Genetic potential of BR 5011-Sertanejo maize cultivar in the coastal plainlands of the northern region of Brazil

Cinco ciclos de seleção entre e dentro de progênies de meios-irmãos foram realizados na cultivar de milho BR 5011-Sertanejo, nos municípios de Neópolis (1991 e 1992), Neópolis e Umbaúba (1993), Lagarto (1994) e Neópolis, Lagarto e Cruz das Almas (1995), localizados nos tabuleiros costeiros do Nordeste brasileiro, visando à obtenção de uma cultivar mais produtiva e mais bem adaptada às condições edafoclimáticas da região. As progênies foram avaliadas em látice 14x14, com duas repetições. As recombinações foram realizadas dentro do mesmo ano agrícola do teste, de modo a se obter um ciclo por ano. A variabilidade genética da cultivar BR 5011-Sertanejo permaneceu praticamente a mesma nos ciclos VI, VII e IX, quando a seleção foi efetuada em um só local. Nos ciclos VIII e X, realizados em mais de um local, detectou-se redução dessa variabilidade pelo fato de as estimativas obtidas estarem menos influenciadas pela interação progênies x locais, o que evidencia a importância de se realizar a seleção em mais de um local, para melhorar a eficiência do processo seletivo e obter estimativas mais consistentes dos componentes da variância genotípica. O ganho médio estimado por ciclo de seleção foi de 12,68%. A possibilidade de ganho com a seleção, a alta variabilidade genética apresentada pela cultivar e as elevadas médias de produtividade das progênies indicam o grande potencial dessa população na continuidade do programa de melhoramento.Five selection cycles were carried among and within half-sib progenies on the cultivar BR 5011-Sertanejo in the Counties of Neópolis (1991 and 1992), Neópolis and Umbaúba (1993), Lagarto (1994) and Neópolis, Lagarto and Cruz das Almas (1995), located in the Coastal Plainlands of the Northern region of Brazil. The study aimed to obtain a more yielding and well adapted cultivar of maize to the soil and climatic conditions of this region. The progenies were evaluated in lattice 14x14 with two replications. Recombinations of the outstanding progenies were processed within the same year in order to get one cycle per year. The magnitude of the genetic variability of the BR5011-Sertanejo cultivar was approximately the same in the cycles VI, VII and IX, conducted in one location. However, a reduction of this variability was observed in the cycles VIII and X, performed in more than one locality, since the estimatives obtained were less influenced by the interaction progeny x local, showing the importance of the selection in more than one environment, to increase the efficiency of the process and to obtain more accurate estimates of the genotypic variances. In relation to year yield the average gain estimated per selection cycle was 12.68% which associated to the high genetic variability presented by the cultivar and to the high average of progenies productivity indicates its potential for the continuation of the breeding program

Desempenho agronômico da tangerineira 'Piemonte' enxertada em diversos porta-enxertos nos Tabuleiros Costeiros

The objective of this work was to evaluate the agronomical performance of 'Piemonte' mandarin grafted on 11 rootstocks grown under the edaphoclimatic conditions of the Coastal Tablelands, in the state of Sergipe, Brazil. The following combined agronomical parameters were evaluated: vegetative growth, abundance of phytophagous mites, plant yield, drought tolerance, and physicochemical quality of fruit. 'Piemonte' mandarin had the best productive performance when grafted on 'Santa Cruz Rangpur' lime, 'Red Rough' lemon, 'Sunki Tropical' mandarin, and 'Riverside' citrandarin, and it was more tolerant to drought when grafted on 'Santa Cruz Rangpur' lime and on the LVK x LCR-010 hybrid. Rootstocks did not affect pest population levels. 'Piemonte'mandarin grafted on 'Santa Cruz Rangpur' lime and 'Red Rough' lemon produced lower-quality fruit. The 'Indio' and 'San Diego' citrandarins, the HTR-051 hybrid, and 'Swingle' citrumelo have potential for high-density plantings. 'Sunki Tropical' mandarin and 'Riverside' citrandarin are a good option for the diversification of rootstocks in orchards in the agroecosystem of the Brazilian Coastal Tablelands.O objetivo deste trabalho foi avaliar o desempenho agronômico da tangerineira 'Piemonte' enxertada em 11 porta-enxertos cultivados nas condições edafoclimáticas dos Tabuleiros Costeiros, no Estado de Sergipe. Os seguintes parâmetros agronômicos combinados foram avaliados: crescimento vegetativo, abundância de ácaros fitófagos, produção, tolerância à seca e qualidade físico-química de frutos. A tangerineira 'Piemonte' apresentou o melhor desempenho produtivo quando enxertada nos limoeiros 'Cravo Santa Cruz' e 'Rugoso Vermelho', na tangerineira 'Sunki Tropical' e no citrandarin 'Riverside', e se tornou mais tolerante ao deficit hídrico quando enxertada no limoeiro 'Cravo Santa Cruz' e no híbrido LVK x LCR-010. Os porta-enxertos não influenciaram o nível populacional de pragas. A tangerineira 'Piemonte' enxertada nos limoeiros 'Cravo Santa Cruz' e 'Rugoso Vermelho' produziu frutos de qualidade inferior. Os citrandarins 'Indio' e 'San Diego', o híbrido HTR-051 e o citrumelo 'Swingle' apresentam potencial para plantios adensados. A tangerineira 'Sunki Tropical' e o citrandarin 'Riverside' são uma boa opção para a diversificação de porta-enxertos em pomares no agroecossistema dos Tabuleiros Costeiros

Measurement of the top quark forward-backward production asymmetry and the anomalous chromoelectric and chromomagnetic moments in pp collisions at √s = 13 TeV

Abstract The parton-level top quark (t) forward-backward asymmetry and the anomalous chromoelectric (d̂ t) and chromomagnetic (μ̂ t) moments have been measured using LHC pp collisions at a center-of-mass energy of 13 TeV, collected in the CMS detector in a data sample corresponding to an integrated luminosity of 35.9 fb−1. The linearized variable AFB(1) is used to approximate the asymmetry. Candidate t t ¯ events decaying to a muon or electron and jets in final states with low and high Lorentz boosts are selected and reconstructed using a fit of the kinematic distributions of the decay products to those expected for t t ¯ final states. The values found for the parameters are AFB(1)=0.048−0.087+0.095(stat)−0.029+0.020(syst),μ̂t=−0.024−0.009+0.013(stat)−0.011+0.016(syst), and a limit is placed on the magnitude of | d̂ t| < 0.03 at 95% confidence level. [Figure not available: see fulltext.

Measurement of the azimuthal anisotropy of Y(1S) and Y(2S) mesons in PbPb collisions at root s(NN)=5.02 TeV

The second-order Fourier coefficients (v(2)) characterizing the azimuthal distributions of Y(1S) and Y(2S) mesons produced in PbPb collisions at root s(NN) = 5.02 TeV are studied. The Y mesons are reconstructed in their dimuon decay channel, as measured by the CMS detector. The collected data set corresponds to an integrated luminosity of 1.7 nb(-1). The scalar product method is used to extract the v2 coefficients of the azimuthal distributions. Results are reported for the rapidity range vertical bar y vertical bar < 2.4, in the transverse momentum interval 0 < pT < 50 GeV/c, and in three centrality ranges of 10-30%, 30-50% and 50-90%. In contrast to the J/psi mesons, the measured v(2) values for the Y mesons are found to be consistent with zero. (C) 2021 The Author(s). Published by Elsevier B.V.Peer reviewe

Development and validation of HERWIG 7 tunes from CMS underlying-event measurements

This paper presents new sets of parameters (“tunes”) for the underlying-event model of the HERWIG7 event generator. These parameters control the description of multiple-parton interactions (MPI) and colour reconnection in HERWIG7, and are obtained from a fit to minimum-bias data collected by the CMS experiment at s=0.9, 7, and 13Te. The tunes are based on the NNPDF 3.1 next-to-next-to-leading-order parton distribution function (PDF) set for the parton shower, and either a leading-order or next-to-next-to-leading-order PDF set for the simulation of MPI and the beam remnants. Predictions utilizing the tunes are produced for event shape observables in electron-positron collisions, and for minimum-bias, inclusive jet, top quark pair, and Z and W boson events in proton-proton collisions, and are compared with data. Each of the new tunes describes the data at a reasonable level, and the tunes using a leading-order PDF for the simulation of MPI provide the best description of the dat

Measurement of b jet shapes in proton-proton collisions at root s=5.02 TeV

We present the first study of charged-hadron production associated with jets originating from b quarks in proton-proton collisions at a center-of-mass energy of 5.02 TeV. The data sample used in this study was collected with the CMS detector at the CERN LHC and corresponds to an integrated luminosity of 27.4 pb(-1). To characterize the jet substructure, the differential jet shapes, defined as the normalized transverse momentum distribution of charged hadrons as a function of angular distance from the jet axis, are measured for b jets. In addition to the jet shapes, the per-jet yields of charged particles associated with b jets are also quantified, again as a function of the angular distance with respect to the jet axis. Extracted jet shape and particle yield distributions for b jets are compared with results for inclusive jets, as well as with the predictions from the pythia and herwig++ event generators.Peer reviewe

Search for Physics beyond the Standard Model in Events with Overlapping Photons and Jets

Results are reported from a search for new particles that decay into a photon and two gluons, in events with jets. Novel jet substructure techniques are developed that allow photons to be identified in an environment densely populated with hadrons. The analyzed proton-proton collision data were collected by the CMS experiment at the LHC, in 2016 at root s = 13 TeV, and correspond to an integrated luminosity of 35.9 fb(-1). The spectra of total transverse hadronic energy of candidate events are examined for deviations from the standard model predictions. No statistically significant excess is observed over the expected background. The first cross section limits on new physics processes resulting in such events are set. The results are interpreted as upper limits on the rate of gluino pair production, utilizing a simplified stealth supersymmetry model. The excluded gluino masses extend up to 1.7 TeV, for a neutralino mass of 200 GeV and exceed previous mass constraints set by analyses targeting events with isolated photons.Peer reviewe

Measurement of B-c(2S)(+) and B-c*(2S)(+) cross section ratios in proton-proton collisions at root s=13 TeV

Peer reviewe

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