Breeding for Efficient Phytate-phosphorus Utilization by Poultry
نویسندگان
چکیده
منابع مشابه
Supplemental phytase in diets for swine and poultry effectively improves phytate phosphorus utilization by these animals and reduces their fecal phosphorus excretion by up to
A. niger XP isolated from Vietnam produces very low amount of acidic phytase with optimal pH at 2.5 and 5.5. The phytase production of this strain was successfully improved through gene cloning and expression. A 1.4 kb DNA fragment containing the coding region of the phyA gene was amplified by PCR and inserted into the expression vector pPICZαA with a signal peptide αfactor, under the control o...
متن کاملImproved phytate phosphorus utilization by Japanese medaka transgenic for the Aspergillus niger phytase gene.
The inefficient digestion of phytate phosphorus by fish has created environmental concerns associated with phosphorus pollution from aquaculture production facilities. To further complicate this situation, phytate is known to chelate minerals and proteins, making them nutritionally unavailable. The enzyme phytase degrades phytate into inorganic phosphorus, which can be directly utilized by fish...
متن کاملPhytate utilization and phosphorus excretion by broiler chickens fed diets containing cereal grains varying in phytate and phytase content
Eighty, 12-day-old, male broiler chicks, were fed one of four diets to determine the effects of feeding grains varying in phytate phosphorus (P) and intrinsic phytase activity on ileal and excreta P digestibility and composition. The diets contained approximately 970.7 g grain kg−1 (maize, high fat–low lignin oat, normal barley or low-phytate barley) with the cereal supplying the sole source of...
متن کاملEnhancement of phosphorus utilization in growing pigs fed phytate-rich diets by using rye bran.
Some cereal by-products, such as bran, exhibit a high phytase activity that may enhance phytate P digestibility. This was studied in growing pigs fed a phytase-rich (1,200 IU/kg) diet containing 20% rye bran. The trial involved 12 animals; six were fed a control diet and six were fed a diet containing rye bran for 2 mo. Both diets contained the same levels of energy, protein, Ca (.7%) and total...
متن کاملEffectiveness of an experimental consensus phytase in improving dietary phytate-phosphorus utilization by weanling pigs.
Consensus phytase is a new biosynthetic, heat-stable enzyme derived from the sequences of multiple homologous phytases. Two experiments were conducted to determine its effectiveness, relative to inorganic P and a mutant enzyme of Escherichia coli phytase (Mutant-EP), in improving dietary phytate-P availability to pigs. In Exp. 1, 36 pigs (3 wk old, 7.00 +/- 0.24 kg of BW) were fed a low-P corn-...
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ژورنال
عنوان ژورنال: International Journal of Poultry Science
سال: 2010
ISSN: 1682-8356
DOI: 10.3923/ijps.2010.923.930