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| http://dx.doi.org/10.14309/crj.0000000000000917 | DOI Listing |
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Mapping quantitative trait loci regions associated with Marek's disease on chicken autosomes by means of selective DNA pooling.
Sci Rep
December 2024
Hy-Line International, 2583 240th St, PO Box 310, Dallas Center, 50063, IA, USA.
Marek's Disease (MD), which can result in neurological damage and tumour formation, has large effects on the economy and animal welfare of the poultry industry worldwide. Previously, we mapped autosomal MD QTL regions (QTLRs) by individual genotyping of an F population from a full-sib advanced intercross line. We further mapped MD QTLRs on the chicken Z chromosome (GGZ) using the same F population, and by selective DNA pooling (SDP) of 8 elite egg production lines.
View Article and Find Full Text PDFTranscriptomic insight into the underlying mechanism of induced molting on reproductive remodeling, performance and egg quality in laying hen.
Poult Sci
December 2024
State Key Laboratory of Animal Biotech Breeding, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China. Electronic address:
This study aimed to clarify the reproductive remodeling mechanism in enhancing production performance and egg quality during the fasting-induced molting process of laying hens. A total of two-hundred and forty 380-days-old Jingfen No. 6 laying hens, with an average laying rate of 78% were divided into four replicates, with 60 hens in each replicate to receive a four-stage molt induction experiment.
View Article and Find Full Text PDFEmerging and characterization of a novel fowl adenovirus 4 strain with open reading frame 19 (ORF19) in diseased chickens from China.
Poult Sci
December 2024
Institute of Pathogen Biology and Immunology, College of Biology, Hunan Provincial Key Laboratory of Medical Virology, Hunan University, Changsha 410082, China. Electronic address:
The highly virulent genotype fowl adenovirus 4 (FAdV-4), associated with severe hydropericardium hepatitis syndrome (HHS) in poultry from China, is characterized by a large deletion of 1966 bp (1966-del), including losses of ORF19 and ORF27. However, how this virus originated remains unclear. In this study, a novel FAdV-4 strain, HNU-XXY-2019, from diseased chickens, which has a genome size of 45669 bp and is approximately 1966 bp longer than the known FAdV-4 genome from China, was isolated and characterized.
View Article and Find Full Text PDFEffects of computer-generated patterns with different temporal and spatial frequencies on choroidal thickness, retinal dopamine and candidate genes in chickens wearing lenses.
Front Med (Lausanne)
December 2024
Section of Neurobiology of the Eye, Ophthalmic Research Institute, University of Tübingen, Tübingen, Germany.
Purpose: Changes in choroidal thickness (ChT) are proposed to predict myopia development but evidence is mixed. We investigated time courses of choroidal responses, following different types of dynamic artificial stimulation in chicks with and without spectacle lenses, as well as changes in retinal dopamine metabolism and expression of candidate genes.
Methods: Chicks were kept in an arena surrounded by computer monitors presenting dynamic checkerboard fields of small, medium and large size.
Epidemiological investigation and drug resistance analysis of Avian pathogenic (APEC) of Wenchang chickens in Hainan, China.
Avian Pathol
December 2024
The Sanya Institute of Nanjing Agricultural University, Yabulun Industrial Park, Yazhou Bay Science and Technology City, Sanya, 572024, China.
Avian pathogenic (APEC) is one of the major causes of poultry morbidity worldwide, severely reducing egg production and embryo hatchability in laying hens. Hainan Wenchang chicken is an important poultry breed in Hainan, China, and its culture has been affected by APEC for a long time. In this study, in order to investigate the causes of low hatchability and a large number of weak chicks during the breeding of Wenchang chicken, a total of 130 strains of APEC were isolated from 591 chicken embryo samples collected from five large-scale farms of Wenchang chicken in Hainan area.
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