Effects of genetic group, pregnancy and age on carcass traits, meat quality and fatty acid profile in female sheep
Keywords:commercial cuts, fat content, meat breeds, ovines, Santa Ines, slaughter age
Background: Little information is available on carcass quality in nulliparous and primiparous ewes of different breeds and genetic groups. Objective: To evaluate the effect of genetic group, pregnancy, age and their interactions on carcass traits, meat quality and fatty acid profile in sheep. Methods: Eighty-five Santa Ines ewes and their crosses with Texel, Dorper and Ile de France, aged 12 month were bred with White Dorper rams to assess the influence of pregnancy on carcass composition and meat quality. After weaning, all ewes (nulliparous and primiparous) were fattened for slaughter at 21 months of age. A further 24 six to twenty one-month-old female lambs from the same genetic groups were included in the analysis to determine the fatty acid profile. Results: Genetic group affected muscle and fat weight as well as the eye muscle length. Fat weight, muscle and fat ratios, subcutaneous fat thickness and cooking loss were affected by pregnancy with nulliparous females being fatter. Meat purpose breeds such as Dorper, Texel and Ile de France showed better meat quality compared to the Santa Ines hair breed. Of the 19 identified fatty acids, saturated were present in greater quantities, especially stearic and palmitic. Omega-6 content was influenced by age and pregnancy. Conclusions: Younger and nulliparous females have better carcass quality in terms of fatty acid composition.
Aberle ED, Forrest JC, Gerrard DE, Mills EW. Principles of Meat Science. 4th ed. Dubuque (USA): Kendall Hunt; 2001.
Andrés S, Morán L, Aldai N, Tejido ML, Prieto N, Bodas R, Giráldez FJ. Effects of linseed and quercetin added to the diet of fattening lambs on the fatty acid profile and lipid antioxidant status of meat samples. Meat Sci 2014; 97:156-163.
Bligh EG, Dyer WJ. A rapid method of total lipid extraction and purification. Can J Biochem Physiol 1959; 37:911-917.
Brito MA, González FD, Ribeiro LA, Campos R, Lacerda L, Barbosa PR, Bergmann G. Composição do sangue e do leite em ovinos leiteiros do sul do Brasil: variações na gestação e na lactação. Cien Rural 2006; 36:942-948.
Burke JM, Apple JK. Growth performance and carcass traits of forage-fed hair sheep wethers. Small Rumin Res 2007; 67:264-270.
Calnan HB, Jacob RH, Pethick DW, Gardner GE. Factors affecting the colour of lamb meat from the longissimus muscle during display: The influence of muscle weight and muscle oxidative capacity. Meat Sci 2014; 96:1049-1057.
Costa RG, Batista ASM, Azevedo PSD, Queiroga RDCRD, Madruga MS, Araújo Filho JTD. Lipid profile of lamb meat from different genotypes submitted to diets with different energy levels. R Bras Zootec 2009; 38:532-538.
Cruz CAC, Santos-Cruz CL, Castilho CJC, Souza AO, Silva LB, Brito PN. Lipidic characterization of Santa Inês lamb shoulder. Food Sci Technol 2011; 31:508-516.
Daley CA, Abbott A, Doyle PS, Nader G, Larson S. A review of fatty acid profiles and antioxidant content in grass-fed and grain-fed beef. Nutr J 2010; 9:1-12.
Galvani DB, Pires CC, Wommer TP, Oliveira F, Kodayssi GPT, Griebler L. Postweaning growth of the non-carcass components of Texel crossbred lambs. R Bras Zootec 2010; 39:1558-1564.
Guimarães RCA, Macedo MLR, Munhoz CL, Filiu W, VianaLH, Nozaki VT, Hiane PA. Sesame and flaxseed oil: nutritional quality and effects of serum lipids and glucose in rats. Food Sci Technol 2013; 33:209-217.
Hartman L, Lago R. Rapid preparation of fatty acid methyl esters from lipids. Lab Pract 1973; 22:475-476.
Henchion M, McCarthy M, Resconi VC, Troy D. Meat consumption: Trends and quality matters. Meat Sci 2014;98:561-568.
Issakowicz J, Issakowicz ACKS, Bueno MS, Costa RLD, Geraldo AT, Abdalla AL, McManus C, Louvandini H. Crossbreeding locally adapted hair sheep to improve productivity and meat quality. Sci Agric 2018; 75:273-359.
Ito RH, Valero MV, Prado RM, Rivalori DC, Perotto D, Prado IN. Meat quality from four genetic groups of bulls slaughtered at 14 months old. Acta Sci Anim Sci 2012; 34:425-432.
Knight TW, Knowles SO, Death AF, Cummings TL, Muir PD. Conservation of conjugated linoleic, trans‐vaccenic and long chain omega‐3 fatty acid content in raw and cooked lamb from two cross‐breeds. New Zeal J Agr Res 2004; 47:129-135.
Landin AV, Castanheira M, Fioravanti MCS, Pacheco A, Cardoso MTM, Louvandini L, McManus C. Physical, chemical and sensorial parameters for lambs of different groups, slaughtered at different weights. Trop Anim Health Prod 2011; 43:1089-1096.
Lands WE. Fish, Omega 3 and human health. 2nd ed. Urbana (USA): AOCS Press; 2005.Lawrence TLJ, Fowler VR, Novakofski JE. Growth of farm animals. 3.ed. Wallingford (EN) CAB International; 2012.
Lazzaroni C, Giin S. Gabifia D. Evaluation of carcass and meat quality in cattle and sheep. Netherlands (HOL): Wageningen Academic Publishers; 2007.
Lôbo RNB, Pereira IDC, Facó O, McManus CM. Economic values for production traits of Morada Nova meat sheep in a pasture based production system in semi-arid Brazil. Small Rumin Res 2011; 96:93-100.
McCutcheon SN, Blair HT, Purchas RW. Body composion and organ weights in fleeceweight selected and control Romney rams. New Zeal J Agric Res 1993; 36:445-449.
McManus C, Hermuche P, Paiva SR, Melo CB, Mendes CQ. Geographical distribution of sheep breeds in Brazil and their relationship with climatic and environmental factors as risk classification for conservation. Braz J Sci Technol 2014; 1:1-15.
Nelson DL and Cox MM. Lehninger principles of biochemistry. New York (NY): W.H. Freeman; 2008.
Nozaki VT, Munhoz CL, Guimarães RDCA, Hiane PA, Andreu MP, Viana LH, Macedo MLR. Nutritional quality of oil and almond guarirova pulp. Cienc Rural 2012; 42:518-1523.
Pflanzer S, Felicio P. Effects of teeth maturity and fatness of Nellore (Bos indicus) steer carcasses on instrumental and sensory tenderness. Meat Sci 2009; 83:697-701.
Ponnampalam EN, Sinclair AJ, Egan AR, Blakeley SJ, Li D, LeuryBJ. Effect of dietary modification of muscle long-chain n-3 fatty acid on plasma insulin and lipid metabolites, carcass traits, and fat deposition in lambs. J Anim Sci 2001; 79:895-903.
Santos VAC, Cabo A, Raposo P, Silva JA, Azevedo KMT, Silva SR. The effect of carcass weight and sex on carcass composition and meat quality of “Cordeiro Mirandês”-Protected designation of origin lambs. Small Rumin Res 2015; 130: 136-140.
Santos-Silva J, Bessa RJB, Santos-Silva F. Effect of genotype, feeding system and slaughter weight on the quality of light lambs: II. Fatty acid composition of meat. Livest Prod Sci 2002; 77:187-194.
Sen AR, Santra A, Karim SA. Carcass yield, composition and meat quality attributes of sheep and goat under semiarid conditions. Meat Sci 2004; 66:757-763.
Simopoulos AP. The importance of the ratio of omega-6/omega-3essential fatty acids. Biomed Pharmacother 2002; 56:365-79.
Singh RB, DeMeester F, Wilczynka A. The tsim tsoum approaches for prevention of cardiovascular disease. Cardiol Res Pract 2010;2010:1-18.
Souza Júnior ELD, Sousa WHD, Pimenta Filho EC, Gonzaga Neto S, Cartaxo FQ, Cezar MF, Pereira Filho JM. Effect of frame size on performance and carcass traits of Santa Inês lambs finished in a feedlot. R Bras Zootec 2013; 42:284-290.
Ulbricht TLV,Southgate DAT. Coronary heart disease: seven dietary factors. Lancet 1991; 338: 985-992.
Waal HO, Combrinck WJ. The development of the Dorper, its nutrition and a perspective of the grazing ruminant on veld. Small Rumin Res 2000; 36:103-117.
Webb EC, De Smet S, Van Nevel C, Martens B, Demeyer DI. Effect of anatomical location on the composition of fatty acids in double-muscled Belgian Blue cows. Meat Sci 1998; 50:45-53.
Webb EC, O’Neill HA. The animal fat paradox and meat quality. Meat Sci 2008; 80:28-36.
Wood JD, Enser M, Fisher AV, Nute GR, Sheard PR, Richardson RI, Whittington FM. Fat deposition, fatty acid composition and meat quality: A review. Meat Sci 2008; 78:343-358.
Wood JD, Richardson RI, Nute GR, Fisher AV, Campo MM, Kasapidou E, Enser M. Effects of fatty acids on meat quality: a review. Meat Sci 2004; 66: 21-32.
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