Effects of genetic group, pregnancy and age on carcass traits, meat quality and fatty acid profile in female sheep

  • Geisa IF Esteves Instituto Federal Catarinense
  • Vanessa Peripolli Instituto Federal Catarinense
  • João BG Costa Jr Faculdade Patos de Minas
  • Candice B Tanure Universidade de Brasília
  • Adriana M Menezes Universidade de Brasília
  • Jurandir R Souza Universidade de Brasília
  • Liris Kindlein Universidade Federal do Rio Grande do Sul
  • Guiomar P Bergmann Universidade Federal do Rio Grande do Sul
  • Helder Louvandini Universidade de São Paulo
  • Concepta McManus Universidade de Brasília
Keywords: commercial cuts, fat content, meat breeds, ovines, Santa Ines, slaughter age

Abstract

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.

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Author Biographies

Geisa IF Esteves, Instituto Federal Catarinense

Instituto Federal Catarinense, Campus Rio do Sul, Rio do Sul, Santa Catarina

Vanessa Peripolli, Instituto Federal Catarinense
Instituto Federal Catarinense, Campus Araquari, Araquari, Santa Catarina, Brasil.
João BG Costa Jr, Faculdade Patos de Minas
Faculdade Patos de Minas, Patos de Minas, Minas Gerais, Brasil.
Candice B Tanure, Universidade de Brasília
Programa de Pós-graduação em Ciências Animais, Faculdade de Medicina Veterinária, Universidade de Brasília, Brasília, Distrito Federal, Brasil
Adriana M Menezes, Universidade de Brasília

Programa de Pós-graduação em Ciências Animais, Faculdade de Medicina Veterinária, Universidade de Brasília, Brasília, Distrito Federal, Brasil

Jurandir R Souza, Universidade de Brasília
Instituto de Química, Universidade de Brasília, Brasília, Distrito Federal, Brasil.
Liris Kindlein, Universidade Federal do Rio Grande do Sul
Faculdade de Medicina Veterinária, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brasil.
Guiomar P Bergmann, Universidade Federal do Rio Grande do Sul
Faculdade de Medicina Veterinária, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brasil.
Helder Louvandini, Universidade de São Paulo
Centro de Energia Nuclear na Agricultura, Universidade de São Paulo, Piracicaba, São Paulo, Brasil.
Concepta McManus, Universidade de Brasília
  • Programa de Pós-graduação em Ciências Animais, Faculdade de Medicina Veterinária, Universidade de Brasília, Brasília, Distrito Federal, Brasil
  • Instituto de Biologia, Universidade de Brasília, Brasília, Distrito Federal, Brasil
Published
2019-03-27
Section
Original research articles