Variation and correlation of live and carcass traits of lambs

Cover of: Variation and correlation of live and carcass traits of lambs |

Published by Washington Agricultural Experiment Stations, Institute of Agricultural Sciences, Washington State University in [Pullman, Wash.] .

Written in English

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  • Lambs,
  • Lambs -- Carcasses

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Statement[M.E. Stanley ... et al.].
SeriesBulletin / Washington Agricultural Experiment Station -- 649., Bulletin (Washington Agricultural Experiment Station) -- 649.
ContributionsStanley, Marion E.
The Physical Object
Pagination31 p. :
Number of Pages31
ID Numbers
Open LibraryOL17533352M

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Miscellaneous: Variation and correlation of live and carcass traits of lambs. pp Abstract: Correlations between 31 measurements on live sheep sheep Subject Category: Organism Names see more details and carcases, for a total of animals animals Subject Category: Organism NamesCited by: 1.

Genetic analyses of live weight and carcass composition traits in purebred Texel, Suffolk and Charollais lambs S.

Fitzmaurice1, 2†, J. Conington1, N. Fetherstone, T. Pabiou 3, K. McDermott, E. Wall3, G. Banos1 and N. McHugh2 1Department of Animal and Veterinary Sciences, Scotland’s Rural College (SRUC), Easter Bush, Midlothian, Scotland EH25 9RG, UK; 2Department of Animal and.

Timon and Bichard () reported an inverse relationship between fat and carcass specific gravity in lambs. The correlation coefficients ranged from - to - Working with 83 lambs, they found that carcass specific gravity accounted for and percent of the respective variances in carcass fat and muscle percentages.

Carcass characteristics and rib section parameters of the same steers harvested at the end of the winter grazing periods are shown in Table In general, the data demonstrated the expected differences between the beef breeds, a dairy breed, and a nontraditional beef breed: the beef breeds had more fat, greater ribeyes, smaller KPH (kidney, pelvic and heart fat), and less bone.

Genetic and phenotypic correlation estimates for the carcass composition traits, adjusted for hot carcass weight, are presented in Tables 1, 2 and 3, as well as predicted correlated responses in the carcass traits (in trait units) from index selection over 10 years (Tables 2 and 3).

Meat production is the most important trait in the breeding objectives of sheep production in East Africa. The aim of this study was to investigate breed differences in live weight, conformation, carcass traits and economic values for meat production among Red Maasai and Dorper sheep and their crosses.

In total, 88 ram lambs, which were reared at the ILRI experimental station, Kapiti plains. Within-bloodline genetic correlations of the reproduction traits with wool production were generally positive, being for the correlation between total weight of lamb weaned and clean.

Simple correlation coefficients between body measurements with each of body weight and carcass traits, within each breed, were calculated and tested for significance.

To predict carcass composition traits of each breed based on body measurements, the stepwise procedure was used to select the variable for prediction equations. Copy number variation (CNV) is a type of genomic variation with an important effect on animal phenotype. We found that the PIGY gene contains a bp copy number variation (CNV) region located in chromosome 6 of sheep (Oar_v 36,–36, bp).

This region overlaps with multiple quantitative trait loci related to phenotypes like muscle density and Variation and correlation of live and carcass traits of lambs book weight. Thirty-five mature Churra ewes, ranging in live weight from 303 to 526 kg and in body condition score from 125 to 400 were used to study the relationship between body condition score (BCS), live weight (LW) and body composition and fat distribution in ewes of this breed, which is one of the major sheep breeds of northern Spain.

The aim of this chapter is to give a general overview of carcass characteristics, of sheep and goat meat quality, and the factors that can influence them. Carcass and meat compositions are highly variable and depend on many factors, such as husbandry systems, breed, gender, slaughter weight, and the management of the animals before slaughter.

The most satisfactory correlation between carcass and ultrasound measurements was between the 3rd and 4th lumbar vertebrae fat thickness (FTh). The first variable admitted in the models to predict carcass composition (live weight, LW) explained between 63% and 96% of the total variation of the weight of the components of the carcass.

The correlation of intramuscular fat content between muscles of the lamb carcass and the use of computed tomography to predict intramuscular fat percentage in lambs - Volume 9 Issue 7 - F. Anderson, D. Pethick, G. Gardner. Subcutaneous fat thickness and LM traits, cross-sectional area between the 12th and 13th rib were measured using real-time ultrasound in vivo and on the carcass after slaughter.

All ultrasound and carcass measurements were different (P > ) except carcass yield and carcass LM width in female lambs (FL and FH). Genotype and supplementation effects on carcass morphometric traits.

Carcass morphometric characteristics of the present study were described by carcass length, lean meat weight, lean meat length, compactness index, chest width, shoulder width, and lean meat thickness presented in Table 4.

Hence, the length of the carcass and lean meat had. Comparisons were made of carcass and meat quality characteristics of pasture-raised Texel-cross ewe (n=) and ram (n=) lambs between 5 and 8 months of age with an average carcass weight of Genetic parameters were estimated between current UK hill sheep breeding goals and lamb carcass composition and muscularity traits derived using X-ray computed tomography (CT).

To produce these estimates, a total of lambs from two hill farms were CT scanned at weaning (ca days of age), over 3 years, and total weights of carcass muscle. Meat quality traits in lamb were examined and their genetic parameters and genetic correlations to carcass composition were estimated.

Dissection was performed on lamb carcasses and the weight. Carcass composition and quality and eating quality of the m. longissimus dorsi (LD) were compared in 15 entire male (ram) and 15 female (ewe) pure bred Dorset Down lambs (carcass weight range 12 to 23 kg).

Rams grew 28 g/day faster than ewes, taking on average 2 weeks less to achieve 35 kg live. Associations between variation in ovine WFIKKN2 and variation in growth traits in male and female NZ Romney lambs. Of the five variants identified, association analyses between the genetic variation and variation in growth and carcass muscle traits were restricted to variants A, B and C; as D and E were present at a frequency less than 2% and this could potentially confound the analyses.

The experiment was conducted using twenty-five Farta sheep to investigate the response of supplementing dried Sesbania sesban leaves (SSL) on feed intake, digestibility, growth performance and carcass characteristics of Farta sheep fed urea-treated rice straw.

Twenty-five male Farta sheep with initial body weight of ± kg (mean ± SD) were used in randomized complete block design. Genetic correlations of CT scan carcass traits. A high genetic correlation of was found between both CT fat traits, Fat1 and Fat2.

The correlation of EMA with Fat1 and Fat2 was low ( andrespectively), and not significantly different from zero.

Few studies have presented genetic parameters for CT traits in sheep. The genetic correlation between carcass fat and fat-free weight was when lambs were slaughtered at a constant age.

Fat-free weight was nearly uncorrelated with percentages of fat, water, and protein when lambs were slaughtered at the same age. Flock composition of the sheep breeds of Ethiopia is estimated as, and % for the age categorization of. Table 2 Characterization of carcass traits in lambs with low, medium, and high residual feed intake (RFI).

them had a negative correlation with FCR and RFI. The variation can be explained as. Carcass traits used to evaluate lamb carcasses are based on industry standards for dressing percentage and ultrasound measurements of fat and muscling.

n Hot carcass weight and dressing percentage: The weight of the carcass after slaughter is referred to as hot carcass weight. The relationship between live weight and hot carcass weight is. and carcass traits of hair-sheep breeds finished on grass pastures.

Therefore, the objective of this study was to compare live animal performance and carcass character-isticsofDorper,ambstoSuffolk lambs raised on grass pastures.

Materials and methods Animals and experiment All experimental procedures were reviewed and. The pre slaughter weight (PSW), empty live weight (ELW) and hot carcass weight and hot carcass weight with edible offal was higher (P of live weight (LW) and empty live weight (ELW) was also higher in G2 and G3 than G1 due to the higher.

Carcass weight, yield, and fat measurements are parameters of great importance to producers, since the carcass yield describes the proportion of live weight attributed to carcass weight expressed as a percentage (Sañudo and others ), and the weight and fat measurement can determine the price paid for lamb carcasses (Gardner and others ).

Eventually this wide variation could be use by animal breeders for selection of animals with a lesser amount of carcass fat. Live weight of lambs showed a relatively low correlation with. Genetic parameters for a range of sheep production traits have been reviewed from estimates published over the last decade.

Weighted means and standard errors of estimates of direct and maternal heritability, common environmental effects and the correlation between direct and maternal effects are presented for various growth, carcass and meat, wool, reproduction, disease resistance and feed.

Variation within three regions (exonexon and exon 9) of ovine HSL and its association with post-weaning growth (n = ) and carcass traits (n = ) was investigated in NZ Suffolk sheep.

Four intron 5 variants (designated A-D) and two exon 9 variants (designated a and b). This book reviews the historical and recent developments for carcass evaluation and grading for meat quality assessment in beef and sheep. It places special emphasis on new concepts and approaches to define carcass and meat quality and on the use of modern technologies for.

In carcases from lambs killed at about 43 kg liveweight in and there was significant difference between years in area of eye muscle, dressing percentage and percentages of shoulder, rib rack, and leg. Between Suffolk lambs and those of a closed line of crossbreds all those characteristics and thickness of backfat and percentage loin also differed.

Genetic correlations between reproduction traits in ewes and carcass and meat quality traits in Merino rams were obtained using restricted maximum likelihood procedures. The carcass data were from Merino rams slaughtered at approximately 18 months of age that were the progeny of sires from three research resource flocks over 7 years.

of lamb carcass composition from live animal measurements over the last 35 yr. A goal of live animal measurement is to predict carcass traits that are determinants of carcass value. Which method(s) of prediction will have an impact depends on accuracy, cost, and availability.

The live-animal measurements that have the greatest potential are. This study was carried out at Siwa Research Station which belonging to Desert Research Center, Egypt, to determine the effects of weaning age on growth performance, feed intake and carcass characteristics. A total of 28 newborn male Barki lambs were used for days.

Lambs were divided into two equal groups (14 lambs of each) and weaned either at 60 (early weaning, EW, with birth. genetic improvement in lamb carcass quali-ty will depend upon the development of reasonably accurate live animal measures of carcass quality." Considerable developments have occurred in the technology av ailable to measur e body composition in live animals.

However, the change in carcass composition of US lambs has been limited. Although the. CARCASS AND MEAT CHARACTERISTICS. Boer goats offer a carcass that is generally lean in appearance, less compact than sheep and of differing carcass proportions with less total tissue distributed to the hind leg than in sheep (Naude and Hofmeyr, ; Casey, ).

Dressing percentage (DP) is an important criterion describing carcass yield. Goat is a worldwide spread species with different specialities and aptitudes, among the meat production.

Its consumption varies widely depending on the region of the world considered. However, a common factor is the presence of few studies in comparison with ovine, especially those that characterize the quality of its products (related to carcass and meat).

On the other hand, the other carcass traits, body components and commercial cuts were within normal variations of slaughtered Santa Ines sheep weighing 30 kg (Cardoso et al., ). The results pertaining to the measurements of eye muscle area were close to those observed by Landim et al. () and Cardoso et al.

(). Investigation of GDF8's role in sheep has relied on association testing between linked microsatellite markers and variation in live-weight measures of muscling, fatness and carcass traits. Initial investigations using commercial New Zealand Texels reported high levels of marker homozygosity and effects on muscling and fatness [ 6 ].Relationship between calpastatin activity and lamb carcass characteristics.

Journal of Animal Science Supplement. 85(1) Ultrasound Estimates of Loin Muscle Measures and Backfat Thickness Augment Live Animal Prediction of Weights of Subprimal Cuts in Sheep.

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