Navigation Links
Appetite genes are key to better diets for poultry, study shows

The welfare of poultry could be improved by a discovery about how chickens regulate their appetites.

Scientists have identified how a chicken's genetic make-up can affect the signals sent from its stomach to its brain that tell a chicken when it has had enough to eat.

Poultry farmers often have to restrict food for chickens because some birds are insensitive to feelings of fullness and can overeat, affecting their ability to reproduce.

The study could make it easier to develop methods to develop diets that reduce excess growth more naturally in these birds.

Researchers say that genetic differences, which affect when chickens recognise when they have had enough to eat, could date back thousands of years when chickens were first domesticated and breeds were selected for their size.

The research was carried out by The Roslin Institute at the University of Edinburgh.

Dr Ian Dunn, who led the study, said: "The findings shed greater light on food intake in birds and help us understand why some breeds in general the faster growing types of chickens are more insensitive to feelings of fullness than others."

The study, published in the American Journal of Physiology, Endocrinology and Metabolism, focused on a protein called cholecystokinin (CCK) that has a key role in sending signals linked to being full from the gut to the brain.

The researchers, funded by the Biotechnology and Biological Sciences Research Council, found that some birds were better equipped than others at recognising the protein, making them more effective in triggering signals of feeling full.

The study involved cross-breeding a fast-growing meat production strain of chicken with a relatively slow-growing, chicken. The researchers looked at how the protein was processed in both types of chickens and in the new cross breed.

They showed that reduced levels of protein that recognizes the fullness signal also affected the chicken's natural body weight.

Their findings back up the theory that, when poultry were domesticated thousands of years ago and bred for increased size, their appetite levels were changed. The study could also help inform research looking at appetite regulation in other animals.

Dr Dunn said: "All species regulate their appetites to make sure the amount of food taken in is just the right to maintain body weight and fat content. Our research has shown that there is genetic variation in the interpretation of biological signals sent relating to being full. This also affects what would be considered to be the natural body weight of chickens."


Contact: Tara Womersley
University of Edinburgh

Related biology news :

1. Appetite suppressant for scavenger cells
2. Low ghrelin -- reducing appetite at the cost of increased stress?
3. The appetite-suppressing effect of proteins explained
4. Genes may be reason some kids are picky about food
5. Researchers create map of shortcuts between all human genes
6. Sleator lab identifies single point mutation in Listeria monocytogenes
7. March of Dimes awards $250,000 to researcher who identified heart disease genes
8. 2 new genes linked to amyotrophic lateral sclerosis and related disorders
9. Scientists find surprising new influence on cancer genes
10. MBL scientists find genes linked to human neurological disorders in sea lamprey genome
11. Schizophrenia genes increase chance of IQ loss
Post Your Comments:
(Date:11/12/2015)... -- A golden retriever that stayed healthy despite having the ... a new lead for treating this muscle-wasting disorder, report ... MIT and Harvard and the University of São Paolo ... Cell, pinpoints a protective gene that boosts muscle ... Boston Children,s lab of Lou Kunkel , PhD, ...
(Date:11/10/2015)... LONDON , Nov. 10, 2015 /PRNewswire/ ... segmented on the basis of product, type, ... segments included in this report are consumables, ... this report are safety biomarkers, efficacy biomarkers, ... in this report are diagnostics development, drug ...
(Date:11/4/2015)... New York , November 4, 2015 ... to a new market report published by Transparency Market ... Share, Growth, Trends and Forecast 2015 - 2022", the global ... of US$ 30.3 bn by 2022. The market is ... the forecast period from 2015 to 2022. Rising security ...
Breaking Biology News(10 mins):
(Date:11/24/2015)... Nov. 24, 2015  Twist Bioscience, a company ... Leproust, Ph.D., Twist Bioscience chief executive officer, will ... on December 1, 2015 at 3:10 p.m. Eastern ... City. --> --> ... Twist Bioscience is on Twitter. Sign up to ...
(Date:11/24/2015)... 2015 Capricor Therapeutics, Inc. (NASDAQ: ... discovery, development and commercialization of first-in-class therapeutics, today announced ... is scheduled to present at the 2015 Piper Jaffray ... EST, at The Lotte New York Palace Hotel in ... . --> . ...
(Date:11/24/2015)... 24, 2015 According to two new studies, fewer ... is something that many doctors, scientists, and public health experts ... with fewer PSA tests being done, will there be more ... Dr. David Samadi, "Despite the efforts made in regards ... second leading cancer cause of death in men, killing approximately ...
(Date:11/23/2015)... ... 2015 , ... Noblis, Inc., a leading provider of science, technology, and strategy ... Intelligence Agency (NGA), has joined the Noblis NSP team as President of the organization. ... community and the private sector,” said L. Roger Mason, Jr., Ph.D. , Senior ...
Breaking Biology Technology: