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    Genetic variation, agronomic potential, and acylsugar content in Santa Cruz dwarf tomato after backcrossings
    (Crop Breeding and Applied Biotechnology, 2024) Ribeiro, Ana Luisa Alves; Maciel, Gabriel Mascarenhas; Siquieroli, Ana Carolina Silva; Pereira, Lucas Medeiros; Silva, Nilo Cesar Queiroga; Oliveira, Camila Soares de; Pinto, Frederico Garcia
    Tomato cultivation is globally significant, demanding enhanced yields and biotic stress resilience for sustainability. Dwarf plant utilization in tomato genetic enhancement offers underexplored benefits. Yet, Santa Cruz dwarf tomato germplasm is unavailable. This study evaluated genetic dissimilarity, agronomic potential, and acylsugar content of Santa Cruz dwarf tomato plants across three successive backcrossings. Twelve advanced backcrossing populations (BC) and a commercial control (cv. Kada) were assessed, totaling 15 treatments. Agronomic traits and acylsugar content were measured, and analysis techniques were applied to assess genetic dissimilarity and backcrossing superiority. BC3 populations UFU-Sci#8, UFU-Sci#6, UFU-Sci#5, and UFU-Sci#1 excelled. Dwarf plants predominantly exhibited high leaflet acylsugar levels, suggesting potential for acquisition of hybrid with pest resistance. Notably, UFU MC TOM1 (dwarf plant) displayed significant glycine and L-serine presence, associated with various biotic stresses. These findings unveil the promising creation of dwarf Santa Cruz tomato hybrids with a broad spectrum of resistance.
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    Applications of linear mixed models in Cynodon spp. breeding
    (Crop Breeding and Applied Biotechnology, 2024) Elizeu , Arthur Mayrink; Peixoto, Marco Antônio; Evangelista, Jeniffer Santana Pinto Coelho; Chaves, Saulo Fabrício da Silva; Nascimento, Emanuel Ferrari; Benites, Flávio; Teodoro, Paulo Eduardo; Dias, Kaio Olimpio das Gracas; Bhering, Leonardo Lopes
    Species of the genus Cynodon are among the most cultivated forage crops in the world due to their high yield and nutritional quality, and its use in cattle feeding has been associated with gains in animal weight and increased milk production. The objective of this study was to model covariance structures in Cynodon spp. clones and study the changes in ranking of the selected genotypes, since it is believed that affects the ranking of genotypes. A total of 202 genotypes were evaluated in an experiment conducted in an augmented block design with four replications and four harvests. The genotypes were assessed for plant height, green weight, percentage of dry matter, and plant vigor. Nineteen repeated measures models with different covariance structures were tested. The best-fitted model adopts the CORH covariance structure for the genetic effects. Correct modeling of the covariance structure affected the ranking of genotypes in all variables evaluated.
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    Identification of RILs for agronomic and grain quality traits in rice through intraspecific crosses
    (Crop Breeding and Applied Biotechnology, 2024) Silva, Raissa Martins da; Thurow, Liamara Bahr; Nardino, Maicon; Oliveira, Victoria Freitas de; Lopes, Jennifer Luz; Maltzahn, Latoia Eduarda; Venske, Eduardo; Pegoraro, Camila; Maia, Luciano Carlos da; Oliveira, Antonio Costa
    This study aimed to select recombinant lines and explore phenotypic and genotypic correlations using BLUP. It was conducted in Capão do Leão/RS during two years, in an incomplete block design with intercalary controls, with four replications. 131 and 128 RILs were tested in the F6 in the F7 generations, respectively. Plant height; days to flowering; panicle length; number of panicles per plant; number of fertile and sterile spikelets per panicle; one hundred grains weight; yield per plant; broken, chalky, white-belly and red-streaked grains; vitreous whiteness; gelatinization temperature; and apparent amylose content were obtained. According to the study, line F105 is an elite line for improving grain quality, exhibiting high amylose content (27.041%). Canonical (r=0.817), phenotypic (0.541) and genotypic (0.808) correlations inferred that groups of grain quality and agronomic traits were not independent and there was a tendency for the amylose content to be associated with grain yield.
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    Centro de Referência e Acolhimento LGBT+: o caso de Ouro Preto - Minas Gerais
    (Universidade Federal de Viçosa, 2026-06-25) Diniz, Maria Clara de Paula; Ribeiro, Daniella Borges; http://lattes.cnpq.br/9164241683487713
    O presente trabalho, partindo das inquietações e reflexões da autora, expõe, através de uma retomada histórica, a concepção das sexualidades dissidentes à época da colonização portuguesa e a influência veemente dos dogmas e da moral cristã na perseguição das pessoas que cometiam o pecado nefando. O objetivo geral desta pesquisa é investigar como foi o processo de criação e implementação do Centro de Referência e Acolhimento LGBT+ do município de Ouro Preto/MG, bem como seus avanços e desafios. Trata-se de um estudo de caráter eminentemente qualitativo e exploratório, utilizou-se, também, de pesquisas bibliográficas e documentais para elaborar discussões acerca do modo de produção capitalista e do surgimento das políticas sociais. Além disso, destaca-se a maneira como o Brasil se insere na dinâmica capitalista mundial – dependente e periférica – e rebatimentos disso para as conformidades e as particularidades das políticas sociais brasileiras, principalmente as políticas LGBT+. Para a coleta de dados conduzimos entrevistas presencialmente com sete dos doze trabalhadores do equipamento. Os dados foram analisados a partir da análise crítica levando em consideração o tema. Os resultados obtidos a partir da pesquisa realizada no Centro de Referência e Acolhimento LGBT+ de Ouro Preto/Minas Gerais, demonstram que este serviço se configura como um avanço para a promoção e defesa dos direitos das pessoas LGBT+, o equipamento tem como proposta ser um lugar seguro e acolhedor para que as pessoas possam relatar violências e violações sofridas, serem encaminhadas para serviços de saúde e outros equipamentos da rede socioassistencial, recebam orientações, acessem benefícios disponibilizados pela assistência social e participem de atividades artísticas e culturais. Palavras-chave: direitos humanos ; lutas sociais lgbt+; política social lgbt+.
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    Genetic analysis of yield component traits in cowpea [Vigna unguiculata (L.) Walp.]
    (Crop Breeding and Applied Biotechnology, 2024) Santos, Samíria Pinheiro dos; Araújo, Maurício dos Santos; Aragão, Walter Frazão Lelis de; Silva, Kaesel Jackson Damasceno; Rocha, Maurisrael de Moura
    We investigated the genetic control of the three yield components in cowpea: number of grains per pod, pod length and grain size, in a biparental cross. Genetic parameters were estimated in generations of a cross between two contrasting genitors, using a randomized complete block design with three replications. Narrow-sense heritability estimates varied from 27% to 67%, suggesting that genetic gains can be achieved with selection. Pod length and grain size had the highest heritability values and genetic gains. The number of grains per pod is highly affected by the environment. Dominance was detected for all traits, mainly for pod length. However, additive gene effects accounted for more than 68% of the variation in all traits, which are controlled by at least 10 genes. It is possible to improve the evaluated traits via conventional breeding approaches, although large population sizes will be required in breeding stages.