Lipid fraction quality of milk produced by Minhota (Portuguese autochthonous breed) compared to Holstein Friesian cow's

Authors

  • Heryka MM Ramalho,

    1. REQUIMTE/Departamento de Ciências Químicas, Faculdade de Farmácia da Universidade do Porto, 4050-313 Porto, Portugal
    Search for more papers by this author
    • Both authors contributed equally to this paper.

  • Sílvia D Campos,

    1. REQUIMTE/Departamento de Ciências Químicas, Faculdade de Farmácia da Universidade do Porto, 4050-313 Porto, Portugal
    Search for more papers by this author
    • Both authors contributed equally to this paper.

  • Susana Casal,

    1. REQUIMTE/Departamento de Ciências Químicas, Faculdade de Farmácia da Universidade do Porto, 4050-313 Porto, Portugal
    Search for more papers by this author
  • Rui Alves,

    1. REQUIMTE/ESTG, Instituto Politécnico de Viana do Castelo, 4900-348 Viana do Castelo, Portugal
    Search for more papers by this author
  • Maria Beatriz PP Oliveira

    Corresponding author
    1. REQUIMTE/Departamento de Ciências Químicas, Faculdade de Farmácia da Universidade do Porto, 4050-313 Porto, Portugal
    • REQUIMTE/Departamento de Ciências Químicas, Faculdade de Farmácia da Universidade do Porto, Rua de Jorge Viterbo Ferreira no. 228, 4050-313 Porto, Portugal.
    Search for more papers by this author

Abstract

BACKGROUND: Minhota and Holstein Friesian cows (15 from each breed) were selected from several farms located in the north of Portugal, all under similar feeding regime. Milk samples from individual cows were collected once a month, during one year, to take into account different lactation stages and feeding seasonal changes.

RESULTS: Holstein milk was found to have higher content of total polyunsaturated fatty acids, omega-6, and trans fatty acids, while Minhota milk had significantly higher monounsaturated fatty acids content. No statistical differences were observed for omega-3 and saturated fatty acids contents, mostly due to the high dispersion observed in Minhota milk samples. The average amount of conjugated linoleic acid was higher in Minhota breed, but the high dispersion of values reduced the statistical significance. Cholesterol content, expressed as mg kg−1 of fat, was higher in Holstein than in Minhota milk.

CONCLUSION: The results indicate that Minhota milk has important nutritional qualities that deserve attention, but the wide individual variation found within animals from this breed suggests a high genetic variability. Following this, the selection of some of these animals for intensive milk production could improve milk quality. Copyright © 2012 Society of Chemical Industry

Ancillary