Association of wool growth with gut metabolism and anatomy in sheep

作者: I. De Barbieri , R.S. Hegarty , L. Li , V.H. Oddy

DOI: 10.1016/J.LIVSCI.2014.12.018

关键词: BiologyWoolGut fermentationAnatomyGenetic meritNutrientLive weightComputed tomographyGut metabolismGenotype

摘要: Abstract The hypothesis tested by this study was that sheep with divergent estimated breeding values (EBV) for fleece weight differ in gut metabolism and anatomy; regardless of the level intake. Adult Merino wethers contrasting EBVs were fed at two levels intake 7-week periods a crossover design, where wool growth, anatomy evaluated. Regardless intake, genotype affected growth (P 0.05). Increases increased supply nutrients to animal measured end-products process (wool production, live weight, methane) independent genotype. results obtained indicate differences fermentation are not major cause production among different genetic merit when restricted intakes.

参考文章(43)
J. V. Nolan, H. Dove, M. Freer, Nutrient requirements of domesticated ruminants. Nutrient requirements of domesticated ruminants.. ,(2007)
J. Dijkstra, J.M. Forbes, Quantitative Aspects of Ruminant Digestion and Metabolism, second edition CAB International. ,(2005)
R. I. Mackie, C. S. McSweeney, A. V. Klieve, Microbial ecology of the ovine rumen Sheep Nutrition. pp. 71- 94 ,(2002) , 10.1079/9780851995953.0071
P. I. Hynd, D. G. Masters, Nutrition and wool growth. Sheep Nutrition. pp. 165- 187 ,(2002) , 10.1079/9780851995953.0165
EN Bermingham, NR Adams, JC Greeff, SM Liu, Briegel, Undesirable biological correlates of sheep with a high genetic value for clean fleece weight. Application of new genetic technologies to animal breeding. Proceedings of the 16th Conference of the Association for the Advancement of Animal Breeding and Genetics, Noosa Lakes, Queensland, Australia, 25-28 September, 2005.. pp. 373- 376 ,(2005)
A.C. Schlink, Norm Adams, S. Hatcher, Extreme wool production - implications for fitness Wool meets meat: tools for a modern sheep enterprise. Proceedings of the 2006 Australian Sheep Industry Cooperative Research Centre Conference, Orange, Australia. ,vol. 54, pp. 44- 48 ,(2006)
K. A. Johnson, D. E. Johnson, Methane emissions from cattle. Journal of Animal Science. ,vol. 73, pp. 2483- 2492 ,(1995) , 10.2527/1995.7382483X
F. E. M. Haynes, P. L. Greenwood, M. B. McDonagh, V. H. Oddy, Myostatin allelic status interacts with level of nutrition to affect growth, composition, and myofiber characteristics of lambs. Journal of Animal Science. ,vol. 90, pp. 456- 465 ,(2012) , 10.2527/JAS.2011-4452