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A. Santos

Publications of : A. Santos
Plant Genetics   Research Article

Intraspecific variability of popcorn S7 lines for phosphorus efficiency in the soil

The expansion of agriculture, coupled with the need for sustainable cropping, is one of the greatest challenges of the scientific community working on the generation of new cultivars adapted to abiotic stress conditions. The aim of this study was to evaluate the variability of popcorn lines as to responsiveness and efficiency in phosphorus use, as a first step towar.. Read More»

Genet. Mol. Res. 16(3):

Human Genetics   Research Article

Inducing autotetraploids in cassava using oryzalin and colchicine and their in vitro morphophysiological effects

    M. de J. da S. de Carvalho, V.B. Gomes, A. da S. Souza, F.F. Aud, J.A. Santos-Serejo and E.J. Oliveira

Polyploid induction has been used for plant breeding to produce bigger and more robust plants than diploid types. The present study aimed to develop a methodology for in vitro induction of polyploidy in cassava. Apical and lateral microcuttings from the BRS Formosa variety were treated with six oryzalin concentrations for 24 and 48 h. The same methodology was used for colchicine with different .. Read More»

Genet. Mol. Res. 15(2): gmr.15028281

DOI: 10.4238/gmr.15028281

Animal Genetics   Research Article

Comparison of random regression models to estimate genetic parameters for milk production in Guzerat (Bos indicus) cows

    D.J.A. Santos M.G.C.D. Peixoto R.R. Aspilcueta Borquis R.S. Verneque J.C.C. Panetto H. Tonhati

Random regression models have been widely used to estimate genetic parameters that influence milk production in Bos taurus breeds, and more recently in B. indicus breeds. With the aim of finding appropriate random regression model to analyze milk yield, different parametric functions were compared, applied to 20,524 test-day milk yield records of 2816 first-lactation Guzerat (B. indicus) cows i.. Read More»

Genet. Mol. Res. 12(1): 2013.January.24.6

DOI: 10.4238/2013.January.24.6

Human Genetics   Research Article

MTHFR C677T and A1298C polymorphisms as predictors of radiotherapy response in head and neck squamous cell

    Q.S. Anders, E. Stur, L.P. Agostini, F.M. Garcia, R.S. Reis, J.A. Santos, S.O. Mendes, L.L. Maia, G.T. Peterle, V. Stange, M.B. Carvalho, E.H. Tajara, M. Santos, A.M.A. Silva-Conforti and I.D. Louro

The C677T and A1298C polymorphisms in methylenetetrahydrofolate reductase (MTHFR), which regulates the release of active folate in the body, may have reduced activity. Given that folate participates in important intracellular pathways, such as nucleotide synthesis and biomolecule methylation, it seems plausible that patients with head and neck squamous cell carcinoma (HNSCC) may respond differe.. Read More»

Genet. Mol. Res. 14(4): 2015.October.26.6

DOI: 10.4238/2015.October.26.6

Plant Genetics   Research Article

Multivariate analysis of morphological characteristics of two species of passion flower with ornamental potential and of hybrids between them

    E.A. Santos, M.M. Souza, A.P. Viana, A.A.F. Almeida, J.C.O. Freitas and P.R. Lawinscky

We estimated genetic parameters through multivariate analysis of two species of Passiflora and their hybrids, considered of ornamental potential, based on the morphological characteristics: flower diameter, corona diameter, corona filament size, flower peduncle length, petal length and width, sepal length and width, internode length, stem diameter, leaf length, leaf.. Read More»

Genet. Mol. Res. 10(4): 2011.October.13.3

DOI: 10.4238/2011.October.13.3

Plant Genetics   Research Article

Multivariate analysis of backcross progeny of Passiflora L. (Passifloraceae) for pre-breeding genotype selection

    C.A.F. Melo, M.M. Souza, A.G.R. Sousa, A.P. Viana and E.A. Santos

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 identifi.. Read More»

Genet. Mol. Res. 14(4): 2015.November.30.15

DOI: 10.4238/2015.November.30.15

Human Genetics   Research Article

Artificial intelligence in the selection of common bean genotypes with high phenotypic stability

    A.M. Corrêa, P.E. Teodoro, M.C. Gonçalves, L.M.A. Barroso,M. Nascimento, A. Santos and F.E. Torres

Artificial neural networks have been used for various purposes in plant breeding, including use in the investigation of genotype x environment interactions. The aim of this study was to use artificial neural networks in the selection of common bean genotypes with high phenotypic adaptability and stability, and to verify their consistency with the Eberhart and Russel.. Read More»

Genet. Mol. Res. 15(2): gmr.15028230

DOI: 10.4238/gmr.15028230

Microbial Genetics   Research Article

Matrilineage differentiation of the genus Tetragonisca using mitochondrial DNA markers and the polymerase chain reaction-restriction fragment length polymorphism technique

    S.A. Santos, A.R. Bronzato, B.M.T. Moreira, K.F. Araujo, L. Ronqui, C.A. Mangolin, V.A.A. Toledo and M.C.C. Ruvolo-Takasusuki

The Meliponinae are important pollinators of plant species, and one of the most managed species is Tetragonisca angustula. Initially, two subspecies were identified in T. angustula: T. angustula angustula and T. angustula fiebrigi. Subsequently, T. a. fiebrigi was considered a species, based on the coloration of its mesepisternum. The objective of the present study was to obtain genetic markers.. Read More»

Genet. Mol. Res. 14(4): 2015.October.21.2

DOI: 10.4238/2015.October.21.2

Animal Genetics   Research Article

Critical electrolyte concentration of silk gland chromatin of the sugarcane borer Diatraea saccharalis, induced using agrochemicals

    S.A. Santos, F. Fermino, B.M.T. Moreira, K.F. Araujo, J.R.P. Falco and M.C.C. Ruvolo-Takasusuki

The sugarcane borer Diatraea saccharalis is widely known as the main pest of sugarcane crop, causing increased damage to the entire fields. Measures to control this pest involve the use of chemicals and biological control with Cotesia flavipes wasps. In this study, we evaluated the insecticides fipronil (Frontlin.. Read More»

Genet. Mol. Res. 13(3): 2014.September.29.9

DOI: 10.4238/2014.September.29.9

Cytogenomics   Research Article

Descriptor selection for banana accessions based on univariate and multivariate analysis

    L.P. Brandão, C.P.F. Souza, V.M. Pereira, S.O. Silva, J.A. Santos-Serejo, C.A.S. Ledo and E.P. Amorim

Our objective was to establish a minimum number of morphological descriptors for the characterization of banana germplasm and evaluate the efficiency of removal of redundant characters, based on univariate and multivariate statistical analyses. Phenotypic characterization was made of 77 accessions from Bahia, Brazil, using 92 descriptors. The selection of the descriptors was carried out by prin.. Read More»

Genet. Mol. Res. 12(2): 2013.May.14.1

DOI: 10.4238/2013.May.14.1