Research Article

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2/08/2017
Animals; Bayes Theorem; Brazil; Evolution, Molecular; Fishes; Genetic variation; Genetics, Population; Microsatellite Repeats

Genetic variability is one of the important criteria for species conservation decisions. This study aimed to analyze the genetic diversity and the population differentiation of two natural populations of Arapaima gigas, a species with a long history of being commercially exploited. We collected 87 samples of A. gigas from Grande Curuai Lake and Paru Lake, located in the Lower Amazon region of ... more

P.F. Fazzi-Gomes; N. Melo; G. Palheta; S. Guerreiro; M. Amador; A.K. Ribeiro-Dos-Santos; S. Santos; I. Hamoy
09/21/2017
Animals; Biomarkers, Tumor; Conserved sequence; Helminth Proteins; Protein Binding; Protein domains; Protein stability; Sequence Homology; Tumor Protein, Translationally-Controlled 1; Tylenchoidea

Plant parasitic nematodes infect a wide range of hosts representing the largest source of biotic stress experienced by plants. Meloidogyne genus comprises the most important parasitic nematodes, also known as root-knot nematodes. These parasitic organisms obtain nutrients to support their development through complex interactions with their hosts. The translationally-controlled tumor protein ( ... more

R.M.Moraes Filho; A.F. Menezes; L.S.S. Martins
12/23/2016
Animals; Cloning, Molecular; Disease resistance; Flavonoids; Gene Expression Regulation, Enzymologic; Gene Expression Regulation, Plant; Genes, Plant; Insecta; Metabolic Networks and Pathways; Pinus; Plant Diseases

Pinus massoniana Lamb. is an important timber and turpentine-producing tree species in China. Dendrolimus punctatus and Dasychira axutha are leaf-eating pests that have harmful effects on P. massoniana production. Few studies have focused on the molecular mechanisms underlying pest resistance in P. massoniana. Based on sequencing analysis of the transcriptomes of insect-resistant P. massoniana ... more

Z.Q. Yang; H. Chen; J.H. Tan; H.L. Xu; J. Jia; Y.H. Feng
2/23/2017
Ascomycota; Brazil; Carica; Crops, Agricultural; Disease resistance; Fruit; Genotype; Hybrid Vigor; Hybridization, Genetic; Inbreeding; Plant breeding; Plant Diseases; Plant Leaves; Reproducibility of Results

Papaya crop is important to Brazilian agribusiness. However, the expansion of papaya cultivation in the country is affected by the absence of commercial cultivars presenting good disease resistance. The black-spot caused by the fungus Asperisporium caricae is the most damaging foliar disease affecting Brazilian papaya crops. The use of genetically resistant cultivars is a promising strategy to ... more

T.P.S. Poltronieri; S.F. Silveira; M. Vivas; S. Catarina; D.F.M. Cortes; A.O.N. Azevedo; M.G. Pereira
09/27/2017
Disease resistance; Genotype; Helminthosporium; Hybridization, Genetic; Plant Diseases; Selective breeding; Zea mays

The present study was conducted to investigate the genetic control and to estimate the general and specific combining abilities of popcorn for agronomic attributes and attributes related to resistance to northern leaf blight (NLB). The 56 hybrids (F and reciprocals), together with the eight parent lines and six controls, were evaluated in two harvests, in a randomized-block design with four ... more

J.S. Santos; A.T.Amaral Júnior; M. Vivas; G.S. Mafra; G.F. Pena; F.H.L. Silva; A.G. Guimarães
09/27/2017
Ascomycota; Capsicum; Disease resistance; Fruit; Genotype; Models, Genetic; Plant breeding; Plant Diseases; Plant Leaves; Potyvirus; Quantitative Trait, Heritable; Selective breeding; Xanthomonas

This study aimed to identify Capsicum genotypes with resistance to bacterial spot (BS), anthracnose and Pepper yellow mosaic virus (PepYMV). Fifty-four genotypes of Capsicum spp were evaluated. Resistance reaction against BS was evaluated using three replicates, testing hypersensitivity and quantitative resistance in leaves. After evaluation, inoculated leaves were detached from the plants, ... more

C.S. Bento; A.G. de Souza; C.P. Sudré; S. Pimenta; R. Rodrigues
09/27/2017
Alleles; Ascomycota; Basidiomycota; Disease resistance; Genotype; Hybridization, Genetic; Plant breeding; Plant Diseases; Selective breeding; Vigna

This study aimed at identifying and selecting through partial diallel analysis, segregating populations of cowpea resistant to Macrophomina phaseolina and Thanatephorus cucumeris, based on the evaluation of general (GCA) and specific combining ability (SCA), involved in the genetic control of resistance. For this reason, 19 grouped cowpea genotypes, considering the resistance to these ... more

L.R.L. Lima; K.J. Damasceno-Silva; M.A. Noronha; D.A. Schurt; M.M. Rocha
12/23/2016
Annona; Bayes Theorem; Brazil; cluster analysis; Genetic variation; Genetics, Population; Genotype; Microsatellite Repeats

Habitat fragmentation has numerous consequences, particularly to endemic species, and has a negative impact on the genetic diversity of neglected species, leading to genetic drift. Annona crassiflora Mart. is a species that is endemic to Brazil, and its incidence in the Cerrado biome has decreased. The identification and characterization of its remaining diversity is necessary for its ... more

R. Gwinner; T.A. Setotaw; F.A. Rodrigues; D.V.C. França; F.A. da Silveira; L.A.S. Pio; M. Pasqual
2/08/2017
Brazil; Breeding; Crosses, Genetic; Fusarium; Genetic variation; Genotype; Multivariate analysis; Plant Diseases; Tracheophyta

The multivariate analyses are useful tools to estimate the genetic variability between accessions. In the breeding programs, the Ward-Modified Location Model (MLM) multivariate method has been a powerful strategy to quantify variability using quantitative and qualitative variables simultaneously. The present study was proposed in view of the dearth of information about popcorn breeding ... more

R.N.F. Kurosawa; A.T. do Amara Junior; F.H.L. Silva; D. Santos; M. Vivas; S.H. Kamphorst; G.F. Pena
2/16/2017
Animals; Calcium-Binding Proteins; Calpain; Cattle; Gene frequency; Genetic markers; Genotype; Polymorphism, Single Nucleotide; Quantitative trait loci; Red Meat

The objectives of this study were to characterize the allelic and genotypic frequencies of polymorphisms in the µ-calpain and calpastatin genes, and to assess their association with meat tenderness and animal growth in Nellore cattle. We evaluated 605 Nellore animals at 24 months of age, on average, at slaughter. The polymorphisms were determined for the molecular markers CAPN316, CAPN530, ... more

M.E. Carvalho; J.P. Eler; M.N. Bonin; F.M. Rezende; F.H. Biase; F.V. Meirelles; L.C.A. Regitano; L.L. Coutinho; J.C.C. Balieiro; J.B.S. Ferraz

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