https://ri.ufs.br/jspui/handle/riufs/2515 2026-09-06T21:16:23Z https://ri.ufs.br/jspui/handle/riufs/26016 Título: Índice -MGIDI e EAN: análise de múltiplos cenários para seleção de progênies de meios-irmãos de milho no semiárido Autor(es): Santos, Mikaely Rosendo dos Abstract: Corn is a crop with high nutritional requirements, especially for nitrogen. A deficiency of this element can restrict plant development. The objective of this study was to evaluate multiple scenarios to identify superior corn genotypes in terms of nitrogen use efficiency for the Semi-arid region, using the MGIDI selection index. Thirty-five corn genotypes were evaluated, with a spacing of 0.20 x 0.70 m. The experiment was conducted in the municipality of Nossa Senhora da Glória, during the 2024 growing season. A randomized block design with split plots and three replications was used, in which nitrogen levels (high and low) were distributed to the main plots and half-sib progenies to the subplots. The data were subjected to analysis of variance and, subsequently, to the MGIDI selection index (Multivariate Genotype-Ideotype Distance Index). Three selection scenarios were considered, resulting in distinct gains among the traits. Among them, the Mandacaru and Cacto scenarios showed greater efficiency in identifying superior genotypes. Among the genotypes evaluated, G50, G1, G22, G26, G42, G4, G34, and G16 showed greater proximity to the ideotype and superior agronomic performance, making them priority candidates for expanded trials and subsequent stages of genetic improvement focused on EAN. 2025-12-16T00:00:00Z https://ri.ufs.br/jspui/handle/riufs/26015 Título: Análise comportamental biológico dos Sitophilus zeamais (Coleoptera: Curculionidae) em diferentes cultivares de milho Autor(es): Matos, Mirle Feitosa de Abstract: The maize weevil, S. zeamais, is one of the main pests of stored corn grains in Brazil, due to the damage caused to the crop and the negative effects associated with its infestation. The objective of this study was to evaluate the resistance of seeds from commercial (F2) and landrace maize cultivars to S. zeamais attack. Bioassays were conducted using choice and no-choice tests, in a completely randomized design (CRD), with nine treatments and six replications. The treatments consisted of five cultivars derived from commercial F2 varieties (Tevo: T-1680 and T-1503; Forseed: FS-533 and FS-560; popcorn maize; and Morgan 616) and three landrace varieties (Cunha, Cateto, and Cacetinho). In the no- choice test, adults were confined with the grains to evaluate the biological parameters of S. zeamais. The shortest mean developmental time was observed in T-1503 (30.70 days) and T-1680 (31.52 days). The highest susceptibility index occurred in T-1503 (13.66) and FS-533 (11.99), whereas T-1680 showed the lowest value (4.76). The highest multiplication rate was observed in T-1503 (3.50) and the lowest in T-1680 (0.33), following a pattern similar to that observed for the instantaneous population growth rate. The greatest weight losses occurred in T-1503 (72.75%) and FS-533 (68.94%), whereas the lowest losses were recorded in T-1680 (8.93%) and popcorn maize (7.17%). In the choice test, the FS-533 treatment showed the highest mean preference (29.18%), while the lowest values were observed in Cateto (2.85%), Morgan (0%), and T-1503 (0%). Overall, the T-1680 genotype presented the lowest values for most of the evaluated variables, characterizing it as the most resistant to S. zeamais attack. 2026-02-05T00:00:00Z https://ri.ufs.br/jspui/handle/riufs/26010 Título: Análise da contribuição do PRONAF para geração de renda no município de Nossa Senhora da Glória/ SE Autor(es): Dantas, Jhessica Karolayne Nascimento de Oliveira Abstract: The present study aimed to analyze the contribution of the National Program for Strengthening Family Agriculture (PRONAF) to income generation among family farmers in the municipality of Nossa Senhora da Glória, state of Sergipe (SE), from 2014 to 2024. The research adopted a qualitative and quantitative approach, with a descriptive nature, based on data obtained from reports of the Banco do Nordeste do Brasil (BNB). The results showed that the PRONAF B Semiárido and PRONAF Comum credit lines were the most accessed. The analyzed data indicate that PRONAF directly contributed to maintaining farmers’ income, especially during the pandemic period, when there was an increase in both the number of contracts and the amounts disbursed. In this context, it is evident that PRONAF plays a fundamental role in the advancement of family farming and in improving producers’ quality of life, particularly in the livestock sector, which was the most utilized by farmers. However, challenges remain in achieving a more equitable and comprehensive performance. 2026-02-03T00:00:00Z https://ri.ufs.br/jspui/handle/riufs/26007 Título: Caracterização morfofisiológica da tolerância ao estresse salino em progênies de meios-irmãos de milho em fase vegetativa Autor(es): Feitosa, José Henrique Andrade Abstract: Salinity is one of the main challenges for agricultural production in semi-arid regions, where maize (Zea mays L.) stands out as one of the most cultivated crops. Although irrigation and the use of fertilizers can mitigate the effects of water and nutritional deficit, the salinity of the water used and fertilizer can compromise the growth and development of plants. Therefore, the present study aimed to characterize the potential of maize half-sib progenies under different salinity levels, aiming to identify genotypes more adapted to salt stress. The experiment was conducted in a protected environment at the experimental farm of the Sertão Campus in Nossa Senhora da Gloria-SE, in 2024. A randomized block design was used, in a 21 x 2 factorial scheme with three replications, totaling 126 plots. Physiological and morphological variables were evaluated under vegetative phase and submitted to analysis of variance and principal components. The analysis of variance indicated significant effects for genotypes, salinity and interaction, mainly on fresh and dry leaf mass. In the principal component analysis, the genotypes G2, G6, G21 and G35 stood out for their greater biomass accumulation and water efficiency. Therefore, high genetic variability and potential for selection of salinity-tolerant materials are evidenced. 2025-12-18T00:00:00Z