|Stipanovic, Robert - Bob|
Submitted to: Biotechnology International Symposium Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: 6/17/2011
Publication Date: N/A
Citation: N/A Interpretive Summary:
Technical Abstract: Cottonseed meal contains 33-43% protein. Since non-ruminants such as chickens convert food intake into body mass more efficiently than ruminants, it would be advantageous for Uzbekistan to be able to utilize cottonseed as a feed for chickens. This could provide additional protein to animal industries in Uzbekistan. However, the presence of gossypol, a compound that is toxic to non-ruminants, limits it use a feed for these animals. However, the toxicity of cottonseed meal differs in species and technological processes and depends on the total amount of gossypol present in the meal and on the ratio of gossypol enantiomers; the (+)-enantiomer is less toxic to animals than the (-)-enantiomer. Currently, we are breeding for plants that produce a low percentage of (-)-gossypol in seed. We conducted feeding experiments using 180 broiler chicks (ROSS-308 line) from one day of age and distributed these into three equal groups: group 1 – control [diet with 23.2% soybean meal (no cottonseed meal)], group 2 – (15% cottonseed meal, 8.2% soybean meal), and group 3 – (23.2% cottonseed meal). We analyzed the bird’s freeze dried liver, blood serum, breast, gizzard and thigh for total gossypol and for the ratio of (+)- and (-)-enantiomers. As expected, the maximal concentration of gossypol and the (+)-enantiomer was detected in the liver, which detoxifies noxious substances. We also found an increase of gossypol in the blood serum depending on the quantity of added cottonseed meal to the feed. However, very low levels of gossypol were detected in the breast, and thigh.