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| Registros recuperados: 108 | |
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| Wang,ZhePeng; Meng,GuoHua; Li,Na; Yu,MingFen; Liang,XiaoWei; Min,YuNa; Liu,FuZhu; Gao,YuPeng. |
| Abstract The very low-density lipoprotein receptor (VLDLR) transports egg yolk precursors into oocytes. However, our knowledge of the distribution patterns of VLDLR variants among breeds and their relationship to egg production is still incomplete. In this study, eight single nucleotide polymorphisms (SNPs) that account for 87% of all VLDLR variants were genotyped in Nick Chick (NC, n=91), Lohmann Brown (LohB, n=50) and Lueyang (LY, n=381) chickens, the latter being an Chinese indigenous breed. Egg production by NC and LY chickens was recorded from 17 to 50 weeks. Only four similar haplotypes were found in NC and LohB, of which two accounted for 100% of all NC haplotypes and 92.5% of LohB haplotypes. In contrast, there was considerable haplotypic diversity... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chicken; Egg production; Haplotype; Very low-density lipoprotein receptor (VLDLR). |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572016000300380 |
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| Chiang,Hsin-I; Berghman,Luc R.; Zhou,Huaijun. |
| The NF-kB pathway plays an important role in regulating the immunity response in animals. In this study, small interfering RNAs (siRNA) were used to specifically inhibit NF-kB 1 expression and to elucidate the role of NF-kB in the signal transduction pathway of the Salmonella challenge in the chicken HD11 cell line. The cells were transfected with either NF-kB 1 siRNA, glyceraldehyde 3-phosphate dehydrogenase siRNA (positive control) or the negative control siRNA for 24 h, followed by Salmonella enteritidis (SE) challenge or non-challenge for 1 h and 4 h. Eight candidate genes related to the signal pathway of SE challenge were selected to examine the effect of NF-kB 1 inhibition on their expressions by mRNA quantification. The results showed that, with a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: RNA interference; NF-kBp50; Macrophage; Salmonella; Chicken. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000300013 |
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| Cassoli,Clarissa Sanches da Silva; Jorge,Erika Cirstina; Patrício,Mateus; Alves,Helena Javiel; Almeida,Erik Amazonas de; Ledur,Mônica Corrêa; Coutinho,Luiz Lehmann. |
| Brazilian poultry industry has reached a high level of development in both meat and egg production as a result of constant technological modernization. Further improvements can be achieved through genomics, but before this can be accomplished, a better understanding of gene expression profiles and nucleotide polymorphisms is necessary. Since animal physiology is directly or indirectly controlled by the pituitary and hypothalamus, the aim of the present work was to identify and analyze genes expressed in these tissues in chicken lines with different growth potential. Two pituitary and hypothalamus cDNA libraries from 21 day broiler (TT) and layer (CC) chickens lines were constructed and allowed identification of 3,074 unique sequences and 77 single... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pituitary; Hypothalamus; EST; SNP; Chicken. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000600008 |
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| Zhao,Guiping; Zheng,Maiqing; Chen,Jilan; Wen,Jie; Wu,Chunmei; Li,Wenjuan; Liu,Libo; Zhang,Yuan. |
| Avian leukosis virus subgroup J (ALV-J) is a new type of virus that mainly induces myeloid leukosis (ML) in chickens. To further elucidate the pathogenesis of ALV-J infection and tumor development, expression profiles from the bone marrow tissue of 15 infected and 18 non-infected birds from a local-breed poultry-farm under naturally infected conditions, were analyzed by suppression-subtractive hybridization. The birds were diagnosed as ML+ (or ML-) by specific ALV-J detection methods, involving serological tests for antigens and antibodies, and RT-PCR to detect viral RNA. A total of 59 partial gene sequences were revealed by differential screening of 496 forward and 384 reverse subtracted cDNA clones. Of these, 22 identified genes, including 8 up-regulated... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Avian leukosis virus subgroup J; Chicken; Transferring gene; MHC genes; Hemoglobin gene. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000100009 |
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| Wang,ZhePeng; Liu,RuiFang; Wang,AnRu. |
| Blue egg coloring is attributed to biliverdin derived from the oxidative degradation of heme through catalysis by heme oxygenase (HO). The pigment is secreted into the eggshell by the shell gland. There is uncertainty as to whether the pigment is synthesized in the shell gland or in other tissues. To investigate the site of pigment biosynthesis, the expression of heme oxygenase (decycling) 1 (HMOX1), a gene encoding HO, and HO activity in liver and spleen were compared between blue-shelled chickens (n=12) and brown-shelled chickens (n=12). There were no significant differences in HMOX1 expression and HO activity in these tissues between the two groups. Since the liver and spleen, two important sites outside the shell gland where heme is degraded into... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biliverdin; Blue egg; Chicken; HMOX1. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000200020 |
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| Rafajlovic, Juanita; Cardwell, Ryan T.. |
| Current Doha Development Agenda (DDA) World Trade Organisation negotiations include proposals that would affect the trade barriers that protect Canada’s chicken producers from foreign competition. This research analyses the effects of the most recent proposals to emerge from the DDA negotiation on Canada’s chicken industry. We develop a partial-equilibrium model that generates welfare effects for the Canadian chicken industry supply chain. We also introduce stochastic prices to evaluate the effects of world price instability on the Canadian chicken industry. The model is also adapted to represent chicken as two distinct products; white meat and dark meat. Simulation results suggest that the welfare effects of the DDA proposals on the Canadian chicken... |
| Tipo: Report |
Palavras-chave: WTO; Chicken; Canada; Model; Trade; Agricultural and Food Policy; Demand and Price Analysis; International Relations/Trade. |
| Ano: 2010 |
URL: http://purl.umn.edu/95814 |
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| Martinez, Stephen W.. |
| Recent changes in structure of the U.S. pork industry reflect, in many ways, past changes in the broiler industry. Production contracts and vertical integration in the broiler industry facilitated rapid adoption of new technology, improved quality control, assured market outlets for broilers, and provided a steady flow of broilers for processing. Affordable, high-quality chicken products have contributed to continual increases in U.S. chicken consumption, which has surpassed pork and beef on a per capita basis. Incentives for contracting and vertical integration in the pork industry may yield comparable results. If so, these arrangements might be expected to result in larger supplies of higher quality pork products at economical prices. |
| Tipo: Report |
Palavras-chave: Vertical coordination; Vertical integration; Contracts; Transaction costs; Technology; Chicken; Pork; Livestock Production/Industries. |
| Ano: 1999 |
URL: http://purl.umn.edu/34031 |
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| Reed, Debra; Gillespie, Jeffrey M.; Downer, Robert; Schupp, Alvin R.. |
| The U.S. Department of Agriculture, the Food and Drug Administration, and the medical profession, among others, have attempted to broaden consumers' knowledge of the nutritive content of foods. Retailers provide information by supplying point-of-purchase nutrition information and/or nutrition labels on fresh meats. The availability of nutrition information on packaged fresh meats is relatively new. A survey of Louisiana households provided estimates of their knowledge of the fat, cholesterol, and protein content of selected combinations of fresh beef, pork, chicken, and turkey meats. Permutation analysis and tabular analyses were used to assess households' nutrition knowledge of the selected fresh meats. |
| Tipo: Journal Article |
Palavras-chave: Beef; Chicken; Consumer knowledge; Nutrient content; Permutation analysis; Pork; Turkey; Food Consumption/Nutrition/Food Safety. |
| Ano: 1999 |
URL: http://purl.umn.edu/14731 |
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| Mattson, Jeremy W.; Jin, Hyun Joung; Koo, Won W.. |
| Since the discovery of Bovine Spongiform Encephalopathy (BSE) in the United States in December 2003, U.S. beef exports have declined approximately 85 percent. A number of countries, including Japan and Korea (the top export markets for U.S. beef), have banned imports of beef from the United States, while U.S. exports to other important markets, such as Mexico and Canada, have been well below previous levels. Domestic demand in the United States was not significantly affected by the BSE discovery, but the effect of decreased beef exports on U.S. price is significant. This study examines the effect of exports and other supply and demand factors on U.S. meat prices, and estimates the effect of the drop in exports on U.S. beef and cattle prices. Results... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Bovine Spongiform Encephalopathy; Beef; Pork; Chicken; Exports; International Relations/Trade. |
| Ano: 2005 |
URL: http://purl.umn.edu/23571 |
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| Registros recuperados: 108 | |
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