Floración y fructificación del Ananas comosus L. Merr. bajo dos sistemas de cultivo en condiciones subtropicales

Pineapple production in the subtropics is limited by low temperatures. Frost affects the growth and development of the plants, being the main factor that compromises production. One way to mitigate this problem is the use of plastic covers (greenhouses), which could, however, negatively affect the productivity. We studied the flowering and fruiting of pineapple (Ananas comosus L. Merr.) in two cropping systems (greenhouse and field) in a subtropical region in the northeast of Argentina. Two experimental batches, with plastic covers and uncovered, divided into eight plots, were set up and phenological crop monitoring was performed. The experimental design was completely random. At the time of harvest, physical and chemical variables, such as length of fruit length with crown, fruit length without crown, equatorial diameter, density, firmness, °Brix and acidity values, were analysed to represent fruit quality. The results showed significant differences between the cultivation systems studied. Cultivation type had a marked effect on fruit quality; fruits produced in the greenhouse had a higher weight and size than those produced in the field; however, the chemical variables related to flavour did not differ significantly between the two cultivation types.La producción de piña (Ananas comosus L. Merr) en el subtrópico encuentra como principal factor limitante a las bajas temperaturas, ya que afectan el crecimiento y desarrollo de la planta. Una posibilidad concreta para controlar esta dificultad es el uso de coberturas plásticas o invernáculos, el cual podrían incidir en el cultivo y su productividad. El objetivo de este trabajo fue evaluar el comportamiento de la floración y fructificación de la piña en dos sistemas de cultivo en regiones subtropicales del nordeste argentino. Se establecieron dos lotes experimentales, con cobertura plástica y sin cobertura, divididos cada uno en ocho parcelas. El diseño experimental fue completamente al azar. Se realizó el seguimiento fenológico del cultivo y para determinar la calidad del fruto se analizaron variables físicas y químicas: longitud del fruto con y sin corona, diámetro ecuatorial, densidad, firmeza, °Brix y acidez. Los resultados mostraron diferencias significativas entre los sistemas de cultivo estudiados, en donde el sistema de cultivo tuvo un marcado efecto a favor de las frutas producidas por plantas bajo cobertura plástica presentaron un peso y tamaño superior a las producidas sin cobertura; sin embargo las variables químicas relacionadas con el sabor en ambos sistemas no fueron afectadas significativamente.Facultad de Ciencias Agrarias y Forestale

Floración y fructificación del Ananas comosus L. Merr. bajo dos sistemas de cultivo en condiciones subtropicales

Pineapple production in the subtropics is limited by low temperatures. Frost affects the growth and development of the plants, being the main factor that compromises production. One way to mitigate this problem is the use of plastic covers (greenhouses), which could, however, negatively affect the productivity. We studied the flowering and fruiting of pineapple (Ananas comosus L. Merr.) in two cropping systems (greenhouse and field) in a subtropical region in the northeast of Argentina. Two experimental batches, with plastic covers and uncovered, divided into eight plots, were set up and phenological crop monitoring was performed. The experimental design was completely random. At the time of harvest, physical and chemical variables, such as length of fruit length with crown, fruit length without crown, equatorial diameter, density, firmness, °Brix and acidity values, were analysed to represent fruit quality. The results showed significant differences between the cultivation systems studied. Cultivation type had a marked effect on fruit quality; fruits produced in the greenhouse had a higher weight and size than those produced in the field; however, the chemical variables related to flavour did not differ significantly between the two cultivation types.La producción de piña (Ananas comosus L. Merr) en el subtrópico encuentra como principal factor limitante a las bajas temperaturas, ya que afectan el crecimiento y desarrollo de la planta. Una posibilidad concreta para controlar esta dificultad es el uso de coberturas plásticas o invernáculos, el cual podrían incidir en el cultivo y su productividad. El objetivo de este trabajo fue evaluar el comportamiento de la floración y fructificación de la piña en dos sistemas de cultivo en regiones subtropicales del nordeste argentino. Se establecieron dos lotes experimentales, con cobertura plástica y sin cobertura, divididos cada uno en ocho parcelas. El diseño experimental fue completamente al azar. Se realizó el seguimiento fenológico del cultivo y para determinar la calidad del fruto se analizaron variables físicas y químicas: longitud del fruto con y sin corona, diámetro ecuatorial, densidad, firmeza, °Brix y acidez. Los resultados mostraron diferencias significativas entre los sistemas de cultivo estudiados, en donde el sistema de cultivo tuvo un marcado efecto a favor de las frutas producidas por plantas bajo cobertura plástica presentaron un peso y tamaño superior a las producidas sin cobertura; sin embargo las variables químicas relacionadas con el sabor en ambos sistemas no fueron afectadas significativamente.Facultad de Ciencias Agrarias y Forestale

Floración y fructificación del Ananas comosus L. Merr. bajo dos sistemas de cultivo en condiciones subtropicales

Pineapple production in the subtropics is limited by low temperatures. Frost affects the growth and development of the plants, being the main factor that compromises production. One way to mitigate this problem is the use of plastic covers (greenhouses), which could, however, negatively affect the productivity. We studied the flowering and fruiting of pineapple (Ananas comosus L. Merr.) in two cropping systems (greenhouse and field) in a subtropical region in the northeast of Argentina. Two experimental batches, with plastic covers and uncovered, divided into eight plots, were set up and phenological crop monitoring was performed. The experimental design was completely random. At the time of harvest, physical and chemical variables, such as length of fruit length with crown, fruit length without crown, equatorial diameter, density, firmness, °Brix and acidity values, were analysed to represent fruit quality. The results showed significant differences between the cultivation systems studied. Cultivation type had a marked effect on fruit quality; fruits produced in the greenhouse had a higher weight and size than those produced in the field; however, the chemical variables related to flavour did not differ significantly between the two cultivation types.La producción de piña (Ananas comosus L. Merr) en el subtrópico encuentra como principal factor limitante a las bajas temperaturas, ya que afectan el crecimiento y desarrollo de la planta. Una posibilidad concreta para controlar esta dificultad es el uso de coberturas plásticas o invernáculos, el cual podrían incidir en el cultivo y su productividad. El objetivo de este trabajo fue evaluar el comportamiento de la floración y fructificación de la piña en dos sistemas de cultivo en regiones subtropicales del nordeste argentino. Se establecieron dos lotes experimentales, con cobertura plástica y sin cobertura, divididos cada uno en ocho parcelas. El diseño experimental fue completamente al azar. Se realizó el seguimiento fenológico del cultivo y para determinar la calidad del fruto se analizaron variables físicas y químicas: longitud del fruto con y sin corona, diámetro ecuatorial, densidad, firmeza, °Brix y acidez. Los resultados mostraron diferencias significativas entre los sistemas de cultivo estudiados, en donde el sistema de cultivo tuvo un marcado efecto a favor de las frutas producidas por plantas bajo cobertura plástica presentaron un peso y tamaño superior a las producidas sin cobertura; sin embargo las variables químicas relacionadas con el sabor en ambos sistemas no fueron afectadas significativamente.Facultad de Ciencias Agrarias y Forestale

Huertos frutales agroecológicos y prevención de zoonosis como alternativa para la seguridad alimentaria

The project was carried out in San Martin, Chaco, along with families associated with secondary and tertiary levels from EFA (Family Agricultural School) 141 Fortaleza Campesina and the whole community. Teachers and students from three academic units (FCA and FCV UNNE and EFA 141 Fortaleza Campesina) participated and representatives from INCUPO and General San Martin Town Hall cooperated with them. The project sought food safety for the community and cost-effective use of production. Profitable programming was carried out integrating expertise as regards: fruit varieties management, pets and domestic animals sanitation able to reach the productive system and awareness of local fruit nutritional benefits. Fruit plant nurseries were installed, not only for direct use but also for strengthening ties between families through the exchange of propagation material and seeds. Several events were held such as: theory and practice training sessions, cooperative installation of orchards and nurseries, participation at fairs, prevention and awareness of zoonoses and nutritional understanding. The development of this project offered families, small producers and San Martin Chaco community practical and valuable aspects of fruit orchards to strengthen their food security. Furthermore, to our University community, it was a contribution of experiences in interdisciplinary groups that enhances the extensionist professional work with social sensitivity among students.El proyecto se llevó adelante en la zona de San Martin Chaco, con familias relacionadas a la EFA 141 Fortaleza Campesina, de los niveles secundario y terciario y con propuestas extensivas a la comunidad en general. Participaron docentes y alumnos de tres unidades académicas (FCA y FCV UNNE y EFA Fortaleza Campesina) y colaboraron activamente representantes de la sociedad como el INCUPO y la Municipalidad de General San Martin. El proyecto buscó promover la seguridad alimentaria de la comunidad y el aprovechamiento económico de la producción.  Se realizó una programación productiva, integrando el conocimiento por medio del manejo de las especies frutales, del saneamiento de mascotas y animales domésticos, que pudieran alcanzar al sistema productivo y de la concientización de los beneficios nutricionales que estos frutales les ofrece. Se instalaron viveros de frutales no solo para el aprovechamiento directo sino también para el fortalecimiento de lazos entre familias para el intercambio de material de propagación y semillas. Se realizaron encuentros teórico-prácticos formativos, instalación participativa de los huertos y viveros, participación en ferias, prevención y sensibilización de zoonosis y concientización nutricional. El desarrollo de este proyecto ofreció a las familias, pequeños productores y comunidad de San Martin Chaco aspectos prácticos y valiosos de los huertos frutales para fortalecer su seguridad alimentaria. Sumado a ello, en nuestra comunidad Universitaria fue un aporte de experiencias de trabajo en grupos interdisciplinarios que potencia en los alumnos el profesional extensionista con sensibilidad social.

New genetic loci link adipose and insulin biology to body fat distribution.

Body fat distribution is a heritable trait and a well-established predictor of adverse metabolic outcomes, independent of overall adiposity. To increase our understanding of the genetic basis of body fat distribution and its molecular links to cardiometabolic traits, here we conduct genome-wide association meta-analyses of traits related to waist and hip circumferences in up to 224,459 individuals. We identify 49 loci (33 new) associated with waist-to-hip ratio adjusted for body mass index (BMI), and an additional 19 loci newly associated with related waist and hip circumference measures (P < 5 × 10(-8)). In total, 20 of the 49 waist-to-hip ratio adjusted for BMI loci show significant sexual dimorphism, 19 of which display a stronger effect in women. The identified loci were enriched for genes expressed in adipose tissue and for putative regulatory elements in adipocytes. Pathway analyses implicated adipogenesis, angiogenesis, transcriptional regulation and insulin resistance as processes affecting fat distribution, providing insight into potential pathophysiological mechanisms

Combined searches for the production of supersymmetric top quark partners in proton-proton collisions at root s=13 TeV

A combination of searches for top squark pair production using proton-proton collision data at a center-of-mass energy of 13 TeV at the CERN LHC, corresponding to an integrated luminosity of 137 fb(-1) collected by the CMS experiment, is presented. Signatures with at least 2 jets and large missing transverse momentum are categorized into events with 0, 1, or 2 leptons. New results for regions of parameter space where the kinematical properties of top squark pair production and top quark pair production are very similar are presented. Depending on themodel, the combined result excludes a top squarkmass up to 1325 GeV for amassless neutralino, and a neutralinomass up to 700 GeV for a top squarkmass of 1150 GeV. Top squarks with masses from 145 to 295 GeV, for neutralino masses from 0 to 100 GeV, with a mass difference between the top squark and the neutralino in a window of 30 GeV around the mass of the top quark, are excluded for the first time with CMS data. The results of theses searches are also interpreted in an alternative signal model of dark matter production via a spin-0 mediator in association with a top quark pair. Upper limits are set on the cross section for mediator particle masses of up to 420 GeV

Search for new particles in events with energetic jets and large missing transverse momentum in proton-proton collisions at root s=13 TeV

A search is presented for new particles produced at the LHC in proton-proton collisions at root s = 13 TeV, using events with energetic jets and large missing transverse momentum. The analysis is based on a data sample corresponding to an integrated luminosity of 101 fb(-1), collected in 2017-2018 with the CMS detector. Machine learning techniques are used to define separate categories for events with narrow jets from initial-state radiation and events with large-radius jets consistent with a hadronic decay of a W or Z boson. A statistical combination is made with an earlier search based on a data sample of 36 fb(-1), collected in 2016. No significant excess of events is observed with respect to the standard model background expectation determined from control samples in data. The results are interpreted in terms of limits on the branching fraction of an invisible decay of the Higgs boson, as well as constraints on simplified models of dark matter, on first-generation scalar leptoquarks decaying to quarks and neutrinos, and on models with large extra dimensions. Several of the new limits, specifically for spin-1 dark matter mediators, pseudoscalar mediators, colored mediators, and leptoquarks, are the most restrictive to date.Peer reviewe

Search for lepton-flavor violating decays of the Higgs boson in the mu tau and e tau final states in proton-proton collisions at root s=13 TeV

A search is presented for lepton-flavor violating decays of the Higgs boson to mu t and et. The dataset corresponds to an integrated luminosity of 137 fb(-1) collected at the LHC in proton-proton collisions at a center-of-mass energy of 13 TeV. No significant excess has been found, and the results are interpreted in terms of upper limits on lepton-flavor violating branching fractions of the Higgs boson. The observed (expected) upper limits on the branching fractions are, respectively, B(H -> mu t) e tau) < 0.22(0.16)% at 95% confidence level.Peer reviewe

Search for top squark production in fully hadronic final states in proton-proton collisions at root s=13 TeV

A search for production of the supersymmetric partners of the top quark, top squarks, is presented. The search is based on proton-proton collision events containing multiple jets, no leptons, and large transverse momentum imbalance. The data were collected with the CMS detector at the CERN LHC at a center-of-mass energy of 13 TeV, and correspond to an integrated luminosity of 137 fb(-1). The targeted signal production scenarios are direct and gluino-mediated top squark production, including scenarios in which the top squark and neutralino masses are nearly degenerate. The search utilizes novel algorithms based on deep neural networks that identify hadronically decaying top quarks and W bosons, which are expected in many of the targeted signal models. No statistically significant excess of events is observed relative to the expectation from the standard model, and limits on the top squark production cross section are obtained in the context of simplified supersymmetric models for various production and decay modes. Exclusion limits as high as 1310 GeVare established at the 95% confidence level on the mass of the top squark for direct top squark production models, and as high as 2260 GeV on the mass of the gluino for gluino-mediated top squark production models. These results represent a significant improvement over the results of previous searches for supersymmetry by CMS in the same final state.Peer reviewe