Agronomic Performance and Multivariate Analysis Applied to Three-Waycross Maize Hybrids

Rosa, Tiago Corazza da; Carvalho, Ivan Ricardo; Szareski, Vinícius Jardel; Pelegrin, Alan Junior de; Barbosa, Mauricio Horbach; Santos, N. L. dos; Martins, Tamires da Silva; Uliana, Adriel Somavilla; Souza, Velci Queiróz de

doi:10.5539/jas.v10n5p319

Cited by 5 publications

(5 citation statements)

References 15 publications

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“…From the obtained correlations, greater relevance is directed towards associations with grain yield, as it is the main characteristic desired in breeding programs [8,31,40]. The results indicate that the direct selection of the SD, ME, TGM and M100G characteristics for breeding purposes can induce indirect genetic gains in corn productivity.…”

Section: Resultsmentioning

confidence: 96%

“…The relationship between genotype and environment is what determines the phenotypic phenomenon of the plant, and it is accepted that thousands of genes are involved in its life cycle to adjust each physical characteristic and its interrelationships [42]. However, the interest in evaluating the relative contribution between the characteristics resides in the possibility of selecting characters that most contribute to the expression of the genotype in breeding programs, reducing work, time and money spent on experimentation [40].…”

Section: Fig 2 Analysis Of Main Components Of the Characteristics And Varieties Of Creole Maizementioning

confidence: 99%

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Variability, Association and Selection of Promising Characters for Breeding Creole Maize

Fontinele

Santos

Nascimento

et al. 2021

JEAI

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Genetic variability is the main characteristic when seeking to select promising genotypes for plant breeding. Thus, the objective of this work was to investigate the genetic variability in agronomic and morphological characteristics of traditional varieties of maize, in addition to determining the degree of association and the selection of variety and promising characters to be explored in programs of genetic breeding of Creole maize. The experiment was conducted at the Federal University of Acre (UFAC), Rio Branco - Acre, in the 2017/2018 harvest period. A randomized block design was used, with five replications. The treatments were four varieties of Creole maize (V1, V2, V3 and V4) from the Vale do Juruá region and another hybrid cultivar LG 3040 (HI). The morpho-agronomic characteristics were evaluated in the useful area of the plots: days to silking (DS), days to anthesis (DA), plant height (PH) and height ear insertion (HEI), stem diameter (SD), mass of ear (ME), length ear (LE), diameter ear (DE), total grain mass (TGM), mass of 100 grain (M100G), grain moisture (GM) and grain productivity (GP). The data were subjected to analysis of variance and comparison of means. The values of genotypic and phenotypic variance were also estimated, heritability in the broad sense, selection accuracy, phenotypic, genotypic and environmental correlation, in addition to the principal component analysis (PCA). Variations in characteristics were found between the varieties of Creole maize and their interrelations, showing greater influence of ME, PH, TGM, M100G, DE and GP in the expression of the phenotype. Therefore, it is concluded that there is genetic variability in the characteristics evaluated, with emphasis to V4 that showed superior performance allowing direct selection of the characteristics SD, ME, TGM and M100G to be incorporated into an breeding program.

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Section: Resultsmentioning

confidence: 96%

Section: Fig 2 Analysis Of Main Components Of the Characteristics And Varieties Of Creole Maizementioning

confidence: 99%

Variability, Association and Selection of Promising Characters for Breeding Creole Maize

Fontinele

Santos

Nascimento

et al. 2021

JEAI

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“…reproductive structure, where beneficiate the dimensions of ears and seeds Rosa et al, 2018). and tassel removal plus leaf removal where, for some inbreds the best result was obtained when preserving more leaves (Hunter et al, 1973).…”

Section: Genetics and Molecular Research 18mentioning

confidence: 99%

Research Article The effects of different mechanical detasseling methods on hybrid maize seed production

Costa¹,

Carvalho²,

Ferreira³

et al. 2019

Genet. Mol. Res.

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We evaluated the efficiency of three mechanical detasseling methods on the production of hybrid maize seeds. The experiment was run in the crop season of 2016/2017 in Indianópolis, MG, Brazil. The design used was random blocks, where the treatments corresponded to three detasseling methods: Puller (PUL)based on only one mechanical detasseling operation, Cutter 2x + Puller (C1P)-based on two mechanical detasseling operations by the Cutter method and one operation by the Puller method, and Cutter + Puller (C2P)-based on only one operation by the Cutter method and one operation by Puller. There was variability in the effects and efficiency of the mechanical detasseling methods in the production of hybrid maize seeds. The two methods C1P and C2P had small differences; both being superior to PUL. The mechanical detasseling method based on one operation of Cutter and one operation by Puller method is recommended, since it minimizes costs, lowering transfer and genetic contamination as well, and it optimizes the production of hybrid maize seeds per plant and unit area.

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“…However, single cross hybrid seeds have elevated costs, hindering the access of farmers with lower technological level (Doná et al, 2011;Demari et al, 2018). Thus, triple, double, and intervarietal hybrids are important alternatives to farmers, once they may present higher phenotypic stability in unfavorable scenarios (Da Rosa et al, 2018). Understanding of agronomic behavior and associations among traits are crucial to maize breeding, evidencing which genotypes and traits are determinant for the grain yield.…”

Section: Introductionmentioning

confidence: 99%

Path analysis and canonical variables of intervarietal maize hybrids

et al. 2019

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Maize (Zea mays L.) is the cereal most produced in the world, due to its wide scope and utilization in human and animal diet. This study aims to evaluate the agronomic performance of intervarietal maize hybrids, as well as the linear associations, interrelations of cause and effect, and the genotypes dispersion through canonical variates. The experiment was conducted in the agricultural year of 2014/2015. The crosses that originated the hybrids were carried out on the growing season of 2013/2014 and hybrids evaluated on 2014/2015. The hybrids were arranged in randomized blocks, being 13 treatments with five repetitions. The measured characters were: plant height, spike insertion height, stem diameter, spike diameter, spike length, spike mass, number of rows of grains per spike, number of grains per row, cob diameter, cob mass, spike grains mass, mass of a thousand grains, grain length and grain yield. The data were submitted to analysis of variance and mean values compared by the Tukey test at 5% of probability. The Pearson’s linear correlation analysis and path analysis were performed using grain yield as a dependent character. Furthermore, the analysis of canonical variables was carried out. The hybrid H5: G3 X G4 revealed higher grain yield, spike grains mass, number of grains per row and spike diameter. Grain yield of intervarietal hybrids presented positive correlations with the traits such as stem diameter, spike diameter, spike length, number of grains per row, mass of a thousand grains, grain length and spike grains mass. Spike diameter and spike length presented higher direct effects on grain yield of intervarietal hybrids. The canonical variates revealed the formation of five phenotypically distinct groups of intervarietal hybrids.

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Agronomic Performance and Multivariate Analysis Applied to Three-Waycross Maize Hybrids

Cited by 5 publications

References 15 publications

Variability, Association and Selection of Promising Characters for Breeding Creole Maize

Variability, Association and Selection of Promising Characters for Breeding Creole Maize

Research Article The effects of different mechanical detasseling methods on hybrid maize seed production

Path analysis and canonical variables of intervarietal maize hybrids

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