Genetic And Environmental Correlation
Mostrando 25-36 de 112 artigos, teses e dissertações.
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25. Genetic avaluacion for persistency of lactation in Holstein cows using a random regression model
A model for analyzing test day records including both fixed and random coefficients was applied to the genetic evaluation of first lactation data for Holstein cows. Data comprising 87045 test-day milk yield records from calving between 1997 and 2001 from Holstein herds in 10 regions of the Brazilian state of Minas Gerais. Six persistency of lactation measure
Publicado em: 2010
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26. Mapeamento de QTLs e estudo da interação entre QTLs, ambientes e cortes em cana-de-açúcar, usando a abordagem de modelos mistos / A mixed-model QTL analysis for sugarcane multiple-harvest-location trial data
Os programas de melhoramento da cana-de-açúcar demandam aproximadamente 12 anos para a obtenção de um novo cultivar. Assim, os marcadores moleculares podem ser usados como uma ferramenta valiosa, uma vez que possibilitamo estudo da arquitetura genética de caracteres quantitativos, ajudando a reduzir este tempo. Embora a cana-de-açúcar seja uma cultura
Publicado em: 2010
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27. UtilizaÃÃo de tÃcnicas multivariadas e moleculares na caracterizaÃÃo e seleÃÃo de genÃtiopos de feijÃo-caupi de porte ereto e ciclo precoce / use of multivariate techniques and molecular characterization and selection of erect and early cowpea genotypes
Cowpea has great socioeconomic importance in relation to their high contents of protein, drought resistance and good yield. Being cultivated in tropical and subtropical regions of Africa, Brazil and Asia, cowpea is cultivated predominantly by small farmers who use few technological resources. In recent years, cowpea has drawn the attention of medium and larg
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/08/2009
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28. Genotype by environment interaction for 450-day weight of Nelore cattle analyzed by reaction norm models
Genotype by environment interactions (GEI) have attracted increasing attention in tropical breeding programs because of the variety of production systems involved. In this work, we assessed GEI in 450-day adjusted weight (W450) Nelore cattle from 366 Brazilian herds by comparing traditional univariate single-environment model analysis (UM) and random regress
Genetics and Molecular Biology. Publicado em: 06/03/2009
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29. Efeito da competição dentro de parcelas, da interação genótipos x ambientes e influência de estratégias de seleção no melhoramento genético de eucalipto / Effect of competition within plots, of the genotype x environment interaction and influence of selection strategies in genetic breeding of Eucalypt
The aim was to determine the genetic parameters of progeny tests in Eucalyptus grandis Hill Maiden with 3 years old under competicional effect, as well as to study the genotype x environment interaction and its impact on strategies for direct and indirect selection and analyze different selection strategies like selection among and within, mass, stratified m
Publicado em: 2009
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30. Análises biométricas e mapeamento de QTLS para tolerância à seca em milho / Biometric analysis and mapping of QTLS for drought tolerance in maize
One of the major goals of crop improvement is the increase in agricultural productivity associated with the improvement for the consumption in human or animal feeding. These goals can be achieved through improvements in environmental conditions or by improving the genetic potential of populations. Recently, much has been discussed about global warming, clima
Publicado em: 2009
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31. Avaliação de progênies F2:4 de uma população de soja e perspectivas de melhoramento / Evaluation of F2:4 progenies of a soybean population and breeding perspectives
Os objetivos do presente trabalho compreenderam a obtenção de estimativas de parâmetros genéticos e fenotípicos, como variâncias, correlações, herdabilidades e respostas à seleção, em uma população derivada do cruzamento entre as linhagens 14 e 56 de soja, contrastantes para produção de grãos. Os tratamentos consistiram de uma amostra de 89 p
Publicado em: 2009
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32. Study of PTPN11 and KRAS genes in patients with Noonan and Noonan-like syndromes / Estudo dos genes PTPN11 e KRAS em pacientes afetados pela síndrome de Noonan e pelas síndromes Noonan-like
INTRODUCTION: Noonan syndrome shows autosomal dominant inheritance, and is a relatively frequent disease in the population, with an estimated incidence between 1/1000 and 1/2500 live births. The main clinical features are: facial dysmorphisms, short stature, cryptorchidism and cardiac abnormalities. The differential diagnosis between Noonan syndrome and Noon
Publicado em: 2009
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33. Imputação de dados em experimentos com interação genótipo por ambiente: uma aplicação a dados de algodão / Data imputation in trials with genotype by environment interaction: an application on cotton data
Os experimentos multiambientes são um tipo especial dos experimentos bifatoriais, muito usados em melhoramento genético de plantas, nos quais algumas cultivares são avaliadas em diferentes locais. Geralmente nesses estudos se encontra uma resposta diferencial das cultivares em cada local que é chamada de interação genótipo x ambiente ou G x E, que é
Publicado em: 2009
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34. Developmental genetic analysis of fruit shape traits under different environmental conditions in sponge gourd (Luffa cylindrical (L) Roem. Violales, Cucurbitaceae)
Analysis of genetic main effects and genotype × environment (GE) interaction effects for the fruit shape traits fruit length and fruit circumference in the sponge gourd (Luffa cylindrical (L) Roem. Violales, Cucurbitaceae) was conducted for diallel cross data from two planting seasons. A genetic model including fruit direct effects and maternal effects and
Genetics and Molecular Biology. Publicado em: 2008
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35. Estimativa e parâmetros genéticos para características de crescimento e perímetro escrotal na raça Pardo Suíço Corte / Estimation of genetic parameters for growth traits and scrotal circumference in Braunvieh cattle
The aim of this study was to investigate a database of the Braunvieh cattle in Brazil, to estimate genetic parameters for growth traits, preweaning and postweaning weight gains and scrotal circumference, as well as carcass traits in purebreed and crossbreed Braunvieh cattle. The growth traits analyzed were birth weight (PN), weight at 120 days (P120), 205 da
Publicado em: 2008
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36. Estimation of genetic parameters among families of clones intra and interspecific elephantgrass hybrids in two forms of genetic evaluation. / Parâmetros genéticos entre híbridos de capim-elefante sob duas formas de avaliação.
The objective of this study was to compare two forms of assessment based on data per se and in the form of genetically stratified selection from genetic parameters in cross intra and inter-specific elephantgrass. The study was conducted in the Itambé Experimental Station, of the Pernambuco Agronomic Institute IPA. For definition of estimated genetic paramet
Publicado em: 2008