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.

Genetic parameters for live weight, ultrasonic measurements and conformation in Bluefaced Leicester sheep

1999 ◽  
Vol 1999 ◽  
pp. 122-122 ◽  
Author(s):  
A.M. van Heelsum ◽  
R.M. Lewis ◽  
D.W. Jones ◽  
W. Haresign ◽  
M.H. Davies
Keyword(s):  
Selection Index ◽  
Live Weight ◽  
Carcass Quality ◽  
Export Markets ◽  
Acceptable Quality ◽  
Breeding Programmes ◽  
The Uk ◽  
Terminal Sire ◽  
Sire Breed

Currently fewer than 50% of UK lambs produce carcasses of acceptable quality for the domestic and export markets, which compromises the competitiveness of sheep farming. Carcass quality can be changed by selection, and this is now being taken advantage of in terminal sire breeds and, to a lesser extent, in hill breeds. However, little attention has yet been focused on the crossing breeds, which have relatively poor carcass quality, in spite of the large impact such breeds have on the slaughter generation. Recently, a long-term project began to develop breeding programmes relevant to crossing sire (‘longwool’) breeds. Its objective is to produce a selection index to improve carcass quality without compromising the reproductive performance or maternal ability of these breeds. The Bluefaced Leicester is the most prevalent crossing sire breed with its crossbred (‘Mule’) daughters out of draft hill ewes accounting for 89% of crossbred (longwool x hill) ewes in the UK (Pollot, 1998).

Growth and carcass characteristics of crossbred (Mule) sheep

2002 ◽  
Vol 2002 ◽  
pp. 195-195
Author(s):  
A. M. van Heelsum ◽  
R. M. Lewis ◽  
W. Haresign ◽  
D. Jones ◽  
S. Williams ◽  
...  
Keyword(s):  
Genetic Improvement ◽  
Selection Index ◽  
Carcass Characteristics ◽  
Breeding Programme ◽  
Carcass Quality ◽  
Quality Traits ◽  
Improvement Programme ◽  
The Uk ◽  
Terminal Sire ◽  
Meat Sector

With increasing emphasis in the meat sector on better and more consistent quality, carcass leanness and conformation is now an important issue for sheep breeders. In 1999, only 47% of all carcasses in the UK met the target specifications for weight, fat and conformation (MLC, 2000), highlighting the potential for improvement. In the current stratified crossbreeding system, crossbred wether lambs are a by-product of the production of dam line ewes for the lowland sector. If their carcass quality is sufficient, they can give a valuable boost to the economics of the breeding programme. Genetic improvement of carcass quality in crossing sire breeds would benefit the crossbred wethers, as well as filter through to the terminal sire cross lambs produced by the crossbred ewes. This work aims to assess the influence of selection index and live conformation score of crossing sires (in this case Bluefaced Leicesters) on growth and carcass quality traits of their crossbred progeny, as a first step towards designing a genetic improvement programme for crossing sire sheep.

scholarly journals Fattening performance and carcass traits of implanted and supplemented grassfed bulls

2021 ◽  
Vol XXXI (2) ◽  
pp. 53-60
Author(s):  
Nelson Huerta-Leidenz ◽  
Nancy Jerez-Timaure ◽  
Susmira Godoy ◽  
Carlos Rodríguez-Matos ◽  
Omar Araujo-Febres
Keyword(s):  
Fixed Effects ◽  
Random Effect ◽  
Carcass Traits ◽  
Carcass Characteristics ◽  
Growth Trait ◽  
Daily Weight Gain ◽  
Carcass Quality ◽  
Fattening Performance ◽  
Mineral Supplementation ◽  
Beneficial Impact

Ninety-nine uncastrated males were randomly distributed into four grazing groups to examine variation in growth and carcass traits, due to the implant regime [Implantation of 72 miligrams (mg) of Ralgro® at day (d) 0 followed by its reimplantation at d 90 versus implantation of Revalor® at d 0 followed by 72 mg of Ralgro® at d 90)], and suplementation type [mineral supplementation (MS) versus strategic supplementation (SS)]. With a 2 x 2 factorial arrangement, the analysis of variance included the treatments and their interaction (implant regimen x supplementation) as fixed effects, and the breed type as a random effect. The interaction was not significant; neither did the implant regimen on any growth trait (P > 0.05). Compared to MS, the SS group had a greater daily weight gain (779 vs. 541 grams; P < 0.001), required a shorter (38.3 d lesser) time of fattening to reach the end point (198.3 versus 236.6 d; P < 0.001) with a heavier liveweight (498. 2 vs. 474. 4 kilograms; P = 0.02) at an earlier age (29.4 vs. 30.­8 months; P < 0.001), with a higher carcass dressing percentage (59.13 vs 57.62 %; P = 0.03) and younger carcass bone maturity (P < 0.001). With the exception of thoracic depth, carcass traits did not vary with the implant regimen (P > 0.05). The use of aggressive implant regimens to improve growth or carcass characteristics of grazing bulls is not justified. SS is a feasible practice to improve fattening performance of grazing bulls but no beneficial impact on their carcass quality was expected.

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 effect of genotype on lamb carcass characteristics

1995 ◽  
Vol 1995 ◽  
pp. 45-45
Author(s):  
S.D. Johnston ◽  
R.W.J. Steen
Keyword(s):  
Carcass Characteristics ◽  
Carcass Quality ◽  
Female Genotype ◽  
Intermuscular Fat ◽  
Terminal Sire ◽  
Selection Of

The most important consideration in quality lamb production is the breed genotype used. Much work has examined a selection of terminal sire breeds, but less emphasis has been placed on assessing the influence of the female genotype on carcass quality. The benefits of the Texel breed in terms of higher carcass lean content has been highlighted (More O’Ferrall and Timon, 1977; Kempster et al 1987), but it has been suggested that Texel lambs are penalised under current MLC grading guidelines. Leymaster and Jenkins (1993) reinforced this suggestion by indicating that Texel sired lambs deposited proportionally more subcutaneous and less intermuscular fat than Suffolk sired lambs.This study was carried out to compare the Dutch Texel (DT) and Suffolk (S) breeds as terminal sires and crossed with Greyface (GF) and Suffolk Cheviot (SC) dams. The effect of the proportion of DT blood in lambs on carcass quality was also examined. For this purpose GF, DT x GF and pure DT lambs were compared.

BREED OF TERMINAL SIRE EFFECTS ON CARCASS CHARACTERISTICS OF THREE-WAY CROSS BEEF CATTLE REARED AT TWO LOCATIONS

1983 ◽  
Vol 63 (3) ◽  
pp. 523-549 ◽  
Author(s):  
G. W. RAHNEFELD ◽  
H. T. FREDEEN ◽  
G. M. WEISS ◽  
J. A. NEWMAN ◽  
J. E. LAWSON
Keyword(s):  
Beef Cattle ◽  
Key Words ◽  
Degrees Of Freedom ◽  
Carcass Characteristics ◽  
Carcass Weight ◽  
Paired Comparisons ◽  
Breed Differences ◽  
Terminal Sire ◽  
Sire Breed ◽  
Carcass Cuts

Carcass characteristics of 3673 steers and heifers born over a 6-yr period (1973–1978) at Brandon, Manitoba (farm conditions) and Manyberries, Alberta (range conditions) were compared. Calves weaned at Manyberries were fed and evaluated at Lacombe. The progeny produced were out of 10 specific F1 crosses of dams mated to bulls of the Charolais (C), Simmental (S), Limousin (L) and Chianina (Chi) breeds. Dam crosses included the Hereford × Angus (HA) and crosses sired by C, S and L sires out of H, A and Shorthorn (N) dams. Terminal sire breed differences in the paired comparisons involving progeny of the Chi (the comparisons with maximum degrees of freedom) indicated that their carcass weight per day of age averaged 1.1% greater than C, 3.6% greater than S and 6.4% greater than L at both locations [Formula: see text]. Simmental progeny had significantly heavier (P = 0.0001) hide weights as a percentage of liveweight and significantly lower (P = 0.0001) dressing percentages than the progeny from C, L and Chi sires. Limousin and Chi-sired progeny had the lowest percentage of hide weight and the highest dressing percentage. Limousin progeny averaged 5.2% greater rib eye area/wt (cm2/kg) than Chi progeny P = 0.0001). Chianina progeny had the lowest proportions (percent of hot carcass weight) of long loin, rib, brisket and flank and the highest proportions of round and the combined trait of rib, round and long loin (P < 0.05). Chianina progeny had the highest percentage of lean in the rib, chuck and long loin while L-sired progeny had the highest percentage lean in the round. Chianina progeny had the highest and L progeny the lowest percentage bone in the rib, chuck, round and long loin. Limousin progeny had the highest lean:bone ratios but least percent lean per day of age at the long loin and round. At both locations significant terminal sire breed by year interactions were observed for all traits. The interactions of breed of dam by year, by sex, and by breed of sire and the interaction of year by sex were nonsignificant. Key words: Cattle, breeds, carcass, cuts, composition

Response of suffolk and texel rams to implantation with melatonin

1991 ◽  
Vol 1991 ◽  
pp. 15-15
Author(s):  
S.M. Bateman ◽  
W. Haresign
Keyword(s):  
Reproductive Performance ◽  
Research Effort ◽  
Carcass Quality ◽  
High Fertility ◽  
Testis Size ◽  
Seasonal Fluctuations ◽  
Sheep Meat ◽  
Testicular Recrudescence ◽  
The Uk ◽  
Terminal Sire

There is currently much interest in overcoming the seasonality of sheep meat supplies in the UK and improving carcass quality. Towards that end, much research effort has been devoted to the development of techniques to induce early or out-of-season breeding in the ewe, but little attention has been paid to the male. Rams of most breeds show marked seasonal fluctuations In reproductive performance, with a depression in testis size, libido and semen quantity and quality during the spring and summer months and a period of high fertility in the autumn/winter, coinciding with the breeding season of ewes of the same breed. Problems of subfertllity which are frequently encountered following the use of various techniques to induce out-of-season breeding in the ewe may therefore be attributable, at least in part, to the ram. The choice of terminal sire for early lambing flocks is further compromised because some breeds of ram show later testicular recrudescence than others.

Comparative Performance of Castrated Male Lambs from two Crossing-Sire Breeds

1994 ◽  
Vol 1994 ◽  
pp. 225-225
Author(s):  
B G Merrell ◽  
B A Hedley
Keyword(s):  
Initial Phase ◽  
Carcass Characteristics ◽  
Comparative Performance ◽  
Ewe Lambs ◽  
Term Experiment ◽  
Long Term Experiment ◽  
Set Up ◽  
The Uk ◽  
Terminal Sire

Finished lamb production in the UK is based upon the use of terminal sire breeds, selected for carcass characteristics, mated to crossbred ewes, chosen for maternal attributes. Previous experiments have shown that even where good quality terminal sires were used too high a proportion of finished lambs produced carcasses of moderate quality (Merrell, Webster and Ellis 1990; Merrell 1993). Ultimately, an improvement in the carcass attributes of crossbred ewes should help to alleviate this problem. A long term experiment which aims to compare the performance of crossbred ewes bred from two crossing-sire breeds was set up in 1989. During the first phase of this experiment (1989 - 1992) selected ewe lambs were retained to produce the two crossbred ewe flocks, surplus ewe lambs and all wether (castrated male) lambs were finished. Data are presented for finished wether lambs produced during this initial phase.

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.

scholarly journals 71 Effects of timing of supplementation during late gestation in Bos indicus-influenced beef cows on post-weaning growth, immunity, and carcass characteristics of steer progeny

2020 ◽  
Vol 98 (Supplement_2) ◽  
pp. 59-59
Author(s):  
Elizabeth Palmer ◽  
Marcelo Vedovatto ◽  
Juliana Ranches ◽  
Vinicius Gouvea ◽  
Rhaiza Oliveira ◽  
...  
Keyword(s):  
Bos Indicus ◽  
Carcass Characteristics ◽  
Beef Cows ◽  
Late Gestation ◽  
Experimental Unit ◽  
Carcass Quality ◽  
Diarrhea Virus ◽  
Randomized Design ◽  
Distillers Grain ◽  
Dried Distillers Grain

Abstract This study evaluated the growth, immunity, and carcass characteristics of beef steers born to cows offered dried distillers grains (DDG) at different timing during late gestation. Approximately 84 d before calving (d 0), 84 mature Brangus cows were stratified by BW and BCS (422 ± 42 kg; 5.0 ± 0.14) and allocated into 1 of 6 bahiagrass pastures (14 cows/pasture). Treatments were randomly assigned to pastures: 1) no prepartum supplementation (CON); 2) 1 kg/d DDG from d 0 to 84 (LATE84); or 3) 2 kg/d from d 0 to 42 (LATE42). Calves were weaned at 261 ± 23 d of age. At weaning, 38 steers were vaccinated against bovine viral diarrhea virus (BVDV-1) and parainfluenza-3 (PI-3) and transported to a feedlot facility. Steers were penned according to cow prepartum pasture distribution and fed a similar diet until slaughter (d 587). Data were analyzed as complete randomized design using MIXED procedure of SAS, pasture as the experimental unit, treatment as fixed effect, and pasture(treatment) and steer(pasture) as random effects. Steer feedlot BW, ADG, DMI, and G:F did not differ (P ≥ 0.12) among treatments. Plasma haptoglobin concentrations were greater (P ≤ 0.03) for LATE42 and LATE84 vs. CON steers 2 d after feedlot entry. Plasma cortisol and seroconversion for BVDV-1 and PI-3 did not differ (P ≥ 0.15) among treatments. The percentage of carcasses grading Choice did not differ (P = 0.13), but carcasses grading low Choice were greater (P = 0.03) for CON vs. LATE42, with LATE84 being intermediate (91, 40, and 58%, respectively). Thus, prepartum dried distillers grain supplementation to B. indicus-influenced cows did not enhance feedlot growth but had subtle positive impacts on carcass quality and innate immunity in steer progeny. In addition, timing of dried distillers grain supplementation (last 84 d vs. first 42 d of late gestation) did not impact steer post-weaning feedlot performance and carcass quality.

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