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| Machado,Mariana B.B.; Alencar,Maurício M.; Pereira,Andréa P.; Oliveira,Henrique N.; Casas,Eduardo; Coutinho,Luis L.; Regitano,Luciana C.A.. |
| The objective of this work was to identify QTLs for liveweight in a candidate region of bovine chromosome 5. Half-sib families from two lines, one traditional and the other new, of Canchim beef cattle (5/8 Charolais + 3/8 Zebu) were genotyped for four microsatellite markers, including the microsatellite in the IGF-1 (insulin-like growth factor-1) promoter region. Significant differences in allele distribution between the two lines were found for three markers. Interval mapping analyses in this region indicated the presence of a QTL controlling birth weight (p < 0.05) and of a QTL influencing breeding value for yearling weight (p < 0.01) in the newer line of the breed. The previously identified interaction between the IGF-1 genotype and genetic group... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: QTL; Growth traits; Microsatellite; Bovine. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572003000300008 |
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| Liu,Yu; Duan,Xiaoyan; Chen,Si; He,Hua; Liu,Xiaolin. |
| Abstract Based on RNA-seq analysis, we recently found that the bovine NCAPG (non-SMC condensin I complex, subunit G) gene is differentially expressed during development of the longissimus muscle. In the present study, we validated this result and, using quantitative real-time PCR analysis, identified two adjacent genes, LCORL and DCAF16, that are more abundant in fetal muscle tissue; further analysis of tissue-specific expression patterns indicated high abundance of NCAPG in muscle. Since no polymorphisms were detected in a previous study of Qinchuan cattle, we extended our investigation to examine the occurrence of single-nucleotide polymorphisms (SNPs) in the NCAPG gene. Three SNPs, i.e., one located in the intron region (g47747: T > G), a synonymous... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Association analysis; Growth traits; Longissimus muscle; NCAPG expression; Single nucleotide polymorphism. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000400450 |
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| Miyata,Marcelo; Gasparin,Gustavo; Coutinho,Luiz Lehmann; Martinez,Mario Luiz; Machado,Marco Antonio; Silva,Marcos Vinicius G. Barbosa da; Campos,Ana Lucia; Sonstegard,Tad S.; Rosário,Millor Fernandes do; Regitano,Luciana Correia de Almeida. |
| Quantitative trait loci (QTL) mapping in livestock allows the identification of genes that determine the genetic variation affecting traits of economic interest. We analyzed the birth weight and weight at 60 days QTL segregating on bovine chromosome BTA14 in a F2 resource population using genotypes produced from seven microsatellite markers. Phenotypes were derived from 346 F2 progeny produced from crossing Bos indicus Gyr x Holstein Bos taurus F1 parents. Interval analysis to detect QTL for birth weight revealed the presence of a QTL (p < 0.05) at 1 centimorgan (cM) from the centromere with an additive effect of 1.210 ± 0.438 kg. Interval analysis for weight at 60 days revealed the presence of a QTL (p < 0.05) at 0 cM from the centromere with an... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: TA14; Cattle; F2; Growth traits; Molecular markers; QTL. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000300011 |
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| Faria,Carina Ubirajara de; Magnabosco,Cláudio de Ulhôa; Reyes,Arcadio de los; Lôbo,Raysildo Barbosa; Bezerra,Luiz Antônio Framartino; Sainz,Roberto Daniel. |
| The objective of this study was to estimate (co)variance components and genetic parameters for weights (W) and scrotal circumferences (SC) at 365 and 450 days of age, of Nelore (Bos indicus) cattle, using Bayesian inference in single and multiple-trait animal models. The fitted linear models included, besides the animal and residual random effects, the contemporary group (herd-year-season-sex-management group) and age-of-dam as "fixed effects". The analyses were carried out using a Gibbs sampler implemented through the MTGSAM program. The heritabilities (in parentheses) obtained fitting single-trait models were W365 (0.49), W450 (0.52), SC365 (0.68) and SC450 (0.66). Estimates of means, modes and medians for genetic parameters obtained from marginal... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bayesian inference; Growth traits; Genetic parameters. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000400007 |
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| Ghotbaldini, Hamidreza; Mohammadabadi, Mohammadreza; Nezamabadi-pour, Hossein; Babenko, Olena Ivanivna; Bushtruk, Maryna Vitaliivna; Tkachenko, Serhii Vasyliovych. |
| The present study aimed to apply artificial neural networks to predict the breeding values of body weight in 6-month age of Kermani sheep. For this purpose, records of 867 lambs including lamb sex, dam age, birth weight, weaning weight, age at 3-month (3 months old), age at 6-month (6 months old) and body weight at 3 months of age were used. Firstly, genetic parameters of the animals were estimated using ASReml software. The data was then pre-processed for using in MATLAB software. After initial experiments on the appropriate neural network architecture for body weight at 6-month age, two networks were examined. A feed-forward backpropagation multilayer perceptron (MLP) algorithm was used and 70% of all data used as training data, 15% as testing data and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal Science; Animal Genetics estimate; Genetic parameters; Growth traits; Lamb.. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/45282 |
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| Tamioso,Priscilla Regina; Cosmo,Tiago Rafael; Pimentel,Concepta Margaret McManus; Dias,Laila Talarico; Teixeira,Rodrigo de Almeida. |
| The aim of this study was to estimate the heritability for weight and height at withers of 260-780 days of age No Defined Breed (NDB) horses, at intervals of 40 days, which belong to the Brazilian Army cavalry. Thus, the model considered the direct genetic effects as random ones, as fixed, the effects of sex and year of birth and the linear effects of height at withers and age, as covariates for the analysis of body weight, whereas for the analysis of height, the linear effect of weight was included as a covariate. For the complete data, the estimated heritability coefficients were 0.40±0.034 and 0.70±0.019 for weight and height at withers, respectively, indicating that individual selection for these traits may be effective. On the other hand, for the data... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cavalry; Growth traits; Selection. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782012001200023 |
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