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Search Results: 1 - 10 of 200145 matches for " Mario Luiz Teixeira de Moraes "
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Análise genética de fenótipos isoenzimáticos e desequilíbrio de liga o em Myracrodruon urundeuva Fr. All. Genetic analysis of isoenzymes phenotypes and linkage disequilibrium in Myracrodruon urundeuva Fr. All.
Mario Luiz Teixeira de MORAES,Selma Maria Bozzite MORAES,Alexandre Magno SEBBENN,Paulo Yoshio KAGEYAMA
Revista do Instituto Florestal , 2004,
Abstract: A heran a e o desequilíbrio de liga oforam estudadas em seis locos polimórficos (Got-1,Got-2, Lap-1, 6pgdh-1, Pgi-2 e Pgm-1) de cincosistemas isoenzimáticos (GOT, LAP, PGI, 6PGD ePGM) revelados em 55 progênies de poliniza oaberta de duas popula es de Myracrodruonurundeuva Fr. All. (aroeira) do Estado de S oPaulo. A rela o de liga o entre locos foi estudadapela medida composta de desequilíbrio de liga ode Burrows. A segrega o para os locos foigeralmente homogênea entre árvores. No loco Got-1foi detectado desvio da raz o de segrega o esperada1:1. Evidências de desequilíbrio de liga o foramobservadas entre os locos: Lap-1:Pgi-2.Inheritance and linkage disequilibriumwere studied in six polymorphic enzyme loci(Got-1, Got-2, Lap-1, 6pgdh-1, Pgi-2 and Pgm-1)from five isozymes systems (GOT, LAP, PGI,6PGD e PGM) in 55 open-pollinated families oftwo Myracrodruon urundeuva Fr. All. (aroeira)populations of S o Paulo State. Burrowscomposite measure of linkage disequilibrium wasused to study linkage relationship between loci.Gene segregation of loci was generallyhomogeneous among trees. Got-1 locus showedsignificant departure from the expected 1:1segregation ratio. Linkage disequilibrium evidencewas detected between a pair of loci: Lap-1:Pgi-2.
Diversidade e estrutura genética espacial em duas popula??es de Myracrodruon urundeuva Fr. All. sob diferentes condi??es antrópicas
Moraes, Mario Luiz Teixeira de;Kageyama, Paulo Yoshio;Sebbenn, Alexandre Magno;
Revista árvore , 2005, DOI: 10.1590/S0100-67622005000200011
Abstract: the diversity and spatial genetic distribution of myracrodruon urundeuva genotypes were studied in two brazilian populations in the southwest (selvíria-sel) and southeast brazilian regions (paulo de faria-pfa). twenty-five and thirty adult individuals were evaluated for five allozyme systems in sel and pfa populations, respectively. estimates of the genetic divergence between populations were low (=0.043). observed and expected heterozygosities were high in both populations (0.317 to 0.511, respectively). significant and excessive number of heterozygotes was detected in pfa population (=-0.252). the spatial distribution analysis through moran's index i revealed a significant structuring up to 5,224 m in the more exploited population (sel, =0.09) and a trend to randomness in the less exploited area (pfa, = -0,02). seed dispersion near mother trees and the recolonization process through seeds from few genotypes are probable causes of the structuring in the sel population. the implications of the results are discussed from the conservation and breeding point of views.
Propriedades químicas de solo sob reflorestamento ciliar após 20 anos de plantio em área de cerrado
Silva, Alexandre Marques da;Moraes, Mario Luiz Teixeira de;Buzetti, Salatiér;
Revista árvore , 2011, DOI: 10.1590/S0100-67622011000100012
Abstract: chemical properties of a soil change with soil management. this study had as its objective to evaluate the chemical properties of soil under riparian reforestation after twenty years of planting in an area under savannah belonging to experimental station, fepe/unesp, of engineering college of ilha solteira. chemical analysis of the soil was accomplished (p, organic matter (mo), ph, k, ca, mg, h+al, al and s) in 33 modules, with 3 repetitions in two depths (0.0 - 0.20 and 0.20 - 0.40 m) in a randomized block design in a hierarchical outline. the results indicated that the chemical properties of soil under riparian reforestation are similar to the properties of the soil without human disturbance in this region. the species planted in riparian reforestation are contributing to the deposition of organic material enough to have a recycling of nutrients and maintain the chemical properties of soil in good condition to have the establishment of riparian vegetation.
Biochemical traits useful for the determination of genetic variation in a natural population of Myracrodruon urundeuva
Abdala Ludmila,Moraes Mario Luiz Teixeira de,Rechia Carem Gledes Vargas,Giorgini Jarbas Francisco
Pesquisa Agropecuária Brasileira , 2002,
Abstract: The objectives of this work were to analyze seeds from 20 trees of aroeira (Myracrodruon urundeuva Fr. All.) of a natural population located in the region of Selvíria, State of Mato Grosso do Sul, Brazil, in order to evaluate their protein, lipid and carbohydrate contents, and to estimate their genetic variation. A completely randomized experimental design consisting of 20 treatments (families) was set up, with two replications. Four types of proteins were detected: albumin (35.0 to 107.3 mg/g seed), globulin (3.4 to 9.3 mg/g), prolamin (60.0 to 135.2 mg/g) and glutelin (118.0 to 286.0 mg/g). The lipid content varied between 200 and 334 mg/g seed. The total sugars also varied (26.5 to 46.3 mg/g seed), with a predominance of polyols (arabinitol, mannitol, glucitol and xylitol). The main monosaccharides detected were glucose and arabinose. Total hydrolysis of the sugars indicated the presence of neutral arabinan and xylan oligosaccharides. The starch content varied from 0.35 to 1.58 mg/g seed. These biochemical traits showed considerable genetic variability, indicating that only the collection of seeds from many different trees can provide a representative sample of the population for conservation and genetic improvement.
Genetic diversity between and within populations of Handroanthus heptaphyllus (Vell.) Mattos using microsatellite markers
Neide Tomita Mori,Mario Luiz Teixeira de Moraes,Caroline Midori Morita,Edson Seizo Mori
CERNE , 2012,
Abstract: Handroanthus heptaphyllus (Vell.) Mattos, popularly known as ipê-roxo, is a species of the family Bignoneaceae much appreciated for its beauty, excellent quality wood which is used for making medicinal products and also in reforestation programs of degraded areas, as well as landscaping and restoration. The aim of this study was to investigate the genetic diversity between and within populations of H. heptaphyllus using microsatellite markers. The 192 seedlings were produced from seeds collected on 30 trees into the two populations of natural forest fragments in Botucatu region, S o Paulo, Brazil. Eight microsatellite loci were analyzed, with allelic polymorphism varying from six alleles for locus TAU22 to 14 alleles for loci TAU12, TAU30, and TAU31, with an expected mean number of alleles per locus (Ae) of 4.9. The mean expected heterozygosity (He) for the two populations was 0.785, the mean observed heterozygosity (Ho) was 0.609, and the fixation index (F) was low between populations, with a mean of 0.222. The gene differentiation between the two populations (Gst) was 0.100. We concluded that the higher genetic diversity is within populations; therefore, as far as germplasm collection programs in Botucatu region are concerned, it is recommended that a larger sampling of individuals should be considered within populations, thereby providing good genetic representativeness. The populations have enough genetic diversity to support genetic improvement and germplasm preservation programs.
Biochemical traits useful for the determination of genetic variation in a natural population of Myracrodruon urundeuva
Abdala, Ludmila;Moraes, Mario Luiz Teixeira de;Rechia, Carem Gledes Vargas;Giorgini, Jarbas Francisco;Sá, Marco Eustáquio de;Polizeli, Maria de Lourdes Teixeira de Moraes;
Pesquisa Agropecuária Brasileira , 2002, DOI: 10.1590/S0100-204X2002000700003
Abstract: the objectives of this work were to analyze seeds from 20 trees of aroeira (myracrodruon urundeuva fr. all.) of a natural population located in the region of selvíria, state of mato grosso do sul, brazil, in order to evaluate their protein, lipid and carbohydrate contents, and to estimate their genetic variation. a completely randomized experimental design consisting of 20 treatments (families) was set up, with two replications. four types of proteins were detected: albumin (35.0 to 107.3 mg/g seed), globulin (3.4 to 9.3 mg/g), prolamin (60.0 to 135.2 mg/g) and glutelin (118.0 to 286.0 mg/g). the lipid content varied between 200 and 334 mg/g seed. the total sugars also varied (26.5 to 46.3 mg/g seed), with a predominance of polyols (arabinitol, mannitol, glucitol and xylitol). the main monosaccharides detected were glucose and arabinose. total hydrolysis of the sugars indicated the presence of neutral arabinan and xylan oligosaccharides. the starch content varied from 0.35 to 1.58 mg/g seed. these biochemical traits showed considerable genetic variability, indicating that only the collection of seeds from many different trees can provide a representative sample of the population for conservation and genetic improvement.
Divergência genética entre progênies de Pinus caribaea var. caribaea com base em caracteres quantitativos Genetic divergence among progenies of Pinus caribaea var. caribaea under quantitative characters
Janete Motta da Silva,Ananda Virgínia de Aguiar,Edson Seizo Mori,Mario Luiz Teixeira de Moraes
Pesquisa Florestal Brasileira , 2012, DOI: 10.4336/2012.pfb.69.69
Abstract: O objetivo desse trabalho foi quantificar a dissimilaridade genética entre progênies de P. caribaea var. caribaea para identificar genitores divergentes, visando gerar genótipos mais produtivos e avaliar a variabilidade total por meio de alguns caracteres fenotípicos de importancia comercial. Assim, um teste de progênies de P. caribaea var. caribaea foi implantado em delineamento experimental látice 10 x 10 triplo, com 99 progênies e uma testemunha comercial em Selvíria, MS. Foram avaliados os caracteres quantitativos antes e após desbaste aos 14 anos, tais como: altura total de plantas (m), diametro à altura do peito - DAP (cm); volume (m3 árvore-1); forma do fuste das árvores, densidade básica da madeira, na altura do DAP - DBM-1, e na metade da altura da árvore - DBM-2 (g cm-3); e sobrevivência das progênies (%). Houve baixa divergência genética entre as progênies de P. caribaea var. caribaea. O DAP foi o caráter que mais contribuiu para a divergência genética entre as progênies, tanto antes quanto depois do desbaste. As informa es geradas com base na distancia generalizada de Mahalanobis e o agrupamento das progênies pelo método de Tocher ser o usadas para definir as estratégias a serem adotadas em futuros programas de melhoramento e conserva o genética desta espécie. doi: 10.4336/2012.pfb.32.69.69 The objective of this research was to quantify the genetic dissimilarity among P.caribaea var. caribaea progenies to identify divergent parents aiming to generate highly productive genotypes and to evaluate the total variability by phenotypic characters of commercial importance. The progeny trial of P. caribaea var. caribaea was set up through 10 x 10 triple lattice design, with 99 progenies and a commercial control in Selvíria, MS, Brazil. We have evaluated quantitative characters before and after thinning procedures such as: total plant height (m), diameter at breast height (dbh) (cm); wood volume (m3 tree-1), stem form, wood density at dbh and wood density at the middle of the total height of tree stem (g cm-3), and survival of progenies (%). There was low genetic divergence among P. caribaea var. caribaea progenies. The diameter at breast height was the character that most contributes to genetic diversity among progenies, for both before and after thinning. The information of Mahalanobis distance and the clustering of progenies by Tocher's method will be important to define the future strategies for breeding programs and genetic conservation of the species. doi: 10.4336/2012.pfb.32.69.69
Varia??o genética em progênies de Myracrodruon urundeuva F.F. & M.F. Allem?o em três sistemas de cultivo
Freitas, Miguel Luiz Menezes;Aukar, Ana Paula de Andrade;Sebbenn, Alexandre Magno;Moraes, Mario Luiz Teixeira de;Lemos, Eliana Gertrudes Macedo;
Revista árvore , 2006, DOI: 10.1590/S0100-67622006000300001
Abstract: myracrodruon urundeuva is one of the tree species the wood that presents the longest durability when in contact with soil. because of this characteristic, populations of m. urundeuva have been decimated throughout brazil. therefore, this work aimed at analyzing the expression of genetic variation in a natural population of m. urundeuva from the ecological station of the forest institute, located in paulo de faria-sp. seeds were collected from 30 free-pollination trees in september, 1996. by using this material, three progeny trials were installed in different planting systems in selvíria - ms, following a block design with 30 treatments (progenies) and three replications. the mixed crossbreeding model for m. urundeuva was assumed. significant differences were observed for progeny effects (progeny trials) although the progenies-environments interaction was not significant. thus, progenies presented the same behavior in different environments; however, their best performance was in the planting involving m. urundeuva, guazuma ulmifolia (lam) and anandenanthera falcata (benth. speg.). the progenies also presented considerable genetic variation; hence its utilization in programs for conservation and genetic improvement.
Genetic Variability in Myracrodruon urundeuva (Allem?o) Engl. Progeny Tests  [PDF]
Daniela Silvia de Oliveira Canuto, Alexandre Marques da Silva, Miguel Luiz Menezes Freitas, Alexandre Magno Sebbenn, Mario Luiz Teixeira de Moraes
Open Journal of Forestry (OJF) , 2017, DOI: 10.4236/ojf.2017.71001
Abstract: Aroeira (Myracrodruon urundeuva) is a widely spread tree species, but due to its excellent wood quality it is now part of the list of vulnerable trees for extinction. Thus, strategies for the conservation of the genetic variability of the remaining natural populations are needed. Therefore, this study aimed to evaluate the genetic variability in M. urundeuva progeny tests, from natural populations located in areas with and without human disturbance. Seeds of six natural populations of M. urundeuva were collected from two conditions, with and without anthropogenic disturbance, and nine progeny tests were installed in the Education, Research and Extension Farm, located in Selvíria, Mato Grosso do Sul State, Brazil. The overall height, average crown diameter (DMC) and the diameter at breast height (DBH) were assessed as phenotypic traits. Estimates of variance components and genetic parameters were obtained by REML/BLUP method (maximum restricted likelihood/best unbiased linear prediction). The results showed that natural population with human disturbance presented less genetic variability than populations originating from areas without human disturbance (CVr until 0.87). The progeny tests evaluated had high accuracy (0.91 for DBH), which ensures the viability of the ex situ genetic conservation bank and its successful use in the breeding program, i.e., in the conversion of the progeny tests into M. urundeuva seed orchards. The most suitable character for selection was the DBH.
Ganho genético com base no tamanho efetivo populacional de progênies de seringueira
Arantes, Flávio Cese;Gon?alves, Paulo de Souza;Scaloppi Junior, Erivaldo José;Moraes, Mario Luiz Teixeira de;Resende, Marcos Deon Vilela de;
Pesquisa Agropecuária Brasileira , 2010, DOI: 10.1590/S0100-204X2010001200012
Abstract: the objective of this work was to evaluate genetic gains of a rubber tree progeny test for dry rubber yield and, based in the largest effective size and largest genetic gain, to get the best individuals. thirty progenies of half-sib from seeds of mixed pollination - autogamy and outcrossing - clone tests from state of s?o paulo were used. an experimental design in randomized block was used with 30 treatments (progenies), three replications, and plots of 10 plants, spaced 3x3 m, comprising a total of 900 useful plants. at three years old, girth growth at 50 cm of the ground (pa50) and dry rubber yield (pbs) were evaluated using the test hamaker-mann morris (hmm). the variables were analyzed through the method of linear mixed model reml/blup in progenies that showed mixed mating system and self-pollination rate of 22%. the identification of the 20 best individuals for pbs and pa50 provided a genetic gain of 67.96 and 16.48%, respectively, and an inbreeding coefficient of approximately 2.82%. the progeny test provides seed production with better breeding value, high genetic variability and low inbreeding
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