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    Feed & Nutrition

    New wheat strain could strengthen broilers’ legs

    Chloe RyanBy Chloe RyanApril 24, 20174 Mins Read
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    A study at Nottingham Trent University shows that specially-bred wheat could help provide some of the key nutrients essential for healthy bones in poultry, reducing the need to supplement the feed.  The wheat was originally identified and has been further characterised by Aarhus University.
     
    Scientists from the Department of Molecular Biology and Genetics at Aarhus University, who made the initial identification of the high-phytase wheat, have shown that wheat can be bred naturally to produce high levels of phytase – an enzyme needed to release phosphorous, which the bird requires to grow a healthy skeleton. 
     
    The wheat was tested on poultry in feed trials carried out at Nottingham Trent University’s Poultry Research Unit. 
     
    The poultry industry has been very successful in improving bird productivity, with growth rates increasing threefold over the last 50 years. In order to ensure that bird welfare is not compromised, however, particular attention has to be focused on ensuring that a healthy, well-developed skeletal frame is produced.
     
    Nutritionists have tackled this issue through supplements, to ensure the correct mineral balance in the diet. A key component is phosphorous, a mineral found in plant tissues, grains and oil seeds and which is vital for skeletal growth and maintenance. 
     
    However, not only is phosphorous supplementation very expensive but also the phosphorous, from plant sources, present in the feed of poultry and pigs has a very low bio-availability, being bound up in a plant substance called phytate. 
     
    Phosphorous bound in phytate can not be utilised by these monogastric animals because they have negligible amounts of the phytase enzyme in their gastrointestinal tract – which is needed to make the phosphorous from phytate bioavailable. 
     
    This anti-nutritional effect of phytate is estimated to cost animal producers up to £1.3bn a year. In addition to this, phytate-bound phosphorous which is excreted can have negative impact on the environment, such as via eutrophication. For the latest work, published in the journal Animal: An International Journal of Animal Bioscience, plant-breeding scientists from Aarhus University used their expertise to make it simple and efficient to breed wheat with naturally high levels of phytase. 
     
    Scientists in Nottingham Trent University’s poultry nutrition research team then designed and carried out a poultry nutrition trial to compare this new source of phytase to traditional poultry diet formulations. The trial shows that inclusion of the high phytase wheat in the feed is a highly effective way to unlock the phosphorous in the diet for use by the animal.
     
    ”Aiming for high phytase activity in wheat grains has been a key research target for many years,” said Dr Henrik Brinch-Pedersen, Group leader at Aarhus University’s Department of Molecular Biology and Genetics.
     
    He said: ”Reaching it was a milestone, but seeing that it works well in animal feeding is extremely satisfactory. A particularly exciting additional implication of this work may actually be for humans. 700 million people globally suffer anaemia partly caused by the high phytate content of their diet. Providing a variety of wheat that contains its own phytate-destruction enzyme could improve the population health of many nations.”
     
    Dr Emily Burton, Head of the Poultry Research Unit in Nottingham Trent University’s School of Animal, Rural and Environmental Sciences, added: ”It has been exciting to explore a completely different way of providing meat chickens with the phosphorous needed for healthy bones. 
     
    ”We will be looking to explore further the possibilities of wheat-derived phytase, as emerging research in this field shows the anti-nutritional effects of phytate in poultry extends far beyond locking away phosphorous. 
     
    Steve Wilson, Monogastric Nutritionist at the animal feed producers ForFarmers, said: ”Wheat is the predominant ingredient used in poultry diets and over 50% of all the wheat grown in the EU is used in the manufacture of animal feeds. If the naturally occurring level of phytase in this major cereal can be increased then it can make a significant economic contribution to our aim to improve the efficiency and sustainability of future feed production.”

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    Chloe Ryan

    Editor of Poultry Business, Chloe has spent the past decade writing about the food industry from farming, through manufacturing, retail and foodservice. When not working, dog walking and reading biographies are her favourite hobbies.

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