles de 4 y 5 en escuelas públicas. Montevideo, Canelones y Tacuarembó cuentan con escuelas de Contexto Sociocultural Crítico. Nos propusimos comprender qué factores inciden en la asistencia intermitente y la deserción en EI, desde el discurso de cinco madres de familia. Producto de las entrevistas a profundidad emergieron diversas categorías que dan cuenta de la multicausalidad del fenómeno, así como estrategias que contribuyen a revertirlo con la participación de todos actores y actrices involucrados e involucradas. Consideramos que el afianzamiento del vínculo familiaescuela- comunidad (Educación Inicial de Base Segura) y el fortalecimiento de las redes sociales potencian la permanencia del niño y la niña en el sistema educativo.

Even 20 years from the anchoring of an Early Childhood program into our educational system, absenteeism and erratic assistance are still a challenge public schools face. Given that schools in Montevideo, Canelones and Tacuarembó encounter an awry sociocultural background, we were determined to find the reasons behind such high levels of absences and desertions. Five interviews were done thoroughly to different mothers; which helped us pinpoint specific causes to understand the multi-causality of the problem, as well as some integrated strategies that respond to the interests and motivations of the actors involved. We are confident that having a functional network of attachment bonds (Secure Base Childcare) can assure stability for the development of children at young ages.

Vinte anos depois da universalização da Educação Infantil (EI) reportam-se problemas na assistência e abandono escolar em crianças dos níveis 4 e 5 das escolas públicas. Montevideo, Canelones e Tacuarembó contam com escolas pertencentes aos Contextos Socioculturais Críticos. Propusemo-nos a compreender os fatores que incidem na frequência e o abandono em EI, a partir das experiências de cinco mães de família. As principais informaçãµes obtidas através das entrevistas em profundidade geraram categorias que evidenciam a multicausalidade do fenômeno em questão e algumas estratégias possíveis mediante a participação dos atores educativos. Consideramos que a estabilização do vínculo família-escola e o fortalecimento das redes sociais potenciam a permanência das crianças no sistema educativo.

Actualmente los fitoesteroles son adicionados a los alimentos industrializados, lo que aumenta su costo y por lo tanto limita su consumo. Este manuscrito tiene como objetivo identificar alimentos que son una fuente natural de fitoesteroles, así como también analizar cómo el ambiente y el manejo productivo modifican su contenido, relacionando estos aspectos con la salud. Los fitoesteroles son compuestos presentes en las plantas con propiedades hipocolesterolémicas, que pueden contribuir a prevenir las enfermedades cardiovasculares. La ingesta diaria estimada de fitoesteroles varía entre 160 y 500 mg/día, sin embargo su acción beneficiosa se logra con consumos de 1500 mg a 2400 mg diarios. Las semillas de oleaginosas y de cereales son las mayores fuentes naturales de fitoesteroles. El amaranto es considerado un pseudocereal y entre los cereales tiene la mayor concentración de fitoesteroles con 178 mg/100 g, valor 5 veces superior al de la harina de trigo. El ambiente modifica el contenido de fitoesteroles de los alimentos, la sequía y temperaturas altas duplican su contenido en las semillas; la fertilización nitrogenada y la fecha de siembra pueden provocar cambios, pero se requieren más estudios al respecto. La selección de genotipos con mayor contenido de fitoesteroles y el estudio de la interacción genotipo ambiente, permitirá la identificación de aquellos genotipos con adaptación local para este carácter. El manejo productivo podrá aumentar la oferta de alimentos naturales ricos en fitoesteroles, contribuyendo a una mayor oferta de alimentos protectores de la salud.

Natural sources of phytosterols and production factors that modify them. Currently phytosterols are added to processed foods, which increase their cost and therefore limits its use. This manuscript aims to identify foods that are a natural source of phytosterols, as well as analyze how the environment and production management modify its content, linking these aspects with health. Phytosterols are compounds found in plants with hypocholesterolemic properties, which may help prevent cardiovascular diseases. The estimated daily intake of phytosterols varies between 160 and 500 mg/day, but its beneficial effect is achieved with 1,500 to 2,400 mg daily consumption. Oil and cereal seeds are the largest natural sources of phytosterols. Amaranth is considered a pseudocereal and among the cereals has the highest concentration of phytosterols with 178 mg/100 g, value 5 times higher than wheat flour. Environment modifies phytosterol content in food, drought and high temperatures can double their content in seeds; nitrogen fertilization and planting date can cause changes, but more studies are needed. The selection of genotypes with higher phytosterol content and studying the genotype x environment interaction, allow the identification of those genotypes with local adaptation for this character. The production management will increase the supply of natural foods rich in phytosterols, contributing to a greater supply of health protective foods.

Racional: A obesidade é doença crônica considerada atualmente um dos maiores problemas de saúde pública. Mostrando-se eficaz em curto e longo prazo a cirurgia bariátrica surgiu como opção de tratamento para a obesidade grau III. Objetivo: Identificar o perfil dos pacientes que procuram a cirurgia bariátrica. Métodos: Foram entrevistados 100 pacientes em acompanhamento nutricional pré-operatório de cirurgia bariátrica. O estudo foi realizado através da aplicação de um questionário elaborado de acordo com os objetivos da pesquisa. Resultados: Dos indivíduos que buscaram a cirurgia bariátrica, 78% eram do sexo feminino, 62% casados e 69% dos entrevistados afirmaram praticar atividade física. A média de idade dos indivíduos pesquisados foi de 37±10,83 anos e a média de IMC foi de 43,51±6,25 kg/m². A comorbidade que mais prevaleceu no grupo pesquisado foi a hipertensão arterial (51%). Dos tratamentos prévios para redução de peso, 92% já realizou dieta hipocalórica seguido de medicamento anorexígeno (83%). O sucesso destes tratamentos foi relatado por 92% dos pacientes; porém, o peso perdido foi recuperado em menos de um ano por 75%. Ao associarem-se as comorbidades com o IMC, encontrou-se diferença significativa entre os pacientes com e sem diabete melito, assim como os com e sem dislipidemia. Os pacientes que apresentavam comorbidades mostraram menores níveis de IMC. Conclusão: O perfil dos pacientes que buscaram correção cirúrgica para sua obesidade eram predominantemente mulheres, com histórico familiar de obesidade, com média de idade de 37 anos e com comorbidades relacionadas à obesidade, com destaque para hipertensão arterial e diabete melito.

Background: Nowadays obesity is a chronic disease considered one of the greatest problems in public healthy. Showing to be effective in a short and long term, the bariatric surgery has emerged as an optional treatment for morbid obesity. Aim: Identify the profile of patients seeking bariatric surgery. Methods: Were interviewed 100 patients in preoperative nutritional monitoring of bariatric surgery. The study was conducted by applying a questionnaire prepared according to the research objectives. Results: From the individuals that were seeking bariatric surgery, 78% were female, 62% were married and 69% reported physical activity. The average age of those surveyed was 37±10.83 years and mean body mass index (BMI) was 43.51± 6.25 kg/m². The comorbidity more prevalent in this group was high blood pressure (51%). In previous treatments for weight reduction, 92% have already done hypocaloric diet followed by anorectic drug (83%). The success of these treatments was reported by 92% of patients; however, the weight lost was recovered in less than one year of 75%. Patients with diabetes mellitus and dyslipidemia had higher BMI values. The patients with comorbidities showed lower levels of BMI. Conclusion: The profile of patients who sought surgical treatment for their obesity were predominantly women with a family background of obesity and obesity-related comorbidities, especially hypertension and diabetes mellitus.

Neste trabalho se propôs analisar a influência que a variação do comprimento da fibra de coco exerce na resistência à compressão da argamassa, em busca de se determinar, experimentalmente, o comprimento mais próximo ao tamanho crítico. Foram confeccionadas argamassas com adição (0,3% em relação ao volume total da mistura) de 6 comprimentos diferentes de fibras de coco: 12,5; 25,0; 37,5; 50,0; 62,5 e 75,0 mm, além de uma argamassa de referência sem adição de fibra de coco. Para a avaliação do comportamento de cada um deles na argamassa foram efetuados ensaios de consistência no estado fresco e resistência à compressão axial no estado endurecido, realizado nas idades 7, 28 e 56 dias, ao longo do primeiro semestre de 2013. Foi observado que todos os comprimentos de fibra testados diminuem a resistência à compressão em relação à argamassa de referência, nas três idades. No entanto, dentre esses comprimentos testados, pode-se afirmar que a argamassa com adição de fibras de comprimento 25,0 mm obteve melhor desempenho nas três idades testadas.

This paper aims to analyse the influence that the length of coconut fiber exerts on compressive strength of mortar seeking to determine their critical length. Mortars were prepared with addition (0.3% volume of the mixture) of 6 different lengths of coconut fibers: 12.5, 25.0, 37.5, 50.0, 62.5 and 75.0 mm, and a reference mortar. To study the behavior of each one in mortar, consistency tests were performed on fresh and hard state in axial compression strength test at three ages (7, 28 and 56 days) during the first half of 2013. It was observed that all lengths tested decrease resistance compared to the reference mortar in three ages, however, the mortar with addition of 25.0 mm length fibers had a better performance in the study.

Broad bean (Vicia faba L. [unranked] major (Harz) Beck) is usually consumed dry. In Chile, however, broad bean is grown as a vegetable crop with indeterminate genotypes. The new ’Alarga’, ’Retaca’ and ’Verde Bonita’ broad bean genotypes, which have a determinate growth habit, were evaluated in six irrigated environments in central Chile at three locations (Rancagua, Talca, and Talagante) and on two planting dates (F1 and F2; 1-mo apart). The aim was to characterize their yield and select the best-yielding genotypes in terms of pod yield (PY) and fresh grain yield (GY). The best location(s) to produce fresh pods and fresh grain were also identified and described. Fresh grain yield and components were measured and the genotype x environment interaction (GxE) was analyzed. Pod yield differed among genotypes; ’Verde Bonita’ and ’Retaca’ had the highest PY (15 500 kg ha-1, 8% higher than ’Alarga’). There was a GxE interaction for GY and ’Retaca’ had its highest yield in Talca on the two planting dates and in Rancagua when planted late (F2). Mean GY of ’Retaca’ was 3900 kg ha-1 with the highest number of grains per 1 m² (NG). The best GY was related to a higher seasonal photothermal quotient (ranging from 1.15 to 1.82 MJ m-2 d-1 °C-1, r = 0.90, P ≤ 0.001). The lowest GY was in Talagante on F1. Genotypes differed in yield composition; ’Retaca’ had many small pods giving many seeds per unit area and ’Verde Bonita’ had large pods yielding fewer grains per unit area. The ’Retaca’ genotype is preferred by the frozen broad bean industry, whereas ’Verde Bonita’ is preferred by the fresh broad bean market.

Providing information to patients and relatives (IPAR) is a clinical, ethical and legal need. IPAR is inherent to the medical team work as diagnostic and therapeutic procedures are. In some cases, it is a key step for patient's recovery. From an ethical point of view, the patient is not only the subject of the medical work but also its main owner and who must, previously informed, decide about options which would directly affect him. After the promulgation of a special law in Chile, this prerogative became a legal right. This paper proposes an empirically developed model or protocol that should be used to inform hospitalized patients and their relatives about their disease, in a pertinent way. Considering that IPAR is a skill that should be learned and practiced, the written protocol is provided to neurology residents as supporting material. Although IPAR protocols are completely justified, they have not been evaluated in terms of efficiency of communication, user satisfaction, patient and relatives reassurance and clinical impact. Therefore, they require a prospective validation.

The genetic coefficients, representative of a crop, are necessary to use growth models; in many cases the range of the species is known, but there are no specific values for varieties. Durum wheat (Triticum turgidumL. ssp. durum) ’Llareta-INIA’ and ’Corcolén-INIA’ were sown under irrigation in the experiment station Antumapu of the Universidad de Chile on 29 June 2007, 19 May 2009, and 15 June 2010 in order to determinate four genetic coefficients: developmental thermal time, phyllochron (PHLN), extinction coefficient (k), and radiation use efficiency (RUE), and to evaluate the performance of these coefficients. Thermal times to anthesis and from anthesis to physiological maturity were 652 and 541 °C d, respectively. Two PHLN values were found, 46.6 °C d leaf-1 from emergence to fifth leaf and 102.9 °C d leaf-1 from fifth to eighth leaf. In both cases neither variety nor sowing date was significant. The value of kdid not vary among sowing dates for ’Llareta-INIA’ and was not significantly different from that of ’Corcolén-INIA’ for normal planting date, due to which a single fit for the two varieties was adjusted, obtaining a value of 0.46. However, ’Corcolén-INIA’ had a lower value of kfor later sowing dates. RUE did not vary between varieties or sowing dates; its estimated value was 2.83 g MJ-1. The evaluation of the coefficients obtained showed coherent results, thus they can be used in model simulations.