An assessment of immune and stress responsiveness in Holstein-Friesian cows selected for high and low feed conversion efficiency
作者： J. W. Aleri , B. C. Hine , M. F. Pyman , P. D. Mansell , W. J. Wales
DOI: 10.1071/AN15406
关键词: Hormone 、 Lactation 、 Environmental management system 、 Biology 、 Immune system 、 Animal science 、 Feed conversion ratio 、 Beef cattle 、 Significant negative correlation 、 Biotechnology 、 Antibody
摘要: The objective of this study was to assess the immune and stress responsiveness cows identified as extremely high low feed conversion efficiency phenotypes. utilised 16 Holstein-Friesian in their third fourth lactation, having either (n = 8) or efficiency. A commercial vaccine used induce measurable antibody- cell-mediated adaptive responses general responsiveness. Stress assessed by measuring changes plasma cortisol concentrations response yarding handling. No significant differences were observed between extreme phenotypes (P 0.343 0.546, respectively). However, results suggested that trended higher phenotype than counterparts 0.079) 48 h post-yarding negative correlation antibody-mediated (r –0.44, P 0.043) but not with 0.135, 0.309). This provides preliminary evidence selected for may have improved stress-coping abilities
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