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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.
Effects of Commercial Processing Conditions of Extruded Soybean on Growth Performance and Amino Acids Digestibility of Broiler Chickens
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Introducción Quantitative genetic selection, using a weighted index of economically important traits, has been used by commercial breeders for over 60 years to improve the performance of egg-type stocks. That selection has been made primarily on BW, feed conversion (FC), egg number, egg size, various measurements of interior and exterior egg quality, and income over feed and chick cost. The genetic...
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Every once in a while you hear a story about a hen that changed into a cock. Such stories are often meet with skepticism, but sex reversals do, in fact, occur, although not very frequently. To date, however, spontaneous sex reversal from male to female has not been reported. In spontaneous sex reversal, only the phenotype 3 is altered. Genetically, the bird remains a female, but externally it appears male. Differences between the sexes ...
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Could experts help me in choosing a breed among lsl, buovan, bebcoc ,w98, or any other..as i want to establish an open house, floor stype shed of almost 7000 birds..plz aso give a prominent and competitive features of your suggestion..thanks ...
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ABSTRACT
Understanding gene expression, segregation and their inheritance from parent to offspring had been one of the major goals in developmental genetics because, determination of the superior parents and hybrid combinations before their use in breeding program is useful for a wide range of quantitative characteristics and suggested the contributions of different...
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Abstract At the moment, in Romania, there are three hybrids frequently used in poultry industry: Cobb 500, Ross 308 and Hubbard Flex. Basicly, these hybrids have similar productive characteristics and needs. Hybrid meat Cobb 500 has been designed so as to obtain higher performance with low costs. It is not choosey about nutritional requirements, so in terms of protein, start discussing about...
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Infertility: Male or Female Problem? It could be both. However, if an egg is laid, the "potential" fertility is always there. Males, may be or may become "impotent". Causes of Infertility: In females mostly due to over-feeding and obesity. In males mostly due to over-feeding and under-feeding. If a hen produces an egg, infertility may be due simply to absence of semen in...
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INTRODUCTION If we consider that the most research studies and debates are directed to big exploitations and producers in poultry industry (both eggs and meat production), who have the financial possibilities to employ specialists and who have a wide variety of poultry tools and equipments, then we may say that the middle and small producers are kind of deprived of accessing high technologies in this field. Lack of money, the...
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Dr. Mariana Ciacciarello, DVM and PHD in Poultry Nutrition at the University of KwaZulu-Natal, South Africa speaks about her research about broiler breeder, management and physiology at the XXII Latin American Poultry Congress, Buenos Aires, Argentina. ...
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Introduction
Lately, quail growing has awaken a great interest amongst producers, companies and researchers, due to the fact that it requires less labor and investment than other livestock activities, as well as because of the productive qualities of quails. During the last decade, the nutritional habits of the population have changed. Restaurants and " churrasquerias" (Brazilian typical...
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How can I have high fertility in young broiler breeder flocks (26-29wk)? ...
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"New developments in genomics have provided opportunities to enhance breeding programs in poultry by being able to genotype large numbers of individuals for tens of thousands of genetic markers across the genome at a reasonable cost," remarked Dr. Jack Dekkers of Iowa State University. He presented to breeder specialists and geneticists at the recent 2011 National Breeders Roundtable, sponsored by the Poultry Breeders of America and U.S. Poultry & Egg...
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I have noticed continuous prolapse in a flock of broiler breeders aged 12th wk now.It is happening since lat 8 weeks and so for more than 1% mortality has occured. We checked the dietary salt level and it is ok.We have ruled out chronic coccidiosis.The flock is on natural light only. Please help. ...
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Many broiler breeders have been reared since we first began to explore the idea that something other than just body weight (BW) and uniformity, both important longstanding management paradigms, was involved in proper rearing of broiler parent stock. Our original work was released in 1995 under the umbrella that we called the ‘concept of minimum cumulative nutrition’ that emphasized the form of the feeding program, long-term relative consistency of feeding, and coordination of age at...
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it is simple & useful article explaining the mode of enzymes action
but i want ask about the effect of pelleting on enzyme.
best regards ...
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