Genetic And Environmental Correlations
Mostrando 13-24 de 69 artigos, teses e dissertações.
-
13. Use of orthogonal functions in random regression models in describing genetic variance in Nellore cattle
A total of 204,912 records of birth weights up to 550 days of age, of 24,890 Nellore cattle, offspring of 375 sires and 16,917 dams from five herds in the state of Mato Grosso, Brazil, were used in order to describe the variability of the weight development by random regression models. The model evaluated as the most suitable used the covariance function of
R. Bras. Zootec.. Publicado em: 2013-04
-
14. Effect of environmental factors on performance of purebred and crossbred Santa Inês lambs from birth to 154 days of age
The objectives of this study were to evaluate the environmental effects (age of dam at lambing, type of birth and sex of lamb) and genetic groups (Santa Inês and ½ Santa Inês) on weight and morphometric measurements (heart girth, body length and height) of lambs; to test linear and allometric regressions to predict the weight through the measurements; and
R. Bras. Zootec.. Publicado em: 2013-02
-
15. Genetic and environmental influences on blood pressure and physical activity: a study of nuclear families from Muzambinho, Brazil
Blood pressure (BP) and physical activity (PA) levels are inversely associated. Since genetic factors account for the observed variation in each of these traits, it is possible that part of their association may be related to common genetic and/or environmental influences. Thus, this study was designed to estimate the genetic and environmental correlations o
Braz J Med Biol Res. Publicado em: 2012-12
-
16. Genetic parameters and relationships between heifers rebreeding and hip height in Nellore cattle
The objective of this study was to estimate heritability and verify the genetic correlations between heifers subsequent rebreeding with weaning hip height (WHH) and yearling hip height (YHH), using Bayesian inference. The (co)variance components and genetic parameters were estimated using an animal nonlinear (threshold) model for subsequent rebreeding and an
Revista Brasileira de Zootecnia. Publicado em: 2012-03
-
17. Relação do hábito alimentar e polimorfismos da MTHFR C677T com a instabilidade genômica em fumicultores gaúchos
Genetic damage can occur spontaneously under normal metabolic circumstances and can also be present in situations of dietary deficiency or inadequate intake of nutrients and excessive exposure to environmental mutagens. The purpose of this study was to evaluate the influence of the intake of micronutrients B12, B6 and folate and of polymorphism MTHFR C677T i
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
-
18. Estudo das alteraÃÃes hematolÃgicas, bioquÃmicas e genotÃxicas induzidas por agrotÃxicos em agricultores do estado do Piauà / STUDY OF POSSIBLE GENETIC CHANGES INDUCED BY PESTICIDES IN FARMERS IN THE STATE OF PIAUÃ
Exposure to pesticides represents a potential risk to human health. In addition to poisoning, these compounds may interact with DNA, causing degenerative diseases, including cancer. The risk assessment for pesticides was conducted in the municipalities of Picos, Piripiri, Barras and Josà de Freitas with farm workers (exposed group) and 55 administrative off
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/09/2011
-
19. Mapeamento de QTLs em múltiplos caracteres e ambientes em cruzamento comercial de cana-de-açucar usando modelos mistos / Multi-trait multi-environment QTL mapping in a sugarcane commercial cross using mixed models
Dados coletados de experimentos de melhoramento geralmente contêm observações fenotípicas para vários caracteres avaliados em múltiplos ambientes. Especificamente para cana-de-açúcar, medidas repetidas são obtidas para cana-planta e uma ou mais socas. Tal cenário presta-se naturalmente ao uso de modelos mistos para modelagem de variâncias genétic
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/08/2011
-
20. Estudo da produção de leite de caprinos utilizando modelos de regressão aleatória / Study of goat milk production using random regression models
Data from the herd of goat industry, Federal University of Viçosa were used to evaluate the factors that influence milk production on the control (PLDC) and content of the Milk constituents (percentages of protein, fat, lactose and total solids in days of collection) in dairy goats fitness, define the best model of random regression using Legendre polynomia
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/07/2011
-
21. Desempenho de 79 progênies de soja na geração F6 e correlações fenotípicas, genotípicas e ambientais / Performance of 79 soybean progeny of F6 generation and their phenotypic, genotypic and environmental correlations
Soybean farmers have interest on increasingly early highly productive cultivars has stimulated the development of new genotypes for breeding soy programs. So that, this study aimed to evaluate the agronomic characteristics of 79 progenies of ten biparental crosses Program Soybean Breeding in Federal University of Uberlândia. The experiment was conducted at
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/06/2011
-
22. Heterogeneity of linalool chemotypes of Lippia alba (Mill.) N.E.Br., based on clonal half-sib progenies
Lippia alba (Mill.) N.E.Br. is an aromatic and medicinal shrub native to the American continent. Despite its potential as a source of essential oil for the pharmaceutical and cosmetics industries, few selection and genetic improvement studies have been carried out. The aim of this study was to provide genetic information on this species for breeding programs
Scientia Agricola. Publicado em: 2011-08
-
23. Genetic analyses of days to calving their relationships with other traits in a Canchim herd.
Heritabilities and genetic correlations in a Canchim beef cattle herd were estimated using data on the following traits: male scrotal circumference at twelve months (SC12); days to first calving (DFC) for heifers; days to calving (DC) for cows; male and female weight (W) at twelve months (W12); heifer weight at the start of the first breeding season (WFBS) a
Genetics and Molecular Biology. Publicado em: 2011
-
24. Combining ability of maize grain yield under different levels of environmental stress.
Abstract ? The objectives of this work were to caracterize the tropical maize germplasm and to compare the combining abilities of maize grain yield under different levels of environmental stress. A diallel was performed among tropical maize cultivars with wide adaptability, whose hybrid combinations were evaluated in two sowing dates, in two years. The signi
Pesquisa Agropecuária Brasileira. Publicado em: 2011