Effects of the FecXR allele of BMP15 gene on the birth weight, growth rate and carcass quality of Rasa Aragonesa light lambs

Roche, A.; Ripoll, G.; Joy, M.; Folch, J.; Doblado, Begoña Panea; Calvo, J.H.; Alabart, J. L.

doi:10.1016/j.smallrumres.2012.06.011

Cited by 8 publications

(8 citation statements)

References 50 publications

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“…The subcutaneous fat of 10-kg carcasses of Rasa Aragonesa lambs fed with concentrates in a previous study had L* and C Ã ab values Roche et al 2012) similar to the ones reported here, and these values correspond to white fat according to the EU classification. Renal fat has higher L* and lower h ab values and is more prone to the deposition of carotenoid pigments than subcutaneous fat, as reported by Ripoll et al (2012).…”

Section: Discussionsupporting

confidence: 87%

“…However, these breeds cannot easily increase in fatness from this point according to the present results. However, 11-kg Rasa Aragonesa carcasses had greater amounts of renal fat (Roche et al 2012;Ripoll et al 2014) than did Ojinegra de Teruel carcasses in the present study. This increase in subcutaneous fat but not in renal fat is convenient since the subcutaneous fat protects the carcass from cold shortening, and renal fat is not an edible part of the lamb.…”

Section: Discussioncontrasting

confidence: 70%

“…However, these carcasses have a similar degree of fatness and renal fat content compared with values for Manchega suckling lamb carcasses between 10 kg and 12 kg (Miguel et al 2007). Suckling lambs of the same breed with a carcass weight of 6 kg had a fatness score of 4 on a 5-point scale (Ripoll-Bosch et al 2012b), whereas 5-kg, 10-kg and 11-kg carcasses of Rasa Aragonesa lambs had lower degrees of fatness (Martínez-Cerezo et al 2005;Roche et al 2012).…”

Section: Discussionmentioning

confidence: 96%

“…All the carcasses in the present experiment were classified as pale pink according to the UE classification of the M. rectus abdominis. The 10-kg and 11-kg carcasses of Rasa Aragonesa were classified as pink because they had high lightness and low chroma values (Ripoll et al , 2014Roche et al 2012;Lobón et al 2017). When the range of carcass weights is wide, there is a clear change in the visually detectable colour of the M. rectus abdominis (Sanz et al 2008).…”

Section: Discussionmentioning

confidence: 99%

“…The degree of fatness was estimated following the Community scale (EEC 1992) as 1 (low), 2 (slight), 3 (average) or 4 (high), with each level of the scale expanded to three values (1À, 1, 1+; 2À, 2, 2+; 3À, 3, 3+; and 4À, 4, 4+). Hence, fatness was scored from 1 to 12 (Roche et al 2012).…”

Section: Sampling and Carcass Measurementsmentioning

confidence: 99%

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The effect of carcass weight on fatness and muscle and fat colour of male Ojinegra de Teruel light lambs

et al. 2019

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This study aimed to evaluate the effects of increases in lamb carcass weight in 1-kg steps from 8 to 11 kg on carcass fatness, muscle colour, subcutaneous and renal fat colour, tissue composition of the thoracic limb, and intramuscular fatty acid composition. Sixty-two carcasses from Ojinegra de Teruel male lambs fed concentrates ad libitum and barley straw were used. Both carcass scores and renal fat weight increased with carcass weight (P = 0.0001), but the percentage increase in renal fat weight was twice that of fat scores. Renal fat was prone to store carotenoids earlier than caudal fat, resulting in increased chroma. With increasing carcass weight, muscle colour became less light (decreased L* (P = 0.0001) and an increased in chroma scores (P = 0.001). Increments of 1 kg of carcass weight led to noticeable changes in the M. rectus abdominis colour, except at the increment from 10 kg to 11 kg. Slaughtering lambs at light weights was found to be advisable because renal fat is not a valuable part of the carcass. The lean percentage of the thoracic limb did not increase with carcass weight, as the increased muscle:bone ratio (P = 0.0001) was offset by an increased fat percentage (especially the intermuscular fat %). Changes with increasing carcass weight in the proportions of the main fatty acids in intramuscular fat were small. Moreover, intramuscular fat did not change in quantity or quality. However, when selling carcasses at heavier weights is preferred, achieving carcasses of 11 kg rather than 10 kg was found to be advisable because the deposition of fat in both was similar. Breeds that deposit fat earlier than the breed used in this study should be fed low-energy diets to improve carcass quality. This feeding strategy could also be considered if fat deposition differs between sexes.

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Section: Discussionsupporting

confidence: 87%

Section: Discussioncontrasting

confidence: 70%

Section: Discussionmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 99%

Section: Sampling and Carcass Measurementsmentioning

confidence: 99%

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The effect of carcass weight on fatness and muscle and fat colour of male Ojinegra de Teruel light lambs

et al. 2019

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Effects of finishing period length with vitamin E supplementation and alfalfa grazing on carcass color and the evolution of meat color and the lipid oxidation of light lambs

et al. 2013

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Effects of concentrates rich in by-products on growth performance, carcass characteristics and meat quality traits of light lambs

et al. 2019

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The effects of feeding concentrates with alternative ingredients to cereal and soybean meal on growth performance, carcass characteristics and meat quality traits of feedlot lambs were studied. A total of 105 non-castrated male lambs were randomly assigned to one of three treatments (5 replicates per treatment): Control (CON, similar to commercial concentrates), Camelina (CAM, where camelina meal replaced 50% of the crude protein from the soybean meal in the CON concentrate), and Fibrous (FIB, concentrate without cereals and soybean meal, with camelina meal in addition to several by-products, and 20% less energy). The CAM treatment performed as well as the CON one. The FIB treatment increased feed conversion rate and tended to improve the redness and the oxidative stability. The CAM and FIB were economically more favourable. We found that a concentrate for feedlot lambs based on alternative ingredients, including several by-products, could be a feasible alternative to typical cereal-soybean meal-based concentrates.

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Effects of the FecXR allele of BMP15 gene on the birth weight, growth rate and carcass quality of Rasa Aragonesa light lambs

Cited by 8 publications

References 50 publications

The effect of carcass weight on fatness and muscle and fat colour of male Ojinegra de Teruel light lambs

The effect of carcass weight on fatness and muscle and fat colour of male Ojinegra de Teruel light lambs

Effects of finishing period length with vitamin E supplementation and alfalfa grazing on carcass color and the evolution of meat color and the lipid oxidation of light lambs

Effects of concentrates rich in by-products on growth performance, carcass characteristics and meat quality traits of light lambs

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