scholarly journals The Effects of Estrogen Receptor Locus on Reproductive Tracts Components and Performance Traits in Large White×Meishan F2 Offspring

2004 ◽  
Vol 17 (9) ◽  
pp. 1223-1226 ◽  
Author(s):  
Li Fenge ◽  
Lei Minggang ◽  
Zheng Rong ◽  
Zuo Bo ◽  
Jiang Siwen ◽  
...  
Keyword(s):  
Estrogen Receptor ◽  
Large White ◽  
Receptor Locus ◽  
Performance Traits ◽  
And Performance

Evaluation of performance traits in European Meishan pig crosses with varying Oestrogen Receptor (ESR) genotypes

1997 ◽  
Vol 1997 ◽  
pp. 28-28
Author(s):  
O.I. Southwood ◽  
H.A.M. van der Steen
Keyword(s):  
Litter Size ◽  
Significant Relationship ◽  
Oestrogen Receptor ◽  
Large White ◽  
Positive Allele ◽  
Evaluation Of Performance ◽  
Performance Traits ◽  
And Performance ◽  
Meishan Pig ◽  
Esr Gene

A significant relationship between the ESR gene and litter size has been reported for a range of Meishan synthetic and Large White lines (Rothschild et al., 1995). The effect of one copy of the positive (B) allele in a European 50% Chinese Meishan synthetic (L93) was estimated as +0.79 pigs born alive per litter in the first parity (Southwood et al, 1995). It is therefore of interest to incorporate the positive allele into a comercial parent gilt, the growing performance and soundness of these animals also being of importance. The objective of this trial was to evaluate the effect of the ESR gene on growth and performance traits in a commercial type background.

scholarly journals Association of the estrogen receptor gene Pvu II restriction polymorphism with expected progeny differences for reproductive and performance traits in swine herds in Brazil

2006 ◽  
Vol 29 (2) ◽  
pp. 273-277 ◽  
Author(s):  
Bárbara Amélia Aparecida Santana ◽  
Fernando H. Biase ◽  
Robson Carlos Antunes ◽  
Mauricio Borges ◽  
Mauricio Machaim Franco ◽  
...  
Keyword(s):  
Estrogen Receptor ◽  
Receptor Gene ◽  
Estrogen Receptor Gene ◽  
Performance Traits ◽  
Restriction Polymorphism ◽  
And Performance ◽  
Swine Herds ◽  
Expected Progeny Differences

scholarly journals Beak Trimming and Sex Effects on Behavior and Performance Traits of Large White Turkeys

1992 ◽  
Vol 71 (10) ◽  
pp. 1606-1614 ◽  
Author(s):  
D.L. CUNNINGHAM ◽  
R.J. BUHR ◽  
M. MAMPUTU
Keyword(s):  
Large White ◽  
Sex Effects ◽  
Performance Traits ◽  
And Performance ◽  
Beak Trimming

scholarly journals Bayesian inference of genetic parameters for reproductive and performance traits in White Leghorn hens

2018 ◽  
Vol 63 (No. 6) ◽  
pp. 230-236 ◽  
Author(s):  
J.O. Rosa ◽  
G.C. Venturini ◽  
T.C.S. Chud ◽  
B.C. Pires ◽  
M.E. Buzanskas ◽  
...  
Keyword(s):  
Bayesian Inference ◽  
Fixed Effects ◽  
Egg Production ◽  
Genetic Parameters ◽  
Laying Hens ◽  
Reproductive Traits ◽  
A Posteriori ◽  
White Leghorn ◽  
Performance Traits ◽  
And Performance

This study estimated the genetic parameters for reproductive and performance traits and determined which ones can be used as selection criteria for egg production in laying hens using the Bayesian inference. The data of 1894 animals from three generations of White Leghorn laying hens were analyzed for fertility (FERT), hatchability (HATC), and birth rate measurements at 60 weeks of age (BIRTH), body weight at 16 and 60 weeks of age (BW16 and BW60), age at sexual maturity (ASM), egg height/width ratio, weight, and density at 28, 36, and 40 weeks of age (RHW28, RHW36, RHW40, WEGG28, WEGG36, WEGG40, DENS28, DENS36, and DENS40, respectively) traits. The genetic parameters were estimated by the Bayesian inference method of multi-trait animal model. The model included the additive and residual genetic random effects and the fixed effects of generation. The a posteriori mean distributions of the heritability estimates for reproductive traits ranged from 0.14 ± 0.003 (HATC) to 0.22 ± 0.005 (FERT) and performance from 0.07 ± 0.001 (RHW28) to 0.42 ± 0.001 (WEGG40). The a posteriori mean distributions of the genetic correlation between reproductive traits ranged from 0.18 ± 0.026 (FERT and HACT) to 0.79 ± 0.007 (FERT and BIRTH) and those related to performance ranged from –0.49 ± 0.001 (WEGG36 and DENS36) to 0.75 ± 0.003 (DENS28 and DENS36). Reproductive and performance traits showed enough additive genetic variability to respond to selection, except for RHW28. This trait alone would have little impact on the genetic gain because environmental factors would have a higher impact compared to those from the additive genetic factors. Based on the results of this study, the selection applied on the BIRTH trait can be indicated to improve FERT and HATC of eggs. Furthermore, the use of the WEGG40 could improve egg quality in this population.

scholarly journals Breeding techniques to form final parent groups of sows (F1) with a high adaptive ability

2020 ◽  
Vol 58 (2) ◽  
pp. 185-198
Author(s):  
R. I. Sheiko ◽  
I. N. Kazarovets
Keyword(s):  
Pork Production ◽  
Individual Assessment ◽  
Innovative Methodology ◽  
Performance Traits ◽  
Parent Groups ◽  
Breeding Animal ◽  
And Performance ◽  
Adaptive Ability ◽  
Initial Forms ◽  
Breeding Techniques

Global experience related to increased pork production shows that breeding work has become an integral part of the technology, since it is impossible to further improve breeding and performance traits of animals without it and therefore the greater production of better quality pork. The paper presents the results of the breeding process arrangement for creation of F1 parental pig. Substantiation of breeding techniques when creating the final parental groups of sows (F1) with a high adaptive ability was based on complex methods to evaluate breeding animals, including traditional methods of domestic breeding and breeding indices. Evaluation of combination compatibility of breed-linear hybrids with the use of breeding indices during mating of parent initial forms allows to determine efficiency of using Yorkshire sows with Landrace boars, and Landrace sows with Yorkshire boars (final parental sows (F1)), which had significantly better reproductive indicators in comparison with BLW х BM genotype sows. Particularly efficient compatibility was recorded when selecting Yorkshire sows and Landrace boars. It was determined that in modern conditions an increase in the efficiency of breeding and pedigree work in pig breeding was based on the use of genetic methods, including: individual assessment of pedigree species according to the main breeding traits, evaluation of genome of each breeding animal, and use of breeding indices allowing to identify the true genetic potential of animals and predict performance traits of their offspring. The research relevance lies in using the innovative methodology for comprehensive assessment of combination compatibility of parental pairs, unified for pig husbandries and pig farms, which will make it possible to 10% accelerate the breeding process of forming the final parental forms of sows, ensure obtaining offspring with predictable reproductive, fattening and meat traits, and good adaptive ability.

scholarly journals Simulation Study on the Integration of Health Traits in Horse Breeding Programs

Animals ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1153
Author(s):  
Lisa Büttgen ◽  
Johannes Geibel ◽  
Henner Simianer ◽  
Torsten Pook
Keyword(s):  
Osteochondrosis Dissecans ◽  
Selection Index ◽  
R Package ◽  
Breeding Value ◽  
Index Selection ◽  
Threshold Selection ◽  
Horse Breeding ◽  
Frequency Of Use ◽  
Performance Traits ◽  
And Performance

Osteochondrosis dissecans (OCD) is a degenerative disease of the cartilage leading to osseous fragments in the joints. It is important in horse breeding both from an animal welfare and an economic perspective. To study adequate breeding strategies to reduce OCD prevalence, a lifelike simulation of the breeding program of German Warmblood horses was performed with the R package MoBPS. We simulated complex breeding schemes of riding horses with different selection steps and realistic age structure, mimicking the German situation. As an example, osseous fragments in fetlock and hock joints were considered. Different scenarios, either using threshold selection, index selection or genomic index selection, respectively, were compared regarding their impact on health and performance traits. A rigorous threshold selection as well as the integration of OCD in a selection index at the stage of stallion licensing and chosen frequency of use in breeding cases on a selection index that includes breeding values for OCD traits performed best on a comparable level. Simply integrating OCD in this breeding value was less effective in terms of OCD reduction. Scenarios with a higher reduction of OCD also showed a slightly reduced improvement in the riding horse performance traits.

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