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1 results

  • Effects of FABP4 variation on milk fatty-acid composition for dairy cattle grazed on pasture in late lactation

  • Yunhai Li, Huitong Zhou, Long Cheng, Miriam Hodge, Jenny Zhao, Rosy Tung, Grant Edwards, Jonathan Hickford
  • Journal:
    Journal of Dairy Research / Volume 87 / Issue 1 / February 2020
    Published online by Cambridge University Press:
    31 January 2020, pp. 32-36
    Print publication:
    February 2020

  • This research communication describes associations between variation in the fatty acid binding protein 4 gene (FABP4) and milk fat composition in New Zealand Holstein-Friesian × Jersey cross dairy cows. After correcting for the effect of the amino acid substitution p.K232A in diacylglycerol O-acyltransferase 1 (DGAT1), which is associated with variation in many milk fatty acid (FA) component levels, the effect of FABP4 c.328A/G on milk FA levels was typically small. For the five genotypes analysed, the AB cows produced more medium-chain fatty acids than CC cows (P < 0.05), and more C14:0 FA than AA and AC cows (P < 0.05). The AA and AC cows produced less C22:0 FA (P < 0.01) than the BC cows, and the AC cows produced more C24:0 FA (P < 0.05) than was produced by the BC cows. Cows of genotype CC produce more long-chain fatty acids than cows of genotype BC (P < 0.05).