Guangdong Wens Foodstuffs Group Co.

Yunfu, China

Guangdong Wens Foodstuffs Group Co.

Yunfu, China
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Liu S.B.,Chinese Academy of Agricultural Sciences | Liu S.B.,Guangdong Wens Foodstuffs Group Corporation Ltd. | Liao X.D.,Chinese Academy of Agricultural Sciences | Lu L.,Chinese Academy of Agricultural Sciences | And 6 more authors.
Poultry Science | Year: 2017

An experiment was conducted to investigate the effect of dietary non-phytate phosphorus (NPP) level on growth performance, bone characteristics and phosphorus metabolism-related gene expressions, so as to evaluate the dietary NPP requirement of broiler chicks fed a conventional corn-soybean meal diet from 1 to 21 d of age. A total of 540 day-old Arbor Acres male chicks were randomly allocated to one of nine treatments with six replicate cages of 10 birds per cage in a completely randomized design, and fed a basal corn-soybean meal diet (containing 0.08% of NPP) supplemented with 0.10, 0.15, 0.25, 0.30, 0.35, 0.40, 0.45, or 0.50% of inorganic phosphorus in the form of CaHPO4·2H2O, respectively. Each diet contained the constant calcium content of about 1.0%. The results showed that daily weight gain, serum inorganic P, tibia bone strength, tibia ash percentage, tibia bone mineral content (BMC) and density (BMD), middle toe ash percentage, middle toe BMC and BMD were affected (P < 0.0001) by dietary NPP level, and increased linearly (P < 0.0001) and quadraticly (P < 0.004) as dietary NPP levels increased. The gene expression of type IIb sodium-phosphate cotransporter (NaPi-IIb) in the duodenum was affected (P < 0.03) and decreased linearly (P < 0.002) as dietary NPP levels increased. Dietary NPP requirements estimated based on fitted broken-line models (P < 0.0001) of the sensitive indices including daily weight gain, tibia bone strength, tibia ash percentage, tibia BMC and BMD as well as middle toe ash percentage were 0.34∼0.39%. The results from this study indicate that tibia BMC and BMD might be new, sensitive, and noninvasive criteria to evaluate the dietary NPP requirements of broilers, and the dietary NPP requirement is 0.39% for broiler chicks fed a conventional corn-soybean meal diet from 1 to 21 d of age. © 2016 Poultry Science Association Inc.

Qin P.,Zhejiang University | Li H.,Zhejiang University | Wang J.-W.,Zhejiang University | Wang B.,Zhejiang University | And 7 more authors.
Veterinary Microbiology | Year: 2017

Mammalian orthoreoviruses (MRVs), which cause gastrointestinal and respiratory illness, have been isolated from a wide variety of mammalian species including bats, minks, pigs and humans. Here we report the isolation and genetic and pathogenic characterization of a novel MRV type 3 (MRV3), named MRV-ZJ2013, from the diarrheic feces of piglets in Zhejiang province, China. Genomic and phylogenetic analysis shows that MRV-ZJ2013 may have originated from reassortments among mink, bat, and pig MRVs, suggesting the hypothesis that interspecies transmission has occurred in pig herds. Neonatal piglets infected with MRV-ZJ2013 displayed mild clinical signs such as poor appetite and soft feces, but vomiting and diarrhea were not observed. Fecal virus shedding was detected only in three out of six piglets, each for one- or two-day post-infection. In contrast, piglets inoculated with a virulent porcine epidemic diarrhea virus (PEDV) strain as the control group had severe signs characterized by acute vomiting and watery diarrhea. These findings suggest that the virulence of MRV-ZJ2013, if any, was likely not significant compared to that of PEDV. A seroepidemiological survey of MRV by means of an indirect enzyme-linked immune-sorbent assay (ELISA) based on a recombinant MRV3 capsid protein sigma1 as antigen revealed a high seroprevalence (77%) in 1037 samples from diarrheic pigs of different ages from 24 herds in seven provinces of east China between 2015 and 2016, indicating that MRV3 is endemic in pig herds in China, and may contribute collectively to enteric disease along with other porcine pathogens. © 2017 Elsevier B.V.

PubMed | South China Agricultural University, Jiangxi Agricultural University and Guangdong Wens Foodstuffs Group Co.
Type: | Journal: Scientific reports | Year: 2016

Vertnin (VRTN) variants have been associated with the number of thoracic vertebrae in European pigs, but the association has not been evidenced in Chinese indigenous pigs. In this study, we first performed a genome-wide association study in Chinese Erhualian pigs using one VRTN candidate causative mutation and the Illumina Porcine 60K SNP Beadchips. The VRTN mutation is significantly associated with thoracic vertebral number in this population. We further show that the VRTN mutation has pleiotropic and desirable effects on teat number and carcass (body) length across four diverse populations, including Erhualian, White DurocErhualian F2 population, Duroc and Landrace pigs. No association was observed between VRTN genotype and growth and fatness traits in these populations. Therefore, testing for the VRTN mutation in pig breeding schemes would not only increase the number of vertebrae and nipples, but also enlarge body size without undesirable effects on growth and fatness traits, consequently improving pork production. Further, by using whole-genome sequence data, we show that the VRTN mutation was possibly introgressed from Chinese pigs into European pigs. Our results provide another example showing that introgressed Chinese genes greatly contributed to the development and production of modern European pig breeds.

Liu S.,Guangdong Wens Foodstuffs Group Corporation Ltd. | Liu S.,Huazhong Agricultural University | Tan H.,Guangdong Wens Foodstuffs Group Corporation Ltd. | Yang L.,University of Leeds | Yi J.,Guangdong Wens Foodstuffs Group Corporation Ltd.
Turkish Journal of Veterinary and Animal Sciences | Year: 2014

Phenotypic and genetic parameters among udder traits (udder depth, UD; median suspensory line, MS; fore udder attachment, FUA; rear udder height, RUH; rear udder width, RUW), final score (FS), and milk production traits (305-day milk yield, 305 DM; 305-day milk-fat yield, 305 DF; 305-day milk-protein yield, 305 DP) were estimated using a derivative-free restricted maximum likelihood procedure with an animal model. The results showed that heritability estimates for selected traits ranged from 0.11 to 0.24. Strong positive genetic correlations were observed for MS, RUH, and RUW with FS (0.42-0.72). A positive genetic relationship was also estimated between MS and 305 DM (0.79). The genetic correlation between UD and 305 DM was -0.20. Positive genetic correlations were found between RUW and milk production traits (0.44-0.89). RUH also had positive genetic relationships with 305 DM (0.27) and 305 DF (0.16). Moderate positive genetic correlations were estimated between FS and milk production traits (0.25-0.35). The genetic parameters calculated from field records will provide valuable information for genetic improvement in type and milk production traits of Holstein cattle in southern China. © TÜBİTAK.

Ji J.,South China Agricultural University | Xie J.,South China Agricultural University | Chen F.,South China Agricultural University | Chen F.,Guangdong Wens Foodstuffs Group Co. | And 8 more authors.
Virology Journal | Year: 2011

Background: The nephropathogenic avian infectious bronchitis (IB) caused unprecedented economic losses to the commercial chicken industry of China in 2008-2009. To investigate the prevalence of nephropathogenic IB in China, eighty IBV isolates from different provinces during 2008-2009 were identified by dwarf embryo test and RT-PCR. Results: The strains were mostly isolated in winter and spring with a wide age range of IB outbreaks, from 4 to 69 days. By the virus recovery trials, 70/80 of the strains resulted in the deaths or distresses of birds from nephritis. To learn more about the molecular evolutionary characteristics of the circulating field strains, the coding region of major spike 1 (S1) protein gene of these strains was RT-PCR amplified and sequenced. Compared to the published representative strains, nucleotides and amino acids sequence analysis indicated that the S1 genes of these strains and the reference strains displayed homologies ranging from 75.1% to 99.8% and from 73.1% to 99.8% respectively. S1 protein of the major pandemic strains contained 540 or 542 amino acids with the cleavage site of HRRRR or RRFRR. Phylogenetic analysis revealed that recent field isolates of IBV in China were mostly belonged to A2-branch (QXIBV-branch) and HN08-branch, only one isolate was belonged to Gray-branch and M41-branch respectively. Most of the 80 strains showed evolutionarily distant from vaccine strains. Conclusions: The results of this study suggested that nephropathogenic IBVs were mainly A2-like strains in China during 2008-2009. © 2011 Ji et al; licensee BioMed Central Ltd.

Wu Z.Q.,South China Agricultural University | Wu Z.Q.,Guangdong Wens Foodstuffs Group Co. | Ji J.,South China Agricultural University | Zuo K.J.,South China Agricultural University | And 8 more authors.
Poultry Science | Year: 2010

Forty-seven strains of H9 subtype avian influenza viruses identified by specific reverse transcription- PCR method were isolated from the chicken and duck flocks in different areas of China during the 2002 to 2009 epizootic period. Hemagglutinin (HA) genes of these strains were sequenced and analyzed with the representative strains published in GenBank. The results indicated that the HA genes of these strains and the vaccine strains displayed nucleotide homologies ranging from 91.7 to 96.6% and amino acid homologies ranging from 92.3 to 95.7%, respectively. Analysis of the mature peptide sequences of these HA genes showed that the presence of leucine at position 216 (corresponding to residue 226 in H3 numbering) indicated a preference to the binding of α (2-6) sialic acid receptors, which was the same as human isolates. Extra potential glycosylation sites appeared in the HA genes of most tested isolations compared with the vaccine strains. The HA cleavage sites of most of the strains were the 335PSRSSR↓GLF341, but all of the strains met the characteristics of low-pathogenic avian influenza. The results of phylogenetic analysis indicated that all 47 strains and the current vaccine strains belong to the same phylogenetic lineage h9.4.2, but they had some genetic deviation in the last decade. Compared with the vaccine strains, 7 mutations were found in the antigen epitope region of the HA genes of the field strains. These results suggested that the commercial vaccine might not induce satisfactory prevention against infection of H9N2 avian influenza virus. © 2010 Poultry Science Association Inc.

Chen F.,South China Agricultural University | Yan Z.-Q.,South China Agricultural University | Liu J.,Guangdong Wens Foodstuffs Group Co. | Ji J.,South China Agricultural University | And 6 more authors.
Virus Genes | Year: 2012

Avian influenza virus (H9N2) infection is a major problem of product performance in poultry worldwide. Vaccination is used to limit spread, but more knowledge is needed on the epidemiology of virus subtypes to improve vaccine design. In this study, 40 H9N2 subtype avian influenza viruses (AIVs) were isolated from vaccinated poultry flocks in China from 2010 to 2011. Hemagglutinin (HA) from different virus strains was sequenced and analyzed. We found that the HA genes of these strains shared nucleotide and deduced amino acid homologies that ranged from 90.1 to 92.9 and 91.4 to 95.0 %, respectively, when compared with vaccine strains. Phylogenetic analysis showed that the strains tested could be divided into two major groups. Group I consisted of 24 strains isolated mainly from Eastern and Central China. Group II consisted of 20 strains isolated from Southern China. The cleavage site within the HA protein contained two basic motifs, PSRSSR;GLF for group I, and PARSSR;GLF for group II. Additional potential glycosylation sites were found at amino acid position 295 in the HA1 of the isolates in group I, compared with isolates in group II and the vaccine strains. Furthermore, 38 out of the 40 isolates had a leucine residue at position 216 (aa 226 in H3), which was characteristic of human influenza virus-like receptor specificity. In the present study we found that geographical factors play a significant role in virus evolution, and emphasize the importance of continuing surveillance of H9N2 AIVs in chickens in China. © Springer Science+Business Media, LLC 2012.

Li W.,Huazhong Agricultural University | Li H.,Huazhong Agricultural University | Pan Y.,Guangdong Wens Foodstuffs Group Company | Deng F.,Huazhong Agricultural University | And 3 more authors.
Emerging Infectious Diseases | Year: 2012

In 2011, porcine epidemic diarrhea virus (PEDV) infection rates rose substantially in vaccinated swine herds. To determine the distribution profi le of PEDV outbreak strains, we sequenced the full-length spike gene from samples from 9 farms where animals exhibited severe diarrhea and mortality rates were high. Three new PEDV variants were identifi ed.

Huang P.,South China Agricultural University | Lin P.,South China Agricultural University | Yan S.,South China Agricultural University | Yan S.,Guangdong Wens Foodstuffs Group Co. | Xiao M.,South China Agricultural University
International Review on Computers and Software | Year: 2012

For the modern poultry breeding companies, it is worthwhile to predict the poultry growth performance based on the massive historical data gradually cumulated in production. However, because of the complexity and uncertainty brought by the influence of environmental and physiological factors, extracting valuable knowledge from poultry raising dataset is a challenge. As a way to uncover the seasonal growth rule hidden among the broiler data, which is regulated by both the natural law of seasons and the biological law of poultry upgrowth, we suggest developing decision support system (DSS) using statistical methods and data mining technology based on the collected meteorological factors. This paper focuses on the building process of a model-driven DSS for seasonal broiler growth performance prediction. Systematic approach is deployed including data preprocessing, candidate predictor variables selection, and modeling. Prediction models including multiple linear regression and neural network are adopted for both linear and nonlinear fitting. Finally, case study of the broiler growth dataset of the most famous poultry raising company in China is used to evaluate the developed DSS and the results show the effectiveness of our approach. © 2012 Praise Worthy Prize S.r.l. -All rights reserved.- All rights reserved.

PubMed | Chinese Academy of Agricultural Sciences, North Carolina State University and Guangdong Wens Foodstuffs Group Corporation Ltd.
Type: Journal Article | Journal: Biometals : an international journal on the role of metal ions in biology, biochemistry, and medicine | Year: 2016

Three experiments were conducted to investigate the effects of inorganic and organic Mn sources on MnSOD mRNA, protein and enzymatic activity and the possible signal pathways. The primary broiler myocardial cells were treated with MnCl2 (I) or one of organic chelates of Mn and amino acids with weak, moderate (M) or strong (S) chelation strength for 12 and 48 h. Cells were preincubated with superoxide radical anions scavenger N-acetylcysteine (NAC) or specific inhibitors for MAPKs and protein tyrosine kinase (PTK) or protein kinase C (PKC) for 30 min before treatments of I and M. The MnSOD mRNA, protein and enzymatic activity, phosphorylated MAPKs or protein kinases activations were examined. The results showed that additions of Mn increased (P < 0.05) MnSOD mRNA levels and M was more effective than I. Additions of Mn elevated (P < 0.05) MnSOD protein levels and enzymatic activities, and no differences were found among I and M. Addition of NAC did not decrease (P > 0.05) Mn-induced MnSOD mRNA and protein levels. None of the three MAPKs was phosphorylated (P > 0.05) by Mn. Additions of Mn decreased (P < 0.05) the PTK activities and increased (P < 0.05) the membrane PKC contents. Inhibitors for PTK or PKC decreased (P < 0.05) Mn-induced MnSOD protein levels. The results suggested that Mn-induced MnSOD mRNA and protein expressions be not related with NAC, and MAPK pathways might not involve in Mn-induced MnSOD mRNA expression. PKC and PTK mediated the Mn-induced MnSOD protein expression.

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