RESUMEN
In this study, we obtained the whole genomes of three porcine bocaparvovirus (PBoV) strains (GD6, GD10, and GD23) by polymerase chain reaction. Sequence analysis showed that all three field strains belonged to PBoV group 3 (G3). The phylogenetic trees based on NS1, NP1, and VP1 differed to the extent that these PBoVs were potentially more closely related to bocaparvoviruses known to infect other animals than to other PBoVs. GD6, GD10, and GD23 all included the conserved sequences YLGPF and HDXXY, with known phospholipase A2 activity. Using recombination-detection software we identified a natural recombinant breakpoint in the NS1 region of PBoV G3. The results of this study will further the epidemiological characterization of PBoVs.
Asunto(s)
Bocavirus/genética , Genoma Viral , Infecciones por Parvoviridae/veterinaria , Fosfolipasas A2/genética , Filogenia , Enfermedades de los Porcinos/epidemiología , Proteínas Virales/genética , Secuencia de Aminoácidos , Animales , Bocavirus/clasificación , Bocavirus/aislamiento & purificación , China/epidemiología , Cartilla de ADN/química , Cartilla de ADN/metabolismo , ADN Viral/genética , Infecciones por Parvoviridae/epidemiología , Infecciones por Parvoviridae/virología , Reacción en Cadena de la Polimerasa , Recombinación Genética , Análisis de Secuencia de ADN , Porcinos/virología , Enfermedades de los Porcinos/virologíaRESUMEN
Pro-opiomelanocortin (POMC) and agouti-related protein (AGRP) are hypothalamic neuropeptides that play a central role in the regulation of food intake and energy expenditure and for this reason the variations in the POMC and AGRP genes in chicken were examined by screening the DNA pools. Two silent cSNPs mutations in POMC gene and one silent cSNP mutation in AGRP gene were identified. PCR-restriction fragment length polymorphism (RFLP) was used to test the cSNPs c. C495T in the POMC and c. C9T in the AGRP gene in the F2 resource population of Gushi chicken crossed with Anak broiler. The association analysis on the polymorphisms of POMC, AGRP gene and production traits showed that the c. C495T mutation in the POMC gene was significantly linked to the pelvis breadth at 4 weeks of age (P = 0.035), body weight at 2 weeks of age (P = 0.013) and was highly significantly linked to the chest depth at 12 weeks of age (P = 0.006). The c. T9T genotype in the AGRP gene was associated with a low breast muscle water loss rate (P = 0.025), increased chest width at 12 weeks of age (P = 0.005) and body weight at 2 weeks of age (P = 0.036), a high slaughter rate (P = 0.049) and semi-evisceration weight (P = 0.019). These findings may have important implications for the molecular aspects of chicken breeding.
Asunto(s)
Proteína Relacionada con Agouti/genética , Tamaño Corporal/genética , Pollos/genética , Proopiomelanocortina/genética , Animales , Secuencia de Bases , Peso Corporal , Cruzamiento , Pollos/anatomía & histología , Pollos/crecimiento & desarrollo , Femenino , Variación Genética , Masculino , Carne , Polimorfismo de Nucleótido Simple , Análisis de Secuencia de ADNRESUMEN
Ungulate bocaparvoviruses (UBoV) 2-5 are recently discovered porcine bocaparvoviruses belonging to the family Parvoviridae, and are considered to be a potentially major cause of swine diseases. In order to detect local UBoV2 epidemics in China, we developed a TaqMan-based real-time PCR (qPCR) assay targeting the UBoV2 VP1 gene and compared the results of qPCR with conventional PCR (cPCR). The qPCR reproducibly detected a recombinant DNA plasmid containing the VP1 gene over a range of eight orders of magnitude, from 9.97 × 10-1-106 copies/µL, with a lower limit of detection of 9.97 copies/µL, compared with approximately 9.97 × 102 copies/µL for cPCR. The qPCR assay showed no cross-reactivity with other UBoVs or other porcine viruses. This qPCR assay detected UBoV2 in 18.1% (84/463) of pig samples collected from Chinese swine herds, with the highest infection rate of 35.3% (53/150) in loose stools. UBoV2 was not detected in liver samples. The TaqMan-based qPCR assay established in this study was highly sensitive and specific for the diagnosis and quantification of UBoV2. The results of this study will further our understanding of the etiology, epidemiology, and pathogenesis of UBoV2 infection.