深圳市销售猪肉品中磺胺二甲嘧啶残留的调查

2005年我们对深圳市的超市、农贸市场销售的猪肉品(含猪肌肉、猪肝)进行磺胺二甲嘧啶残留的监测,共抽查猪肉品样品754份,检出阳性样品15份,阳性率为2.0/。

丹麦养猪业的考察体会

丹麦养猪业世界瞩目,2018—2019年笔者在丹麦达莱姆和布康农学院学习期间,学习、考察了丹麦养猪经验和模式。为此,本文从丹麦养猪产业概况、农业职业教育与科研、养猪育种体系、生物安全措施、现代化养猪设施设备、资源化与农业循环、养猪产业经营与国家农业委员会、猪肉品质控制体系等方面简述了丹麦关于养猪生产方面的情况。丹麦养猪业能够得到持续健康的发展、而且生产水平得到世界公认,得益于以下几方面的优势:给猪创造优良的生活环境,繁育出优质的品种,给猪吃完全符合猪生长需要的营养,注重环保、发展生态循环农业,配置先进的设施设备,公平合作的经营理念。

Sequence Analysis of Polymorphic Fragments in the Third Intron of Porcine H-FABP Gene

[ Objective] The aim of this study was to provide a theoretical basis for exploring the major genes affecting intramuscular fat （IMF） deposition. [Method] Taking 383 pigs from five breeds including Mashen Pig, Large White Pig, Landrace, Duroc and Shanxi White Pig as the experimental animals, polymorphisms of partial fragments in the third intron of porcine H-FABP gene were detected by PCR-SSCP method, and then the polymorphic fragments were sequenced. [ Result] Two alleles, designated as A and B, were found at the locus 346 in the third intron of porcine H-FABP gene, and the mutation was caused by a A→G substitution. [ Conclusion] A polymorphic locus was discovered in the third intron of porcine H-FABP gene in this experiment, laying a foundation for the further study on the relationship between H-FABP gene and IMF content.

A Review on Tibetan Swine(a)——Carcass,Meat Quality,Basic Nutrition Component,Amino Acids,Fatty Acids,Inosine Monophosphate and Muscle Fiber

In this review, the carcass, meat quality, internal organs, basic nutrition component, amino acids （AAs）, fatty acids, inosine monophosphate （IMP） and mus- cle fiber of Tibetan swine were summarized for the first time. The formation mecha- nism of excellent features was analyzed from the aspects of physiological traits, ge- ographical environments and constraint reasons. Thereby, the outstanding features of Tibetan swine could be extended continuously, and the poor characteristics should be improved in the future.

A Review of Factors Influencing Intramuscular Fat Content in Porcine Meat

Intramuscular fat （IMF）, an important flavor precursor of porcine meat, is closely related to pork quality traits such as pH, color, tenderness, water-holding capacity （WHC） and juiciness, and thus is one of the important factors affecting pork quality. Pork IMF content is not only associated with swine breed on heredity, but also influenced by the alteration of nutrients in diet. These may give a possibility for researchers to improve the IMF content and pork quality by their work on swine breed or heredity, and nutrition regulation in diet. Therefore, this article summarizes the effects of swine breed and nutrition regulation on IMF content briefly to provide some information for future researches.

Study on pig growth hormone gene polymorphisms in western meat-type breeds and Chinese local breeds

Chinese Meishan and Jiangquhai pigs are two of the most prolific pigs in the world, but their growth rate is lower than that of Duroc, Landrace and Pietrain pigs. It is suggested that growth rate is regulated by growth hormone. The objective of the current study was to analyze the porcine growth hormone (p GH ) gene polymorphisms based on the polymerase chain reaction restriction fragment length polymorphism method (PCR RFLP) for three western meat type breeds (Duroc, Landrace and Pietrain) and two local Chinese pigs (Meishan and Jiangquhai). Five polymorphic restriction sites were detected with the Apa I, Msp I, Bsp I and Hha I restriction enzymes in two amplified fragments (605 bp, -119 to +486; 506 bp, +206 to +711). Breed difference was found only in the 506 bp fragment. There was no difference in allelic frequencies of Bsp I and Hha I restriction sites among the five breeds ( P >0.05). Landrace and Meishan pigs lacked allele G 3 of Msp I site. The allele G 3 frequency of restriction Msp I site of the 506 bp fragment in Pietrain pigs was higher than that in Duroc and Jianquhai pigs ( P <0.001). For Apa I site, the Meishan pigs lacked allele G1 ; no difference was found in allelic frequencies among Pietrain, Duroc, Landrace and Jiangquhai pigs ( P > 0.05 ). This new and rapid PCR RFLP typing method is an attractive tool for analysis of porcine growth hormone gene restriction sites. The differences in Msp I and Apa I restriction sites may explain the growth difference between the foreign meat type breeds above mentioned and local Chinese pigs.

Discovering Niche Market： Consumer Preferences and Willingness to Pay for Organic Pork

With the concern for environmental quality and food safety, organic food products are becoming more important in the global market. In recent years the organic food industry has been expanding and sales of organic products have been increasing. Abundant studies have been done focusing on organic fruits and vegetables which focused on the shortage of organic live stocks. In this paper we focus our attention on organic pork products. Using a sample of 400 Thais consumers, this study proposes the contingent valuation （CV） technique to measure the willingness of individuals to pay a price premium for organic pork in Thailand. In order to obtain the mean ＂willingness to pay＂ （WTP）, a bivariate probit model was applied to provide information about the crucial variables that affect the WTP. The study revealed that variables that better approximate WTP are based on the lifestyle and knowledge about organic foods rather than the usual socioeconomic factors. The mean WTP on the premium price for organic pork is approximately 34.30 Bath per kg. In order to access the market potential this study shows that the suitable attributes of organic pork which is consistent with consumer preferences are composed of modernized and environmental packaging with special product details. Marketing this product to the buyer it should be set at a reasonable price. Stimulating the market should be done by doing sales promotion and public relations on a regularly basis. In addition, organic pork should be available in any places and convenient for customers to buy.

Effect of rearing conditions on carcass and pork quality attributes of finishing pigs

The effects of sex, housing temperature, feed ingredients and slaughter weight on carcass and meat quality were investigated. A total of three-way crossbred （LWD） 100 pigs were used in a completely randomized design to study the influence of rearing condition, in the growing finishing period, the initial weight, finial weight, live weight, total feeding days, daily weight gain and total feed consumptions affected carcass traits and meat qualities. In conclusion, the rearing condition will give a significant effect on pork and carcass quality so that they can be controlled by changing the raising situation.

Identification of four SNPs and association analysis with meat quality traits in the porcine Pitx2c gene

The association of the porcine Pitx2c gene with meat quality traits was investigated in the present study. A total of eight single nucleotide polymorphisms （SNPs） were found. Allele frequencies of four SNPs were further detected in four commercial breeds and eight Chinese indigenous breeds. Single SNP and meat quality associations were analyzed in a YorkshirexMeishan F2 population. The SNPs c.474C〉T （P〈0.01） and c.636C〉T （P〈0.05） showed a significant association with meat color （MCV1）. The SNPs c,＊37G〉A and c.＊47G〉A were significantly associated with drip loss rate （DLR）, water holding capacity （WHC） and meat color value （MCV1） consistently （P〈0.05）. Linkage disequilibrium （LD） analysis revealed that the adjacent SNPs were in LD. Two major haplotypes were identified, and association analysis between haplotype combinations and meat quality indicated that the presence of two copies of haplotype 1 -CCGG- may improve meat quality.