Research Article

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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
Diallel; Heterosis; Nicotiana tabacum; Plant breeding

The species Nicotiana tabacum, known as tobacco, is one of the crops with the highest economic value in the world among non-food species. Since 2000, Brazil has become the world’s second largest tobacco producer. Brazilian production is mainly concentrated in the South region. The main tobacco types are produced in Brazil, such as Dark, which, despite ... more

A. Pscheidt; R.C. Lemos; J.C. Souza; V.B. Oliveira; A.M. Souza; J.M.V. Pádua
Dominance deviations; Epistasis; Generalized linear mixed model; Phaseolus vulgaris; Quantitative genetics

Knowledge of the genetic structure of a trait shapes the entire strategy of a breeding program. In this study, the purpose was to determine the additive and non-additive effects that affect the genetic control of common bean roots. A field experiment, with 75 treatments in a partially balanced incomplete block design, was carried out in the 2018/19 growing season. ... more

R.C. de Melo; P.H. Cerutti; F.A.C. Nardello; A.F. Guidolin; J.G.C. da Silva; J.L.M. Coimbra
Artificial Intelligence; Dominance; Epistasis; Prediction; Subset selection

The study of complex traits using large databases of molecular markers has reshaped genetic breeding programs as it allows the direct incorporation of information from a large number of molecular markers for the prediction of genomic values. However, the large number of markers can lead to problems of computational demand, multicollinearity, and dimensionality. We ... more

G.N. Silva; I.C. Sant’Anna; C.D. Cruz; M. Nascimento; C.F. Azevedo; L.S. Glória
Analytical factorial model; Bayesian AMMI models; Bayesian models; Genotype-by-environment interaction

Efficient analysis of datasets from multi-environment trials (MET) is of paramount importance in plant breeding programs. Several methods have been proposed for this purpose, each of them having advantages and disadvantages, depending on the objectives of the study. We examined the robustness in the predictive power of models that have been widely used in the study ... more

R.F. Romão; J.J. Nuvunga; C.P. Silva; L.A. Oliveira; C.T.E. Mendes; M. Balestre
AFLP; Argopecten; Heterosis; Hybrid; SSR

Argopecten purpuratus and Argopecten irradians irradi­ans hybridization was successfully performed and the hybrid offspring displayed apparent heterosis in growth traits. To better understand the genetic basis of heterosis, the genomic composition and genetic varia­tion of the hybrids were analyzed with amplified fragment length poly­morphism (AFLP) and simple sequence repeat (SSR) ... more

L.P. Hu; X.T. Huang; Y. Sun; J.X. Mao; S. Wang; C.D. Wang; Z.M. Bao
Differentially expressed gene; Grain filling stage; Heterosis; Hybrid millet

Heterosis has been widely used in crop breeding and production. However, a shortage of genes known to function in heterosis significantly limits our understanding of the molecular basis underlying heterosis. Here, we report 740 differentially expressed genes (DEGs) in the leaves of the hybrid millet Zhang No.5 and its parents at the grain filling stage determined using Solexa Illumina ... more

Z.H. Liu; H.M. Zhang; G.L. Li; Y.M. Zhang; H.C. Li; X.L. Guo
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
Genetic diversity; Heterosis; Pre-breeding; Solanum lycopersicum

Heterosis is a highly relevant phenomenon in plant breeding. This condition is usually established in hybrids derived from crosses of highly divergent parents. The success of a breeder in obtaining heterosis is directly related to the correct identification of genetically contrasting parents. Currently, the diallel cross is the most commonly used methodology to detect contrasting parents ... more

A.S.T. Figueiredo; J.T.V. Resende; M.V. Faria; P.R. Da-Silva; B.S. Fagundes; R.G.F. Morales; A.S.T. Figueiredo; J.T.V. Resende; M.V. Faria; P.R. Da-Silva; B.S. Fagundes; R.G.F. Morales
DNA movement; Graft; Heterosis; Hybrid Vigor; Polyploidy; Tallus

Periclinal chimera are made constituted of two genotypes growing side by side. One of these genotypes makes up the epidermis, the second forms the internal tissues. As a nonconventional method to improve cassava, it brought its productivity to an extraordinary level that has never been reported before. In previous experiments the chimera were synthesized by hormone ... more

N.M.A. Nassar; P.M. Gakpetor