scholarly journals Effect of pre-hatch incubator lights on the ontogeny of CNS opsins and photoreceptors in the Pekin duck

2022 ◽  
pp. 101699
Author(s):  
Anna Vostrizansky ◽  
Andrew Barce ◽  
Zoe Gum ◽  
D. Shafer ◽  
D. Jeffrey ◽  
...  
Keyword(s):  
Pekin Duck

scholarly journals The First Report of the Prion Protein Gene (PRNP) Sequence in Pekin Ducks (Anas platyrhynchos domestica): The Potential Prion Disease Susceptibility in Ducks

Genes ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 193
Author(s):  
Min-Ju Jeong ◽  
Yong-Chan Kim ◽  
Byung-Hoon Jeong
Keyword(s):  
Prion Protein ◽  
Dna Sequence ◽  
Prion Disease ◽  
Protein Gene ◽  
Prnp Gene ◽  
Pekin Duck ◽  
Prion Protein Gene ◽  
First Report ◽  
Aggregation Propensity ◽  
Pekin Ducks

Pathogenic prion protein (PrPSc), converted from normal prion protein (PrPC), causes prion disease. Although prion disease has been reported in several mammalian species, chickens are known to show strong resistance to prion diseases. In addition to chickens, the domestic duck occupies a large proportion in the poultry industry and may be regarded as a potential resistant host against prion disease. However, the DNA sequence of the prion protein gene (PRNP) has not been reported in domestic ducks. Here, we performed amplicon sequencing targeting the duck PRNP gene with the genomic DNA of Pekin ducks. In addition, we aligned the PrP sequence of the Pekin duck with that of various species using ClustalW2 and carried out phylogenetic analysis using Molecular Evolutionary Genetics Analysis X (MEGA X). We also constructed the structural modeling of the tertiary and secondary structures in avian PrP using SWISS-MODEL. Last, we investigated the aggregation propensity on Pekin duck PrP using AMYCO. We first reported the DNA sequence of the PRNP gene in Pekin ducks and found that the PrP sequence of Pekin ducks is more similar to that of geese than to that of chickens and mallards (wild ducks). Interestingly, Pekin duck PrP showed a high proportion of β-sheets compared to that of chicken PrP, and a high aggregation propensity compared to that of avian PrPs. However, Pekin duck PrP with substitutions of chicken-specific amino acids showed reduced aggregation propensities. To the best of our knowledge, this is the first report on the genetic characteristics of the PRNP sequence in Pekin ducks.

scholarly journals Structural basis of antigen recognition: crystal structure of duck egg lysozyme

2017 ◽  
Vol 73 (11) ◽  
pp. 910-920 ◽  
Author(s):  
David Brent Langley ◽  
Ben Crossett ◽  
Peter Schofield ◽  
Jenny Jackson ◽  
Mahdi Zeraati ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Mass Spectrometry ◽  
Binding Affinity ◽  
Anas Platyrhynchos ◽  
Antigen Recognition ◽  
Pekin Duck ◽  
Structural Basis ◽  
Primary Sequence ◽  
Duck Egg ◽  
Differential Affinity

Duck egg lysozyme (DEL) is a widely used model antigen owing to its capacity to bind with differential affinity to anti-chicken egg lysozyme antibodies. However, no structures of DEL have so far been reported, and the situation had been complicated by the presence of multiple isoforms and conflicting reports of primary sequence. Here, the structures of two DEL isoforms from the eggs of the commonly used Pekin duck (Anas platyrhynchos) are reported. Using structural analyses in combination with mass spectrometry, non-ambiguous DEL primary sequences are reported. Furthermore, the structures and sequences determined here enable rationalization of the binding affinity of DEL for well documented landmark anti-lysozyme antibodies.

Single nucleotide polymorphism scanning and expression analysis of ACSL1 from different duck breeds

2021 ◽  
Author(s):  
Qianqian Song ◽  
Zhixiu Wang ◽  
Hongliang Zhang ◽  
Xiangxiang Li ◽  
Yang Zhang ◽  
...  
Keyword(s):  
Amino Acid ◽  
Amino Acid Sequence ◽  
Protein Expression ◽  
Meat Quality ◽  
Liver Tissue ◽  
Phylogenetic Analyses ◽  
Abdominal Fat ◽  
Breast Muscle ◽  
Pekin Duck ◽  
Lipid Deposition

Accumulating studies have indicated that the long-chain fatty acyl-CoA1 (ACSL1) gene is related to fat deposition and meat quality in mammals. However, few studies have investigated the relationship between ACSL1 and lipid deposition in ducks. To examine this, we assessed the physicochemical property, homologous alignment and phylogenetic analyses of the ACSL1 amino acid sequence using bioinformatics tools. The analysis indicated that the ACSL1 amino acid sequence varies in animals, and the duck ACSL1 protein is most closely related to that of chicken. Two SNP sites were identified at 1749 and 1905 bp of the coding region of ACSL1 by sequencing. Quantitative real-time PCR and western blotting were used to measure mRNA and protein levels in abdominal fat, breast muscle and liver tissue of Pekin duck (BD) and Cherry Valley duck (CD). mRNA and protein expression were significantly higher in BD than in CD in abdominal fat and liver tissue (P < 0.05). In breast muscle, the mRNA level of ACSL1 was also significantly higher in BD than in CD (P < 0.05), and protein expression in BD tended to be higher than that of CD. These results suggest that ACSL1 may contribute to lipid deposition and meat quality in ducks.

scholarly journals The Influence of Body Mass on the Endurance to Restrained Submergence in the Pekin Duck

1986 ◽  
Vol 120 (1) ◽  
pp. 351-367 ◽  
Author(s):  
DENNIS M. HUDSON ◽  
DAVID R. JONES
Keyword(s):  
Body Mass ◽  
Linear Regression Analysis ◽  
Dive Duration ◽  
Oxygen Storage ◽  
Pekin Duck ◽  
Oxygen Utilization ◽  
Pekin Ducks ◽  
Mass Coefficient ◽  
Relationship Of ◽  
The Relationship

Pekin ducks, ranging in mass from 0.05 to 3.5 kg, were force-dived to determine the maximum tolerance to diving asphyxia. The size of the respiratory and blood oxygen storage compartments and oxygen utilization during the dive were also measured. By the end of a maximum dive, less than 4% of the original O2 store remained in the blood, whereas almost 25% remained in the respiratory system. In contrast, the level of arterial glucose did not change significantly during diving. The relationship of a number of measured variables to body mass was analysed using linear regression analysis on logio-transformed variables to generate power equations of the form Y = aXb (Y, any variable; X, body mass; a, mass coefficient; b, mass exponent). The mass exponent was 1.19 for the total oxygen stores and 0.64 for maximum diving duration. Using measurements of brain and heart mass and literature estimates of the scaling of O2 consumption, it was also possible to predict a mass exponent aerobic metabolism by these organs during a maximum dive. Allometric cancellation of mass exponents for O2 availability and predicted utilization resulted in a residual mass exponent almost identical to the measured value for maximum dive duration. Thus it is possible to predict the relationship of maximum underwater endurance to body mass in Pekin ducks from a knowledge of the oxygen consumption by, and availability to, the central aerobic organs.

scholarly journals Surgical Correction of Perosis/Slipped Tendon in a White Pekin Duck- Case Report

2018 ◽  
Vol 7 (12) ◽  
pp. 389-392
Author(s):  
Priya nka ◽  
Satbir Sharma ◽  
R.N. Chaudhary ◽  
Ram Niwas ◽  
Neeraj Arora ◽  
...  
Keyword(s):  
Case Report ◽  
Surgical Correction ◽  
Pekin Duck

scholarly journals Comparative transcriptome and histomorphology analysis of testis tissues from mulard and Pekin ducks

2020 ◽  
Vol 63 (2) ◽  
pp. 303-313
Author(s):  
Li Li ◽  
Linli Zhang ◽  
Zhenghong Zhang ◽  
Nemat O. Keyhani ◽  
Qingwu Xin ◽  
...  
Keyword(s):  
Gene Expression ◽  
Differential Expression ◽  
Candidate Genes ◽  
Transcriptome Sequencing ◽  
Differentially Expressed ◽  
Pekin Duck ◽  
Comparative Transcriptome ◽  
Qrt Pcr ◽  
Pekin Ducks ◽  
Testis Tissue

Abstract. Testicular transcriptomes were analyzed to characterize the differentially expressed genes between mulard and Pekin ducks, which will help establish gene expression datasets to assist in further determination of the mechanisms of genetic sterility in mulard ducks. Paraffin sections were made to compare the developmental differences in testis tissue between mulard and Pekin ducks. Comparative transcriptome sequencing of testis tissues was performed, and the expression of candidate genes was verified by quantitative reverse transcription-polymerase chain reaction (qRT-PCR). In mulard ducks, spermatogonia and spermatocytes were arranged in a disordered manner, and no mature sperm were observed in the testis tissue. However, different stages of development of sperm were observed in seminiferous tubules in the testis tissue of Pekin ducks. A total of 43.84 Gb of clean reads were assembled into 193 535 UniGenes. Of these, 2131 transcripts exhibited differential expression (false discover rate <0.001 and fold change ≥2), including 997 upregulated and 1134 downregulated transcripts in mulard ducks as compared to those in Pekin duck testis tissues. Several upregulated genes were related to reproductive functions, including ryanodine receptor 2 (RYR2), calmodulin (CALM), argininosuccinate synthase and delta-1-pyrroline-5-carboxylate synthetase ALDH18A1 (P5CS). Downregulated transcripts included the testis-specific serine/threonine-protein kinase 3, aquaporin-7 (AQP7) and glycerol kinase GlpK (GK). The 10 related transcripts involved in the developmental biological process were identified by GO (Gene Ontology) annotation. The KEGG (Kyoto Encyclopedia of Genes and Genomes) pathways indicated that peroxisome proliferator-activated receptors (PPARs) and calcium signaling pathways were significantly (P<0.001) associated with normal testis physiology. The differential expression of select genes implicated in reproductive processes was verified by qRT-PCR, which was consistent with the expression trend of transcriptome sequencing (RNA-seq). Differentially expressed candidate genes RYR2, CALM, P5CS, AQP7 and GK were identified by transcriptional analysis in mulard and Pekin duck testes. These were important for the normal development of the male duck reproductive system. These data provide a framework for the further exploration of the molecular and genetic mechanisms of sterility in mulard ducks. Highlights. The mulard duck is an intergeneric sterile hybrid offspring resulting from mating between Muscovy and Pekin ducks. The transcriptomes of testis tissue from mulard and Pekin ducks were systematically characterized, and differentially expressed genes were screened, in order to gain insights into potential gonad gene expression mechanisms contributing to genetic sterility in mulard ducks.

scholarly journals EFFECT OF SEASON AND SEX ON SOME PRODUCTIVE TRAITS OF PEKIN DUCK REARD INTESIVELY UNDER IRAQI CONDITIONS

2020 ◽  
Vol 51 (Special) ◽  
Author(s):  
AL-Ghabban & AL-Hassani
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Conversion Ratio ◽  
Pekin Duck ◽  
Productive Performance ◽  
Feed Conversion ◽  
Agricultural Engineering ◽  
Engineering Sciences ◽  
Productive Traits ◽  
Intensive System

This study was conducted at Poultry farm/Department of Animal Production/College of Agricultural Engineering Sciences/University of Baghdad, were divided into two experiments one during summer and second during winter seasons to study the effect of season and sex on productive performance of Pekin duck reared in an intensive system under harsh Iraqi conditions. A hundred fifty, one day old ducklings were used in each experiment. On 14 day of age, birds were sexed then randomly divided into nine replicates (pens) (5 replicates for females and 4 for males). Results indicated that season has significant effects on studied traits. Body weight, weight gain and food consumption were significantly ( p < 0.01 )higher in birds reared in winter than those reared in summer, whereas no significant differences existed in feed conversion ratio and mortality. Males revealed highly significant ( p< 0.01 ) in body weight and weight gain compared with females in both seasons. Study revealed that pekin duck performance were slightly effected and  resisted to acute high temperature during summer. Pursuant to, it can be reared pekin duck in intensive system throughout year in Iraq.

scholarly journals Thyroxine Secretion Rate and Growth In the White Pekin Duck

1950 ◽  
Vol 29 (1) ◽  
pp. 109-114 ◽  
Author(s):  
Edmund Hoffmann
Keyword(s):  
Secretion Rate ◽  
Pekin Duck
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