Genotype effect on carcass and meat quality of lambs finished in irrigated pastures in the semiarid Northeastern Brazil

Júnior, Gerardo Alves Fernandes; Lôbo, Raimundo Nonato Braga; Madruga, Marta Suely; Lobo, A. M. B. O.; Vieira, L. S.; Facó, Olivardo

doi:10.1590/s0102-09352013000400037

Cited by 16 publications

(11 citation statements)

References 17 publications

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“…Therefore each breed has its own potential for growth and deposition of meat and fat. The values shown here are within the range reported in the literature for purebreds and crossbred in other finishing systems (Fernandes Júnior et al 2013. However, the focus of this work was to assess whether the slaughter groups randomly set by the breeder ensures homogeneity carcasses, cuts, yields, and quality.…”

Section: Resultssupporting

confidence: 75%

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Do carcasses of lambs finished on commercial production systems meet market standards?

Lôbo

Chaparro-Pinzón

Neto

et al. 2018

An. Acad. Bras. Ciênc.

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This study aimed to characterize a commercial lamb finishing system using animals of undefined breed from production to slaughter by analyzing performance, carcass traits, yield of commercial cuts, and the quality and meat acceptance of different slaughter groups, as to evaluate whether this system provides the market with a standardized product. The lots were not homogeneous for yield of commercial cuts and performance and morphometric traits evaluated in vivo. The groups were heterogeneous to 75% of the 13 carcass traits evaluated, among them, hot and cold carcass weights, hot and cold carcass yields, carcass grade finishing and biological yield. There was also no uniformity for the proportion of non-carcass components, morphometry of carcass, visual appraisals, and loin traits. On the other hand, homogeneity was achieved in physico-chemical and sensory traits, except for hardness and proportion of saturated, monounsaturated and polyunsaturated fatty acids. We conclude that the commercial finishing system with the use of undefined crossbred lambs does not produce carcass and cuts standardized to the market.

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Section: Resultssupporting

confidence: 75%

“…The homogeneity observed for this parameter showed that the groups produced similar subcutaneous fat amount which acted as insulation of the muscular mass. The losses by cooling reported are within the range for sheep in Brazil (Moura Neto et al 2014, Fernandes Júnior et al 2013.…”

Section: Resultssupporting

confidence: 63%

Do carcasses of lambs finished on commercial production systems meet market standards?

Lôbo

Chaparro-Pinzón

Neto

et al. 2018

An. Acad. Bras. Ciênc.

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“…Bishop (2012) recommends a selection based on phenotypic measurements such as performance under conditions of nematode challenge, number of eggs per gram and measures of anaemia, such as packed cell volume or FAMACHA © score. Since in Northeastern Brazil the base system for the sheep industry is the pasture, either native or cultivated, and the native breeds are the basis for the genetics population of sheep, being the Santa Inês, Brazilian Somalis and Morada Nova breeds, and the crossbred Dorper breed among the main genetic groups bred in this region (Fernandes Júnior et al, 2013), the aim of this study was to compare the performance of those genetic groups on traits related to growth and natural infection by endoparasites in a finishing system on an irrigated pasture.…”

Section: Introductionmentioning

confidence: 99%

Performance and parasite control of different genetic groups of lambs finished in irrigated pasture

Júnior

Lôbo

Vieira

et al. 2015

Arq. Bras. Med. Vet. Zootec.

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The aim of this study was to compare the following four genetic groups of hair sheep: Santa Inês (SI), Morada Nova (MN), Brazilian Somali (BS), and the F1 ½Dorper x ½Morada Nova crossbreed on traits related to growth and parasitic infection. Thirty-three male lambs of the same age and of simple birth, under the same pre-weaning management conditions were used in the experiment. After weaning the animals were housed in a completely randomized design in paddocks made of Panicum maximum cv. Tanzania. Along the course of the research, the performance of the four groups of sheep was observed to be negatively affected by gastrointestinal parasites, but there was a genotype effect to the average daily weight gain (ADWG), where the SI and F1 genotypes presented higher values. The effects of genotype, time and genotype x time interaction were significant in weight and corporal score (CS) measurements. The BS lambs had the highest CS values throughout the experiment despite not presenting greater weight gain when compared to the SI and F1 breeds. There were also significant effects of time and genotype x time interaction for packed cell volume (PCV) and FAMACHA © score (FAM) and only the time effect was significant in the total number of eggs per gram (EPG) and total plasma protein (TPP). The MN lambs showed higher PCV values and unlike the other groups, presented a FAMACHA © score below 3 and PCV above 23% even having a higher EPG tendency, especially in the initial phase, indicating a possible higher resilience to infection caused by gastrointestinal parasites.Keywords: hair sheep, weight gain, genotype effect RESUMO O objetivo deste estudo foi comparar quatro grupos genéticos de ovinos: Santa Inês (SI), Somalis Brasileira (SB), Morada Nova (MN) e ½ Dorper -½ Morada Nova (F1) quanto às características de crescimento e de infecção parasitária. Trinta e três cordeiros machos, de mesma idade, nascidos de parto simples e submetidos às mesmas condições de manejo pré-desmame foram utilizados no experimento. Após o desmame, os animais foram alojados em piquetes de capim

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“…The contrast between breed features and traits related to meat-producing ability, such Principal component analysis for evaluating a ranking method used in the performance testing in sheep of Morada Nova breed as average daily weight gain and loin eye area, appears to indicate that Morada Nova sheep show little specialization for meat production, which was previously observed by Fernandes Júnior et al (2013). This result was somewhat expected because Morada Nova is a relatively recent Brazilian locally adapted breed.…”

Section: Resultsmentioning

confidence: 75%

Principal component analysis for evaluating a ranking method used in the performance testing in sheep of Morada Nova breed

et al. 2015

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A multivariate approach was adopted to evaluate the relationship among traits measured in the performance testing of Morada Nova sheep, verify the efficiency of a ranking method used in these tests and identify the most significant traits for use in future analyses. Data from 150 young rams participating in five versions of the performance tests for the Morada Nova breed were used. Twenty traits were measured in each animal: initial weight (IW), final weight (FW), average daily weight gain (ADG), loin eye area (LEA), scrotal circumference (SC), fat thickness (FT), conformation (C), precocity (Pc), muscularity (M), breed features (BF), legs (L), withers height (WH), chest width (CW), rump height (RH), rump width (RW), rump length (RL), body length (BL), body depth (BD), heart girth (HG) and body condition scoring (BCS). The Pearson's correlation coefficients ranged from -0.10 to 0.93, with the highest correlations were between body weight variables and morphometric measurements. The three first principal components explained 72.28% of the total variability among all traits. The variables related to animal size defined the first principal component, whereas those related to visual appraisal and suitability for meat production defined the second and third principal components, respectively. The combination of traits from the principal component analysis showed that the ranking method currently used in the performance testing of Morada Nova sheep is efficient for selecting larger rams with better breed features and higher degrees of specialization for meat production.

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Genotype effect on carcass and meat quality of lambs finished in irrigated pastures in the semiarid Northeastern Brazil

Cited by 16 publications

References 17 publications

Do carcasses of lambs finished on commercial production systems meet market standards?

Do carcasses of lambs finished on commercial production systems meet market standards?

Performance and parasite control of different genetic groups of lambs finished in irrigated pasture

Principal component analysis for evaluating a ranking method used in the performance testing in sheep of Morada Nova breed

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