Search

This study aimed to investigate the carcass traits and meat quality of typical Chinese indigenous cattle breeds, and to compare the difference in beef composition between breeds. We measured 5 carcass traits and 61 meat quality indicators in each striploin and outside flat cuts. The results showed that northern Chinese breeds had superior beef production performance in terms of slaughter weight, carcass weight and lean meat weight compared to southern breeds. The improved breeds for meat specialized had significantly higher slaughter weights than local breeds (P < 0.01). With respect to edibility, Pingliang red cattle demonstrated superior tenderness with lower shear force. Xinjiang brown cattle and Jiaxian red cattle exhibited lower cooking and water loss rates. The improved breeds had higher fat content, while majority of the local breeds showed higher crude protein content.The comparison results of targeted metabolites indicated that local breeds had more flavor amino acids than improved breeds. Additionally, the composition of amino acids and fatty acids varied among breeds, and Chinese cattle exhibited a healthier composition compared to foreign breeds.This study clarifies the carcass characteristics and meat quality in Chinese cattle breeds, promoting the development of the beef cattle industry towards high efficiency and high quality. • Northern Chinese cattle exhibit superior carcass traits compared to Southern breeds. • Beef in striploins have lower shear force and cooking loss than outside flats. • Improved breeds exhibit higher fat content whereas local breeds had higher crude protein. • Local breeds outperform improved breeds in beef flavor-related amino acids. • JNC and LXC exhibited healthier fatty acid composition for human diet. [ABSTRACT FROM AUTHOR]

Porcine circovirus type 2 (PCV2) causes infectious diseases in pigs leading to considerable economic losses in the pig industry. To prevent and control PCV2 infections, is important to understand the prevalence and geographical distribution of the virus. We performed the first systematic review and meta-analysis to estimate the prevalence of PCV2 in China. From PubMed, ScienceDirect, Chinese Web of Knowledge, Wanfang, and VIP Chinese Journal, we extracted 53 studies published in China between 2015 and 2019. There were 29,051 samples, 14,230 of which were positive for PCV2. The pooled prevalence of PCV2 was 46.0%, with the highest in Northeastern China (58.1%). The highest prevalence was 86.3% in Xinjiang province. Nursery pigs had the highest prevalence of PCV2 (50.9%), and the serological test detected the highest number of cases (58.5%). PCV2 prevalence was 50.1% in intensive farms and 37.5% in extensive farms. Our findings showed that PCV2 is common throughout China. Effective control measures are necessary to reduce PCV2 infections. • Porcine circovirus type 2 (PCV2) is highly prevalent and uneven distribution in China. • A higher prevalence of PCV2 was detected in Serological test. • Intensive farming model may play an active role in the prevention of PCV2. • This is the first meta-analysis of PCV2 prevalence in China. [ABSTRACT FROM AUTHOR]