Multiple Trait Selection
Mostrando 1-12 de 40 artigos, teses e dissertações.
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1. Academic English Proficiency Assessment Using a Computerized Adaptive Test
RESUMO Este trabalho descreve as etapas de transformação de um exame de proficiência em inglês acadêmico, aplicado via lápis-e-papel, em um teste adaptativo informatizado (TAI-PI) baseado em um modelo da Teoria de Resposta ao Item (TRI). O exame é com- posto por itens de múltipla escolha administrados segundo o método de Medida de Probabilidade Admi
TEMA (São Carlos). Publicado em: 16/09/2019
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2. Eggshell Qualities as Indicative of Eggshell Strength for Layer Selection
ABSTRACT The study aimed at investigating which of four traits is the most representative of eggshell strength (destructive eggshell thickness measurement, eggshell weight, egg specific gravity, ultrasonic measurement of eggshell thickness) and could be used for selection purposes. To date, investigations focused mostly on pairwise (eggshell strength vs. ano
Rev. Bras. Cienc. Avic.. Publicado em: 2018-03
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3. Genome-wide association study for birth, weaning and yearling weight in Colombian Brahman cattle
Abstract Genotypic and phenotypic data of 1,562 animals were analyzed to find genomic regions that potentially influence the birth weight (BW), weaning weight at seven months of age (WW) and yearling weight (YW) of Colombian Brahman cattle, with genotyping conducted using Illumina Bead chip array with 74,669 SNPs. A Single Step Genomic BLUP (ssGBLP), approac
Genet. Mol. Biol.. Publicado em: 22/05/2017
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4. Genetic parameters in female reproductive traits of Nile tilapia (Oreochromis niloticus)
ABSTRACT Genetic parameters for reproductive traits in female Nile tilapia were estimated in this study using Bayesian inference method. The data set presented information from 451 Nile tilapia females that were evaluated at two different places in Maringá - Paraná - Brazil (hapas of 1 and 10 m³) and at one location in Alfenas - Minas Gerais - Brazil. A s
An. Acad. Bras. Ciênc.. Publicado em: 2017
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5. Value of genomics in breeding objectives for beef cattle
ABSTRACT The objective of this research was to discern the contribution of genomic information to multiple-trait breeding objectives and thus understand the economic value of that information. True genetic values were simulated for each of n, possibly correlated, traits. These true genetic values, combined with uncorrelated random noise, resulted in both gen
R. Bras. Zootec.. Publicado em: 2016-12
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6. Mapeamento Bayesiano de múltiplos caracteres: efeitos pleiotrópicos no estudo da herança dos componentes da produção em milho / Bayesian mapping of multiple traits: pleiotropic effects in studying the inheritance of yield components in maize
Pleiotropy has played an important role in understanding quantitative traits. However, the extensiveness of this effect in the genome and its consequences for plant improvement have not been fully elucidated. The aim of this study was to identify pleiotropic quantitative trait loci (QTL) in maize using Bayesian multiple interval mapping. Additionally, we sou
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/01/2012
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7. Parâmetros genéticos para características lineares de tipo e produtivas em vacas da raça holandesa no Brasil / Genetic parameters for linear type and yield traits in holstein cows in brazil
The objective of this study was to estimate genetic and phenotypic parameters for 21 linear type traits over the final score and milk yield traits (MY), fat (FY) and protein (PP) in herds of Holstein dairy cattle in Brazil. The 18,500 records used in this study were collected by staff of the Brazilian Association of Cattle Breeders of Holstein between 1994 a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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8. Genotype by environment interaction in Nelore cattle from five Brazilian states
Records from 75,941 Nelore cattle were used to determine the importance of genotype by environment interaction (GEI) in five Brazilian states. (Co)variance components were estimated by single-trait analysis (with yearling weight, W450, considered to be the same trait in all states) and multiple-trait analysis (with the record from each state considered to be
Genetics and Molecular Biology. Publicado em: 08/07/2011
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9. Eficiencia de indices de selecao na identificacao de clones superiores de batata.
A maioria dos melhoristas, analiticos ou intuitivos, praticam selecao para multiplas caracteristicas no desenvolvimento de cultivares. O objetivo deste trabalho foi avaliar metodos de selecao na identificacao de clones de batata (Solanum tuberosum L.) produtivos, com elevados percentuais de tuberculos graudos, boa aparencia geral de tuberculos e alta densida
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
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10. Mapping QTLs for traits associated with biological nitrogen fixation (BNF) in soybeans / Mapeamento de QTLs para caracteres relacionados com a fixação biológica de nitrogênio (FBN) em soja
Soybeans [Glycine max (L.) Merrill] is a crop with high protein content (about 40%) in the seeds. As a result, the crop demands high nitrogen (N) inputs, which can be supplied by the process of biological nitrogen fixation (BNF), through the symbiosis with bacteria of the genus Bradyrhizobium. In Brazil the BNF allows to fulfill all the demand for N; therefo
Publicado em: 2010
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11. Bayesian inference in genetic parameter estimation of visual scores in Nellore beef-cattle
The aim of this study was to estimate the components of variance and genetic parameters for the visual scores which constitute the Morphological Evaluation System (MES), such as body structure (S), precocity (P) and musculature (M) in Nellore beef-cattle at the weaning and yearling stages, by using threshold Bayesian models. The information used for this was
Genetics and Molecular Biology. Publicado em: 17/07/2009
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12. Estudo da herança dos caracteres stay-green, produção e seus componentes em milho utilizando o delineamento III e mapeamento de QTL / Inheritance study of stay-green, yield and its components in maize using the design III and QTL mapping
Maize is one of the most important agricultural activities in Brazil. The country is the third largest world producer and the yield rose from 1800 kg ha-1 to 3000 kg ha-1 in the last 15 years. The grain yield and drought tolerance are complex traits, difficult to select. A possibility to increase the efficiency of breeding programs that aims to improve the g
Publicado em: 2009