title: Establishment of six homozygous MHC-B haplotype populations associated with susceptibility to Marek's disease in Chinese specific pathogen-free BWEL chickens.
abstract: The highly polymorphic chicken major histocompatibility complex (MHC) is associated with different levels of immunologic responses to certain avian pathogens. MHC-B haplotype chickens are an important genetic resource for studying the genetic determination of pathogen resistance and susceptibility. The BWEL chicken population is the only specific pathogen-free (SPF) chickens bred and developed by the State Center of Poultry Genetic Resources of Laboratory Animals in China. In this study, we successfully established six homozygous MHC-B haplotype populations from the BWEL chickens using microsatellite marker technology, named as BW/G(1, 2, 3, 5, 6, 7) lines, and their molecular genotypes were matched to six serologically defined MHC-B haplotypes, B13, B15, B2, B5, B21 and B19, respectively. The sequences of BF genes exons 2 and 3 from four successive generations (F1-F4) of the BW/G(n) lines were completely consistent with those of serologically defined MHC-B haplotypes. Subsequently, six BW/G(n) line specific allo-antisera were prepared by immunization with red blood cells (RBCs) and hemagglutination tests results showed the BW/G(n) SPF chickens could be serologically differentiated. Additionally, susceptibility to Marek's disease (MD) in the BW/G3 (B2 haplotype) and BW/G7 (B19 haplotype) lines were determined by comparing mortality, macroscopic and histopathological lesions, and viral loads in feather pulp. The BW/G7 line showed greater genetic susceptibility to the very virulent MD virus (MDV) strain than the BW/G3 line. The establishment of MHC-B haplotype chicken populations associated with susceptibility to MD will be helpful for studying host immune responses and further developing the more effective vaccines in the context of MHC specificities, and they are also very useful for an understanding of MHC genes architecture and function.
authors.affiliation: State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences (CAAS), Harbin 150001, China.
authors.forename: Caixia
authors.initials: C
authors.lastname: Gao
authors.affiliation: State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences (CAAS), Harbin 150001, China. Electronic address: hlx1993@126.com.
authors.forename: Lingxia
authors.initials: L
authors.lastname: Han
authors.affiliation: CAAS-ILRI Joint Laboratory on Livestock and Forage Genetic Resources, Institute of Animal Science, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100193, China.
authors.forename: Jianlin
authors.initials: J
authors.lastname: Han
authors.affiliation: State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences (CAAS), Harbin 150001, China.
authors.forename: Jiasen
authors.initials: J
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences (CAAS), Harbin 150001, China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Jiang
authors.affiliation: State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences (CAAS), Harbin 150001, China.
authors.forename: Dongchun
authors.initials: D
authors.lastname: Guo
authors.affiliation: State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences (CAAS), Harbin 150001, China. Electronic address: qld@hvri.ac.cn.
authors.forename: Liandong
authors.initials: L
authors.lastname: Qu
mesh_terms: D000818:Animals; D002645:Chickens / Q000235:genetics*; D002681:China; D020022:Genetic Predisposition to Disease; D006239:Haplotypes; D008285:Major Histocompatibility Complex; D025922:Mardivirus / Q000302:isolation & purification*; D008380:Marek Disease / Q000235:genetics* / Q000473:pathology / Q000821:virology; D011110:Polymorphism, Genetic; D011201:Poultry Diseases / Q000235:genetics / Q000473:pathology / Q000821:virology*; D017422:Sequence Analysis, DNA
keywords: Chicken; Hemagglutination test; MHC-B haplotype; Marek’s disease; Microsatellite marker; Susceptibility