Project description:Wooden Breast (WB) is a novel myopathy affecting the pectoralis major muscle of modern broiler chickens. We selected pectoralis fillet samples, a normal(healthy) fillet and a WB fillet.
Project description:The experiment aimed at investigating the profiles of two histone marks (H3K27me3 and H3K4me3) in muscle tissues (Pectoralis major) of 35 days-old control (n=3) and thermally-manipulated (cyclic rise in egg incubation temperature of 1.5°C from days 7 to 16 of embryogenesis; n=3) chickens.
Project description:RNA-seq analysis reveals spatial and sex differences in pectoralis major muscle of broiler chickens contributing to difference in susceptibility to wooden breast disease
Project description:The strategy to improve the competitiveness of smallholder farmers and to serve highly nutritious meat for consumers is the major goal of Korat chicken (KRC) production in Thailand. Organic KRC meat contains high n-3 polyunsaturated fatty acids (PUFA) and docosahexaenoic acid (DHA), which have a wide range of health-related benefits. However, limited scientific investigations have been conducted on the modulations of PUFA and DHA in KRC. In this study, we compared two rearing systems, conventional (CO) and organic raising (OR) systems, and their effects on global gene expression related to the accumulation of n-3 PUFA and DHA in the liver and pectoralis major muscle were investigated by using RNA-sequencing (RNA-seq). Total RNA was isolated from the liver and pectoralis major muscle of male KRC in each treatment group (n = 5). RNA-seq revealed a total of 561 and 361 differentially expressed genes between CO and OR groups identified in the liver and pectoralis major muscle, respectively. ELOVL fatty acid elongase 2 (ELOVL2) may activate n-3 PUFAs synthesis via the fatty acid elongation pathway. The KRC seems suitable to raise under the organic raising system, since it improved lipid metabolism and immune response in the liver. However, thermal environmental management and growth performance need to be considered. ELOVL2 can use as a gene marker for n-3 PUFAs synthesis in the liver. This study provides a genetic basis for future breeding strategies to improve the genetics of slow-growing chickens to fit with an organic raising system.
Project description:The aim of this study was to identify genes involved in the variation of the muscle glycogen content at death (estimated through the glycolytic potential, GP), a determining factor of meat quality in chicken. Gene expression profiles of Pectoralis major muscle were established using microarrays. We compared Fat and Lean chickens issued from two lines divergently selected for abdominal fatness and also differed for muscle GP. A total of 197 genes were differentially expressed between Fat and Lean pure chickens. Several of these genes were validated by qRT-PCR. For the genes with human orthologs, annotation analyses were performed and mainly revealed pathways involved carbohydrate, fatty-acid, and protein metabolism. The relationship between gene expression and meat quality has to now be validated by further e-QTL studies on the F2 population. 8 samples from Fat chickens were compared to 8 samples from Lean chickens, 4 of these were dye-swapped.
Project description:The goal of this study was to compare next-generation sequencing (NGS)-derived liver and pectoralis major transcriptome profilings (RNA-seq) of chicken fed control diet to treatment birds fed methionine restriction diet. We sequenced mRNA from 10 Gallus gallus males fed either control (L-Methionine) or L-Methionine-deficient diet (5 control and 5 treatment) from 3-5 weeks of age. We sequenced both liver and the pectoralis major muscle.
Project description:Detection of differentially expressed genes in broiler Pectoralis major muscle affected by White Striping – Wooden Breast myopathies
