Research Article

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2017 Apr 13
Animals; Cucumis; Disease resistance; Genetic variation; Plant Roots; seeds; Tylenchoidea

Root-knot nematodes (Meloidogyne spp) are destructive agricultural pests that reduce the productivity of cultivated vegetables worldwide, especially when vegetables are cropped continuously in greenhouses. Cucumbers (Cucumis sativus L.), in particular, suffer extensive damage due to root-knot nematodes, and only a few wild species are known to be resistant. Grafting of cultivated plants to ... more

X.Z. Li; S.X. Chen
2017 Mar 16
Animals; Base Sequence; Conserved sequence; Disease resistance; Evolution, Molecular; Genetic markers; Genetic variation; Genotype; Microsatellite Repeats; Phylogeny; Plant Diseases; Plant Proteins; Psidium; Tylenchoidea

Guava (Psidium guajava L.) crop is severely affected by the nematode Meloidogyne enterolobii. Native Psidium species have been reported as sources of resistance against this nematode. Knowledge on the molecular relationship between Psidium species based on plant resistance gene analogs (RGA) can be useful in the genetic breeding of guava for resistance to M. enterolobii. In this study, RGA ... more

L.R. Noia; A.C. Tuler; A. Ferreira; M.F.S. Ferreira
2017 Mar 22
Animals; Crosses, Genetic; Disease resistance; Genotype; Hemiptera; Lycopersicon esculentum; Pest Control, Biological; Pheromones; Plant breeding; Plant Diseases; Tetranychidae

The mini tomato production has expanded, becoming an amazing alternative for enterprise. Despite all commercial potential, the cultivation has the occurrence of pests as main obstacle during the crop development. Nowadays, there are no researches that aimed obtaining genotypes with high acylsugar content, capable of providing a broad-spectrum resistance to pests. This study aimed the selection ... more

G.M. Maciel; R.S. Almeida; J.P.R. da Rocha; V. Andaló; G.R. Marquez; N.C. Santos; R.R. Finzi
2017 Mar 22
Biofortification; Brazil; cluster analysis; Genetic variation; Genotype; Minerals; Nutritive Value; Phaseolus; Phenotype; Plant breeding; seeds

The development of common bean cultivars with high technological quality that are biofortified with minerals, is required to meet the demand for food with health benefits. The objectives of this study were to evaluate whether common bean genotypes differ in terms of technological and mineral biofortification traits, to study the correlations between these characters, to analyze the genetic ... more

deM. Steckling; N.D. Ribeiro; F.D. Arns; H.C. Mezzomo; M.T.D.F. Possobom
2017 Mar 30
Agriculture; Brazil; cluster analysis; Crop Production; Edible Grain; Genetic Drift; Genetic variation; Genotype; Phaseolus; Phenotype; seeds

Evaluating genetic diversity among genotypes is important for providing parameters for the identification of superior genotypes, because the choice of parents that form segregating populations is crucial. Our objectives were to i) evaluate agronomic performance; ii) compare clustering methods; iii) ascertain the relative contributions of the variables evaluated; and iv) identify the most ... more

F.A. da Silva; A.M. Corrêa; P.E. Teodoro; K.V. Lopes; C.C.G. Corrêa
2016 Dec 23
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
2017 Feb 08
cluster analysis; Disease resistance; Genetic variation; Genotype; Gossypium; Phenotype; Plant Diseases; Quantitative Trait, Heritable

In Pakistan, cotton crop has been under enormous threat of cotton leaf curl disease (CLCuD) over the last four decades. In order to estimate genetic diversity in cotton germplasm CLCuD resistance, we assessed 100 cotton genotypes for their CLCuD resistance/tolerance and other related agronomical traits. Various statistical analytical tools, including correlation analysis, cluster analysis, and ... more

M. Javed; S.B. Hussain; M. Baber
2017 Feb 23
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
2017 Sep 27
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
2017 Sep 27
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

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