scholarly journals PORK QUALITY ATTRIBUTES: THEIR ESTIMATION AND THEIR RELATIONSHIPS WITH CARCASS COMPOSITION IN COMMERCIAL PIGS

1981 ◽  
Vol 61 (2) ◽  
pp. 289-298 ◽  
Author(s):  
A. H. MARTIN ◽  
H. T. FREDEEN ◽  
P. J. L’HIRONDELLE ◽  
A. C. MURRAY ◽  
G. M. WEISS
Keyword(s):  
Regional Differences ◽  
Quality Attributes ◽  
Carcass Composition ◽  
Muscle Quality ◽  
Longissimus Dorsi ◽  
Pork Quality ◽  
Regression Equations ◽  
Longissimus Dorsi Muscle ◽  
Dorsi Muscle ◽  
Wide Range

A survey of certain muscle parameters was conducted on 3114 swine carcasses at three major Canadian commercial packing plants and from a wide range in carcass fatness (backfat measurements) and carcass weights. Sex of carcass had no significant effect on pork quality measurements. There were large regional differences in the incidence of pale, soft, exudative (PSE) and dark, firm, dry (DFD) musculature and these may have resulted from differences in method of stunning (CO2 vs. electrical) or from differences in preslaughter stress and other management conditions associated with plant of origin. Muscle quality attributes were not associated with grade (ie., backfat and weight) and multiple regression equations based on several measures of carcass composition explained less than 11% of the variance observed in any of the quality attributes. The frequency of moderate to severely watery longissimus dorsi muscle (PSE score < 2.0) ranged from 2.5 to 9.7% depending on plant of origin, with plant differences in the frequency of DFD musculature (scores > 3.5) ranging from 21.5 to 34.9%. Muscle temperature and pH taken 45 min postmortem, the measures conventionally employed for early detection of potentially PSE pork, were of negligible utility for this purpose.

scholarly journals Competitive endogenous RNA network reveals that miR-1343 play key regulatory roles in longissimus dorsi muscle between Saba and Yorkshire pigs

2019 ◽  
Author(s):  
Wei Hu ◽  
Qiang Chen ◽  
Xiaoyi Wang ◽  
Xinxing Dong ◽  
Mingli Li ◽  
...  
Keyword(s):  
Regulatory Mechanism ◽  
Longissimus Dorsi ◽  
Pork Quality ◽  
Regulation Mechanism ◽  
Pig Breeds ◽  
Longissimus Dorsi Muscle ◽  
Dorsi Muscle ◽  
Muscle Formation ◽  
Yorkshire Pigs ◽  
Quality Formation

Abstract Background Pork quality is an important economic trait in pig industry, and increasing data shows that Chinese indigenous and Western commercial pig breeds have significant differences in pork quality. However, the molecular regulatory mechanism of pork quality formation is still unclear. The aim of this study was to explore the transcriptional regulation mechanism of pork quality formation of Chinese Saba pig (SS) and Western Yorkshire pig (YY) breeds. Results A total of 31 DEmiRNAs, 902 DEmRNAs, 47 DElncRNAs and 198 DEcircRNAs were identified in longissimus dorsi muscles between SSs and YYs. On the basis of differentially expressed RNAs, two ceRNA networks including lncRNA-miRNA-mRNA and circRNA-miRNA-mRNA were established, and two ceRNA networks showed that miR-1343 had the most links in two ceRNA networks, which demonstrated that miR-1343 might play key regulatory roles in longissimus dorsi muscle formation between SS and YY breeds. Conclusions The present study identified miR-1343 as key regulatory factor in pig longissimus dorsi muscle formation by ceRNA networks, which provides novel insights into molecular regulatory mechanism of pork quality formation between fat-type and lean-type pig breeds.

scholarly journals Real-time ultrasound to predict rabbit carcass composition and volume of longissimus dorsi muscle

2012 ◽  
Vol 41 (12) ◽  
pp. 2463-2466
Author(s):  
Severiano José Cruz da Rocha e Silva ◽  
André Mendes Jorge ◽  
José Luís Teixeira de Abreu Medeiros Mourão ◽  
Cristina Vitória de Miranda Guedes ◽  
Victor Manuel Carvalho Pinheiro
Keyword(s):  
Real Time ◽  
Carcass Composition ◽  
Longissimus Dorsi ◽  
Longissimus Dorsi Muscle ◽  
Dorsi Muscle ◽  
Rabbit Carcass

scholarly journals Transcriptome analysis of differential gene expression in the longissimus dorsi muscle from Debao and landrace pigs based on RNA-sequencing

2019 ◽  
Vol 39 (12) ◽  
Author(s):  
Shang-Qiao Song ◽  
Wei-wei Ma ◽  
Su-Xian Zeng ◽  
Chao-Long Zhang ◽  
Jin Yan ◽  
...  
Keyword(s):  
Reference Genome ◽  
Longissimus Dorsi ◽  
Pork Quality ◽  
Muscular Tissue ◽  
Longissimus Dorsi Muscle ◽  
Qrt Pcr ◽  
Dorsi Muscle ◽  
Pig Genome ◽  
Key Genes ◽  
The Difference

Abstract RNA-seq analysis was used to identify differentially expressed genes (DEGs) at the genetic level in the longissimus dorsi muscle from two pigs to investigate the genetic mechanisms underlying the difference in meat quality between Debao pigs and Landrace pigs. Then, these DEGs underwent functional annotation, Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment, and protein–protein interaction (PPI) analyses. Finally, the expression levels of specific DEGs were assessed using qRT-PCR. The reference genome showed gene dosage detection of all samples which showed that the total reference genome comprised 22342 coding genes, including 14743 known and 190 unknown genes. For detection of the Debao pig genome, we obtained 14168 genes, including 13994 known and 174 unknown genes. For detection of the Landrace pig genome, we obtained 14404 genes, including 14223 known and 181 unknown genes. GO analysis and KEGG signaling pathway analysis show that DEGs are significantly related to metabolic regulation, amino acid metabolism, muscular tissue, muscle structure development etc. We identified key genes in these processes, such as FOS, EGR2, and IL6, by PPI network analysis. qRT-PCR confirmed the differential expression of six selected DEGs in both pig breeds. In conclusion, the present study revealed key genes and related signaling pathways that influence the difference in pork quality between these breeds and could provide a theoretical basis for improving pork quality in future genetic thremmatology.

A Technique for Measuring the Cross-Sectional Axes of the Longissimus Dorsi Muscle and Fat Depth in Lambs1,2

1960 ◽  
Vol 19 (3) ◽  
pp. 803-809
Author(s):  
D. J. Matthews ◽  
R. A. Merkel ◽  
J. D. Wheat ◽  
R. F. Cox
Keyword(s):  
Longissimus Dorsi ◽  
Cross Sectional ◽  
Longissimus Dorsi Muscle ◽  
Dorsi Muscle ◽  
The Cross

Intrauterine Growth Restriction Alters the Genome-Wide DNA Methylation Profiles in Small Intestine, Liver and Longissimus Dorsi Muscle of Newborn Piglets

2019 ◽  
Vol 20 (7) ◽  
pp. 713-726 ◽  
Author(s):  
Shiyu Tao ◽  
Tianjiao Zhou ◽  
Perot Saelao ◽  
Ying Wang ◽  
Yuhua Zhu ◽  
...  
Keyword(s):  
Small Intestine ◽  
Birth Weight ◽  
Intrauterine Growth Restriction ◽  
Longissimus Dorsi ◽  
Intrauterine Growth ◽  
Longissimus Dorsi Muscle ◽  
Newborn Piglets ◽  
Dorsi Muscle ◽  
Genome Wide ◽  
Differentially Methylated Genes

Intrauterine growth restriction (IUGR) remains a major problem in swine production since the associated low birth weight leads to high rates of pre-weaning morbidity and mortality, and permanent retardation of growth and development. The underlying regulatory mechanisms from the aspects of epigenetic modification has received widespread attention. Studies explore the changes in genome wide methylation in small intestine (SI), liver and longissimus dorsi muscle (LDM) between IUGR and normal birth weight (NBW) newborn piglets using a methylated DNA immunoprecipitation-sequencing (MeDIP-Seq) approach. The data demonstrated that methylated peaks were prominently distributed in distal intergenic regions and the quantities of peaks in IUGR piglets were more than that of NBW piglets. IUGR piglets had relatively high methylated level in promoters, introns and coding exons in all the three tissues. Through KEGG pathway analysis of differentially methylated genes found that 33, 54 and 5 differentially methylated genes in small intestine, liver and longissimus dorsi muscle between NBW and IUGR piglets, respectively, which are related to development and differentiation, carbohydrate and energy metabolism, lipid metabolism, protein turnover, immune response, detoxification, oxidative stress and apoptosis pathway. The objective of this review is to assess the impact of differentially methylation status on developmental delay, metabolic disorders and immune deficiency of IUGR piglets.

scholarly journals PSII-22 Comparison of the meat quality traits of crossbred pigs and the Large Black pigs

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 241-242
Author(s):  
Yongjie Wang ◽  
Keshari Thakali ◽  
Sarah Shelby ◽  
Jason Apple ◽  
Yan Huang
Keyword(s):  
Meat Quality ◽  
Genomic Diversity ◽  
Longissimus Dorsi ◽  
Rna Seq ◽  
Longissimus Dorsi Muscle ◽  
A Value ◽  
Dorsi Muscle ◽  
Body Weights ◽  
C Value ◽  
Crossbred Pigs

Abstract The purpose of this study was to compare the meat quality and genomic differences between cross-bred commercial pig (CP) and domestic Large Black pig (BP). Seven cross-bred commercial pigs and eight British Large Black pigs were assigned to CP group and BP group, with initial mean body weights of 18.82±1.412 kg for CP group and 23.31±1.935 kg for BP group, P = 0.061, and fed ad libitum. The final BW of the CP at d101 was similar to the BP (130.0±8.16 kg vs. 121.1±2.80 kg, P = 0.132). However, the BP group took 108 days to reach the final BW. The ADG in the CP was higher than BP (1.102±0.0599 kg vs. 0.905±0.0138 kg, P = 0.003). The hot carcass weight of CP was higher (P &lt; 0.01) than BP, but the backfat of BP was higher (P &lt; 0.01) than CP. The a* value of CP was higher (P &lt; 0.05) than BP, and the c* value of CP was tended to be higher (P &lt; 0.10) than BP. However, the h value of BP was higher (P &lt; 0.05) than CP. The longissimus dorsi muscle fat content of BP was higher (P &lt; 0.05) than CP. For the fatty acid composition, the SFA and MUFA of BP were higher (P &lt; 0.05) than CP, but the PUFA of CP was higher (P &lt; 0.05) than BP. The metmyoglobin content of CP was tended to be higher (P &lt; 0.10) than BP. For the meat metabolism, the oxygen consumption of longissimus dorsi muscle of BP was higher (P &lt; 0.01) than CP. The RNA-Seq data showed that the expression of the genes related to lipid metabolism is higher in BP (fold change &gt; 3, P &lt; 0.05). To conclude, BP has higher meat quality, while CP has its advantages in growth performance. And the differences between these two breeds may due to the genomic diversity.

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