scholarly journals Genetic parameters for carcass traits and body weight using a Bayesian approach in the Canchim cattle

2016 ◽  
Vol 15 (2) ◽  
Author(s):  
S.L.C. Meirelles ◽  
F.B. Mokry ◽  
A.C. Espasandín ◽  
M.A.D. Dias ◽  
M.M. Baena ◽  
...  
Keyword(s):  
Body Weight ◽  
Bayesian Approach ◽  
Genetic Parameters ◽  
Carcass Traits

Genetic parameters for growth and carcass traits of Japanese Black (Wagyu) cattle

2000 ◽  
Vol 71 (1) ◽  
pp. 59-64 ◽  
Author(s):  
T. Oikawa ◽  
T. Sanehira ◽  
K. Sato ◽  
Y. Mizoguchi ◽  
H. Yamamoto ◽  
...  
Keyword(s):  
Body Weight ◽  
Genetic Parameters ◽  
Growth Traits ◽  
Average Daily Gain ◽  
Carcass Traits ◽  
Genetic Correlations ◽  
Subcutaneous Fat ◽  
Marbling Score ◽  
Data Set ◽  
Pooled Data

AbstractRestricted maximum likelihood analyses fitting an animal model were conducted to estimate genetic parameters with a pooled-data set of performance tests (growth traits and food intake) on 661 bulls and progeny tests (growth traits and carcass traits) on 535 steers. Traits studied included concentrate intake (CONC), roughage intake (ROU), TDN conversion (TCNV), TDN intake (TINT) of bulls; rib eye area (REA), marbling score (MARB), dressing proportion (DRES) and subcutaneous fat depth (SCF) of steers. Body weight at start (BWS), body weight at finish (BWF) and average daily gain (ADG) of all animals were measured. Estimated heritabilities were 0·18 (CONC), 0·71 (ROU), 0·11 (TCNV) and 0·36 (TINT); 0·02 (REA), 0·49 (MARB), 0·15 (DRES), 0·15 (SCF), and from 0·20 to 0·38 for growth traits. Genetic correlations of ROU were different from those of CONC, probably due to inconsistent restrictions on concentrate intake; those of TINT with the weights, ADG and SCF were high. MARB showed positive genetic correlations with growth traits and low correlations with TINT and SCF. High potentiality for improvement of marbling score was suggested.

scholarly journals Determination of the best model for estimation of genetic parameters on the Fars native chicken traits using Bayesian and REML methods

Genetika ◽  
2018 ◽  
Vol 50 (2) ◽  
pp. 431-447
Author(s):  
Ali Mohammadi ◽  
Yousef Naderi ◽  
Reza Nabavi ◽  
Fatemeh Jafari
Keyword(s):  
Body Weight ◽  
Bayesian Approach ◽  
Bayesian Method ◽  
Genetic Parameters ◽  
Genetic Parameter ◽  
Correlation Coefficients ◽  
Native Chicken ◽  
Egg Number ◽  
Estimation Of Genetic Parameters

This study was conducted to determine the best model for genetic parameter estimation on the Fars native chicken traits using Bayesian and REML Methods. Studied traits were body weight at first day (BW1), body weight at eighth weeks (BW8), body weight at 12th weeks (BW12), age at sexual maturity (ASM), egg number production (EGP) and mean egg weight during 28th ,30th and 32nd week ages (EGW) involving three generations 17, 18 and 19 during the years 2010 to 2012. Genetic parameters were estimated with REML method using WOMBAT software and with Bayesian approach using MTGSAM software. Based on AIC and DIC criteria, the most appropriate model was determined. Estimations of direct additive heritabilities for BW1, BW8, BW12, ASM, EGP and EGW by the best models using REML method were 0.31, 0.32, 0.29, 0.45, 0.24 and 0.22 and by Bayesian method were 0.36, 0.33, 0.30, 0.48, 0.26 and 0.25, respectively. The genetic correlation coefficients ranged from -0.709 between EGP and ASM to 0.844 between BW8 and BW12 (by Bayesian method) and ranged from -0.724 between ASM and EGP to 0.894 between BW12 and BW8 (by REML method). Generally, based on the employed criteria, the 1st and 2nd models can be suggested for analysis of body weight traits (BW1, BW8 and BW12), whereas for other traits (ASM, EGP and EGW), 1st, 5th, 4th and 6th models seems to be suitable for estimation of genetic parameters of the Fars Native fowls traits using Bayesian and REML Methods. The Bayesian approach recommended for estimation of genetic parameters on the Fars native chicken traits because this method used the prior distribution in the calculation process.

scholarly journals The Estimation of Genetic Parameters for Body Weight, Body Dimension, and Carcass Traits in Four Egyptian Chickens Strains

2021 ◽  
Vol 11 (2) ◽  
pp. 230-240
Author(s):  
Mahmoud Mostafa El-Attrouny ◽  
Mahmoud Maghraby Iraqi ◽  
Shereen Abdel-Hameed Mohamed
Keyword(s):  
Body Weight ◽  
Genetic Parameters ◽  
Carcass Traits ◽  
Body Dimension ◽  
Estimation Of Genetic Parameters

scholarly journals Genetic parameters for ultrasound-evaluated carcass and body traits in Anglo-Nubian goats

2020 ◽  
Vol 34 (1) ◽  
pp. 40-50
Author(s):  
Luiz AS Figueiredo-Filho ◽  
José LR Sarmento ◽  
José EG Campelo ◽  
Natanael PS Santos ◽  
Luciano S Sena ◽  
...  
Keyword(s):  
Body Weight ◽  
Body Size ◽  
Variance Components ◽  
Genetic Parameters ◽  
Carcass Traits ◽  
Genetic Correlations ◽  
Chest Circumference ◽  
Residual Variance ◽  
Breeding Programs ◽  
Meat Goat

Background: Meat goat breeding programs should prioritize the identification and selection of genetically superior animals for traits related to meat quality and carcass yield in order to increase the value of the final product. Objective: To estimate (co)variance components and genetic parameters for ultrasound-measured carcass traits, body size and body weight in AngloNubian breed goats raised in the Mid-North region of Brazil. Methods: (Co)variance components and genetic parameters were estimated using the single and two-trait animal model analyses via Bayesian inference for loin eye dimensions (area, length, and depth), sternal fat thickness, rump height, chest circumference and depth, leg perimeter, and body weight. Results: Heritability estimates were higher when two-trait analyses were used. This finding implies that it is possible to recover part of the additive genetic variance included in the residual variance due to the correlation between traits. Genetic correlations between carcass and body size traits showed different magnitudes. On the other hand, genetic correlations between the traits related to muscularity showed high magnitudes. Conclusions: Body weight was not a good indicator of muscularity; therefore, it is not recommended as a criterion for indirect selection to improve carcass traits of Anglo-Nubian goats. Leg perimeter and chest circumference may be important to construct selection indexes in meat goat breeding programs.

Effect of in ovo copper injection on body weight, immune response, blood biochemistry and carcass traits of broiler chicks at 35 days of age

2021 ◽  
pp. 1-8
Author(s):  
Hanan A. Hassan ◽  
A. R. Arafat ◽  
K. Y. Farroh ◽  
M. S. Bahnas ◽  
I. El-wardany ◽  
...  
Keyword(s):  
Immune Response ◽  
Body Weight ◽  
Carcass Traits ◽  
Blood Biochemistry ◽  
Broiler Chicks ◽  
In Ovo

Genetic parameters of growth and in vivo computerized tomography based carcass traits in Pannon White rabbits

2006 ◽  
Vol 104 (1-2) ◽  
pp. 46-52 ◽  
Author(s):  
I. Nagy ◽  
N. Ibáñez ◽  
R. Romvári ◽  
W. Mekkawy ◽  
Sz. Metzger ◽  
...  
Keyword(s):  
Computerized Tomography ◽  
Genetic Parameters ◽  
Carcass Traits

Estimated genetic parameters for carcass traits of Brahman cattle

2002 ◽  
Vol 80 (4) ◽  
pp. 955-962 ◽  
Author(s):  
D. G. Riley ◽  
C. C. Chase ◽  
A. C. Hammond ◽  
R. L. West ◽  
D. D. Johnson ◽  
...  
Keyword(s):  
Genetic Parameters ◽  
Carcass Traits ◽  
Brahman Cattle

scholarly journals Performance, Carcass Traits and Meat Quality Evaluation of Sheep Fed Diets Containing Napier Grass and Graded Levels of Cocoa Pod Husk with Soursop Pulp Meals

2017 ◽  
Vol 5 (2) ◽  
pp. 74
Author(s):  
M. I. Okoruwa ◽  
D. O. Okunlola
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Meat Quality ◽  
Quality Evaluation ◽  
Body Weight Gain ◽  
Nitrogen Loss ◽  
Carcass Traits ◽  
Napier Grass ◽  
Daily Weight Gain ◽  
Cocoa Pod Husk

This study was conducted to determine performance, carcass traits and meat quality evaluation of sheep fed napier grass and different proportion of cocoa pod husk and soursop pulp meals. Eighteen (18) West African Dwarf rams, aged between 7 and 8 months old with mean weight of 7.00 ± 0.55kg were allotted to three dietary treatments with two replicates of three sheep per treatment in a completely randomized design. The compared treatment diets were; TA (70% napier grass and 30% concentrate diet), TB (45% cocoa pod husk with 25% soursop pulp and 30% concentrate diet) and TC (50% cocoa pod husk with 20% soursop pulp and 30% concentrate diet). The experimental diets were given to the sheep at 6% of their body weight and the experiment lasted for 84days after 14days of adjustment period. The results showed that average daily feed intake (221.79g), nitrogen intake (18.02g/day), total nitrogen loss (5.08g/day) and chilling losses (12.85%) were significantly (P < 0.05) higher in diet TA compared with diets TB and TC. Treatment diet TC was significantly (P < 0.05) better in total body weight gain (3.66kg), average daily weight gain (43.57g), total digestible nutrient (74.69%), nitrogen retention (77.58%, slaughter weight (11.02kg), hot carcass weight (5.68kg), cold carcass yields (5.23kg), hot with cold carcass yields (51.54 and 47.46%), appearance (6.81), tenderness (6.20) and overall acceptability (6.85) than other treatment diets. Initial body weight, flavor and juiciness were not significantly (P > 0.05) affected by the treatment diets. It was concluded that 50% cocoa pod husk with 20% soursop pulp and 30% concentrate diet has the potential to enhance performance, carcass traits and meat quality evaluation in sheep.

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