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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.
The parents of broilers are defined as broiler breeders. In contemporary poultry industry practices, there are many selection criteria for broiler breeders. Beyond selecting for future broilers, maximizing broiler breeder characteristics (i.e. reproductive success) is also important. In essence, we are not only selecting for...
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Background & Objectives Korean Native Chicken (KNC) market field keeps enlarging by the increasing consumer interest on KNC due to the desired flavor, texture and healthy value of its meat. Despite the demand for native chickens increasing due to the requirement for diversification of consumers, making good KNC layer species to meet the demand of consumers is very limiting. It is necessary to secure and maintain the various the pure-line in order to improve production...
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INTRODUCTION The production performance of laying hens during their late laying period is rapidly decreasing. This late period represents nearly 50% of the whole laying period, and laying hens are generally eliminated at about 500 days of age. However, laying hens still maintain a laying rate of 60-70% at this time; therefore, the production performance of flocks during this late laying period directly affects the economic benefits of farmers. Therefore, prolonging the...
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INTRODUCTION Amino acids (AA) and crude protein (CP) intake during the rearing phase in broiler breeders have demonstrated to affect body composition and reproductive performance in the laying period (Joseph et al., 2000; Ciacciariello and Tyler, 2013; van Emous et al., 2013, 2015a, 2015b). Modifications of these nutrients added up to the adjustment of feed allocation may alter BW (van Emous et al., 2013; Soumeh et al., 2018), organ development (Lesuisse et al., 2017), egg...
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Edgar Oviedo-Rondón (NC State University) discusses the importance of amino acids and how to find the proper levels to achieve better growth and development....
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Feed Conversion Ratio: Unveiling the Secrets of Sustainable Livestock Production
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The breeding performance is count upon the reproductive status of birds. In current poultry industry there are numerous challenges for reproductive competency. Many of these problems originated from upgrading body growth rate and egg production traits in poultry; which results weakening in reproductive characteristics. The continuous trend towards high yielding and fast growing birds ensuring that task of managing the breeder stock will not be easy more. Males...
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Famatta Perry (University of Delaware) presents her poster on gene expression analysis, during the Symposium on Gut Health in St. Louis, USA....
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Introduction The influence of seminal plasma on sperm storage may vary among species. Its removal is recommended in the majority of semen cryopreservation protocols of species such as caprine in order to ensure maximal sperm viability [1], but it isn’t entirely recommended in other mammals (e.g. ovine; [2]). Mammalian seminal plasma may contain factors that influence resistance of sperm to cold-shock damage and may prevent cryoinjury [3–5]. Conversely, detrimental...
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I. INTRODUCTION The chicken meat industry has made tremendous production gains through advanced utilisation of genetic selection and nutritional understanding to ensure that chicken meat remains a low cost, desirable product that consumers continuously demand (Zuidhof et al., 2015). The industry now requires new approaches to further advance efficiency and production, with developmental programming at the forefront of industry development (Hynd et al., 2016). Developmental...
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I. INTRODUCTION The recognition in the late 1960’s that excessive growth rates in broiler breeders were negatively impacting rate of lay and increasing production of unsettable eggs (Jaap and Muir, 1968) has been one of the most transformative events in the history of the hatching egg industry. The resultant feed restriction programs during rearing resolved the issue at the time. But continued genetic progress resulted in feed restriction being necessary throughout...
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AMINODat® 6.0 The most extensive web-based database for animal nutritionists
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Introduction Several factors can influence animal production, which can be beneficial or harmful to each species. In addition to the ambience, nutrition and sanity, the genetic characteristics of the breeds/lineages also cause changes in the adaptation and performance of the animals (Azevedo, Fosse Filho, Pereira, Andrade, & Júnior, 2016). In the current market there are three genetic groups of poultry according to their ability to produce: heavy poultry, light laying...
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INTRODUCTION Housing systems and mating strategies have become a global focus of concern as these are being referred one of the most cogent factors in overall performance of broiler parent stock (PS) in progressive poultry (Whitehead et al., 2016). Hence, now a days, the scientists are striving to probe the exact impact of keeping place of birds on their productive and reproductive performance. Despite of many advantages and disadvantages, two housing systems i.e., floor and...
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Rick van Emous, Ph.D., Senior Researcher in Animal Nutrition at Wageningen Livestock Research (Netherlands), shares some recommendations to reduce the negative effects of feed restriction on bird behaviour and welfare...
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One way to improve efficiency is to optimize the nutrition and management of the breeder hen by optimizing its reproduction and the performance of the progeny. Hear what Mercedes Vázquez-Añón, Ph.D., Senior Director of Strategic Initiatives and Account Collaboration at Novus International, has to say about it...
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Background For many years the commercial broiler industry has focused on genetic selection for economically important traits such as rapid gain of muscle mass, decreased time from hatch to market, and increased feed efficiency. Undoubtedly, this strategy has resulted in the development of a chicken genotype with superior growth characteristics, but history has shown that intensive genetic selection in meat type poultry for production traits will inevitably lead to occurrence of...
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1. Introduction Newcastle disease (ND) is a highly contagious avian disease with a significant impact on global poultry production. ND is caused by the Newcastle disease virus (NDV), formerly known as Avian orthoavulavirus 1 (AOAV-1), belonging to the family Paramyxoviridae (https://talk.ictvonline.org/taxonomy/ accessed on 20 October 2021). The genome of NDV is single-stranded, non-segmented, negative-sense RNA encoding six structural proteins: nucleocapsid protein (NP),...
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Infectious laryngotracheitis is an avian respiratory disease which is caused by infectious laryngotracheitis virus (ILTV), and clinical signs vary from coughing, conjunctivitis, and gasping to expectoration of bloody mucus and death (1). Whereas genomic database analysis allowed the identification of an ILTV field strain in Australia as a causative agent of outbreaks as a result of recombination between attenuated vaccine viruses (2), genomic sequence data from viral outbreaks in South...
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