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Registros recuperados: 8
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Bayesian inference in a quantitative genetic study of growth traits in Nelore cattle (Bos indicus) Genet. Mol. Biol.
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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Genetic parameters estimation in King palm through a mixed mating system model Horticultura Brasileira
Bovi,Marilene L. A.; Resende,Marcos Deon V. de; Spiering,Sandra H..
Overestimation of the genetic parameters is common in palms due to the occurrence of geitonogamy and the absence of self-incompatibility mechanisms. Data from nursery grown Archontophoenix palms were utilized, assuming a mixed mating system including random cross-pollination and selfing at different rates. The objective was to show the importance of knowing the mating system predominant and define breeding strategies for that genus. Twenty-four King palm half sib families were evaluated at nursery conditions using a randomised complete block design, with nine replications and eleven plants per plot. Ten months after sowing, traits such as diameter, height, number of green leaves and length of the leaf sheath of the second leaf, were individually measured....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Archontophoenix; Alexander palm; Bangalow palm; Heritability; Selection; Growth traits.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362003000100020
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Heritability estimates for body weight and height at withers in Brazilian army horses Ciência Rural
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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NCAPG is differentially expressed during longissimus muscle development and is associated with growth traits in Chinese Qinchuan beef cattle Genet. Mol. Biol.
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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Predicting breeding value of body weight at 6-month age using Artificial Neural Networks in Kermani sheep breed Animal Sciences
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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QTL affecting body weight in a candidate region of cattle chromosome 5 Genet. Mol. Biol.
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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Quantitative trait loci (QTL) mapping for growth traits on bovine chromosome 14 Genet. Mol. Biol.
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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黒毛和種枝肉横断面の画像解析形質と発育性ならびに飼料利用性間の遺伝的関連性 OAK
大澤, 剛史; 日高, 智; 加藤, 浩二; 口田, 圭吾; Osawa, Takefumi; Hidaka, Satoshi; Kato, Koji; Kuchida, Keigo.
黒毛和種の発育形質,鈎料利用形質,枝肉格付形質およびロース芯の画像解析形質問の遺伝的関連性について分析した.分析には間接検定材料牛1,492頭を用いた.発育形質は,肥育開始時の体重や体高など6形質,飼料利用形質は,濃厚飼料摂取量や要求率など4形質,枝肉格付形質は, BMSナンバーなど6形質,画像解析形質は,“全体の粒子のあらさ"や“細かさ指数"など6形質を用いた. BMSナンバーと各発育形質および各飼料利用形質間で,低いあるいは無の遺伝相関(-0.13~0.16)が推定さ れたが,“全体の粒子のあらさ”および“細かさ指数”と各発育形質問の遺伝相関は,それぞれ0.17~0.37および-0.29~0.06が推定された.“全体の粒子のあらさ”および“細かさ指数”と濃厚飼料摂取量間の遺伝相関は,それぞれ0.41および-0.23が推定され,それらと要求率聞においては,それぞれ-0.16~-0.07および0.19~0.25が推定された. したがって,発育性や飼料効率が良い個体は,あらい脂肪交雑粒子が増加し,細かい脂肪交雑粒子が減少する遺伝的関連性が示唆された. The purpose of this study was to investigate the genetic relationships among growth traits,feed utilization traits carcass grading traits and image analysis traits in the ribeye of Japanese Black steers. In this analysis,1,492 Japanese Black steers in progeny testing were used. The...
Palavras-chave: Carcass traits; Feed utilization traits; Growth traits; Image analysis traits; Japanese Black.
Ano: 2008 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2313
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