The effect of threonine on mucin2 gene expression, intestinal histology and performance of broiler chicken
Threonine needs based on <em>Ross</em> manuals might be 14% of the National Research Council (NRC) recommendation, thus the effect of threonine on <em>mucin2</em> gene expression, histological characteristics and performance were evaluated in Ross male broilers fed diets cont...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2011-04-01
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| Series: | Italian Journal of Animal Science |
| Subjects: | |
| Online Access: | http://www.aspajournal.it/index.php/ijas/article/view/1827 |
| Summary: | Threonine needs based on <em>Ross</em> manuals might be 14% of the National Research Council (NRC) recommendation, thus the effect of threonine on <em>mucin2</em> gene expression, histological characteristics and performance were evaluated in Ross male broilers fed diets containing 0.8% (NRC requirement), 0.87% (average of NRC and Ross requirement), 0.94% (Ross requirement) and 1.01% (more than Ross requirement) total threonine. The dietary treatments consisted of an isonitrogenous corn-soybean meal-based diet with incremental levels of threonine. At the first day of chicken age, 24 pens were equalized to 12 birds per pen, in a completely randomized design and dietary treatments were randomly distributed for the 14-d period. Live performance measurements improved (P<0.05) as dietary threonine increased from 0.8% to 0.87%. The least performance was related to diet containing 1.01% threonine. Histological assays showed that villi height, crypt depth and villi surface increased as dietary threonine increased from 0.8% to 0.87% and decreased in 0.94% and 1.01% threonine. There was no effect of threonine on <em>mucin2</em> gene expression and goblet cells density. According to these results, threonine needs in starter period in Ross (308) broilers is more than NRC recommendation. |
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| ISSN: | 1594-4077 1828-051X |