Estudo genético de critérios de seleção ligados à eficiência reprodutiva e ao crescimento de machos e fêmeas da raça Canchim

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Estudo genético quantitativo de características de crescimento e reprodutivas em bovinos da raça Brahman no Brasil

Pós-graduação em Genética e Melhoramento Animal - FCAV

Análise por sequências multilocus de Xanthomonas fuscans subsp. aurantifolii

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Análise clássica e bayesiana do modelo Weibull modificado generalizado

Pós-graduação em Matematica Aplicada e Computacional - FCT

Spatial distribution of Yellow Sigatoka Leaf Spot correlated with soil fertility and plant nutrition

This study analyzed the spatial distribution of Yellow Sigatoka Leaf Spot relative to soil fertility and plant nutritional status using geostatistics. The experimental area comprised 1.2 ha, where 27 points were georeferenced and spaced on a regular grid 18 × 18 m. The severity of Yellow Sigatoka, soil fertility and plant nutritional status were evaluated at each point. The spherical model was adjusted for all variables using restricted maximum likelihood. Kriging maps showed the highest infection rate of Sigatoka occurred in high areas of the field which had the highest concentration of sand, while the lowest disease was found in lower areas with lower silt, organic matter, total exchangeable bases, effective cation exchange capacity, base saturation, Ca and Mg in soil, and foliar sulfur (S). These results may help farmers manage Yellow Sigatoka disease more effectively, with balanced fertilization and reduced fungicide application. This practice minimizes the environmental impact and cost of production while contributing to production sustainability.

Regressão Simplex aplicada a delineamentos de mistura e utilização do Algoritmo Boosting

In the composition of this work are present two parts. The first part contains the theory used. The second part contains the two articles. The first article examines two models of the class of generalized linear models for analyzing a mixture experiment, which studied the effect of different diets consist of fat, carbohydrate, and fiber on tumor expression in mammary glands of female rats, given by the ratio mice that had tumor expression in a particular diet. Mixture experiments are characterized by having the effect of collinearity and smaller sample size. In this sense, assuming normality for the answer to be maximized or minimized may be inadequate. Given this fact, the main characteristics of logistic regression and simplex models are addressed. The models were compared by the criteria of selection of models AIC, BIC and ICOMP, simulated envelope charts for residuals of adjusted models, odds ratios graphics and their respective confidence intervals for each mixture component. It was concluded that first article that the simplex regression model showed better quality of fit and narrowest confidence intervals for odds ratio. The second article presents the model Boosted Simplex Regression, the boosting version of the simplex regression model, as an alternative to increase the precision of confidence intervals for the odds ratio for each mixture component. For this, we used the Monte Carlo method for the construction of confidence intervals. Moreover, it is presented in an innovative way the envelope simulated chart for residuals of the adjusted model via boosting algorithm. It was concluded that the Boosted Simplex Regression model was adjusted successfully and confidence intervals for the odds ratio were accurate and lightly more precise than the its maximum likelihood version.

Variação genética para caracteres silviculturais e marcador molecular em uma população base de Eucalyptus camaldulensis Dehnh

Pós-graduação em Agronomia - FEIS

Variações genéticas para caracteres silviculturais em progênies e procedências de Dipteryx alata Vogel

Pós-graduação em Ciência Florestal - FCA

Classificação de cobertura do solo utilizando árvores de decisão e sensoriamento remoto

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Taxonomia e filogenia de algumas espécies de Mazama (Mammalia; Cervidae) da Colômbia

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Ajustes de curvas de crescimento e estimativas da variabilidade genética de peso corporal de avestruzes (Struthio camelus)

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Modelos mistos na avaliação e ordenação de genótipos de cana-de-açúcar, com e sem efeitos de competição com parcelas vizinhas

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Estudo genético e quantitativo da contagem de células somáticas em bubalinos leiteiros

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Molecular phylogeny of the genus Saguinus (Platyrrhini, Primates) based on the ND1 mitochondrial gene and implications for conservation

The systematics of the subfamily Callitrichinae (Platyrrhini, Primates), a group of small monkeys from South America and Panama, remains an area of considerable discussion despite many investigations, there being continuing controversy over subgeneric taxonomic classifications based on morphological characters. The purpose of our research was to help elucidate the phylogenetic relationships within the monkey genus Saguinus (Callitrichinae) using a molecular approach to discover whether or not the two different sections containing hairy-faced and bare-faced species are monophyletic, whether Saguinus midas midas and Saguinus bicolor are more closely related than are S. midas midas and Saguinus midas niger, and if Saguinus fuscicollis melanoleucus and Saguinus fuscicollis weddelli really are different species. We sequenced the 957 bp ND1 mitochondrial gene of 21 Saguinus monkeys (belonging to six species and nine morphotypes) and one Cebus monkey (the outgroup) and constructed phylogenetic trees using maximum parsimony, neighbor joining, and maximum likelihood methods. The phylogenetic trees obtained divided the genus Saguinus into two groups, one containing the small-bodied species S. fuscicollis and the other, the large-bodied species S. mystax, S. leucopus, S. oedipus, S. midas, S. bicolor. The most derived taxa, S. midas and S. bicolor, grouped together, while S. fuscicollis melanoleucus and S. f. weddelli showed divergence values that did not support the division of these morphotypes into subspecies. On the other hand, S. midas individuals showed divergence compatible with the existence of three subspecies, two of them with the same morphotype as the subspecies S. midas niger. The results of our study suggest that there is at least one Saguinus subspecies that has not yet been described and that the conservation status of Saguinus species and subspecies should be carefully revised using modern molecular approaches.

Phylogenetic relationships among Brazilian howler monkeys, genus Alouatta (Platyrrhini, Atelidae), based on γ¹-globin pseudogene sequences

Os guaribas, do gênero Alouatta, que são os primatas do Novo Mundo com maior distribuição geográfica, têm sido colocados em três grupos de espécies: o grupo Alouatta palliata da América central, e os grupos sulamericanos Alouatta seniculus e Alouatta caraya. Este último é monotípico, mas o grupo A. seniculus inclui pelo menos três espécies (A. seniculus, A. belzebul e A. fusca). Neste estudo, foram seqüenciados aproximadamente 600 pares de base do pseudogene globina g1 nas quatro espécies brasileiras (A. seniculus, A. belzebul, A. fusca e A. caraya). Os métodos de máxima parcimônia e máxima verossimilhança produziram árvores filogenéticas com o mesmo arranjo: {A. caraya [A. seniculus (A. fusca, A. belzebul)]}. A árvore mais parcimoniosa apresentou valores de bootstrap maiores de 82% para todos os agrupamentos, e valores de força de ligação de pelo menos 2, apoiando o agrupamento irmão de A. fusca e A. belzebul. O estudo também confirmou a presença em A. fusca do elemento de inserção Alu, com 150 pares de base, e uma deleção de 1,8 kb no pseudogene globina g1 já conhecidos nas demais espécies de guaribas. A classificação cladística baseada em dados moleculares é congruente com as de estudos morfológicos, com um isolamento claro do grupo monoespecífico A. caraya em relação ao grupo A. seniculus.