Pub Date : 2023-01-01DOI: 10.1590/s1678-3921.pab2023.v58.03127
Miguel Augusto Moraes, Mariana Oliveira-Silva, Rafael Silva Goulart, Manoel Henrique Cintra Gabarra, Carlos Eduardo Saraiva Miranda, Paulo Garcia de Almeida, André Pitondo-Silva
Abstract The objective of this work was to evaluate the antimicrobial activity of four new potassium monopersulfate-based products on bacterial biofilms associated with avian infections, in order to disinfect drinking fountains in poultry farms. Initially, tests were performed in planktonic bacterial cells, to verify the antimicrobial activity and the minimum inhibitory concentration of the products, named PA, PB, PC, and PD. These products were tested on mature biofilms of the avian pathogens Escherichia coli, Salmonella enterica subsp. enterica serovar Enteritidis, and Listeria monocytogenes, grown on specimens preserved in acrylic blocks, by counting colony-forming units, scanning electron microscopy, and confocal fluorescence microscopy. All products were effective against the evaluated bacterial species. The PA and PB products inhibited the bacterial growth at ≤ 0.13% concentrations, and PC and PD showed the same effect at ≤ 0.25% concentrations. Furthermore, the PA product was able to eliminate mature biofilms of S. enterica subsp. enterica serovar Enteritidis and L. monocytogenes. The evaluated monopersulfate-based products, notably PA, are effective against bacterial biofilms associated with avian infections and show potential as sanitizers and disinfectants for drinking fountains in poultry farms.
{"title":"Antimicrobial activity of products based on potassium monopersulfate on bacteria associated with avian infections","authors":"Miguel Augusto Moraes, Mariana Oliveira-Silva, Rafael Silva Goulart, Manoel Henrique Cintra Gabarra, Carlos Eduardo Saraiva Miranda, Paulo Garcia de Almeida, André Pitondo-Silva","doi":"10.1590/s1678-3921.pab2023.v58.03127","DOIUrl":"https://doi.org/10.1590/s1678-3921.pab2023.v58.03127","url":null,"abstract":"Abstract The objective of this work was to evaluate the antimicrobial activity of four new potassium monopersulfate-based products on bacterial biofilms associated with avian infections, in order to disinfect drinking fountains in poultry farms. Initially, tests were performed in planktonic bacterial cells, to verify the antimicrobial activity and the minimum inhibitory concentration of the products, named PA, PB, PC, and PD. These products were tested on mature biofilms of the avian pathogens Escherichia coli, Salmonella enterica subsp. enterica serovar Enteritidis, and Listeria monocytogenes, grown on specimens preserved in acrylic blocks, by counting colony-forming units, scanning electron microscopy, and confocal fluorescence microscopy. All products were effective against the evaluated bacterial species. The PA and PB products inhibited the bacterial growth at ≤ 0.13% concentrations, and PC and PD showed the same effect at ≤ 0.25% concentrations. Furthermore, the PA product was able to eliminate mature biofilms of S. enterica subsp. enterica serovar Enteritidis and L. monocytogenes. The evaluated monopersulfate-based products, notably PA, are effective against bacterial biofilms associated with avian infections and show potential as sanitizers and disinfectants for drinking fountains in poultry farms.","PeriodicalId":19826,"journal":{"name":"Pesquisa Agropecuaria Brasileira","volume":"335 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136305570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1590/s1678-3921.pab2023.v58.03221
Xinyuan Han, Chen Yang, Xiao Weihua, Jie Zhou, Wenfeng Li
Abstract The objective of this work was to establish and validate the dry matter distribution and yield prediction models based on physiological developmental timing, to compare the differences between the dry mass distribution index model and the dry mass distribution coefficient model, for the simulation of ear dry mass and to improve the accuracy of maize growth models for predicting yield. The experiments were conducted in three tropical sites (Longchuan, Mangshi, and Ruili) in the tropical region of Yunnan Province, China. The NRMS of ear dry mass and yield were generally less than 10. The dry mass distribution index method (NRMS = 5.44% and RMSE = 807.22 kg ha-1 for ear dry mass; and NRMS = 7.32% and RMSE = 707.67 kg ha-1 for grain yield) is better than the dry mass distribution coefficient method (NRMS = 7.52% and RMSE = 1115.31 kg ha-1 for ear dry mass; NRMS = 8.6% and RMSE = 830.76 kgha-1 for grain yield) to simulate maize ear dry mass and grain yield. The distribution index model improves the accuracy of the model, which is valuable for future maize production and management in Yunnan.
摘要本研究旨在建立并验证基于生理发育时间的玉米干物质分布和产量预测模型，比较干质量分布指数模型与干质量分配系数模型之间的差异，用于玉米穗干质量的模拟，提高玉米生长模型预测产量的准确性。试验在云南省热带地区的龙川、芒市和瑞丽三个热带站点进行。穗干质量和产量的NRMS均小于10。耳干质量分布指数法(NRMS = 5.44%， RMSE = 807.22 kg ha-1);籽粒产量的NRMS = 7.32%， RMSE = 707.67 kg ha-1)优于干质量分配系数法(穗干质量的NRMS = 7.52%， RMSE = 1115.31 kg ha-1);NRMS = 8.6%， RMSE = 830.76 kga -1(产量)，模拟玉米穗干质量和产量。该分布指数模型提高了模型的准确性，对云南未来玉米生产经营具有一定的参考价值。
{"title":"Modeling the yield of winter maize using biomass distribution index in the tropical region of Yunnan, China","authors":"Xinyuan Han, Chen Yang, Xiao Weihua, Jie Zhou, Wenfeng Li","doi":"10.1590/s1678-3921.pab2023.v58.03221","DOIUrl":"https://doi.org/10.1590/s1678-3921.pab2023.v58.03221","url":null,"abstract":"Abstract The objective of this work was to establish and validate the dry matter distribution and yield prediction models based on physiological developmental timing, to compare the differences between the dry mass distribution index model and the dry mass distribution coefficient model, for the simulation of ear dry mass and to improve the accuracy of maize growth models for predicting yield. The experiments were conducted in three tropical sites (Longchuan, Mangshi, and Ruili) in the tropical region of Yunnan Province, China. The NRMS of ear dry mass and yield were generally less than 10. The dry mass distribution index method (NRMS = 5.44% and RMSE = 807.22 kg ha-1 for ear dry mass; and NRMS = 7.32% and RMSE = 707.67 kg ha-1 for grain yield) is better than the dry mass distribution coefficient method (NRMS = 7.52% and RMSE = 1115.31 kg ha-1 for ear dry mass; NRMS = 8.6% and RMSE = 830.76 kgha-1 for grain yield) to simulate maize ear dry mass and grain yield. The distribution index model improves the accuracy of the model, which is valuable for future maize production and management in Yunnan.","PeriodicalId":19826,"journal":{"name":"Pesquisa Agropecuaria Brasileira","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135261477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1590/s1678-3921.pab2023.v58.03212
Adélia Ferreira Dargère, Sandra Maria Pinto, Jonas Guimarães e Silva, Cesar Augusto Pospissil Garbossa, Diogo Santos Batista, Laryssa Fernandes Correia, Joanna Oliveira Marçal, Peter Bitencourt Faria
Abstract The objective of this work was to determine the fatty acid profile of artisanal Minas cheese from seven certified regions in the state of Minas Gerais, Brazil. A total of 78 samples were collected in regions where the producers were registered by Instituto Mineiro de Agropecuária. For lipid profile determination, different cheese varieties from the following regions were analyzed: Canastra, Serro, Araxá, Serra do Salitre, Triângulo Mineiro, Campo das Vertentes, and Cerrado. The lipid profile of Serra do Salitre and Araxá cheeses was similar in caproic acid (C6:0), total polyunsaturated fatty acids, and ratio of polyunsaturated and saturated fatty acids. In the other regions, lipid profile differed due to associations with specific fatty acids, such as those of the cheeses from Triângulo Mineiro with C20:5n3, of Cerrado with C20:4n6, of Canastra with C8:0, of Serro with C22:2 and C22:6n3, and of Campo das Vertentes with C17:0, C18:0, and C20:0. The fatty acid profile and nutritional indices related to the lipid profile of artisanal Minas cheeses differ according to the region of origin. The content and profile of omega 3 fatty acids are significant parameters to differentiate artisanal Minas cheeses. Serro artisanal Minas cheese presents superior nutritional indices concerning fatty acid profile than the other studied cheeses.
摘要:本研究的目的是测定巴西米纳斯吉拉斯州七个认证地区的手工米纳斯吉拉斯州奶酪的脂肪酸谱。在生产者由Mineiro de Instituto Agropecuária登记的地区共收集了78个样本。为了测定脂质谱，分析了来自以下地区的不同奶酪品种:Canastra、Serro、arax、Serra do Salitre、tri ngulo Mineiro、Campo das Vertentes和Cerrado。Serra do Salitre和arax奶酪的脂质谱在己酸(C6:0)、总多不饱和脂肪酸和多不饱和脂肪酸与饱和脂肪酸的比值方面相似。在其他地区，由于与特定脂肪酸的关联，脂质谱有所不同，例如tri ngulo Mineiro的奶酪与C20:5n3有关，塞拉多的与C20:4n6有关，Canastra的与C8:0有关，Serro的与C22:2和C22:6n3有关，Campo das Vertentes的与C17:0, C18:0和C20:0有关。手工米纳斯奶酪的脂肪酸分布和与脂质分布相关的营养指标因产地而异。omega - 3脂肪酸的含量和分布是区分手工米纳斯奶酪的重要参数。Serro手工米纳斯奶酪在脂肪酸分布方面的营养指标优于其他奶酪。
{"title":"Lipid profile of artisanal Minas cheese from certified regions in the state of Minas Gerais, Brazil","authors":"Adélia Ferreira Dargère, Sandra Maria Pinto, Jonas Guimarães e Silva, Cesar Augusto Pospissil Garbossa, Diogo Santos Batista, Laryssa Fernandes Correia, Joanna Oliveira Marçal, Peter Bitencourt Faria","doi":"10.1590/s1678-3921.pab2023.v58.03212","DOIUrl":"https://doi.org/10.1590/s1678-3921.pab2023.v58.03212","url":null,"abstract":"Abstract The objective of this work was to determine the fatty acid profile of artisanal Minas cheese from seven certified regions in the state of Minas Gerais, Brazil. A total of 78 samples were collected in regions where the producers were registered by Instituto Mineiro de Agropecuária. For lipid profile determination, different cheese varieties from the following regions were analyzed: Canastra, Serro, Araxá, Serra do Salitre, Triângulo Mineiro, Campo das Vertentes, and Cerrado. The lipid profile of Serra do Salitre and Araxá cheeses was similar in caproic acid (C6:0), total polyunsaturated fatty acids, and ratio of polyunsaturated and saturated fatty acids. In the other regions, lipid profile differed due to associations with specific fatty acids, such as those of the cheeses from Triângulo Mineiro with C20:5n3, of Cerrado with C20:4n6, of Canastra with C8:0, of Serro with C22:2 and C22:6n3, and of Campo das Vertentes with C17:0, C18:0, and C20:0. The fatty acid profile and nutritional indices related to the lipid profile of artisanal Minas cheeses differ according to the region of origin. The content and profile of omega 3 fatty acids are significant parameters to differentiate artisanal Minas cheeses. Serro artisanal Minas cheese presents superior nutritional indices concerning fatty acid profile than the other studied cheeses.","PeriodicalId":19826,"journal":{"name":"Pesquisa Agropecuaria Brasileira","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135262468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1590/s1678-3921.pab2023.v58.03038
Camila Vancini, Gisele Abigail Montan Torres, Luciano Consoli, João Leodato Nunes Maciel, Ricardo Lima de Castro, Natália Forchezato Webber, Diógenes Cecchin Silveira, Carolina Cardoso Deuner
Abstract The objective of this work was to evaluate the effect of the presence of 2NVS translocation on the inheritance of wheat resistance to head blast, in F2 segregating lines from two biparental crosses. The IPF 86766 and 'Santa Fe' genotypes were used as female parents (both 2NVS carriers), and 'BRS 404', as the common male parent (non 2NVS carrier). Using a mixture of three isolates of Pyricularia oryzae Triticum, wheat spikes and rachises were evaluated for bleaching severity at five (%BS_5dpi) and seven days post-inoculation (%BS_7dpi), as well as for the number of infection points (IPR) and pathogen sporulation (SPO). Chi-square analyses showed that segregation follows a 3:1 Mendelian hypothesis, with a major locus with a dominant allele: %BS_7dpi for IPF 86766 × 'BRS 404' and IPR for 'Santa Fe' x 'BRS 404'. Therefore, this is the first known study to show that the 2NVS translocation responsible for resistance to head blast is a major locus with a dominant allele. In a controlled environment, 'BRS 404' shows bleaching severity and SPO similar with those occurring on IPF 86766 and 'Santa Fe'.
{"title":"2NVS translocation presence and inheritance of resistance to head blast in wheat","authors":"Camila Vancini, Gisele Abigail Montan Torres, Luciano Consoli, João Leodato Nunes Maciel, Ricardo Lima de Castro, Natália Forchezato Webber, Diógenes Cecchin Silveira, Carolina Cardoso Deuner","doi":"10.1590/s1678-3921.pab2023.v58.03038","DOIUrl":"https://doi.org/10.1590/s1678-3921.pab2023.v58.03038","url":null,"abstract":"Abstract The objective of this work was to evaluate the effect of the presence of 2NVS translocation on the inheritance of wheat resistance to head blast, in F2 segregating lines from two biparental crosses. The IPF 86766 and 'Santa Fe' genotypes were used as female parents (both 2NVS carriers), and 'BRS 404', as the common male parent (non 2NVS carrier). Using a mixture of three isolates of Pyricularia oryzae Triticum, wheat spikes and rachises were evaluated for bleaching severity at five (%BS_5dpi) and seven days post-inoculation (%BS_7dpi), as well as for the number of infection points (IPR) and pathogen sporulation (SPO). Chi-square analyses showed that segregation follows a 3:1 Mendelian hypothesis, with a major locus with a dominant allele: %BS_7dpi for IPF 86766 × 'BRS 404' and IPR for 'Santa Fe' x 'BRS 404'. Therefore, this is the first known study to show that the 2NVS translocation responsible for resistance to head blast is a major locus with a dominant allele. In a controlled environment, 'BRS 404' shows bleaching severity and SPO similar with those occurring on IPF 86766 and 'Santa Fe'.","PeriodicalId":19826,"journal":{"name":"Pesquisa Agropecuaria Brasileira","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136303029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The objective of this work was to identify the effect of potassium rates on Bt transgenic resistance and damage caused by Spodoptera frugiperda in corn plants at different developmental stages. The experimental design was a randomized complete block in a 3x6 factorial arrangement, with three potassium rates (0, 45, and 90 kg ha-1) and six corn hybrids (20A55Hx, 30A77PW, AG1051, MG652PW, NS90VTPro2, and NS92VTPro), with three replicates. The hybrids were evaluated through the analysis of canonical variables. With low potassium rates, the effectiveness of the corn hybrids in controlling the S. frugiperda caterpillar decreases in the different phenological stages. The use of the Bt technology is more efficient under an adequate potassium rate of 90 kg ha-1 KCl.
摘要本研究旨在研究施钾量对不同发育阶段玉米对Bt转基因玉米的抗性及穗状夜蛾危害的影响。试验设计采用3 × 6因子随机完全区组设计，采用3个钾浓度(0、45和90 kg ha-1)和6个玉米杂交品种(20A55Hx、30A77PW、AG1051、MG652PW、NS90VTPro2和NS92VTPro)， 3个重复。通过典型变量分析对杂种进行评价。施钾量较低时，玉米杂交种防治金翅虫的效果在不同物候阶段均呈下降趋势。在90 kg ha-1 KCl的适钾量下，Bt技术的使用效率更高。
{"title":"Interrelationship between potassium rates and the efficiency of Bt genes in the control of Spodoptera frugiperda","authors":"Marcelo Macedo Faria, Pedro Henrique Nascimento Cintra, Víctor Alves Amorim, Thiago Souza Campos, Ednaldo Cândido Rocha, Fabricio Rodrigues","doi":"10.1590/s1678-3921.pab2023.v58.03241","DOIUrl":"https://doi.org/10.1590/s1678-3921.pab2023.v58.03241","url":null,"abstract":"Abstract The objective of this work was to identify the effect of potassium rates on Bt transgenic resistance and damage caused by Spodoptera frugiperda in corn plants at different developmental stages. The experimental design was a randomized complete block in a 3x6 factorial arrangement, with three potassium rates (0, 45, and 90 kg ha-1) and six corn hybrids (20A55Hx, 30A77PW, AG1051, MG652PW, NS90VTPro2, and NS92VTPro), with three replicates. The hybrids were evaluated through the analysis of canonical variables. With low potassium rates, the effectiveness of the corn hybrids in controlling the S. frugiperda caterpillar decreases in the different phenological stages. The use of the Bt technology is more efficient under an adequate potassium rate of 90 kg ha-1 KCl.","PeriodicalId":19826,"journal":{"name":"Pesquisa Agropecuaria Brasileira","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135059732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1590/s1678-3921.pab2023.v58.03224
Douglas André Wurz, Alberto Fontanella Brighenti, Ricardo Allebrandt, Leo Rufato
Abstract The objective of this work was to evaluate the effect of increasing bud load per plant on epidemiological variables of downy mildew on 'Sauvignon Blanc'. The study was carried out in a commercial vineyard in a high-altitude region of the municipality of São Joaquim, in the state of Santa Catarina, Brazil, during the 2016/2017 and 2017/2018 vintages. The treatments consisted of four bud loads: 15, 30, 50, and 75 per vine. The maximum incidence, maximum severity, beginning of symptom appearance, time to reach maximum disease incidence and severity, area under the incidence and severity disease progress curve were determined. Increasing bud load over 50 per vine results in higher incidence and severity of downy mildew (Plasmopara viticola) in 'Sauvignon Blanc' leaves but does not influence the time to reach maximum disease incidence and severity. Increasing bud load over 50 per vine results in an increase in the area under the disease incidence and severity progress curve for downy mildew in 'Sauvignon Blanc' leaves. To adopt over 50 buds per vine treatment, it is necessary additional disease control measures, with an emphasis on integrated management to control downy mildew.
摘要本研究旨在评价增加单株芽量对长相思霜霉病流行病学变量的影响。该研究于2016/2017和2017/2018年份在巴西圣卡塔琳娜州s o Joaquim市高海拔地区的一个商业葡萄园进行。处理包括4个芽负荷:每株15、30、50和75个。测定最大发病率、最大严重程度、症状开始出现、达到最大发病率和严重程度的时间、发病率和严重程度疾病进展曲线下的面积。每棵葡萄增加50个以上的芽负荷会导致白苏维翁叶片霜霉病的发病率和严重程度增加，但不影响达到最高发病率和严重程度的时间。当每株葡萄增加50个以上的芽量时，长相思白霜霉病发病和严重程度进展曲线下的面积就会增加。采用每株50芽以上的处理，需要额外的疾病控制措施，重点是综合管理，以控制霜霉病。
{"title":"Temporal dynamics of Plasmopara viticola as function of bud load increase in 'Sauvignon Blanc'","authors":"Douglas André Wurz, Alberto Fontanella Brighenti, Ricardo Allebrandt, Leo Rufato","doi":"10.1590/s1678-3921.pab2023.v58.03224","DOIUrl":"https://doi.org/10.1590/s1678-3921.pab2023.v58.03224","url":null,"abstract":"Abstract The objective of this work was to evaluate the effect of increasing bud load per plant on epidemiological variables of downy mildew on 'Sauvignon Blanc'. The study was carried out in a commercial vineyard in a high-altitude region of the municipality of São Joaquim, in the state of Santa Catarina, Brazil, during the 2016/2017 and 2017/2018 vintages. The treatments consisted of four bud loads: 15, 30, 50, and 75 per vine. The maximum incidence, maximum severity, beginning of symptom appearance, time to reach maximum disease incidence and severity, area under the incidence and severity disease progress curve were determined. Increasing bud load over 50 per vine results in higher incidence and severity of downy mildew (Plasmopara viticola) in 'Sauvignon Blanc' leaves but does not influence the time to reach maximum disease incidence and severity. Increasing bud load over 50 per vine results in an increase in the area under the disease incidence and severity progress curve for downy mildew in 'Sauvignon Blanc' leaves. To adopt over 50 buds per vine treatment, it is necessary additional disease control measures, with an emphasis on integrated management to control downy mildew.","PeriodicalId":19826,"journal":{"name":"Pesquisa Agropecuaria Brasileira","volume":"154 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135059744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1590/s1678-3921.pab2023.v58.03079
Liliandra Barreto Emídio Gomes, Thamires Ferreira Rodrigues da Silva, Gabriela Cavalcanti Alves, Veronica Massena Reis
Abstract The objective of this work was to evaluate inoculation response to Azospirillum baldaniorum strain Sp245 in 14 Urochloa cultivars. The evaluated cultivars were: Marandú, Xaraés, Paiaguás, Piatã, Basilisk, B140, Comum, Tupi, H47, Llanero, Ruziziensis, Ipyporã, Mulato, and Convert HD364. Three experiments were conducted to measure root traits: two using soil and one a sterile substrate. Compared with the control, a single application of A. baldaniorum Sp245 increases dry matter accumulation and number of roots in cultivars Marandú, Llanero, Ruziziensis, and Convert HD364. However, after inoculation, cultivars Xaraés and Ipyporã show some root traits with lower values.
{"title":"Growth promotion in different Urochloa species inoculated with Azospirillum baldaniorum","authors":"Liliandra Barreto Emídio Gomes, Thamires Ferreira Rodrigues da Silva, Gabriela Cavalcanti Alves, Veronica Massena Reis","doi":"10.1590/s1678-3921.pab2023.v58.03079","DOIUrl":"https://doi.org/10.1590/s1678-3921.pab2023.v58.03079","url":null,"abstract":"Abstract The objective of this work was to evaluate inoculation response to Azospirillum baldaniorum strain Sp245 in 14 Urochloa cultivars. The evaluated cultivars were: Marandú, Xaraés, Paiaguás, Piatã, Basilisk, B140, Comum, Tupi, H47, Llanero, Ruziziensis, Ipyporã, Mulato, and Convert HD364. Three experiments were conducted to measure root traits: two using soil and one a sterile substrate. Compared with the control, a single application of A. baldaniorum Sp245 increases dry matter accumulation and number of roots in cultivars Marandú, Llanero, Ruziziensis, and Convert HD364. However, after inoculation, cultivars Xaraés and Ipyporã show some root traits with lower values.","PeriodicalId":19826,"journal":{"name":"Pesquisa Agropecuaria Brasileira","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135700374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1590/s1678-3921.pab2023.v58.03267
Poliana Regina Carloni, Thiago Lívio Pessoa Oliveira de Souza, Marcelo Sfeir de Aguiar, Leonardo Cunha Melo, Patrícia Guimarães Santos Melo, Helton Santos Pereira
Abstract The objective of this work was to estimate the genetic parameters, evaluate the agronomic performance, and validate the microsatellite molecular markers (SSRs) linked with quantitative trait loci (QTLs) for Fe and Zn concentrations in grains of common bean, in order to select superior lines. One hundred and sixteen lines from two populations ('BRS Requinte' × 'Porto Real' and 'BRS Requinte' × G2358) and five check genotypes were evaluated in three environments. The parents and lines were genotyped with 20 SSRs. In the simultaneous selection of the lines for the four evaluated traits, the gains from selection were 4.7% for Fe concentration, 2.8% for Zn concentration, 3.9% for yield, and 0.9% for 100-seed weight. Therefore, there is the possibility of selection of lines that combine desirable phenotypes for the traits of interest. The only polymorphic marker is BM 154 in the 'BRS Requinte' × 'Porto Real' population, indicating that the QTLs linked with the markers may already be fixed or that the markers are not associated in the used populations. The single-marker analysis of QTL mapping shows an association between BM 154 and Fe concentration in only one environment, explaining 14.5% of phenotypic variation, which indicates the occurrence of the interaction of QTLs with environments.
{"title":"Genetic parameters and validation of microsatellite markers associated with iron and zinc in common bean","authors":"Poliana Regina Carloni, Thiago Lívio Pessoa Oliveira de Souza, Marcelo Sfeir de Aguiar, Leonardo Cunha Melo, Patrícia Guimarães Santos Melo, Helton Santos Pereira","doi":"10.1590/s1678-3921.pab2023.v58.03267","DOIUrl":"https://doi.org/10.1590/s1678-3921.pab2023.v58.03267","url":null,"abstract":"Abstract The objective of this work was to estimate the genetic parameters, evaluate the agronomic performance, and validate the microsatellite molecular markers (SSRs) linked with quantitative trait loci (QTLs) for Fe and Zn concentrations in grains of common bean, in order to select superior lines. One hundred and sixteen lines from two populations ('BRS Requinte' × 'Porto Real' and 'BRS Requinte' × G2358) and five check genotypes were evaluated in three environments. The parents and lines were genotyped with 20 SSRs. In the simultaneous selection of the lines for the four evaluated traits, the gains from selection were 4.7% for Fe concentration, 2.8% for Zn concentration, 3.9% for yield, and 0.9% for 100-seed weight. Therefore, there is the possibility of selection of lines that combine desirable phenotypes for the traits of interest. The only polymorphic marker is BM 154 in the 'BRS Requinte' × 'Porto Real' population, indicating that the QTLs linked with the markers may already be fixed or that the markers are not associated in the used populations. The single-marker analysis of QTL mapping shows an association between BM 154 and Fe concentration in only one environment, explaining 14.5% of phenotypic variation, which indicates the occurrence of the interaction of QTLs with environments.","PeriodicalId":19826,"journal":{"name":"Pesquisa Agropecuaria Brasileira","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135261464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The objective of this work was to evaluate the potential of cover plants in reducing the population of the two-spotted spider mite, Te t r a n y c h u s urticae, in soybean. Seven host plants – cotton (Gossypium hirsutum), Urochloa ruziziensis, crotalaria (Crotalaria juncea), corn (Zea mays), radish (Raphanus sativus), soybean (Glycine max), and sorghum (Sorghum bicolor) – were evaluated for their effect on T. urticae biological parameters (oviposition, development stages, and survival) and preference for volatile odors (using a Y-tube olfactometer). Tetranychus urticae preferred cotton and showed a higher population growth rate on this host plant. The survival and oviposition of T. urticae was prolonged in radish and crotalaria plants, whereas juveniles did not complete their immature development on U. ruziziensis leaves. No preference was observed between the volatile odors of U. ruziziensis, radish, and crotalaria. Urochloa ruziziensis can reduce T. urticae populations in soybean plants.
{"title":"Cover plants with potential to reduce two-spotted spider mite population in soybean","authors":"Luana Cristina Alves Ribeiro, Felipe Lemos, Dalila Dominique Duarte Rocha, Marcos Antônio Matiello Fadini","doi":"10.1590/s1678-3921.pab2023.v58.03332","DOIUrl":"https://doi.org/10.1590/s1678-3921.pab2023.v58.03332","url":null,"abstract":"Abstract The objective of this work was to evaluate the potential of cover plants in reducing the population of the two-spotted spider mite, Te t r a n y c h u s urticae, in soybean. Seven host plants – cotton (Gossypium hirsutum), Urochloa ruziziensis, crotalaria (Crotalaria juncea), corn (Zea mays), radish (Raphanus sativus), soybean (Glycine max), and sorghum (Sorghum bicolor) – were evaluated for their effect on T. urticae biological parameters (oviposition, development stages, and survival) and preference for volatile odors (using a Y-tube olfactometer). Tetranychus urticae preferred cotton and showed a higher population growth rate on this host plant. The survival and oviposition of T. urticae was prolonged in radish and crotalaria plants, whereas juveniles did not complete their immature development on U. ruziziensis leaves. No preference was observed between the volatile odors of U. ruziziensis, radish, and crotalaria. Urochloa ruziziensis can reduce T. urticae populations in soybean plants.","PeriodicalId":19826,"journal":{"name":"Pesquisa Agropecuaria Brasileira","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135262465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1590/s1678-3921.pab2023.v58.03197
Gabriel Laquete de Barros, Rafael Pio, Carlos Henrique Milagres Ribeiro, Lucídio Henriques Vote Fazenda, Alexandre Dias da Silva, Pedro Maranha Peche
Abstract The objective of this work was to evaluate the pruning management of the BRS Tupy and Brazos blackberry cultivars, in order to extend their harvest seasonality and fruit yield. The experiment was performed in an altitude subtropical region in the state of Minas Gerais, Brazil. Bushes were grown at 3.0x0.5 m spacing. The treatments consisted of the four following pruning seasons: one conventional pruning, with suppression of the produced stems in February and reduction of the stems in July; and three drastic pruning performed in the first two weeks of January, March, and May, with the application of 10% urea and 3% hydrogenated cyanamide five months later. The experimental design was in randomized complete blocks, in a 2x4 factorial arrangement, with two cultivars and four pruning managements, with four blocks. Fruit phenology, yield, and physicochemical quality were evaluated in two production cycles. It is possible to extend the harvest season of blackberry up to five months, in an altitude subtropical region in Lavras, in the state of Minas Gerais, Brazil, with drastic pruning in January and no irrigation. Drastic pruning in January or March increases the yield of the BRS Tupy and Brazos blackberry cultivars. The extended harvest season does not affect the quality of blackberries and does not create challenges for harvesting operations.
{"title":"Management of blackberry pruning to extend harvest seasonality","authors":"Gabriel Laquete de Barros, Rafael Pio, Carlos Henrique Milagres Ribeiro, Lucídio Henriques Vote Fazenda, Alexandre Dias da Silva, Pedro Maranha Peche","doi":"10.1590/s1678-3921.pab2023.v58.03197","DOIUrl":"https://doi.org/10.1590/s1678-3921.pab2023.v58.03197","url":null,"abstract":"Abstract The objective of this work was to evaluate the pruning management of the BRS Tupy and Brazos blackberry cultivars, in order to extend their harvest seasonality and fruit yield. The experiment was performed in an altitude subtropical region in the state of Minas Gerais, Brazil. Bushes were grown at 3.0x0.5 m spacing. The treatments consisted of the four following pruning seasons: one conventional pruning, with suppression of the produced stems in February and reduction of the stems in July; and three drastic pruning performed in the first two weeks of January, March, and May, with the application of 10% urea and 3% hydrogenated cyanamide five months later. The experimental design was in randomized complete blocks, in a 2x4 factorial arrangement, with two cultivars and four pruning managements, with four blocks. Fruit phenology, yield, and physicochemical quality were evaluated in two production cycles. It is possible to extend the harvest season of blackberry up to five months, in an altitude subtropical region in Lavras, in the state of Minas Gerais, Brazil, with drastic pruning in January and no irrigation. Drastic pruning in January or March increases the yield of the BRS Tupy and Brazos blackberry cultivars. The extended harvest season does not affect the quality of blackberries and does not create challenges for harvesting operations.","PeriodicalId":19826,"journal":{"name":"Pesquisa Agropecuaria Brasileira","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135059746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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