Enhancing Chicken Growth

The quest to optimize chicken growth has long been a focal point in the poultry industry, driving innovation and scientific discovery. Recent advancements in broiler genetics offer new insights into the mechanisms behind the rapid growth of modern chickens, shedding light on the genetic underpinnings of this remarkable phenomenon.

Broiler growth rates have witnessed significant improvements in recent decades, thanks to advancements in both genetics and nutrition. Researchers at the Poultry Science Department of Mississippi State University have been at the forefront of unraveling the genetic secrets that contribute to the impressive growth of broiler chickens.

Central to this research is the concept of genetic selection—a process akin to selective breeding in other animals. By carefully selecting and breeding chickens with desirable traits such as rapid growth and efficient feed conversion, breeders have been able to create strains of broilers that can reach market weight in record time.

A key component of this genetic selection process is the identification and utilization of specific genetic markers associated with desirable traits. Through meticulous breeding programs, scientists have been able to capitalize on the natural genetic variation present in chicken populations to enhance growth performance.

Moreover, the evolution of broiler genetics has been shaped by a deep understanding of quantitative genetics—the study of how traits are inherited and influenced by multiple genes. By leveraging this knowledge, researchers have been able to develop breeding programs that maximize the genetic potential of broiler chickens for growth and productivity.

In addition to genetic selection, advancements in nutrition have played a crucial role in supporting the rapid growth of modern chickens. Through extensive research, poultry nutritionists have formulated balanced diets that provide chickens with the nutrients they need to thrive and grow at optimal rates.

Contrary to common misconceptions, the impressive growth of modern chickens is not attributed to the use of hormones. In fact, hormone supplementation is illegal and not approved for use in poultry production in the United States. Instead, the remarkable growth of broilers is a testament to the power of genetic selection and advancements in nutrition.

The implications of these advancements extend beyond the poultry industry, offering valuable insights into the broader field of animal genetics and breeding. By unraveling the genetic mysteries behind chicken growth, researchers are not only enhancing the efficiency and sustainability of poultry production but also paving the way for future innovations in animal breeding and genetics.

In conclusion, the recent breakthroughs in broiler genetics offer a glimpse into the genetic mechanisms that drive the rapid growth of modern chickens. Through the careful application of genetic selection and advancements in nutrition, researchers are unlocking the genetic potential of broiler chickens, ushering in a new era of efficiency and productivity in poultry production.

Sources:

https://www.thepoultrysite.com/articles/why-the-rapid-growth-rate-in-todays-chickens#:~:text=Breeding%20scientists%20continue%20to%20select,and%20be%20very%20cost%2Defficient.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10031763/

The Cause of Chewy Chicken Meat!

The Cause of Chewy Chicken Meat!

Almost everyone eats chickens, and ever wonder why some chicken meat is soft and some hard and chewy? Recently published, the University of Delaware researchers have discovered that lipoprotein lipase in chicken may contribute to wooden breast syndrome. Lipoprotein lipase is an enzyme that is important for fat metabolism. For decades, researchers have been studying wooden breast syndrome in broiler chickens that involved with analyzed genes in the disease and the identified biomarker for the disorder. The researchers also explain the hardened breast tissue from these chickens.

How did these researchers find that lipoprotein lipase is the answer? The researchers know that breast muscle fibers in chicken reply on sugar, which is a glucose molecule for fuel and not fat molecules in this case. They use RNA sequencing to determine which genes expressed, and finally, they found evidence of lipoprotein lipase expressed in endothelial cells. Since fat oxidized for energy in the breast, it causes another excess release of the free radical molecule that modifies the terrible fats and protein, which then causes a problem for the chicken’s immune system. This eventually leads to hard and chewy chickens.


This is a useful finding that researchers were able to discover. This would help growers manage to be more cautious about what they feed or look over how the conditions of the chicken are before actually going into the market, processed for meat, or breeds that may result in economic losses or disease spreading.


https://www.sciencedaily.com/releases/2019/11/191120175613.htm
https://eurekalert.org/pub_releases/2019-11/uod-tco112019.php

How an ancient pope helped make chickens fat

Today, chicken is one of the most consumed meats around the world. People eat chicken in a variety of ways, ranging from chicken cordon bleu, chicken Caesar salad, and Chick-fil-A sandwiches. Chickens have been domesticated for years, but they were skinnier and less common as a food. In 2010, a worldwide study of the genomes of multiple populations of chickens showed that modern chickens had two copies of the dominant gene, thyroid stimulating hormone receptor (TSHR). This gene makes a protein that attaches to the thyroid stimulating hormone and controls the development and function of the thyroid. In chickens, the expression of TSHR contributes to their growth, reproduction, and metabolism. These chickens are not only larger but also they lay eggs more frequently.

A pair of modern chickens

Scientists found that all domesticated chickens have the two alleles of TSHR. The amount of domesticated chickens containing the TSHR gene spiked during the medieval era in Europe. This occurred due to the Benedictine reform in the United Kingdom. Religious fasting for Christians was required and eating four-legged animals was prohibited. However, two-legged animals were acceptable to eat. That is how chickens became widely consumed and bred. Over time, the fatter chickens that reproduced more eggs had the TSHR gene and the traits were passed down. 

Today, this genetic prevalence of the TSHR gene shows the human role in selection. Naturally, people wanted to eat the fatter chickens and the chickens who would lay eggs every day. Unbeknownst to us at the time, chickens who satisfied these "requirements" had the TSHR gene. As these chickens bred, they reproduced offspring who also had the dominant genetic traits. I think this evolution of chicken genomics is fascinating because it demonstrates how human decisions have impacted chickens today. The consumption of chicken following the Benedictine reform puts into perspective the correlation of the influence of artificial selection on modern genetics. 

Were Chickens Always on Our Menus?

      Simply for the reason that there are about 20 billion chickens around the world and they make up most of our meals (for carnivores) everyday, research on chickens is actually very important for society. Chicken is one of the most used sources of protein in the world as stated in the New York Times article. However, Dr. Larson, a professor at Oxford stated that according to all the evidence, chickens were not food for humans back in the day and were usually only used for rituals and cockfighting. Chickens were way less important in the diets of humans for thousands of years. In fact, the domestication of chickens by humans is about 7,000 to 10,000 years ago.

          The Arts and Humanities Research Council of Great Britain gave many academic organizations about $3 million including Dr. Larson to study this type of information. His focus is mainly on the genetics and biological evolution of chickens. Yet, he has to focus on the reason why humans even decided to domesticate chickens in the first place. Chickens were the first species in which the Mendelian inheritance was demonstrated. The domestication of animals turned into major selective breeding of chickens to enforce production of chickens with good genetics. Sound genetic programs brought about the achievement of massive egg and meat production around the world. Dr. Larson denotes the different relationship humans have with chickens today as a “loss.” Though back in the day chickens and humans in Austria had been sharing similar environments and diets, now humans view chickens as a major food source. It was really so interesting for me to research about the domestication of chickens considering I literally have chicken every single day in one of my daily meals. To know that humans used to view chickens as animals that simply happened to live in the same environment as them and not food is really just shocking because nowadays we can buy a meal that has chicken through a drive through !