Research Report

Related GMR Articles

04/07/2016
Allelochemical; Plant breeding; Resistance to pests; Solanum lycopersicum; Solanum pennellii

The wild tomato, Solanum pennellii, is an important source of resistance genes against tomato pests. This resistance is due to the presence of acyl sugars (AS), which are allelochemicals that have negative effects on arthropod pests. There are no commercially available tomato cultivars that exhibit significant levels of resistance to arthropod pests. Therefore, this study ... more

D.M. Dias; J.T.V. Resende; J.C. Marodin; R. Matos; I.F. Lustosa; N.C.V. Resende; D.M. Dias; J.T.V. Resende; J.C. Marodin; R. Matos; I.F. Lustosa; N.C.V. Resende; D.M. Dias; J.T.V. Resende; J.C. Marodin; R. Matos; I.F. Lustosa; N.C.V. Resende
3/22/2017
Animals; Crosses, Genetic; Disease resistance; Genotype; Hemiptera; Pest Control, Biological; Pheromones; Plant breeding; Plant Diseases; Solanum lycopersicum; 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
4/13/2017
Fruit; Genetic variation; Genotype; Plant breeding; Quantitative Trait, Heritable; Solanum lycopersicum

The tomato is the second most produced vegetable in the world, with significant participation in the human diet. In addition, the production of tomatoes generates jobs and family income. The availability of improved cultivars that provide greater profitability to the producer and satisfactorily meets the needs of the fresh fruit market and the processing industry becomes imperative due to its ... more

J.V.M. Peixoto; deM.S. Neto; L.F.C. Campos; deS. Dourado; A.P.O. Nogueira; D.R. Nascimento
03/02/2010
Genetic gains; Intrapopulation selection; Selection indexes; Zea mays

We estimated genetic gains for popcorn varieties using selection indexes in a fourth cycle of intrapopulation recurrent selection developed in the campus of the Universidade Estadual do Norte Fluminense. Two hundred full-sib families were obtained from the popcorn population UNB-2U of the third recurrent selection cycle. The progenies were evaluated in a randomized block design with two ... more

A.T.Amaral Júnior; S.P.Freitas Júnior; R.M. Rangel; G.F. Pena; R.M. Ribeiro; R.C. Morais; A.R. Schuelter
09/22/2015
Cytogenetics; Meiosis; Plant breeding; Pollen viability; X Triticosecale Wittmack

Triticale (X Triticosecale Wittmack) is an intergeneric hybrid derived from a cross between wheat and rye. As a newly created allopolyploid, the plant shows instabilities during the meiotic process, which may result in the loss of fertility. This genomic instability has hindered the success of triticale-breeding programs. Therefore, strategies should be developed to obtain stable ... more

R.M. Giacomin; R. Assis; S.P. Brammer; N. Junior; P.R. Da-Silva
09/08/2015
Agronomic trait; Hybrid; Mungbean; Physiological trait; Plant breeding

Heterotic effects of mungbean hybrids from 25 crosses between parents differing in 9 agronomic and physiological traits were evaluated for various selected traits and seed yield. Significant heteroses were observed in most selected traits, except for the number of seeds per plant. When the heterosis of seed yield was evaluated in these hybrids, significant heterosis was found in 9 crosses, ... more

P.A. Tantasawat; P. Khajudparn; T. Prajongjai; O. Poolsawat
12/28/2015
Bayesian models; Epistasis; Heterosis; Plant breeding

The prediction of single-cross hybrids in maize is a promising technique for optimizing the use of financial resources in a breeding program. This study aimed to evaluate Genomic Best Linear Unbiased Predictors models for hybrid prediction and compare them with the Bayesian Ridge Regression, Bayes A, Bayesian LASSO, Bayes C, Bayes B, and Reproducing Kernel Hilbert Spaces Regression ... more

J.P.R. Santos; H.D. Pereira; R.G. Von Pinho; L.P.M. Pires; R.B. Camargos; M. Balestre
11/30/2015
interspecific hybrid; Modified location model; Multivariate analysis; Plant breeding

The Ward-MLM procedure was used to evaluate genetic variation in four backcross progenies and in their parents, hybrid F1 HD13 and donor parent Passiflora sublanceolata. Sixteen quantitative descriptors and five qualitative characteristics of relevance to ornamental flower production were assessed. Using the pseudo-F and pseudo-T² criteria, we identified four groups among these plants ... more

C.A.F. Melo; M.M. Souza; A.G.R. Sousa; A.P. Viana; E.A. Santos
10/19/2015
Abiotic stress; Drought tolerance; Plant breeding; Sorghum bicolor

Sorghum grain yield can be significantly affected by climatic changes, especially drought and high temperature. The purpose of this study was to evaluate hybrids of grain sorghum grown under normal irrigation conditions or water stress in order to select those likely to be more tolerant of drought. Forty-nine hybrids were grown in a randomized block design experiment, with three ... more

C.B. Menezes; D.C. Saldanha; C.V. Santos; L.C. Andrade; M.P.Mingote Júlio; A.F. Portugal; F.D. Tardin
03/31/2016
Correlations between traits; Genetic divergence; Multivariate analysis; Plant breeding

The aim of this study was to use multivariate methods and Pearson and partial correlations to disregard phenotypic characteristics that contribute little to differentiation between Brachiaria ruziziensis genotypes. Eighty-one genotypes of B. ruziziensis were assessed in completely randomized blocks with three replications. Ten phenotypic characteristics were assessed: ... more

B.A. Rezende; C.B. Ribeiro; D.H.L. Teixeira; F.M.A. Gonçalves; S. Sobrinho; B.A. Rezende; C.B. Ribeiro; D.H.L. Teixeira; F.M.A. Gonçalves; S. Sobrinho; B.A. Rezende; C.B. Ribeiro; D.H.L. Teixeira; F.M.A. Gonçalves; S. Sobrinho

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