Instituto Federal Goiano IF Goiano

Rio Verde de Mato Grosso, Brazil

Instituto Federal Goiano IF Goiano

Rio Verde de Mato Grosso, Brazil
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Guimaraes A.,State University of Goiás | Rodrigues A.S.L.,Instituto Federal Goiano IF Goiano | Malafaia G.,Instituto Federal Goiano IF Goiano
Revista Ambiente e Agua | Year: 2017

The aim of the present study is to assess the use of rapid assessment protocols (RAPs) of rivers as environmental education (EE) instruments in elementary schools. Therefore, EE activities were proposed to students from a Brazilian public elementary school. The activities included ranged from environmental-monitoring workshops to RAPs adapted to the level of schooling of the students. The students completed questionnaires before and after the activities in order to check their degree of knowledge prior to the activities and to assess the information acquired after participation in the activities. The results established that the RAP provided and/or helped to instill social values, knowledge, skills, actions, and competences linked to the environmental conservation of local rivers. The study therefore proves that the use of the RAP would be a valuable addition to EE projects and programs in elementary schools. © 2017, Institute for Environmental Research in Hydrographic Basins (IPABHi). All rights reserved.

Lourenco S.L.O.,State University of Goiás | Luiz M.F.,State University of Goiás | de Jesus F.G.,Instituto Federal Goiano IF Goiano | Carvalho D.D.C.,State University of Goiás | And 2 more authors.
Ciencia Rural | Year: 2017

The deficient development of fertile seeds of native forest plant species in Brazil limits the reproduction of these plants in various conditions. Among the limiting biotic factors in quality and quantity of the forest seeds, borer insects are quite prominent, before and after their dispersion. This study reports for the first time a host of the buprestid beetle Lius conicus (Gory & Laporte, 1840). The larval development of L. conicus takes place in the seed capsules of Vochysia haenkeana Mart. (Vochysiaceae), a typical tree species in the Brazilian cerrado biome. In two regions of the cerrado in Goiás State, Brazil, almost ripe fruits of V. haenkeana were collected directly from the plants. After natural drying, and fruit and seed processing in laboratory, damage caused by the L. conicus larvae was quantified and qualified. Bigger fruits were preferred as hosts. Fruits developing on the eastern side of the plant were most frequently occupied by L. conicus. Seed lots of bigger fruits showed damage up to 37.5% from the infestation by L. conicus larvae. There was only one larva per fruit, which damaged all the seeds of the capsule (three or four) and generally consumed around 26% of the seed dry mass. © 2017, Universidade Federal de Santa Maria. All rights reserved.

Valdisser P.A.M.R.,Embrapa Arroz e Feijao CNPAF | Valdisser P.A.M.R.,University of Campinas | Pereira W.J.,University of Brasilia | Almeida Filho J.E.,State University of Norte Fluminense | And 11 more authors.
BMC Genomics | Year: 2017

Background: Common bean is a legume of social and nutritional importance as a food crop, cultivated worldwide especially in developing countries, accounting for an important source of income for small farmers. The availability of the complete sequences of the two common bean genomes has dramatically accelerated and has enabled new experimental strategies to be applied for genetic research. DArTseq has been widely used as a method of SNP genotyping allowing comprehensive genome coverage with genetic applications in common bean breeding programs. Results: Using this technology, 6286 SNPs (1 SNP/86.5 Kbp) were genotyped in genic (43.3%) and non-genic regions (56.7%). Genetic subdivision associated to the common bean gene pools (K=2) and related to grain types (K=3 and K=5) were reported. A total of 83% and 91% of all SNPs were polymorphic within the Andean and Mesoamerican gene pools, respectively, and 26% were able to differentiate the gene pools. Genetic diversity analysis revealed an average H E of 0.442 for the whole collection, 0.102 for Andean and 0.168 for Mesoamerican gene pools (F ST=0.747 between gene pools), 0.440 for the group of cultivars and lines, and 0.448 for the group of landrace accessions (F ST=0.002 between cultivar/line and landrace groups). The SNP effects were predicted with predominance of impact on non-coding regions (77.8%). SNPs under selection were identified within gene pools comparing landrace and cultivar/line germplasm groups (Andean: 18; Mesoamerican: 69) and between the gene pools (59 SNPs), predominantly on chromosomes 1 and 9. The LD extension estimate corrected for population structure and relatedness (r2 SV) was~88 kbp, while for the Andean gene pool was~395 kbp, and for the Mesoamerican was~130 kbp. Conclusions: For common bean, DArTseq provides an efficient and cost-effective strategy of generating SNPs for large-scale genome-wide studies. The DArTseq resulted in an operational panel of 560 polymorphic SNPs in linkage equilibrium, providing high genome coverage. This SNP set could be used in genotyping platforms with many applications, such as population genetics, phylogeny relation between common bean varieties and support to molecular breeding approaches. © 2017 The Author(s).

Silva R.V.,Federal University of Viçosa | Silva R.V.,Instituto Federal Goiano IF Goiano | de Lima Oliveira R.D.,Federal University of Viçosa | da Silva Ferreira P.,Federal University of Viçosa | And 2 more authors.
Bragantia | Year: 2015

Considering that the root-knot nematode Meloidogyne exigua has caused great yield losses to cofee production in Brazil, this study aimed to determine whether the penetration and the reproduction events of this nematode on the roots of plants from two cofee cultivars with diferent levels of basal resistance to this nematode could be afected by silicon (Si). Cofee plants from the cultivars Catuaí and IAPAR 59, which are susceptible and resistant, respectively, to M. exigua, were grown in pots containing Si-deficient soil that was amended with either calcium silicate (+Si) or calcium carbonate (–Si). The Si concentration on the root tissue significantly increased by 159 and 97% for the +Si plants from the cultivars Catuaí and IAPAR 59, respectively, compared to the –Si plants of these cultivars. The population of M. exigua, the number of galls and the number of eggs were significantly reduced on the roots of the +Si plants of the cultivars Catuaí and IAPAR 59 compared to the –Si plants of these cultivars. It was concluded that the development and reproduction events of M. exigua were negatively impacted on the roots of cofee plants supplied with Si. © 2015, Instituto Agronomico. All rights reserved.

PubMed | Laboratorio Of Biotecnologia, Federal University of Goais, Instituto Federal Goiano IF Goiano and University of Brasilia
Type: Journal Article | Journal: Molecular genetics and genomics : MGG | Year: 2016

Researchers have made great advances into the development and application of genomic approaches for common beans, creating opportunities to driving more real and applicable strategies for sustainable management of the genetic resource towards plant breeding. This work provides useful polymorphic single-nucleotide polymorphisms (SNPs) for high-throughput common bean genotyping developed by RAD (restriction site-associated DNA) sequencing. The RAD tags were generated from DNA pooled from 12 common bean genotypes, including breeding lines of different gene pools and market classes. The aligned sequences identified 23,748 putative RAD-SNPs, of which 3357 were adequate for genotyping; 1032 RAD-SNPs with the highest ADT (assay design tool) score are presented in this article. The RAD-SNPs were structurally annotated in different coding (47.00%) and non-coding (53.00%) sequence components of genes. A subset of 384 RAD-SNPs with broad genome distribution was used to genotype a diverse panel of 95 common bean germplasms and revealed a successful amplification rate of 96.6%, showing 73% of polymorphic SNPs within the Andean group and 83% in the Mesoamerican group. A slightly increased He (0.161, n=21) value was estimated for the Andean gene pool, compared to the Mesoamerican group (0.156, n=74). For the linkage disequilibrium (LD) analysis, from a group of 580 SNPs (289 RAD-SNPs and 291 BARC-SNPs) genotyped for the same set of genotypes, 70.2% were in LD, decreasing to 0.10%in the Andean group and 0.77% in the Mesoamerican group. Haplotype patterns spanning 310Mb of the genome (60%) were characterized in samples from different origins. However, the haplotype frameworks were under-represented for the Andean (7.85%) and Mesoamerican (5.55%) gene pools separately. In conclusion, RAD sequencing allowed the discovery of hundreds of useful SNPs for broad genetic analysis of common bean germplasm. From now, this approach provides an excellent panel of molecular tools for whole genome analysis, allowing integrating and better exploring the common bean breeding practices.

Rossi C.Q.,Federal Rural University of Rio de Janeiro | Pereira M.G.,Federal Rural University of Rio de Janeiro | Loss A.,Federal University of Santa Catarina | Gazolla P.R.,AGRODEFESA | And 2 more authors.
Agriculture, Ecosystems and Environment | Year: 2013

Pre-harvest sugarcane straw burning affects the dynamics of soil chemistry and δ13C and δ15N abundance, but further studies are needed to understand the long-term effects of this practice on the degradation of chemical attributes of soil and sugarcane production. The present study evaluates chemical modifications of soil and natural δ13C and δ15N abundance in sugarcane crops managed with pre-harvest straw burning for 1, 5, 10 and 20 years. For comparison purposes, soil covered with natural Cerrado vegetation and forage grass (pasture) were also evaluated. After chemical characterization of the areas studied, according to Embrapa (1997) total organic carbon (TOC), bulk density (Bd) and natural δ15N and δ13C abundance were determined in soil samples, and carbon stocks calculated from TOC values. In general, the pasture area had the highest δ13C and δ15N content, the Cerrado vegetation area had the lowest values for these elements and sugarcane crops exhibited intermediary levels. Areas subjected to sugarcane field burning for a shorter period had the highest Ca and Mg and lowest P and K content. Sugarcane crops managed with straw burning for 1 and 5 years produced lower carbon stocks in the top soil layer (0-10cm) than sugarcane crops with 10 and 20 years, pasture and Cerrado areas. The replacement of natural Cerrado vegetation by sugarcane crops changed δ13C profile, likely because sugarcane is a C4 plant, which has a specific carbon accumulation pattern. Areas cropped with sugarcane for 1, 10 and 20 years and subjected to different types of soil use after replacement of the original Cerrado vegetation had the highest δ15N values, indicating accelerated mineralization of soil organic matter. © 2013 Elsevier B.V.

Costa R.R.G.F.,State University of Goiás | Quirino G.S.F.,State University of Goiás | Naves D.C.F.,State University of Goiás | Santos C.B.,Instituto Federal Goiano IF Goiano | Rocha A.F.S.,State University of Goiás
Pesquisa Agropecuaria Tropical | Year: 2015

The misuse of fertilizers has become a growing concern in terms of agricultural and environmental sustainability. One alternative to reduce the impact of chemical fertilizers is the use of inoculants containing nitrogen-fixing and plant growth promoting bacteria. This study aimed at evaluating the effects of an inoculant with Azospirillum brasilense on the growth and yield of secondharvest maize. The experimental design was randomized blocks with three replications, in a 3 × 5 factorial scheme. The treatments consisted of three inoculation methods (control without inoculation, seed inoculation and leaf-sprayed inoculation at the V4 stage) and five cover N-fertilization doses (0%, 25%, 50%, 75% and 100%, with the 100% dose corresponding to 50 kg ha-1 of N as urea). Inoculated plants showed a greater growth for height (9.5% and 16%), stem dry biomass (49% and 6.75%) and root dry biomass (123% and 97%), respectively for seed inoculation and spraying, as well as increases in ear size (8%), chlorophyll content (4%), 1,000-grain weight (12%) and grain yield (29%), when compared to non-inoculated plants. The effects of N doses were only significant for 1,000-grain weight and grain yield (kg ha-1), with seed inoculation providing a higher yield for second-harvest maize. © 2015, Universidade Federal De Goias (UFG). All rights reserved.

Borges L.M.F.,Federal University of Goais | Duarte S.C.,Federal University of Goais | Louly C.C.B.,Instituto Federal Goiano IF Goiano
Ciencia Rural | Year: 2015

Although Rhipicephalus microplus mainly parasitizes bovines, different breeds can have variable parasite burdens, with indian breeds being less susceptible to tick infestation than european breeds. These ticks use pasture questing to seek out their hosts in the open spaces of their grassland habitats. Using an olfactometer bioassay, where the larva could express questing, the authors aimed to answer whether R. microplus exhibit different behaviors depending on the bovine breed. Sixteen larvae were individually exposed to the odors of five holstein friesian cattle, five nelore cattle, hexane (negative control) and 2-nitrophenol (positive control). The highest questing responses were observed to 2-nitrophenol and holstein odors. The lowest response was observed to the solvent and was statistically similar to nelore odors. It is possible to conclude that R. microplus express different questing behaviors depending on the odor of the breed perceived. This behavior can help R. microplus to avoid parasitizing nelore bovines and is biologically advantageous for the tick because it is known that ticks that feed on this host have impaired development. © 2015, Universidade Federal de Santa Maria. All rights reserved.

Malafaia G.,Instituto Federal Goiano IF Goiano | de Lima Rodrigues A.S.,Instituto Federal Goiano IF Goiano | de Araujo F.G.,Instituto Federal Goiano IF Goiano | Leandro W.M.,Federal University of Goais
Revista Ambiente e Agua | Year: 2015

This study evaluated the parameters of the growth of corn plants (Zea mays L.) grown in pots containing soil plus tannery sludge vermicompost and irrigated with household wastewater. The arrangement of treatments consisted of a factorial 2×6 (two types of irrigation and six fertilization treatments) in a completely randomized design (CRD) with five repetitions. The height of the plants and the diameter of the stems were evaluated bi-weekly. The results indicated that both the wastewater and the tannery sludge vermicompost are good sources of nutrients for the plants, promoting their growth. We conclude, therefore, that wastewater from households and tannery sludge vermicompost can be considered an agricultural waste of interest for the corn crop. © 2015, Institute for Environmental Research in Hydrographic Basins (IPABHi). All rights reserved.

Resende O.,Instituto Federal Goiano IF Goiano | Almeida D.P.,Instituto Federal Goiano IF Goiano | Costa L.M.,Instituto Federal Goiano IF Goiano | Mendes U.C.,Instituto Federal Goiano IF Goiano | de Fatima Sales J.,Instituto Federal Goiano IF Goiano
Ciencia e Tecnologia de Alimentos | Year: 2012

This study analyzed the drying process and the seed quality of adzuki beans (Vigna angularis). Grains of adzuki beans, with moisture content of 1.14 (decimal dry basis) at harvest and dried until the moisture content of 0.11 (decimal dry basis.) were used. Drying was done in an experimental drier maintened at controlled temperatures of 30, 40, 50, 60, and 70 °C and relative humidity of 52.0, 28.0, 19.1, 13.1, and 6.8%, respectively. Physiological and technological seed quality was evaluated using the germination test, Index of Germination Velocity (IGV), electrical conductivity, and water absorption, respectively. Under the conditions tested in the present study, it can be concluded that drying time for adzuki beans decreases with the higher air temperatures of 60 and 70 °C, and it affected the physiological and technological seed quality. Thus, to avoid compromising adzuki seeds quality, it is recommended to promote its drying up to 50 °C.

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