Effect of sire breed on growth, carcass, and wool characteristics of lambs born to Merino ewes in New Zealand

Scales, G. H.; Bray, A. R.; Baird, David; O’Connell, D.; Knight, T. L.

doi:10.1080/00288233.2000.9513412

Cited by 36 publications

(25 citation statements)

References 12 publications

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“…The significant interactions between sire breed and supplementation level on SD and CV is thought to arise from the strong influence of the genetic make-up of lambs on nutrient partitioning pathways towards wool synthesis (Li, Oddy, & Nolan, 2008;Scales, Bray, Baird, O'Connell, & Knight, 2000). Genetic potential varies with lamb sire breed and sex; and have been shown to interact with lambs' diet to affect wool synthesis and wool quality traits (Malau-Aduli & Akuoch, 2012;Malau-Aduli, Holman, & Lane, 2012;Pitchford, 1992;Scales et al, 2000). Nevertheless, only SD and CV in White Suffolk-sired lambs and wethers were affected by these variations.…”

Section: Discussionmentioning

confidence: 99%

Effect of Spirulina (Arthrospira plantensis) Supplementation on Wool Quality in Purebred and Crossbred Merino Lambs Fed Pasture and Lucerne Hay Basal Diets

Holman¹,

Malau‐Aduli

2014

JAS

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This study investigated the effects of Spirulina (Arthrospira plantensis) supplementation level, basal diet, sire breed, and sex on wool quality parameters in purebred and crossbred Merino lambs. A total of 48 lambs, over two consecutive years (n=24 per year), was randomly allocated into Spirulina supplementation level (CONTROL, LOW, MEDIUM, HIGH) groups and balanced by sire breed (Black Suffolk, Dorset, Merino, White Suffolk) and sex (ewes, wethers). Lambs had ad libitum access to a basal diet of pasture and Lucerne hay, and had Spirulina supplement daily throughout the 42-day feeding trial, after a 21-day adjustment phase. Mid-side wool samples were removed from each lamb at the beginning and end of the feeding trial and commercially analysed for quality. The wool quality data were transformed into 'wool trait change over the feeding trial period' by the difference between the wool measurements at the beginning and end of the experiment prior to statistical analysis. Wool clean fleece weight (CFW) was significantly influenced by level of supplementation, basal diet and sex (P<0.05). Spirulina-supplemented lambs on Lucerne hay basal diet elicited higher CFW responses which increased with supplementation level. CONTROL lambs had the lightest CFW regardless of basal diet. Sire breed and sex variations were significant (P<0.05) as wool from Suffolk-sired lambs and ewes had the highest fibre diameter coefficient of variation (CV) and CFW, respectively. CV and fibre diameter standard deviation were the most affected wool traits by significant interactions between Spirulina supplementation level, sire breed and sex. It was concluded that Spirulina supplementation with Lucerne hay basal diet improves wool CFW without compromising wool fibre diameter, comfort factor and spinning fineness in dual-purpose prime lambs.

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Section: Discussionmentioning

confidence: 99%

Effect of Spirulina (Arthrospira plantensis) Supplementation on Wool Quality in Purebred and Crossbred Merino Lambs Fed Pasture and Lucerne Hay Basal Diets

Holman¹,

Malau‐Aduli

2014

JAS

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“…Kirton et al, (1984) reported that lamb DP increases with increasing live weight. Redrawn et al, (2000) and Scales et al, (2000) also reported that there was a positive effect of growth rate, FCR on dressing percentage of lamb. And there is no significant impact on body fat deposition by feeding pellet.…”

Section: Carcass Characteristicsmentioning

confidence: 94%

Effect of pellet from total mixed ration on growth performance, blood metabolomics, carcass and meat characteristics of Bangladeshi garole sheep

et al. 2017

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Six indigenous Bangladeshi Garole sheep (Ovis aries) (BW: 8±0.5 kg; Age: 1yr) were divided into two groups using a randomized block design to investigate the effect of total mixed ration (TMR) pellet feeding on growth parameter, blood metabolomics, carcass and meat characteristics. Control diet was composed of road side grass, rice straw, wheat bran, mustard oil cake, molasses, common salt which considered as loose total mixed ration (L-TMR) and treatment diet was pelleted form of L-TMR (P-TMR).In both the dietary treatments the animals were fed at 1.5 times of maintenance energy and protein requirement. P-TMR revealed a positive impact (p < 0.05) on live weight gain and feed conversion ratio than L-TMR. Total digestible nutrients (TDN) and digestible crude fibre (DCF) was significantly higher (p < 0.05) in P-TMR group whereas there was no significant difference (p < 0.05) in other digestible nutrients as well as plasma metabolites like plasma glucose, triglyceride, total cholesterol, HDL-cholesterol and LDL- cholesterol concentration between two dietary group. Dressing percentage and eye muscle area was significantly higher (p < 0.05) in P-TMR group but no significant difference was found between dietary treatments in term of disposition of body fat, proximate composition of mutton, all the sensory parameters except tenderness and overall acceptability. So, it could be concluded that, the P-TMR might be fed to sheep for better growth performance and higher meat production rather than production of functional mutton.Progressive Agriculture 28 (3): 222-229, 2017

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“…This could possibly be a reflection of the differences in scale and magnitude of hybrid vigour in these sire breeds. Scales et al (2000) found that Dorset and Suffolk crossbred lambs grew at a faster rate compared to other breeds. This trend in body growth probably contributed to the observed variation in wool CF.…”

Section: Effect Of Sire Breedmentioning

confidence: 90%

“…Casas et al (2005) evaluated Dorset, Finnsheep, Romanov, Texel, and Montadale breeds of sheep and found that the interactions between sire breeds were often due to changes in ranking as well as magnitude, indicating the importance of sire breed selection and superiority of individual rams. Thus, breed diversity is a valuable resource that can be managed to exploit individual and paternal genetic effects by using sire breeds to complement characteristics of crossbred ewes in terminal crossbreeding systems as a means of efficiently improving commercial lamb and wool production (Casas et al, 2005, Scales et al, 2000. Therefore, a comprehensive appraisal of breeds is critical in providing valuable information that determines the appropriate use of breeds in crossbreeding systems to meet specific production environments and marketing goals (Casas et al, 2005).…”

Section: ) Ns=non-significant Cv=coefficient Of Variation Of Fibmentioning

confidence: 99%

“…This trend in body growth probably contributed to the observed variation in wool CF. Lower CF in lambs sired by Texel can be attributed to the fact that Texel sheep are well known for their ability to produce progeny with lean carcasses (Scales et al, 2000), therefore, Texel seemed to channel the partitioning of their absorbed nutrients towards muscle growth rather than wool fineness, hence the lower CF.…”

Section: Effect Of Sire Breedmentioning

confidence: 99%

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Sire Genetics, Protein Supplementation and Gender Effects on Wool Comfort Factor in Australian Crossbred Sheep

Aduli

2012

AJEA

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Aims: To investigate the effects of sire genetics, nutrition, level of supplementation, gender and their interactions on wool comfort factor (CF) and its correlation with other wool quality traits in crossbred sheep either grazing or supplemented with dietary protein. Study design:A 5 x 2 x 2 x 2 factorial experimental design comprising five sire breeds, two dietary protein sources, two supplementation levels and two sexes respectively, was utilized. Place and Duration of Study: University of Tasmania Farm, Cambridge, Hobart, Tasmania, Australia, between April 2008 and November 2010. Methodology: Texel, Coopworth, White Suffolk, East-Friesian and Dorset sires were joined with 500 Merino ewes at a mating ratio of 1:100 in individual paddocks. Five hundred of the crossbred progeny were raised on pastures until weaning at 12 weeks of age. Forty of the weaners with an initial body weight (BW) range of 23-31 kg (average of 27 ± 3.2 kg) were fed with lupins or canola at 1 or 2% BW for 6 weeks in individual metabolic crates. CF and other wool quality traits were commercially measured at the Australian Wool Testing Authority, Melbourne. The data were analyzed in SAS using MIXED model procedures with sire fitted as a random effect, while sire breed, nutrition, supplement, level of supplementation and gender and their interactions were fitted as fixed effects. Results: CF was significantly correlated with fiber diameter (-0.89), spinning fineness (-0.95) and wool curvature (0.33). Grass-fed sheep produced wool with significantly higher comfort factor (93.1±0.3%) than supplemented sheep (CF=85.9±1.1%). Sire genetics was a significant source of CF variation; White Suffolk crosses had the highest CF (90.1±8.7) and East-Friesian crosses the least (81.5 ± 10.1%). Males fed canola at 1%BW had the highest CF (90.8 ± 7.0%), while females fed lupins at 1% BW had the least (81.1±10.8%). Conclusion: From a practical point of view, sheep farmers engaging in prime lamb production with wool comfort factor as an additional breeding objective should concentrate Research ArticleAmerican Journal of Experimental Agriculture, 2(1): 31-46, 2012 32 their effort on grass-feeding White Suffolk x Merino wethers. During the winter feed gap, supplementing the wethers with canola at 1% BW will not compromise wool CF.

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Effect of sire breed on growth, carcass, and wool characteristics of lambs born to Merino ewes in New Zealand

Cited by 36 publications

References 12 publications

Effect of Spirulina (Arthrospira plantensis) Supplementation on Wool Quality in Purebred and Crossbred Merino Lambs Fed Pasture and Lucerne Hay Basal Diets

Effect of Spirulina (Arthrospira plantensis) Supplementation on Wool Quality in Purebred and Crossbred Merino Lambs Fed Pasture and Lucerne Hay Basal Diets

Effect of pellet from total mixed ration on growth performance, blood metabolomics, carcass and meat characteristics of Bangladeshi garole sheep

Sire Genetics, Protein Supplementation and Gender Effects on Wool Comfort Factor in Australian Crossbred Sheep

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