Heterogeneity Of Variances
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. Interactive effects of genotype x environment on the live weight of GIFT Nile tilapias
ABSTRACT In this paper, the existence of a genotype x environment interaction for the average daily weight in GIFT Nile tilapia (Oreochromis niloticus) in different regions in the state of Paraná (Brazil) was analyzed. The heritability results were high in the uni-characteristic analysis: 0.71, 0.72 and 0.67 for the cities of Palotina (PL), Floriano (FL) an
An. Acad. Bras. Ciênc.. Publicado em: 11/12/2017
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2. Genetic evaluation of European quails by random regression models
The objective of this study was to compare different random regression models, defined from different classes of heterogeneity of variance combined with different Legendre polynomial orders for the estimate of (co)variance of quails. The data came from 28,076 observations of 4,507 female meat quails of the LF1 lineage. Quail body weights were determined at b
R. Bras. Zootec.. Publicado em: 2012-09
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3. Heterogeneide de variâncias nos grupos genéticos formadores da Raça Canchim.
2001
Revista Brasileira de Zootecnia. Publicado em: 2011
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4. Bayesian multiple comparisons in homocedastic and heterocedastic normal models. / ComparaÃÃes MÃltiplas Bayesianas em Modelos Normais HomocedÃsticos e HeterocedÃsticos
Multiple comparison procedures are used to compare factorâs levels means. Nevertheless, the most popular tests show problems concerning the ambiguity of results and the control of type I error. Methods based on cluster analysis have been proposed to avoid ambiguity, but they present the problem of being valid only under normality. An alternative to avoid th
Publicado em: 2008
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5. Avaliação do crescimento de codornas de corte utilizando modelos de regressão aleatória / Evaluation of quail meat growth using random regression models
The data used in this study originates from 26835 and 27447 observations, from 3909 and 4040 meat quails of the UFV-1 and UFV-2 lineage, respectively, pertaining to the Program of Genetic Improvement of Poultry of the Federal University of Viçosa. The characteristic physical weight was evaluated in the two lineages, 1, 7, 14, 21, 28, 35 and 42 days of age,
Publicado em: 2008
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6. PLANO AMOSTRAL PARA COLETA DE SERAPILHEIRA NA FLORESTA OMBRÓFILA MISTA NO ESTADO DO RIO GRANDE DO SUL / SAMPLING PLAN FOR LITTER COLECTION IN THE ARAUCARIA FOREST ON STATE THE RIO GRANDE DO SUL
The present work was carried out at the National Forest of São Francisco de Paula - FLONA/RS Araucaria Forest, which is of a great species diversity of Rio Grande do Sul. Litter is the material deposited on the soil in the forests and this is very important to the maintenance of soil fertility, because this is how the nutrients return to the plants in the e
Publicado em: 2007
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7. On stochastic modeling of groundwater flow and solute transport in multi-scale heterogeneous formations
A numerical moment method (NMM) is applied to study groundwater flow and solute transport in a multiple-scale heterogeneous formation. The formation is composed of various materials and conductivity distribution within each material is heterogeneous. The distribution of materials in the study domain is characterized by an indicator function and the conductiv
Computational & Applied Mathematics. Publicado em: 2004-12
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8. Evaluation of data transformations used with the square root and schoolfield models for predicting bacterial growth rate.
A comparison was made between mathematical variations of the square root and Schoolfield models for predicting growth rate as a function of temperature. The statistical consequences of square root and natural logarithm transformations of growth rate use in several variations of the Schoolfield and square root models were examined. Growth rate variances of Ye
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9. Microplate fecal coliform method to monitor stream water pollution.
A study has been carried out on the Moselle River by means of a microtechnique based on the most-probable-number method for fecal coliform enumeration. This microtechnique, in which each serial dilution of a sample is inoculated into all 96 wells of a microplate, was compared with the standard membrane filter method. It showed a marked overestimation of abou
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10. A pharmacogenetic approach to blood pressure in Lyon hypertensive rats. A chromosome 2 locus influences the response to a calcium antagonist.
In a backcross population (n = 281) derived from a cross of the Lyon hypertensive rat with Lyon normotensive rat, we investigated whether genetic factors influence the acute cardiovascular responses to pharmacological modulation of the renin-angiotensin system, the sympathetic nervous system, and the voltage-sensitive L-type calcium channels. Using microsate
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11. Population Genetics of Euphydryas Butterflies. I. Genetic Variation and the Neutrality Hypothesis
Twenty-one populations of the checkerspot butterfly, Euphydryas editha, and ten populations of Euphydryas chalcedona were sampled for genetic variation at eight polymorphic enzyme loci. Both species possessed loci that were highly variable from population to population and loci that were virtually identical across all populations sampled. Our data indicate t