Selection for feed efficiency does not change the selection for growth and carcass traits in Nellore cattle

2019 ◽  
Vol 136 (6) ◽  
pp. 464-473
Author(s):  
Giovanna Faria Moraes ◽  
Luíza Rodrigues Alves Abreu ◽  
Fabio Luiz Buranelo Toral ◽  
Isabel Cristina Ferreira ◽  
Henrique Torres Ventura ◽  
...  
Keyword(s):  
Feed Efficiency ◽  
Carcass Traits ◽  
Nellore Cattle ◽  
Selection For

scholarly journals Phenotypic and Genetic Correlations of Feed Efficiency Traits with Growth and Carcass Traits in Nellore Cattle Selected for Postweaning Weight

PLoS ONE ◽  
2016 ◽  
Vol 11 (8) ◽  
pp. e0161366 ◽  
Author(s):  
Thais Matos Ceacero ◽  
Maria Eugênia Zerlotti Mercadante ◽  
Joslaine Noely dos Santos Gonçalves Cyrillo ◽  
Roberta Carrilho Canesin ◽  
Sarah Figueiredo Martins Bonilha ◽  
...  
Keyword(s):  
Feed Efficiency ◽  
Carcass Traits ◽  
Genetic Correlations ◽  
Nellore Cattle

Economic values of reproductive, growth, feed efficiency and carcass traits in Nellore cattle

2021 ◽  
Author(s):  
Flávia M. Souza ◽  
Fernando B. Lopes ◽  
Guilherme J. M. Rosa ◽  
Cláudio U. Magnabosco
Keyword(s):  
Feed Efficiency ◽  
Carcass Traits ◽  
Reproductive Growth ◽  
Economic Values ◽  
Nellore Cattle

scholarly journals Correlations of visual scores, carcass traits, feed efficiency and retail product yield in Nellore cattle

2014 ◽  
Vol 71 (1) ◽  
pp. 17-22 ◽  
Author(s):  
Paulo Henrique Cancian ◽  
Rodrigo da Costa Gomes ◽  
Fernando Ricardo Manicardi ◽  
Andrea Cristina Ianni ◽  
Marina de Nadai Bonin ◽  
...  
Keyword(s):  
Feed Efficiency ◽  
Carcass Traits ◽  
Product Yield ◽  
Nellore Cattle

scholarly journals Feedlot performance, feed efficiency and carcass traits in Nellore cattle selected for postweaning weight

2013 ◽  
Vol 42 (2) ◽  
pp. 125-129 ◽  
Author(s):  
Tatiana Lucila Sobrinho ◽  
Sarah Figueiredo Martins Bonilha ◽  
Heraldo Cesar Gonçalves ◽  
André Michel de Castilhos ◽  
Elaine Magnani ◽  
...  
Keyword(s):  
Feed Efficiency ◽  
Carcass Traits ◽  
Feedlot Performance ◽  
Nellore Cattle

scholarly journals Effects of sire line, birth weight and sex on growth performance and carcass traits of crossbred pigs under standardized environmental conditions

2020 ◽  
Vol 63 (2) ◽  
pp. 367-376
Author(s):  
Kathrin Elbert ◽  
Neal Matthews ◽  
Ralf Wassmuth ◽  
Jens Tetens
Keyword(s):  
Birth Weight ◽  
Growth Performance ◽  
Meat Quality ◽  
Feed Efficiency ◽  
Carcass Traits ◽  
Final Body Weight ◽  
Selection For ◽  
And Gender ◽  
Terminal Sire ◽  
Crossbred Pigs

Abstract. A variety of available terminal sire lines makes the choice of terminal sire line complex for the pig producer. Higher birth weights are important for subsequent growth performance and selection for this trait is also necessary in sire lines. The aim was to investigate the effect of sire line, birth weight and gender on growth performance, carcass traits and meat quality. In total 3844 crossbred pigs from Camborough Pig Improvement Company (PIC) dams matched with either a Synthetic (A) or Piétrain (B) sire line were used. Pigs from line A grew faster (p<0.01), showed higher feed intake (p<0.01) and reached a higher final body weight (p≤0.01), but they had a similar efficiency (p=0.179). Leaner carcasses and heavier primal cuts (p<0.001) were observed in pigs from line B. Carcasses from pigs sired by line A had higher meat quality (p<0.001). Males had a higher growth rate (p≤0.05) but had a poorer feed efficiency (p<0.01). Heavier birth weight pigs and females had leaner, higher value carcasses with heavier primal cuts (p<0.001) compared to middle and low birth weight females or males. Sire line by sex interactions was significant for growth (p≤0.05) and carcass traits (p<0.001). Interaction between sire line and birth weight classes were only detected for loin depth (p<0.01). Line A is preferable if the numbers of fatting pigs per fattening place and year should be improved, and line B is an option to increase leanness and carcass primal cuts.

scholarly journals Genetic analysis of residual feed intake adjusted for fat and carcass and performance traits in a Nellore herd

2017 ◽  
Vol 47 (2) ◽  
Author(s):  
Giovanna Faria de Moraes ◽  
Luiza Rodrigues Alves Abreu ◽  
Isabel Cristina Ferreira ◽  
Idalmo Garcia Pereira
Keyword(s):  
Feed Intake ◽  
Feed Efficiency ◽  
Carcass Traits ◽  
Residual Feed Intake ◽  
Genetic Evaluation ◽  
Phenotypic Correlation ◽  
Performance Traits ◽  
Fat Thickness ◽  
Selection For ◽  
And Performance

ABSTRACT: The study of the genetic evaluation of residual feed intake adjusted for fat (RFIFat) is important for the appropriate use of feed efficiency in selection programs. The objective was to analyze the influence of selection for RFIF at on carcass and performance traits by estimating various genetic parameters. Data were analyzed from five tests of feed efficiency, which were conducted with 677 Nellore males. Genetic evaluation was performed by Bayesian inference using an animal model via single- and two-trait analyses. Variables analyzed were dry matter intake, average daily gain, RFIFat, rib eye area, back fat thickness, rump fat thickness, marbling score, and subcutaneous fat thickness. The posterior mean distributions estimated at each analysis were used to estimate heritability of the traits and to perform various correlations. The studied traits showed high heritability estimates, and they should respond well to selection. The RFIFat presented a phenotypic correlation with carcass traits (which was next to zero), and there was also a negative genetic correlation. Additive genetic variability for RFIFat showed that selection for this trait can promote genetic gains in future generations, resulting in animals that are efficient in terms of nutrient use, and according to the genetic and phenotypic correlations, with no significant negative changes to carcass traits.

scholarly journals Genetic parameters and response to selection for post-weaning weight gain, visual scores and carcass traits in Hereford and Hereford×Nellore cattle

2011 ◽  
Vol 137 (1-3) ◽  
pp. 231-237 ◽  
Author(s):  
Fábio Luiz Buranelo Toral ◽  
Vanerlei Mozaquatro Roso ◽  
Cláudio Vieira de Araújo ◽  
João Cruz Reis Filho
Keyword(s):  
Weight Gain ◽  
Genetic Parameters ◽  
Carcass Traits ◽  
Response To Selection ◽  
Weaning Weight ◽  
Nellore Cattle ◽  
Selection For

scholarly journals Effect of dietary protein content on performance, feed efficiency and carcass traits of feedlot Nellore and Angus × Nellore cross cattle at different growth stages

2018 ◽  
Vol 156 (1) ◽  
pp. 110-117 ◽  
Author(s):  
P. M. Amaral ◽  
L. D. S. Mariz ◽  
D. Zanetti ◽  
L. F. Prados ◽  
M. I. Marcondes ◽  
...  
Keyword(s):  
Feed Efficiency ◽  
Average Daily Gain ◽  
Carcass Traits ◽  
Subcutaneous Fat ◽  
Experimental Period ◽  
Growth Stages ◽  
Linear Effect ◽  
Randomized Design ◽  
Nellore Cattle ◽  
Two Stages

AbstractAn experiment was conducted to evaluate whether a reduction in dietary crude protein (CP) and genotype affects animal performance, feed efficiency and carcass traits of beef cattle at different stages of the feedlot. Twenty-two Nellore and 22 crossbred F1 Angus × Nellore (Nellore: 8 months, initial body weight (iBW) = 212.7 kg; Crossbred: 8 months, iBW = 226.1 kg) were used in this experiment. The experiment was conducted in a complete randomized design with six replicates, in a 2 × 3 factorial design. The factors were two genotypes (Nellore and Crossbred) and three CP concentrations (100, 120 and 140 g/kg dry matter [DM]). The experimental period lasted 224 day, being divided into two stages (Backgrounding = 112 day, and Finishing = 112 day). At the end of the experiment, all animals were slaughtered to evaluate their carcass characteristics. Similar patterns were observed during backgrounding and finishing phases on intake and average daily gain (ADG) regarding genotype. Intakes of DM, organic matter, CP, neutral detergent fibre, non-fibre carbohydrates and total digestible nutrients, ADG (kg/day) and feed efficiency were greater in Crossbred animals than Nellore in both phases. During the backgrounding phase, dietary CP did not influence DM intake. However, a linear effect of CP on ADG was observed in the backgrounding phase. During finishing, Nellore cattle fed 100 g CP/kg DM presented lower ADG than Nellore fed 120 and 140 g CP/kg DM. Crossbred animals were heavier than Nellore at the beginning and end of the trial. Crossbred animals also gained more carcass, retained more CP and fat, and had a greater subcutaneous fat thickness during the experiment compared with Nellore. There was a quadratic effect of dietary CP on retained CP and dressing. The current study found that crossbred animals (F1 Angus × Nellore) not only had greater performance, but also better carcass traits compared with Nellore, representing an option for increasing productivity. Also, it is possible to adjust diets according to phase. During the backgrounding stage, 140 g CP/kg DM should be used, being reduced to 120 g CP/kg DM during the finishing stage of feedlot for Nellore and to 100 g CP/kg DM for Crossbred, without affecting performance adversely.

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