Research Article

Related GMR Articles

08/19/2015
Genetic diversity; Random amplification of polymorphic DNA; Zea mays

In this study, we analyzed dominant molecular markers to estimate the genetic divergence of 26 popcorn genotypes and evaluate whether using various dissimilarity coefficients with these dominant markers influences the results of cluster analysis. Fifteen random amplification of polymorphic DNA primers produced 157 amplified fragments, of which 65 were monomorphic and 92 were polymorphic. To ... more

F.S. Resh; C.A. Scapim; C.A. Mangolin; M.F.P.S. Machado; A.Tdo Amaral; H.C.C. Ramos; M. Vivas
07/03/2015
EST-SSR markers; Genetic diversity; Reciprocal recurrent selection; Zea mays

This study aimed to improve grain yield in the full-sib reciprocal recurrent selection program of maize from the North Flumi­nense State University. In the current phase of the program, the goal is to maintain, or even increase, the genetic variability within and among populations, in order to increase heterosis of the 13th cycle of reciprocal recurrent selection. Microsatellite ... more

K.S.C. Galvão; H.C.C. Ramos; P.H.A.D. Santos; G.C. Entringer; J.C.F. Vettorazzi; M.G. Pereira
12/16/2015
Cytokinin/auxin; Endogenous hormones; Opposite phyllotaxy ratio; Phyllotaxy; Temperature; Zea mays

Newly identified maize (Zea mays) mutants with opposite leaf phyllotaxy are important in the study of the maize crop. Previous studies have revealed the developmental mechanism of opposite phyllotaxy on the physiological, cellular, and molecular levels. However, there have been few reports regarding the effects of changes in endogenous hormone levels in maize leaf primordia under ... more

H. Ye; G.M. Han; Q. Ma; Y.Q. Tan; H.Y. Jiang; S.W. Zhu; B.J. Cheng
11/30/2015
cDNA-AFLP; Heterosis; Non-additive gene expression; Transcriptome level; Zea mays

Heterosis has greatly contributed to conventional plant breeding and is widely used to increase crop plant productivity. However, although some studies have explored the mechanisms of heterosis at the genomic and transcriptome level, these mechanisms still remain unclear. The growth and development of maize seedlings and immature embryos have an important impact on subsequent production. ... more

H.S. Nie; S.P. Li; X.H. Shan; Y. Wu; S.Z. Su; H.K. Liu; J.Y. Han; Y.P. Yuan
04/26/2016
Grain yield; Multi-trait selection; Popping expansion; Zea mays

One of the major difficulties faced by popcorn breeders is the negative correlation between popping expansion (PE) and grain yield (GY). It is necessary to overcome this difficulty to obtain promising genotypes. One helpful tool in this process is a selection index because it allows multiple features of interest to be selected. Thus, the present study proposes a new and comprehensive ... more

R.A. Vieira; R. Rocha; C.A. Scapim; A.T.Amaral Júnior; M. Vivas; R.A. Vieira; R. Rocha; C.A. Scapim; A.T.Amaral Júnior; M. Vivas; R.A. Vieira; R. Rocha; C.A. Scapim; A.T.Amaral Júnior; M. Vivas
09/23/2016
Agronomic traits; Heterosis; Zea mays

Currently, one of the acclaimed alternatives for increasing maize yield is accomplished through utilization of heterosis in hybrid cultivars. However, upon performing crosses between related pairs, there are losses due to inbreeding depression. Thus, the aim of this study was to estimate inbreeding depression and the contribution of loci in heterozygosity in different types of maize ... more

F.B.S. Botelho; A.T. Bruzi; I.P. Lima; C.S. Rodrigues; R.Tde C. Botelho; F.B.S. Botelho; A.T. Bruzi; I.P. Lima; C.S. Rodrigues; R.Tde C. Botelho
08/12/2016
Heat shock; Late embryogenesis; Protein abundance; Zea mays

Low water availability is one of the factors that limit agricultural crop development, and hence the development of genotypes with increased water stress tolerance is a challenge in plant breeding programs. Heat-resistant proteins have been widely studied, and are reported to participate in various developmental processes and to accumulate in response to stress. This study aimed to ... more

V.M. Abreu; I.C.Silva Neta; E.V.R. Von Pinho; G.M.F. Naves; R.M. Guimarães; H.O. Santos; R.G. Von Pinho; V.M. Abreu; I.C.Silva Neta; E.V.R. Von Pinho; G.M.F. Naves; R.M. Guimarães; H.O. Santos; R.G. Von Pinho
2016 Dec 02
Crosses, Genetic; Genotype; Phenotype; Quantitative trait loci; Zea mays

The successful development of hybrid cultivars depends on the reliability of estimated combining ability of the parent lines. The objectives of this study were to assess the combining ability of partially inbred S families of popcorn derived from the open-pollinated variety UENF 14, via top-crosses with four testers, and to compare the testers for their ability to discriminate the S progenies ... more

V.J. de Lima; A.T. do Amara Junior; S.H. Kamphorst; G.F. Pena; J.T. Leite; K.F.M. Schmitt; C. Vittorazzi; J.E. de Almei Filho; F. Mora
2016 Dec 19
Plant breeding; Quantitative trait loci; Quantitative Trait, Heritable; Selection, Genetic; Zea mays

A challenge faced by popcorn breeding programs is the existence of a negative correlation between the two main traits, popping expansion and yield, which hinders simultaneous gains. The objective of this study was to investigate the use of a new variable or super trait, which favors the reliable selection of superior progenies. The super trait 'expanded popcorn volume per hectare' was ... more

A.T. do Amara Junior; D. Santos; I.F.S. Gerhardt; R.N.F. Kurosawa; N.F. Moreira; M.G. Pereira; deA. Gravina; F.H. de L. Silva
2016 Dec 19
cluster analysis; Cold Temperature; DNA, Plant; Genetic markers; Microsatellite Repeats; Polymorphism, Genetic; Stress, Physiological; Zea mays

In this study, eight inbred maize lines with high or low tolerance to cold temperature were investigated using bulk segregant analysis (BSA). Genetic diversity and genetic relationships were investigated using 100 simple sequence repeat (SSR) markers linked to cold tolerance in maize. A total of 319 alleles were identified. Among these, 128 were high coldtolerant-specific alleles and 61 were ... more

M.Q.U. Farooqi; K.J. Sa; T.K. Hong; J.K. Lee

Pages