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
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
11/21/2016
Coffea arabica; Genetic divergence; Multivariate analysis; Plant breeding

In a coffee plantation of a coffee ‘Acaiá’ cultivar (Coffea arabica), on the Midwest of Minas Gerais in Capitólio city, a different kind of coffee tree was found (1989), possibly due to a mutation. It presented larger leaves and grains than those of conventional coffee trees and was named as “Big Coffee VL.” The aim of this study was to estimate the ... more

J.A. Silva; S.P. Carvalho; A.T. Bruzi; R.J. Guimarães; L.L. Oliveira; L.C. Simões; J.A. Silva; S.P. Carvalho; A.T. Bruzi; R.J. Guimarães; L.L. Oliveira; L.C. Simões
11/21/2016
Genetic variability; Host resistance and pathogen aggression; Incubation environments; Inoculation; Plant breeding; White mold

Sclerotinia sclerotiorum is an important soybean pathogen. The objectives of this study were to evaluate levels of resistance of soybean genotypes to the fungus, and to determine the effects of different incubation environments on host resistance and pathogen aggressiveness. Two experiments were conducted using 103 genotypes from the seed collection of ... more

L.H.S. Castro; A.A. Figueiró; A.P.O. Nogueira; S.J. Clough; F.C. Juliatti; L.H.S. Castro; A.A. Figueiró; A.P.O. Nogueira; S.J. Clough; F.C. Juliatti

Pages