Inbreeding effects on postweaning production traits, conformation, and calving performance in Irish beef cattle

2008 ◽  
Vol 86 (12) ◽  
pp. 3338-3347 ◽  
Author(s):  
S. Mc Parland ◽  
J. F. Kearney ◽  
D. E. MacHugh ◽  
D. P. Berry
Keyword(s):  
Beef Cattle ◽  
Production Traits ◽  
Calving Performance

scholarly journals Candidate genes for production traits in Nelore beef cattle

2012 ◽  
Vol 11 (4) ◽  
pp. 4138-4144 ◽  
Author(s):  
P.C. Tizioto ◽  
S.L. Meirelles ◽  
R.R. Tulio ◽  
A.N. Rosa ◽  
M.M. Alencar ◽  
...  
Keyword(s):  
Beef Cattle ◽  
Candidate Genes ◽  
Production Traits

scholarly journals Combining multi-OMICs information to identify key-regulator genes for pleiotropic effect on fertility and production traits in beef cattle

PLoS ONE ◽  
2018 ◽  
Vol 13 (10) ◽  
pp. e0205295 ◽  
Author(s):  
Pablo Augusto de Souza Fonseca ◽  
Samir Id-Lahoucine ◽  
Antonio Reverter ◽  
Juan F. Medrano ◽  
Marina S. Fortes ◽  
...  
Keyword(s):  
Beef Cattle ◽  
Pleiotropic Effect ◽  
Production Traits ◽  
Regulator Genes

Genetic changes in ruminants: Historic trends and future prospects

2000 ◽  
Vol 27 ◽  
pp. 29-38
Author(s):  
Brian McGuirk
Keyword(s):  
Beef Cattle ◽  
Disease Incidence ◽  
Dairy Industry ◽  
Progeny Testing ◽  
Production Traits ◽  
Genetic Progress ◽  
Genetic Changes ◽  
Frozen Semen ◽  
Type Traits ◽  
Cattle And Sheep

AbstractThe major ruminant species, dairy and beef cattle and sheep, represent a rather heterogeneous group as regards genetic improvement, which to a large extent reflects their respective breeding structures. In the UK, the beef cattle and sheep industries still span many different breeds, have small herds/flocks, and have been relatively unaffected by agribusiness investment, and are assumed to have a traditional pyramid breeding structure, in which progress is determined by a small number of breeders. Recording of production information, which to date has focussed on terminal sire characteristics, is relatively recent, and until the use of across herd evaluations, genetic progress was probably limited. However in recent years there have been gains in both growth and muscling. There is little evidence or concern for undesired consequences in commercial flocks, partly because of the extensive use of crossbreeding in these industries, which exploits both breed complementarity and heterosis.By contrast, the dairy industry is now dominated by purebred Holsteins. Increasingly breeding activities are both global in scope and dominated by a small number of large breeding companies. Because most traits of interest are only expressed in the female, improvement programmes have continued to focus on progeny testing, with test daughters in many herds. Most recording schemes and promotional activities emphasise production and type traits. The dairy industry is also notable for the publication of bull progeny test results, so that top bulls can then be used as sires of the next generation of by all companies. These bull evaluations now extend to international rankings.Data from the US indicates continuing genetic progress for production traits in the Holstein, particularly since the 1960s, by when progeny testing had been established, frozen semen widely used, and adequate statistical procedures in place for evaluating bulls. Genetic progress is also evident for type traits. There is now growing concern and evidence of undesirable genetic changes in fertility, disease incidence and overall stress, despite improved nutrition and general management. Altering this situation will require both the recording of such traits and the use of that information by breeding companies, especially in sire selection.

scholarly journals A single nucleotide polymorphism in NEUROD1 is associated with production traits in Nelore beef cattle

2016 ◽  
Vol 15 (2) ◽  
Author(s):  
P.S.N. de Oliveira ◽  
P.C. Tizioto ◽  
W. Malago Jr ◽  
M.L. do Nascimento ◽  
A.S.M. Cesar ◽  
...  
Keyword(s):  
Single Nucleotide Polymorphism ◽  
Beef Cattle ◽  
Production Traits ◽  
Nucleotide Polymorphism ◽  
Single Nucleotide

Effects of production and marketing circumstances on economic values for beef production traits

1998 ◽  
Vol 78 (1) ◽  
pp. 47-55 ◽  
Author(s):  
K. R. Koots ◽  
J. P. Gibson
Keyword(s):  
Beef Cattle ◽  
Key Words ◽  
Production System ◽  
Economic Value ◽  
Fixed Costs ◽  
Production Traits ◽  
Beef Production ◽  
Fixed Amount ◽  
Economic Values ◽  
Mature Size

The effect of altering production and marketing circumstances on economic values is quantified for a complete beef production system. Absolute and relative economic values were found to vary substantially with large, but realistic fluctuations in prices and costs. In addition, several examples of different management and different genotypes gave markedly different economic values than in the base situation. Also investigated were the effects of rescaling the enterprise to accommodate three alternative limitations; fixed feed available from pasture, fixed dollars available for feed or fixed amount of beef produced. The effects of rescaling were highly dependent on whether or not fixed costs were accounted for. When fixed costs were ignored (corresponding to a small positive profit) the economic value for mature size decreased while that for fertility increased, but other traits were largely unaffected by rescaling. Overall, production circumstances that reduced survival and fertility yielded the largest changes to economic values. Key words: Economic values, beef cattle, rescaling

479 Determining Effects of Residual Feed Intake on Economically Important Production Traits in Crossbreed Beef Cattle.

2018 ◽  
Vol 96 (suppl_2) ◽  
pp. 256-257
Author(s):  
S A Hershorin ◽  
R Manjarin ◽  
A M Emond ◽  
S Id-Lahoucine ◽  
P Fonseca ◽  
...  
Keyword(s):  
Beef Cattle ◽  
Feed Intake ◽  
Residual Feed Intake ◽  
Production Traits

scholarly journals Runs of homozygosity analysis reveals consensus homozygous regions affecting production traits in Chinese Simmental beef cattle

BMC Genomics ◽  
2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Guoyao Zhao ◽  
Yuqiang Liu ◽  
Qunhao Niu ◽  
Xu Zheng ◽  
Tianliu Zhang ◽  
...  
Keyword(s):  
Beef Cattle ◽  
Candidate Genes ◽  
Average Length ◽  
Snp Array ◽  
Reproductive Traits ◽  
Farm Animals ◽  
Production Traits ◽  
Runs Of Homozygosity ◽  
Exact Test ◽  
Genomic Regions

Abstract Background Genomic regions with a high frequency of runs of homozygosity (ROH) are related to important traits in farm animals. We carried out a comprehensive analysis of ROH and evaluated their association with production traits using the BovineHD (770 K) SNP array in Chinese Simmental beef cattle. Results We detected a total of 116,953 homozygous segments with 2.47Gb across the genome in the studied population. The average number of ROH per individual was 99.03 and the average length was 117.29 Mb. Notably, we detected 42 regions with a frequency of more than 0.2. We obtained 17 candidate genes related to body size, meat quality, and reproductive traits. Furthermore, using Fisher’s exact test, we found 101 regions were associated with production traits by comparing high groups with low groups in terms of production traits. Of those, we identified several significant regions for production traits (P < 0.05) by association analysis, within which candidate genes including ECT2, GABRA4, and GABRB1 have been previously reported for those traits in beef cattle. Conclusions Our study explored ROH patterns and their potential associations with production traits in beef cattle. These results may help to better understand the association between production traits and genome homozygosity and offer valuable insights into managing inbreeding by designing reasonable breeding programs in farm animals.

Phenotypic relationships among methane production traits assessed under ad libitum feeding of beef cattle

2017 ◽  
Vol 0 (0) ◽  
pp. 0
Author(s):  
T. Bird-Gardiner ◽  
P. F. Arthur ◽  
I. M. Barchia ◽  
K. A. Donoghue ◽  
R. M. Herd
Keyword(s):  
Beef Cattle ◽  
Methane Production ◽  
Production Traits ◽  
Ad Libitum ◽  
Ad Libitum Feeding

scholarly journals Effects of CSN3 and LGB gene polymorphisms on production traits in beef cattle

2005 ◽  
Vol 28 (2) ◽  
pp. 262-266 ◽  
Author(s):  
Rogério A. Curi ◽  
Henrique N. de Oliveira ◽  
Marcos A. Gimenes ◽  
Antonio C. Silveira ◽  
Catalina R. Lopes
Keyword(s):  
Beef Cattle ◽  
Gene Polymorphisms ◽  
Production Traits
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