SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

CARVALHO, H.W.L. de; LEAL, M. de L. da S.; SANTOS, M.X. dos; CARDOSO, M.J.; MONTEIRO, A.A.T.; TABOSA, J.N..

No ano agrícola de 1997, 21 cultivares de milho foram submetidas a 26 diferentes condições ambientais no Nordeste brasileiro, visando conhecer a estabilidade de produção desses materiais para fins de recomendação na região. Foi utilizado o delineamento experimental em blocos casualizados, com três repetições. Foram detectadas diferenças entre os ambientes, as cultivares e comportamento diferencial das cultivares em face das variações ambientais, na análise de variância conjunta. A produtividade média obtida (4.301 kg/ha) mostra o bom potencial para a produtividade das cultivares avaliadas, e boa aptidão do Nordeste brasileiro para a produção de milho. Todas as cultivares mostraram estabilidade de produção nos ambientes considerados. Os híbridos, de...

Assessing the genotypic performance of carioca beans through mixed models.

Palavras-chave: Genetica; Genetic stability; Cultivar; Milho; Corn.

Ano: 2000

URL: http://www.alice.cnptia.embrapa.br/handle/doc/102062

SOUZA, I. P. de; SANTOS, P. R. dos; NASCIMENTO, M. R.; COSTA, K. D. da S.; LIMA, T. V.; OLIVEIRA, T. R. A. de; COSTA, A. F. da; PEREIRA, H. S.; SILVA, J. W. da.

Using genotypes adapted to different regions is one of the main ways to increase Brazilian bean yield. The aim of the present study was to assess the genotypic performance of Carioca beans through mixed models. Fourteen Carioca bean genotypes were assessed in four locations in Pernambuco State (Arcoverde, Caruaru, Belém de São Francisco and São João counties) in 2015. The experiments followed a completely randomized block design, with three repetitions. Genetic parameters were estimated according to the REML/BLUP methodology, whereas genotype selection was based on the harmonic mean of relative performance of genetic values method (MHPRVG). The mean genotype heritability had moderate magnitude, high selective accuracy, besides allowing selection of...

Biological stability of a strain of Cowpea severe mosaic virus over 20 years

Palavras-chave: REML/BLUP; Feijão; Phaseolus Vulgaris; Melhoramento Genético Vegetal; Genótipo; Produtividade; Beans; Genetic stability; Genotype.

Ano: 2018

URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1093307

Rev. Ciênc. Agron.

Lima,José Albersio Araujo; Nascimento,Aline Kelly Queiroz do; Silva,Ana Kelly Firmino da; Aragão,Maria do Livramento.

Cowpea (Vigna unguiculata) is an important crop of the traditional agriculture system in the Northeast of Brazil. It can be infected by more than 20 virus species and Cowpea severe mosaic virus (CPSMV) is one of the most important pathogens that naturally infect cowpea in Brazil. Several CPSMV isolates were obtained and characterized in the Plant Virus Laboratory at the Federal University of Ceará: CPSMV-CE - the first characterized isolate of the virus obtained from cowpea in the State of Ceará; CPSMV-AL - isolated from cowpea in Alagoas; CPSMV-PE - isolated from cowpea in Pernambuco; CPSMV-PR - obtained from soybean (Glycine max) in Paraná and CPSMV-CROT - isolated from Crotalaria paulinea, in Maranhão. An isolate of CPSMV with the property to infect the...

Dynamics of 45S rDNA sites in the cell cycle: fragile sites and chromosomal stability in Lolium and Festuca.

Palavras-chave: Genetic stability; Cowpea; Biological properties; Biological integrity.

Ano: 2012

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902012000100013

ROCHA, L. C.; SILVA, G. A.; BUSTAMANTE, F. O.; SILVEIRA, R. A. D.; MITTELMANN, A.; TECHIO, V. H..

Abstract Analyses carried out with fluorescence in situ hybridization (FISH) in C-metaphases of the Lolium-Festuca complex have shown the occurrence of spontaneous fragile sites (FSs) in 45S rDNA regions. FSs are expressed as gaps but they do not result in breaks or chromosomal fragments in these species. These gaps have high DNA condensation observed as thin chromatin fibers that connect the apparent segments of the fragile chromosome, allowing for genomic stability. Assessing the behavior of these regions in the cell cycle of Lolium and Festuca species may lead to a better understanding of the dynamics that preserve stability during cell division. Furthermore, it is interesting to track the dynamics of chromosomes bearing 45S rDNA sites in the cell cycle...

Evaluation of cassava plants generated by somatic embryogenesis at different stages of development using molecular markers

Palavras-chave: Genetic stability; Chromosomal fragments; Fragile site; Gene activity-dependent decondensation; Chromatin fiber; High decondensation.

Ano: 2017

URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1085223

Electron. J. Biotechnol.

Osorio,Mayra; Gámez,Elizabeth; Molina,Sandy; Infante,Diógenes.

Background: Cassava (Manihot esculenta Crantz) is a crop that is high in carbohydrates in the roots and in protein in the leaves, important for both human consumption and animal feed, and also has a significant industrial use for its starches. In this study we evaluated the genetic variability with molecular markers in different stages in micropropagated plants from somatic embryos of Venezuelan native clone 56. Results: Three markers were used: ISTR, AFLP and SSR, finding that ISTR showed the highest polymorphism among individuals tested. With AFLP a high similarity between the evaluated individuals was observed and with SSR total monomorphism was seen. Using cluster analysis it was found that individuals from an embryo labeled as fasciated at the...

Tipo: Journal article

Palavras-chave: AFLP; Genetic stability; ISTR; SSR; UPGMA.

Ano: 2012

URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582012000400003

Genetic and resistance stability to Black Sigatoka disease during micropopagation of Musa CIEN BTA-03 somaclonal variant

Phyton

Giménez,C; de García,E; Haddad,O.

Evaluation of clonal micropropagation and phenotype stability of elite somaclones are critical steps for development of new varieties. In the present work somaclon variant CIEN BTA-03 (resistant to Black Sigatoka), obtained through in vitro process from cultivar Williams (susceptible to Black Sigatoka), was micropropagated via apical shoot culture for five multiplication cycles in 0.5 mg/l of benzyl-aminopurine (BA). To verify the genetic stability of the progeny of this elite material, random amplified polymorphic DNA (RAPD) markers were used. A total of 5,292 monomorphic bands were obtained from the amplification of fifty six DNA samples (extracted from vitroplants randomly selected) with 10 different primer combinations. Non-polymorphic RAPD bands were...

URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572008000100006

Palavras-chave: Micropropagation; Genetic stability; RAPD; Disease resistance; Youngest leaf spotted (YLS).

Ano: 2008

Genetic potential of fusarium wilt-resistant elite common bean lines assessed in multiple environments.

PEREIRA, D. G.; FARIA, L. C. de; TORGA, P. P.; SOUZA, T. L. P. O.; MELO, L. C.; PEREIRA, H. S..

Fusarium wilt is a serious soil disease affecting common bean cultivation, especially crops under a central pivot irrigation system. Our objective was to identify bean lines that combine resistance to Fusarium wilt in the field with other desirable traits. Twenty-eight randomized block trials with three replicates were conducted in the rainy, winter, and dry seasons from 2009 to 2012 in the states of Goiás, Federal District, and Paraná. The trials were composed of six elite lines (one carioca and five black grain type) selected in a previous study as resistant to Fusarium wilt under controlled conditions and five cultivars (three carioca two black grain type). Variance analysis demonstrated variability for reaction to Fusarium wilt and anthracnose, yield,...

Genetic stability in rice micropropagation

Palavras-chave: Feijão; Phaseolus Vulgaris; Melhoramento Genético Vegetal; Fusarium Oxysporum; Antracnose; Beans; Fusarium wilt; Ammi; Genetic stability.

Ano: 2020

URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1126394

Biocell

Medina,R; Faloci,M; Marassi,M.A.; Mroginski,L.A..

An efficient clonal propagation procedure for six rice varieties cultivated in Argentina was developed by using shoot tip cultures, and the genetic stability of the micropropagated plants was verified by isozyme analysis. One week old seedlings obtained on MS medium were sectioned and subcultured on MS medium (0.75% agar) supplemented with different combination and concentrations of cytokinins (BAP and KIN) and auxins (2,4-D and NAA). After four weeks of culture, multiple shoots were obtained. The best response was observed on MS supplemented with BAP 5 mg l-1. Shoot clumps were multiplied in MS liquid medium containing BAP 5 mg l-1. Profuse rooting was obtained after transfer to MS medium lacking growth regulators and with sucrose 8% (w/v). Complete...

URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452004000100002

Palavras-chave: Micropropagation; Multiple shoots; Oryza sativa L.; Isozyme; Genetic stability.

Ano: 2004

Interação genótipo x ambiente no desempenho produtivo da soja no Paraná.

CARVALHO, C.G.P. de; ARIAS, C.A.A.; TOLEDO, J.F.F. de; ALMEIDA, L.A. de; KIIHL, R.A. de S.; OLIVEIRA, M.F. de.

Os objetivos deste trabalho foram conhecer o grau de representatividade dos locais no Estado do Paraná, onde são conduzidos os ensaios de avaliação final de produtividade de linhagens de soja no período 1990/2000 e realizar estudo de adaptabilidade e estabilidade das linhagens no ano agrícola 1999/2000. As linhagens testadas pertencem aos grupos de maturação precoce, semiprecoce e médio. Verificaram-se padrões de similaridade de resposta das linhagens dos três grupos de maturação, em alguns locais, em todos ou na maioria dos anos testados. Esses padrões dependeram do grupo de maturação. Contudo, as avaliações em Londrina/Cambé, Campo Mourão, Guarapuava/Mariópolis e Sertaneja foram sempre indicadas. O local Ponta Grossa - 1 foi útil na discriminação de...

Parámetros genéticos e interacción genotipo x ambiente en el crecimiento de progenies reintroducidas y nativas de Pinus patula.

Palavras-chave: Glycine max; Progênie; Adaptação; Estabilidade genética; Métodos de melhoramento; Progeny; Adaptation; Genetic stability; Breeding methods.

Ano: 2002

URL: http://www.alice.cnptia.embrapa.br/handle/doc/107480

Colegio de Postgraduados

Gómez Martínez, Procoro.

Pinus patula Schiede ex Schltdl. et. Cham., es una especie nativa de México ampliamente utilizada en plantaciones comerciales en diferentes regiones del mundo; la especie ha sido mejorada en el extranjero, y es necesario evaluar el material al ser reintroducido a su país de origen. Se comparó el crecimiento de 36 familias de medios hermanos seleccionadas en Colombia y Sudáfrica, reintroducidas en México (grupo R) y 36 familias de medios hermanos escogidas fenotípicamente en rodales naturales (grupo N), en dos sitios con ambientes contrastantes: Aquixtla, Puebla, a 2,930 m (S1) y Acaxochitlán, Hidalgo, a 2,260 m (S2). Se midió el diámetro normal, la altura total y el volumen del fuste a los siete y ocho años de edad, y la conformación del árbol y el número...

Palavras-chave: Análisis de estabilidad; Correlación genética tipo B; Crecimiento; Ganancia genética; Heredabilidad; IGA; Parámetros genéticos; Pinus patula; Progenies; Reintroducción; Adaptation; Ecovalence; Genetic stability; Genetic gain; Genetic parameters; Growth rate; GEI; Heritability; Progeny test; Type-B genetic correlation; Reintroduction; Forestal; Maestría.

Ano: 2013

URL: http://hdl.handle.net/10521/1892

Parámetros genéticos en características de crecimiento y densidad de la madera en progenies de Eucalyptus grandis

Colegio de Postgraduados

Harrand, Leonel.

Con el fin de determinar la estructura genética de las características de crecimiento y densidad de la madera (evaluada de manera directa y a través de la penetración del Pilodyn) y estimar la respuesta esperada a la selección masal en una población de Eucalyptus grandis formada por familias del NE de Queensland (Australia), se evaluó un ensayo de progenies a los 4.5 y 8.5 años de edad, establecido en tres sitios del NE argentino. Aunque se encontró una amplia variabilidad genética en todas las características evaluadas, las características de crecimiento [diámetro (DAP), altura (HT) y volumen (VOL)] mostraron diferente estructura y grado de control genético con respecto a las otras características [rectitud de fuste (FORM), proporción de corteza (COR) y...

Tipo: Tesis

Palavras-chave: Heredabilidad; Correlación genética; Correlación edad-edad; Estabilidad genética; Respuesta a la selección; Selección indirecta; Selección temprana; Densidad de la madera; Pilodyn; Maestría; Forestal; Heritability; Genetic correlation; Age-age correlation; Genetic stability; Response to selection; Indirect selection; Early selection; Wood density.

Ano: 2007

URL: http://hdl.handle.net/10521/1648

Phenotypic plasticity of upland rice lines cultivated in Minas Gerais State, Brazil.

INÁCIO, H. B.; BOTELHO, F. B. S.; MOURA, A. M. de; MENDES-RESENDE, M. P.; SANTOS, H. O. dos; CASTRO, A. P. de; REIS, M. de S.; BUSTAMANTE, F. O..

The evaluation of breeding lines for prior recommendation in different environments is a step that requires a high level of investment. This evaluation is extremely important, especially when the objective of breeding is to select lines with high homeostasis, adaptability associated with high yield, and stability. Thus, this paper aimed to study the phenotypic plasticity of thirteen upland rice lines for grain yield in multiple environments of Minas Gerais State, Brazil. The experiments were installed in nine different environments corresponding to the combination of locations and agricultural years. Thirteen elite lines were used, originating from a partnership between UFLA (Federal University of Lavras), Epamig (Agricultural Research Company of Minas...

Rescue of a non-viable accession and rapd analysis of recovered plants of Arachis retusa.

Palavras-chave: Arroz; Oryza Sativa; Fenótipo; Melhoramento Genético Vegetal; Produtividade; Grão; Rice; Genetic stability; Genotype-phenotype correlation; Plant breeding; Grains.

Ano: 2018

URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1101260

GAGLIARDI, R.F.; PACHECO, G.P.; OLIVEIRA, C.A.; CARNEIRO, L.A.; VALLS, J.F.M.; VIEIRA, M.L.C.; MANSUR, E..

In vitro regeneration of Arachis retusa was examined for the purpose of germplasm renewal and conservation. Random amplified polymorphic DNA (RAPD) fingerprinting was used to evaluate the genetic stability of plants derived from embryo axes and apical segments. Ten arbitrary decamer primers were screened and five of them were selected. Ninety genomic regions were evaluated, with an average of 18 loci per clone. All amplified segments were monomorphic. The results indicate that recovered plants are genetically stable at the assessed genomic regions and that both regeneration processes are suitable for in vitro germplasm preservation of Arachis species.

Rescue of a non-viable accession and rapd analysis of recovered plants of Arachis retusa

Palavras-chave: Germplasm conservation; Micropropagation; Molecular characterization; Genetic stability; Conservação de germoplasma; Micropropagação; Caracterização molecular; Estabilidade genética.

Ano: 2004

URL: http://www.alice.cnptia.embrapa.br/handle/doc/110084

PAB

Gagliardi,Rachel Fatima; Pacheco,Georgia Pereira; Oliveira,Carlos Alberto; Carneiro,Leonardo Alves; Valls,José Francisco Montenegro; Vieira,Maria Lucia Carneiro; Mansur,Elisabeth.

Stability and adaptability of sweet orange using mixed models.

Palavras-chave: Germplasm conservation; Micropropagation; Molecular characterization; Genetic stability.

Ano: 2004

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2004000200015

CAPISTRANO, M. da C.; ANDRADE NETO, R. de C.; SANTOS, V. B. dos; LESSA, L. S.; RESENDE, M. D. V. de; GURGEL, F. de L..

Evaluations with sweet oranges are usually performed in several harvests and places to verify the differential behavior according to the environmental variations. This makes the selection by traditional statistical methodologies more and more difficult since they have limitations in the case of data unbalanced, common in citrus during the experimental phase due to the possibility of plot loss over the years. The objective of this work was to estimate the temporal stability and adaptability of sweet orange genotypes cultivated in eight crops under the edaphoclimatic conditions of Rio Branco, Acre. The experimental design used was in randomized blocks containing 55 genotypes and three replications. Four agronomic characteristics were evaluated during eight...