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Poultry genetics and reproduction
Poultry breeding has been one of the most impactful advances in the last 100 years. The role that improved global production of eggs and poultry meat have in reducing global hunger and food insecurity is difficult to overstate. The vast majority of these improvements have come from genetic selection for improved feed efficiency, along with streamlining of the overall production system, and better understanding of poultry nutrition. While the industrial approach to poultry production has created a highly consistent and dependable food source the world over, several problems threaten the long term sustainability of this model - including musculoskeletal and metabolic disorders, welfare concerns, and the need to adapt to a changing climate. Researchers in poultry breeding and genetics utilize quantitative, population, and molecular genetic techniques to help understand the effects of selection for economically important traits and enhance genetic performance through changes in environment and management strategies.
INTRODUCTION Heritage chickens are important for breeders and industry to protect valuable genes and traits over the long term. However, 50% or more of the genetic diversity is absent in commercial pure lines (FAO, 2007; Muir et al., 2008). Therefore, preserving potentially valuable genes by conducting research with heritage breeds is important. Changes in live weight and proportional growth of body components as affected by genotype and environmental factors are defined as...
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New research from North Carolina State University has found that Campylobacter bacteria persist throughout poultry production – from farm to grocery shelves – and that two of the most common strains are exchanging...
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Fowl aviadenoviruses (FAdVs) are worldwide-distributed viruses and are the causative agents of the inclusion body hepatitis (IBH) in chickens (1). IBH is characterized by hepatic necrosis with microscopic eosinophil or basophilic intranuclear inclusion bodies in hepatocytes and mortality rates around 10% (2). FAdVs have been grouped into five species (FAdV-A to FAdV-E) on the basis of their genome structure and further divided into 12 serotypes (FAdV-1 to -8a and -8b to -11), based on a...
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I. INTRODUCTION The profitability of the egg industry at commercial farm level is influenced by key production traits such as feed consumption, feed efficiency and egg quality. These measures of profitability are primarily controlled by genetics, but are also influenced by environmental factors leading up to the onset of lay and beyond. Consequently, inconsistency in voluntary feed intake and hen body weight can result in variations in feed efficiency, egg production and egg...
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Background Avian influenza (AI) is an infectious viral disease that mainly affects the respiratory or digestive system. The avian influenza viruses (AIV) affect different species of wild and domestic birds [1]. They belong to the Orthomyxoviridae family, having a single stranded RNA genome composed of eight segments that code for more than 11 viral proteins. The Hemagglutinin (HA) and the neuraminidase (NA) genes code for the major virus surface glycoproteins [2]. Based on their...
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How did new poultry breed will be released by crossing local chicken with exotic with special emphasis on layer? ...
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The Relevance of Starch-Protein Digestive Dynamics in Crude Protein-Reduced Broiler Diets
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The International Conference on Poultry Intestinal Health is proud to announce the topic of the upcoming Virtual Event: "Applications of -omics technologies in poultry health and productivity: where are we now?" on April 22, 2021 from 1.00pm to 3.00pm CET (7.00 - 9.00 am Colombian time-GMT-5).
We are...
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INTRODUCTION Broiler hatching eggs can be stored at temperatures lower than ambient temperature before incubation, which is a common practice in commercial breeding farms and hatcheries. As per the variable market demand for 1-day-old parent stock chicks and the hatchery capacity, the duration of egg storage varies. Normally, commercial hatcheries set their eggs after 3 to 5 d of storage to minimize the negative effects of...
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Lost in the Market Uncertainty Caused by the Outbreak
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1. Introduction The male breeding broiler is the bird used to produce a fertile egg from which the future broiler will be fattened to obtain meat. The importance of the rooster lies in the dissemination of genetic progress to obtain, in its progeny, large muscle masses because during its reproductive stage it is responsible for the fertilization of 1000 to 2000 eggs [1]. Currently, due to the genetic improvements that have been carried out to obtain birds with large muscle...
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by Sam Shafer
When humans domesticate and breed an animal, they tend to select for a very specific trait. In laying hens, artificial selection for high egg production has led to hens that can produce 320 eggs a year. But could artificial selection have unintentionally altered hen brain morphology?
In a new study, published in the July issue of Poultry...
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BREEDER MANAGEMENT Breeder management may refer to pure line management, parent stock management, and grand parent stock management depending on the context. Although there may be small variations in management among these stocks some basics are common within layer breeder stocks and broiler breeder stocks. The main aim of the breeder management is to produce the more number of fertile eggs per pullet and increasing the hatchability by hygienic handling of the fertile eggs. One...
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1. Introduction Breeding programmes are designed to produce a broiler with high potential for growth, yield, and feed efficiency. These traits may compromise health status under husbandry designed to maximise this genetic potential, since there is a trade-off between growth- and health-related traits with responses to husbandry programmes, age, sex, and genetic line (Siegel et al., 2001). In this respect, it is well...
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by Sam Shafer
A new study published in Poultry Science® shows that body weight, residual feed intake, and feeding behavior traits are all highly heritable traits in Pekin ducks. The research, led by scientists at China Agricultural University and Beijing Golden Star Inc., may help guide the selection for certain feeding behaviors and further help producers improve feed efficiency in their flocks.
Pekin ducks are the leading breed of duck used for meat...
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1. Introduction Antimicrobial drugs have a prominent role within the veterinary and animal sciences as they have been used not only for therapeutic and preventive purposes, but also as growth promoters [1]. Although the European Union has banned the latter practice, it is unfortunately still common in other countries [2,3]. Tetracyclines are the main antimicrobial drugs currently in use for veterinary purposes. Sulfonamides and macrolides are the next most common...
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Modern genetics was conceived based on observations of heritable morphological traits of chickens. The next 100 years saw the development and application of quantitative genetics and molecular sciences, which has resulted in the many modern poultry products available in the marketplace. One must recognize that not only has the performance of poultry changed over time, but many other aspects of the world have also changed that affect production and performance...
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Introduction Outbreaks of infectious bursal disease (IBD), a significant contagious immunosuppressive disease of poultry, are still reported throughout the world despite efforts to control the disease through vaccination. Control efforts are complicated by the fact that the causative agent, infectious bursal disease virus (IBDV), an avibirnavirus consisting of two segments of double-stranded RNA [1], is subject to frequent genetic mutations, reassortment of genome segments, and...
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The chicken is a useful animal model for biological research and can be used to produce biopharmaceutical products that cannot be produced in mammalian bioreactor systems. Chicken meat and eggs derived from 70 billion chickens yearly are an important source of high quality protein, vitamins and minerals in the global economy. The ability to precisely edit the chicken genome to introduce or test genetic variants will aid the study of gene function, define combinatorial allelic contribution to...
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Introduction The poultry industry, more specifically, the broiler industry, plays a key role in the delivery of high quality protein and lipids to the world population. Per capita consumption of chicken meat of both developed and underdeveloped nations increased greatly from 1995 through 2005 (Scanes, 2007). This was, in part, because unlike red meats, there are no religious or cultural constraints associated with poultry meat consumption. Additionally, global prices of chicken...
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Background Avian coccidiosis impairs the growth and feed efficiency of infected chickens [1]. There were evidences that resistance to avian coccidiosis is associated with inheritance and coccidiosis resistant line could be established by selection [2]. The resistance to avian coccidiosis QTL has been identified near two microsatellite markers on chromosome 1 [3,4]. Associations between parameters of resistance to coccidiosis and single nucleotide polymorphisms (SNPs) in 3...
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