Comparison of terminal sire breeds for growth and carcass traits in crossbred lambs

1985 ◽  
Vol 40 (2) ◽  
pp. 315-322 ◽  
Author(s):  
N. D. Cameron ◽  
D. J. Drury
Keyword(s):  
Least Squares ◽  
Carcass Traits ◽  
Subcutaneous Fat ◽  
Similar Degree ◽  
Comparative Performance ◽  
Fixed Weight ◽  
Mature Weight ◽  
Terminal Sire ◽  
Sire Breed ◽  
Weight For Age

ABSTRACTPerformance records for the progeny of matings of Oxford, Texel, Texel-Oxford, Charollais, Charmoise and Meatlinc rams with crossbred ewes were analysed. The lambs, born from 1980 to 1982, were randomly allocated to three slaughter groups: (1) slaughter at fixed weights of 36 and 38 kg for ewe and castrated lambs; (2) slaughter according to estimated fat cover; (3) slaughter at a fixed age of 4·5 or 5·5 months with half-carcass dissection. The analyses were by least squares and effects were fitted for terminal sire breed, breed of maternal grand sire, year of birth, age of dam at lambing, birth-rearing type and sex of lamb and all two-way interactions. The results followed a well-established pattern where weight for age rankings were constant from birth, through weaning, to slaughter. Progeny of Oxford rams were the heaviest, followed by Texel-Oxford, Meatlinc and Charollais, Texel and Charmoise in that order. Lambs sired by rams of low mature weight reached a fixed weight at a later age than those sired by rams of high mature weight. They also reached a similar degree of fat cover at an earlier age and at lighter weights than the larger breeds. The carcass traits indicated that Texel crosses had a higher lean and lower fat proportion than would be expected from their growth and mature weight.The comparative performance of crossbred lambs from 15 terminal sire breeds was assessed, at the same proportion of carcass subcutaneous fat, by combining the results of three experiments.

Correlated responses in slaughter and carcass traits of crossbred progeny to selection for carcass lean content in sheep

1992 ◽  
Vol 1992 ◽  
pp. 27-27
Author(s):  
N.D. Cameron
Keyword(s):  
Selection Index ◽  
Carcass Traits ◽  
Selection Differential ◽  
Population Responses ◽  
Ewe Lambs ◽  
High Line ◽  
Fixed Weight ◽  
Selection For ◽  
Terminal Sire ◽  
Sire Breed

A divergent selection experiment in a terminal sire breed of sheep was started in 1985 to examine the differences between genetically lean and fat animals, which were derived from the same population. Responses in performance and physiological traits measured on the selection lines were reported at the BSAP 1991 Winter Meeting. Responses In slaughter and carcass traits, measured on crossbred progeny of the terminal sires, are presented in this study.The ram selection index was -0.995 FATD + 0.206 WT20, where FATD and WT20 are the ultrasonic backfat depth and liveweight at 20 weeks of age, with both traits standardised to have zero mean and unit phenotyplc variance. A total of 32 and 34 rams from the high (lean) and low (fat) selection lines were performance tested in 1988, and 11 rams were selected from the high line and 12 rams from the low line for mating to crossbred ewes for the progeny test, with a selection differential of 0.85 Index units. There were 8 and 11 rams from the high and low lines with progeny slaughtered at fixed weight, such that the selection differential was 1.0 Index units. A total of 329 crossbred lambs were slaughtered at 16 weeks of age and 250 lambs were slaughtered at fixed weight, 39±1 kg for castrates and 37±1 kg for ewe lambs.

The influence of terminal sire breed on carcass composition and eating quality of crossbred lambs

1997 ◽  
Vol 64 (1) ◽  
pp. 77-86 ◽  
Author(s):  
M. Ellis ◽  
G. M. Webster ◽  
B. G. Merrell ◽  
I. Brown
Keyword(s):  
Subcutaneous Fat ◽  
Quality Characteristics ◽  
Carcass Composition ◽  
The Other ◽  
Eating Quality ◽  
Intermuscular Fat ◽  
Fat Level ◽  
Terminal Sire ◽  
Sire Breed

AbstractCarcass and eating quality characteristics of crossbred wether and female lambs sired by Charollais (C), Suffolk (S) and Texel (T) rams out of Mule ewes (Bluefaced Leicester ♂ × Scottish Blackface ♀ or Swaledale ♀J)were evaluated in a study carried out over a 3-year period in an upland flock. A total of 10 unrelated rams of each breed were used as sires. Lambs (no. = 280) were selected for slaughter at the same estimated subcutaneous fat level on four occasions within each year (i.e. at weaning in July and at approx. monthly intervals thereafter). Following slaughter, the left side of each carcass was physically dissected. A loin joint from lambs slaughtered in the 2nd and 3rd years of the study (no. = 184) was used to evaluate eating quality.Suffolk-sired lambs were heavier at slaughter (S: 42·2; C: 41·0; T: 40·7 (s.e. 0·35) kg) but had similar killing-out proportions compared with the other two breeds (S: 444; C: 450; T: 452 (s.e. 26) g/kg). Texel-sired lambs had higher lean proportion (S: 543; C: 550; T: 567 (s.e. 4·4) g/kg) and lower total carcass fat proportion (S: 240; C: 242; T: 233 (s.e. 5·3) g/kg) compared with S and C sired lambs. Bone proportion was similar for C and T lambs but was higher for S (S: 199; C: 191; T: 191 (s.e. 2·1) g/kg). Lean: bone (S: 2·75; C: 2·90; T: 2·99 (s.e. 0·037)) and lean:fat (S: 2·38; C: 2·40; T: 2·54 (s.e. 0·034)) ratios were higher for T-sired lambs. Female lambs were lighter (40·4 v. 42·2 (s.e. 0·24) kg), and had proportionately more intermuscular fat than wethers (122 v.118 (s.e. 1·3) g/kg) but the sex differences for other tissue proportions were small. Carcass weights and total carcass fat proportions increased and lean proportions decreased across the four slaughter dates. There were no effects of breed or sex on eating quality. However, samples from lambs slaughtered at weaning were judged to be more tender than those slaughtered later in the season.

A comparison of the Suffolk and Vendeen breeds when used as terminal sires for crossbred lamb production

1993 ◽  
Vol 1993 ◽  
pp. 116-116
Author(s):  
B G Merrell
Keyword(s):  
Carcass Traits ◽  
Carcass Characteristics ◽  
Carcass Quality ◽  
The Uk ◽  
Terminal Sire ◽  
Sire Breed

Lamb carcass quality is becoming economically more important. Crossbred lamb production in the UK is based upon the use of terminal sire breeds, chosen for carcass characteristics, mated to crossbred ewes, chosen for maternal attributes. The choice of terminal sire breed represents the most immediate option available to the commercial producer to improve the carcass characteristics of finished lambs. Previous studies (Croston, Guy, Jones, and Kempster, 1983; Cameron and Drury, 1985; Merrell, Webster and Ellis, 1990) have compared several terminal sire breeds, but these have tended to concentrate on the British Down breeds, particularly the Suffolk, and tne numerically more important imported breeds, such as the Texel and Charollais. Vendeen sheep were imported from France in 1981 but little information was available on growth and carcass traits of Vendeen crossbred lambs. A three year experiment compared, within a flock, the performance of the crossbred progeny of Suffolk and Vendeen rams.

Comparative performance of crossbred ewes from three crossing sire breeds

1983 ◽  
Vol 37 (3) ◽  
pp. 415-421 ◽  
Author(s):  
N. D. Cameron ◽  
C. Smith ◽  
F. K. Deeble
Keyword(s):  
Least Squares ◽  
Sexual Maturity ◽  
The Other ◽  
Comparative Performance ◽  
England And Wales ◽  
Least Squares Fitting ◽  
Litter Weight ◽  
Sire Breed

ABSTRACTThe performance of crossbred ewes sired by Border Leicester (BL), Bluefaced Leicester (BFL) and ABRO Damline (DL) crossing sires was compared. The dams of the crossbred ewes were of three hill breeds (Scottish Blackface, Swaledale and Welsh Mountain). Contemporary comparisons were made on 18 commercial and college farms throughout England and Wales from 1977 to 1981. A total of 1 277 crossbred ewes were involved with data on up to three years' lambings per ewe, giving a total of 3 522 mating records. The analyses were by least squares, fitting constants for terminal ram breed × farm × year of birth of ewe groups, sire breed, dam breed, age of crossbred ewe and all two-way interactions.The DL crossbred ewes were lighter at mating than the other crossbreds at each age. The proportion of 1-year-old crossbred ewes lambing was highest for the DL (0·78), compared to BFL (0·73) and BL (0·62), indicating earlier sexual maturity. Over all ages, the DL crossbreds were more prolific with 1·79 lambs per ewe lambing compared to BFL (1·63) and BL (1·53) and more lambs were weaned (1·33, 1·29 and 1·19 respectively). The total litter weight at both birth and weaning of the DL crossbreds was greater than the BL crossbreds but less than the BFL crossbreds at each age. For prolificacy and early sexual maturity, the DL cross is superior to both breeds. In overall production, the DL cross had no advantage over the BFL cross, as the litters of the DL crossbred ewes were lighter than the BFL litters at both birth and 10 weeks of age

scholarly journals Comparison of two live-animal ultrasound systems for genetic evaluation of carcass traits in Angus cattle

2021 ◽  
Author(s):  
C J Duff ◽  
J H J van der Werf ◽  
P F Parnell ◽  
S A Clark
Keyword(s):  
Carcass Traits ◽  
Genetic Correlations ◽  
Subcutaneous Fat ◽  
Genetic Evaluation ◽  
Ultrasound Scan ◽  
Ultrasound Scanning ◽  
Eye Muscle ◽  
Angus Cattle ◽  
Breeding Objective ◽  
Two Systems

Abstract The improvement of carcass traits is an important breeding objective in beef cattle breeding programs. The most common way of selecting for improvement in carcass traits is via indirect selection using ultrasound scanning of selection candidates which are submitted to genetic evaluation programs. Two systems used to analyse ultrasound images to predict carcass traits are the Pie Medical Esaote Aquila (PIE) and Central Ultrasound Processing (CUP). This study compared the ability of the two systems to predict carcass traits for genetic evaluation in Australian Angus cattle. Genetic and phenotypic parameters were estimated using data from 1648 Angus steers which were ultrasound scanned twice with both systems, first at feedlot entry and then following 100 days in the feedlot. The traits interpreted from ultrasound scanning included eye muscle area (EMA), rib fat (RIB) rump fat (RUMP) and intramuscular fat (IMF). Abattoir carcass data were collected on all steers following the full feedlot feeding period of 285 days. For all ultrasound scan traits, CUP resulted in higher phenotypic and genetic variances compared to the PIE. For IMF, CUP had higher heritability at feedlot intake (0.51 for CUP compared to 0.37 for PIE) and after 100 days feeding (0.54 for CUP compared to 0.45 PIE). CUP predicted IMF also tended to have stronger correlations with the breeding objective traits of carcass IMF marbling traits, both genetically (ranging from 0.59 to 0.75 for CUP compared to 0.45 to 0.63 for PIE) and phenotypically (ranging from 0.27 to 0.43 for CUP compared to 0.19 to 0.28 for PIE). Ultrasound scan EMA were the only group of traits in which the heritabilities were higher for PIE (0.52 for PIE compared to 0.40 for CUP at feedlot intake and 0.46 for PIE compared to 0.43 for CUP at 100 days of feeding), however with similar relationships to the breeding objective carcass EMA observed. For subcutaneous fat traits of ultrasound RIB and RUMP, the heritabilites and genetic correlations to the related carcass traits were similar, with the exception being the higher heritability observed for CUP predicted RUMP at feedlot intake at 0.52 compared to 0.38 for PIE. The results from this study indicates that the CUP system, compared to PIE, provides an advantage for genetic evaluation of carcass traits in Angus cattle, particularly for the IMF and associated marbling traits.

scholarly journals Growth performance and carcass traits of young nellore bulls supplemented with or without addition of lipids

2020 ◽  
Vol 36 (2) ◽  
Author(s):  
Clóvis Carlos Silveira Filho ◽  
Carlos Augusto de Alencar Fontes ◽  
Elizabeth Fonsêca Processi ◽  
Laila Cecília Ramos Bendia ◽  
Paulo Roberto Silveira Pimentel ◽  
...  
Keyword(s):  
Growth Performance ◽  
Dry Matter ◽  
Reference Group ◽  
Carcass Traits ◽  
Subcutaneous Fat ◽  
Panicum Maximum ◽  
Concentrate Supplementation ◽  
Average Intake ◽  
Subcutaneous Fat Thickness ◽  
Fat Thickness

The aim of research was to evaluate the performance and characteristics of the carcasses of Nellore young bulls in grazing supplemented with or without addition of lipids. Twenty–eight young bulls, 301 ± 5.8 kg in body weight, which four constituted the reference group and the twenty-four remnants were used in the experiment and randomly distributed into four groups according to treatment: only Panicum maximum cv. Mombasa grass; Mombasa grass with concentrated supplementation based on soybean meal; Mombasa grass with concentrate containing lipids from soybean oil; and Mombasa grass with concentrate containing lipids derived from soybean grains. The total dry matter intake of the animals fed only Mombasa grass did not differ from the average intake of the three treatments supplemented with concentrate. There were no differences (P>0.05) between Mombasa grass and diets with concentrate, supplementation with or without lipid and lipids sources in the carcass traits, gastrointestinal tract, organs and loin eye area. Nellore bulls receiving concentrate increased subcutaneous fat thickness compared with bulls that received only Mombasa grass. Nellore young bulls fed Mombasa grass only, supplemented with or without addition of lipids were similar regarding growth performance and carcass traits.

scholarly journals The quality of pork ham - tissue yield depending on individual factors

2018 ◽  
Vol 34 (4) ◽  
pp. 395-404
Author(s):  
Cedomir Radovic ◽  
Marija Gogic ◽  
Nenad Parunovic ◽  
Dragan Radojkovic ◽  
Radomir Savic ◽  
...  
Keyword(s):  
Muscle Tissue ◽  
Subcutaneous Fat ◽  
Fatty Tissue ◽  
Fat Tissue ◽  
Large White ◽  
Mean Values ◽  
Four Seasons ◽  
The Mean ◽  
Subcutaneous Fat Tissue ◽  
Sire Breed

The study included the progeny of three boar-sires breeds (SL - Swedish Landrace; LW - Large White and P - Pietrain). A total of 201 progeny of both sexes (93 female and 108 male castrated animals), originating from 16 boar-sires, were tested. The study included the progeny of 10 SL boar-sires (sires nuRWer: 1, 2, 3, 7, 8, 9, 15, 16, 17 and 18), progeny of 3 LW sires (sires nuRWer: 4, 5 and 6) and 3 P boar-sires (sires nuRWer 14, 19 and 20), born in four seasons (winter, spring, summer and autumn). Studies have shown that, with an mean weight of a warm carcass side of 81.20 kg, the highest mean values for ham weight (RW; 10.456 kg), mass of intermuscular fatty tissue (RINT; 0.477 kg), ham bone (RB; 0.837 kg) and muscle tissue RMT, 7,939 kg) have progeny of the sires of Pietrain breed (P) compared to SL and LW sires. In comparison to animals sired by SL and LW boars, the progeny of P sires had less skin and subcutaneous fat tissue (RSFT) by 30 and 549 grams. Studies have shown that we have progeny of sires 7 and 9 of SL breed which have the lowest LSMean values for the yield of skin and subcutaneous fat tissue (869 and 876 g), which is below the mean for breed by 364 and 357 g. In addition, when it comes to intermuscular fatty tissue, the lowest established value was recorded in the progeny of sire no. 8 of SL breed (182 g), which is by 220 g less than the general mean and by 132 g below the mean of the sire breed. The animals originating from sires n. 19 and 20 showed the highest weight of muscle tissue (RMT) (8.489 and 8.118 kg) in the ham, which is by 2.853 and 2.482 kg more meat compared to the progeny of sire no. 5 of LW breed. The total weight of the ham and the ham muscle yield were influenced by (P <0.01 and P <0.001) sire breed, sires within the breed, gender and season of birth. A very significant (P <0.001) influence of the weight of warm carcass sides on the ham weight and tissue yield was determined.

Fatty acid profile, carcass traits and meat quality of Nellore steers following supplementation with various lipid sources

2017 ◽  
Vol 57 (6) ◽  
pp. 1170 ◽  
Author(s):  
Isabela P. C. Carvalho ◽  
Giovani Fiorentini ◽  
Josiane F. Lage ◽  
Juliana D. Messana ◽  
Roberta. C. Canesin ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Dietary Supplements ◽  
Meat Quality ◽  
Linseed Oil ◽  
Statistical Significance ◽  
Average Daily Gain ◽  
Carcass Traits ◽  
Subcutaneous Fat ◽  
Practical Significance

The aim of the present study was to evaluate the fatty acid composition of meat and subcutaneous fat, carcass traits and meat quality of Nellore steers fed diets supplemented with various lipid sources. Forty-five young bulls, with average bodyweight of 441 ± 30 kg, were allotted into 10 paddocks, with five treatments, each consisting of two paddocks. The bulls were randomly assigned into one of the following five treatments, which consisted of four lipid sources: palm oil (PO), linseed oil, rumen protected fat (soybean-based oil), whole soybean, and a control (without additional fat). Trial duration was 120 days, which included 30 days of adaptation. Supplements were offered daily at 10 g/kg bodyweight per day. Dietary supplements for providing additional fat were formulated to consist of 10% ether extract. Lipid sources did not significantly affect the average daily gain (P = 0.797) or dressing percentage (P = 0.663). Supplementation with PO increased the concentrations of lauric acid (P = 0.036) and myristic acid (P < 0.001) in the muscle and subcutaneous fat. Animals supplemented with linseed oil had significantly higher concentrations of conjugated linolenic acid in the meat (P = 0.036) and fat (P = 0.049) than did control animals. In the present study, the use of various lipid sources in dietary supplements of grazing cattle during finishing period did not affect carcass traits or physical attributes of beef. This absence of statistical significance may be related to the minimum number of repeat paddocks (2) per treatment. Thus, differences that can have a practical significance were not evidenced by statistical analysis. The inclusion of PO and protected fatty acids derived from soybean oil (rumen-protected fat) is not recommended as a method to improve the lipid profile of meat and subcutaneous fat of Nellore cattle.

A comparison of the carcass and meat quality characteristics of piemontese - and charolais-cross cattle at the same subcutaneous fat proportion

1992 ◽  
Vol 1992 ◽  
pp. 187-187 ◽  
Author(s):  
A.V. Fisher ◽  
G.R. Nute ◽  
M.H. Davies
Keyword(s):  
United Kingdom ◽  
Growth Performance ◽  
Dairy Cows ◽  
Meat Quality ◽  
Subcutaneous Fat ◽  
Dairy Herd ◽  
Quality Characteristics ◽  
The United Kingdom ◽  
Sire Breed

Since the early 1980's there has been a growing interest in the Italian Piemontese breed as a crossing sire breed for use on dairy cows in the United Kingdom. Early interest was centred on ease of calving, growth performance and carcass yields but more recently there have been claims that the Piemontese breed produces meat which ranks highly for tenderness. The aim of this study was to evaluate carcass and meat qualities of Piemontese - sired cattle out of the British dairy herd by comparing these characteristics with similar and contemporaneous Charolais - sired cattle.

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